The FLASH HDF5 structure

== Contents ==

5

6

\\

== General information about HDF5 ==

13

14

HDF5 is a data format maintained by the HDF group. For detailed general information see [[here~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://portal.hdfgroup.org/display/support||shape="rect"]]

15

16

To download the HDF5 Viewer click [[here~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://portal.hdfgroup.org/display/support/Download+HDFView||shape="rect"]]

17

18

For use on the DESY Maxwell or PAL (max-fsc or pal) **hdfview** is available in the xray module :

19

{{code language="none"}}> module load xray{{/code}}

20

{{code language="none"}}> hdfview{{/code}}

or you can use

{{code language="none"}}> silx view{{/code}}

\\

[[Contents>>doc:||anchor="Contents"]]

29

30

== The FLASH HDF5 format ==

31

32

FLASH provides a conversion of its data acquisition (DAQ) to the commonly used [[HDF5>>url:https://www.hdfgroup.org/solutions/hdf5/||shape="rect"]] format. Correlated data are mapped by a primary index called **train ID**. Every data set has an individual index of train IDs to identify the data even when data are missing or deviate in update rate. If the data set of choice contains gaps, users have to decide how to treat missing values. DAQ channels are spread across various files with one file name pattern for each DAQ. This means users have to assemble data from different files if necessary.

33

34

The hierarchy is realized using a human readable named HDF tree with each DAQ channel containing the data sets "//value//" and "//index//". Additionally, the HDF group //zraw// contains a tree of the original DAQ channel names.

35

36

Reference implementation, which follows the concept of Python libraries like Pandas, Xarray, or Dask, is given below.

\\

=== Comparison to FLASH's deprecated HDF formats ===

42

43

Before 2021, FLASH provided two different HDF formats formally known as //near-online// and //offline// HDF files.

44

45

All data sets were aligned by the same global index by filling in missing data. Fast DAQ channels (pulse synchronous data - update 10 Hz) are filled in by NaN or 0, slow channels (not pulse synchronous data - update e.g. 1 Hz ) are interpolated by the DAQs libraries, by keeping the value constant up to the next change.

46

47

While the near-online HDF files were converted live during the beamtime, the offline HDF files were manually compiled weeks/months later. Near-online HDF files were used by a provided API [[BeamtimeDaqAccess>>url:https://confluence.desy.de/display/FLASHUSER/Near-Online+data+analysis#Near-Onlinedataanalysis-BriefUserGuidetoBeamtimeDAQAccess||shape="rect"]], which also searches for DAQ channels in files. With assembled files "by run", all DAQ channels were existing in the same HDF file. While shorter runs usually fitted into one file, longer runs still had to be aggregated over several files. The creation of the assembled type of files still involves the use of fairly unstable DAQ Mex-functions As the environment required for using the Mex-functions is already deprecated, its continued existence is uncertain.

48

49

The HDF hierarchy is almost identical in all formats. While in the the recent format each DAQ channel contains the data sets "value" and "index", the deprecated format had one data set for each DAQ channel. The deprecated formats supplies no time axis parameters for spectra data types.

\\

**HDF5 example files (old format)**

54

55

Here we have a few HDF5 samples (User data combined with Photon diagnostics data) from a few beamtimes showing the different kind options.

56

57

[[image:attach:image2019-10-21_17-2-50.png||thumbnail="true" width="300"]] [[download HDF5 (Images @ FL2)>>url:https://desycloud.desy.de/index.php/s/nyEgeCWJFC4gao2||shape="rect"]]

\\

[[~[~[image:attach:image2019-10-22_10-52-27.png~|~|thumbnail="true" width="300"~]~]download HDF5 (GHz ADC and OPIS @ FL2)>>url:https://desycloud.desy.de/index.php/s/AeA2kPNNnZgX95A||shape="rect"]]

\\

\\

=== HDF examples: ===

* ADC data as example for **fast** **data** (10 Hz):

\\

[[image:attach:image2020-11-16_15-26-28.png||height="250"]]

* The //average// FEL pulse energy as example for the **slow** **data** (different e.g. 1 Hz):

83

84

( every 10th train ID is listed in the HDF group "index")

\\

[[image:attach:image2020-11-16_15-31-45.png||height="250"]]

* (((

//zraw// group contains the **original DAQ (DOOCS) names**

94

)))

95

96

of the properties saved in the DESY internal raw format. (For experts)

\\

[[image:attach:image2020-11-16_16-26-3.png||height="400"]]

=== Reference implementation (Python) ===

108

109

(imperative) (% class="Object" %)[[https:~~/~~/gitlab.desy.de/christopher.passow/flash-daq-hdf>>url:https://gitlab.desy.de/christopher.passow/flash-daq-hdf||shape="rect"]]

110

111

(% class="Object" %)(object oriented) [[https:~~/~~/gitlab.desy.de/christopher.passow/fdh-builder>>url:https://gitlab.desy.de/christopher.passow/fdh-builder.git||shape="rect"]]

== Complete list of recordable parameters ==

119

120

The complete list for the relation between DOOCS names and HDF5 names for the recordable parameters can be found in [[DESY's Repository~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://stash.desy.de/projects/CS/repos/pah/browse/src/camp/data/channel2HdfName.dat||shape="rect"]].

121

\\

122

123

== Most popular FLASH parameters and their names in HDF5, DOOCS and (raw) DAQ ==

Note, the HDF group and data set names apply to our HDF tree version since vers. 0.3.0.

\\

=== FLASH1 ===

==== Beamline info (FLASH1) ====

134

135

{{code language="none"}}/FL1/Beamlines/Attenuator/pressure{{/code}}

136

//always saved (PBD)//

137

DOOCS prop : {{code language="none"}}FLASH.FEL/GAS_DOSING/FL1.ATTENUATOR/PRESSURE{{/code}}

138

DAQ channel: {{code language="none"}}FLASH.FEL/GAS_DOSING/FL1.ATTENUATOR/PRESSURE{{/code}}

139

desc: set pressure in the gas attenuator

units: mbar

\\

{{code language="none"}}/FL1/Beamlines/BL/Fast shutter/open{{/code}}

144

//always saved (PBD)//

145

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/BL.SHUTTER/CH00.TD{{/code}}

146

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/BL.SHUTTER{{/code}}

147

desc: BL Beamline Fast shutter state

units: none

\\

{{code language="none"}}/FL1/Beamlines/PG/Fast shutter/open{{/code}}

152

//always saved (PBD)//

153

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/PG.SHUTTER/CH00.TD{{/code}}

154

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/PG.SHUTTER{{/code}}

155

desc: PG Beamline Fast shutter state

units: none

\\

{{code language="none"}}/FL1/Beamlines/BL/Filters/BL filter wheel/position filter 1{{/code}}

160

//always saved (PBD)//

161

DOOCS prop : {{code language="none"}}TTF2.FEL/BLFILTERS1/FILTER1/FW.MOTOR.POS{{/code}}

162

DAQ channel: {{code language="none"}}TTF2.FEL/BLFILTERS1/FILTER1/FW.MOTOR.POS{{/code}}

163

desc: Position of the BL filter wheel 1 - to correlate with the filter material please look [[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]

units: degree

\\

{{code language="none"}}/FL1/Beamlines/BL/Filters/BL filter wheel/position filter 2{{/code}}

168

//always saved (PBD)//

169

DOOCS prop : {{code language="none"}}TTF2.FEL/BLFILTERS2/FILTER2/FW.MOTOR.POS{{/code}}

170

DAQ channel: {{code language="none"}}TTF2.FEL/BLFILTERS2/FILTER2/FW.MOTOR.POS{{/code}}

171

desc: Position of the BL filter wheel 2 - to correlate with the filter material please look [[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]

units: degree

\\

{{code language="none"}}/FL1/Beamlines/PG/Filters/position filter 1{{/code}}

176

//always saved (PBD)//

177

DOOCS prop : = TTF2.FEL/BDAF1/BDA.F1/FW.MOTOR.POS=

178

DAQ channel: {{code language="none"}}TTF2.FEL/BDAF1/BDA.F1/FW.MOTOR.POS{{/code}}

179

desc: Position of the PG filter wheel 1

units: degree

\\

{{code language="none"}}/FL1/Beamlines/PG/Filters/position filter 2{{/code}}

184

//always saved (PBD)//

185

DOOCS prop : {{code language="none"}}TTF2.FEL/BDAF2/BDA.F2/FW.MOTOR.POS{{/code}}

186

DAQ channel: {{code language="none"}}TTF2.FEL/BDAF2/BDA.F2/FW.MOTOR.POS{{/code}}

187

desc: Position of the PG filter wheel 2

units: degree

\\

{{code language="none"}}/FL1/Beamlines/PG/Filters/position filter 3{{/code}}

192

//always saved (PBD)//

193

DOOCS prop : {{code language="none"}}TTF2.FEL/PGFILTERS/PGFILTERS/FW.MOTOR.POS{{/code}}

194

DAQ channel: {{code language="none"}}TTF2.FEL/PGFILTERS/PGFILTERS/FW.MOTOR.POS{{/code}}

195

desc: Position of the PG filter wheel 3

units: degree

\\

NOTE: Aperture positions in the beamline as well as the positions of the beam steering mirrors are also saved. For more Info contact your local contact

202

203

[[Contents>>doc:||anchor="Contents"]]

\\

==== Photon Diagnostics SASE ([[GMD>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/gmd_intensity_and_position/index_eng.html||shape="rect"]]) ====

\\

(% style="color: rgb(0,0,0);" %)**Discontinued GMD data recording / evaluation (VME + PhotonFlux ML server)**

212

213

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}}

214

//always saved (PBD)//

215

216

(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT04/VAL{{/code}} (%%)

217

(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENPULSEIC{{/code}}(%%)

218

desc : calibrated average SASE Energy/pulse measured in the TUNNEL upstream the gas attenuator (ion current)

219

units : microJ

220

221

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}}

222

//always saved (PBD)//

223

224

DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT34/VAL{{/code}}

225

DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENERGYPULSE.USER{{/code}}

226

desc :Energy per pulse Tunnel (from e-) - the values are set to "0" if there was no SASE beam in the FEL

227

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) **[[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

228

229

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel (raw){{/code}}

230

//always saved (PBD)//

231

DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT14/VAL{{/code}}

232

DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENERGYPULSE.FF{{/code}}

233

desc :Energy per pulse Tunnel (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise

234

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) **[[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

235

236

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy BDA{{/code}}

237

//always saved (PBD)//

238

239

DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT05/VAL{{/code}}

240

DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENPULSEIC{{/code}}

241

desc : calibrated average SASE Energy/pulse measured in the BDA (in the experimental hall) after the attenuator (ion current)

242

units : microJ

243

244

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA{{/code}}

245

//always saved (PBD)//

246

247

DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT35/VAL{{/code}}

248

DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENERGYPULSE.USER{{/code}}

249

desc :Energy per pulse BDA (from e-) - the values are set to "0" if there was no SASE beam in the FEL

250

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) **[[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

251

252

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA (raw){{/code}}

253

//always saved (PBD)//

254

DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT15/VAL{{/code}}

255

DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENERGYPULSE.FF{{/code}}

256

desc :Energy per pulse BDA (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise

257

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision)** [[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

\\

(% style="color: rgb(0,0,0);" %)**NEW (2021) GMD data recording / evaluation (MTCA, analog to FLASH2 and XFEL)**

262

263

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}}

264

//always saved (PBD)//

265

(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL1.TUNNEL/PHOTONFLUX.UJ{{/code}} (%%)

266

(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL1.TUNNEL/PHOTONFLUX.UJ{{/code}}

267

268

desc : calibrated average SASE Energy/pulse measured in the TUNNEL upstream the gas attenuator

units : microJ

\\

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}}

274

//always saved (PBD)//

275

276

(% style="color: rgb(0,0,0);" %)DOOCS prop :

277

{{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL1.TUNNEL/INTENSITY.TD{{/code}}DAQ channel: {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL1.TUNNEL/INTENSITY.TD{{/code}}

278

279

desc : Energy per pulse measured in the Tunnel. In addition measurement errors and beam position are included for EACH pulse in the pulse train !! (see below)

280

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision)** [[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

281

282

283

For every pulse in the pulse train the information is saved:

284

285

286

1. **Intensity per pulse** (a.u. (more or less µJ ))

287

1. Intensity per pulse (auxillary GMD) - not used

288

1. Position horizontal (mm, for a single pulse the position information may be very noisy - talk to your local contact)

289

1. Position vertical (mm, for a single pulse the position information may be very noisy - talk to your local contact)

290

1. **Intensity per pulse sigma** (a.u. (more or less µJ ), (% style="color: rgb(0,0,0);" %)This parameter gives an indication of the error of the measurement of the pulse energy. This takes signal to noise, detector resolution, uncertainties in crossection etc into account. (it is NOT the measurement of the statistical fluctuation of the SASE pulses)(%%))

291

1. Position horizontal sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

292

1. Position vertical sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

293

1. Combined warning and error flags

294

295

The pulse energy and the error are plotted for the first bunch of the pulse trains saved in this

file

[[image:attach:image2021-2-9_10-51-6.png||height="250"]]

\\

All values for the GMD are also available for the** BDA GMD **which is located in the experimental hall down stream the gas attenuator. If the attenuator is on the ratio between BDA and Tunnel signal shows the attenuation. **BUT NOTE** that the filter units are downstream the GMD. So if filters are used this influence is NOT measured by the GMD BDA !

\\

Besides pulse energy the GMD also provides information about the beam position

309

310

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position BDA horizontal{{/code}}

311

//always saved (PBD)//

312

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS{{/code}}

313

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS{{/code}}

314

desc :Beam position of the photon Beam determined by the GMD (BDA, x=horizontal)

315

units : mm

316

317

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position BDA vertical{{/code}}

318

//always saved (PBD)//

319

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IY.POS{{/code}}

320

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IY.POS{{/code}}

321

desc :Beam position of the photon Beam determined by the GMD (BDA, y=vertical)

322

units : mm

323

324

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position tunnel horizontal{{/code}}

325

//always saved (PBD)//

326

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IX.POS{{/code}}

327

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IX.POS{{/code}}

328

desc :Beam position of the photon Beam determined by the GMD (TUNNEL, x=horizontal)

329

units : mm

330

331

{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position tunnel vertical{{/code}}

332

//always saved (PBD)//

333

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IY.POS{{/code}}

334

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IY.POS{{/code}}

335

desc :Beam position of the photon Beam determined by the GMD (TUNNEL, y=vertical)

units : mm

\\

==== Spectrometer (FLASH1) ====

341

342

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength{{/code}}

343

_always saved (when Spectrum is measured !!) (PBD) _

344

DOOCS prop : {{code language="none"}}TTF2.EXP/PHOTONWL.ML/WAVE_LENGTH/VAL.TD{{/code}}

345

DAQ channel: {{code language="none"}}PBD.PHOTONWL.ML/WAVE_LENGTH{{/code}}

346

desc : XUV Spectrum measured with the "tunnel spectrometer"

347

units :

348

349

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength start value{{/code}}

350

_always saved (when Spectrum is measured !!) (PBD) _

351

DOOCS prop : {{code language="none"}}TTF2.EXP/PBD.PHOTONWL.ML/BSTART/VAL{{/code}}

352

DAQ channel: {{code language="none"}}TTF2.EXP/PBD.PHOTONWL.ML/BSTART/VAL{{/code}}

353

desc : start value (in nm) for the wavelength axis of the XUV Spectrum measured with the "tunnel spectrometer"

354

units : nm

355

356

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength increment{{/code}}

357

_always saved (when Spectrum is measured !!) (PBD) _

358

DOOCS prop : ==

359

DAQ channel: ==

360

desc : increment value (in nm) for each pixel for the wavelength axis of the XUV Spectrum measured with the "tunnel spectrometer"

361

units : nm

362

363

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon energy{{/code}}

364

//saved on DEMAND (PBD spectrometer stream)//

365

DOOCS prop : ==

366

DAQ channel: {{code language="none"}}PBD.PHOTONEN.ML/PHOTON_ENERGY{{/code}}

367

desc : XUV Spectrum in eV measured with the "PG2 spectrometer"

368

units :

369

370

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon energy start value{{/code}}

371

//saved on DEMAND (PBD spectrometer stream)//

372

DOOCS prop : ==

373

DAQ channel: ==

374

desc : start value (in eV) for the wavelength axis of the XUV Spectrum measured with the "PG2 spectrometer"

375

units : eV

376

377

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon energy increment{{/code}}

378

//saved on DEMAND (PBD spectrometer stream)//

379

DOOCS prop : ==

380

DAQ channel: ==

381

desc : increment value (in eV) for each pixel for the wavelength axis of the XUV Spectrum measured with the "PG spectrometer"

382

units : eV

383

384

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon wavelength{{/code}}

385

//saved on DEMAND (PBD spectrometer stream)//

386

DOOCS prop : ==

387

DAQ channel: {{code language="none"}}PHOTONEN.ML/PHOTON_WAVE_LEN{{/code}}

388

desc : XUV Spectrum in nm measured with the "PG2 spectrometer"

389

units :

390

391

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon wavelength increment{{/code}}

392

//saved on DEMAND (PBD spectrometer stream)//

393

DOOCS prop : ==

394

DAQ channel: ==

395

desc : start value (in nm) for the wavelength axis of the XUV Spectrum measured with the "PG2 spectrometer"

396

units : nm

397

398

{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon wavelength start value{{/code}}

399

//saved on DEMAND (PBD spectrometer stream)//

400

DOOCS prop : ==

401

DAQ channel: ==

402

desc : increment value (in nm) for each pixel for the wavelength axis of the XUV Spectrum measured with the "PG spectrometer"

403

units : nm

404

405

[[Contents>>doc:||anchor="Contents"]]

406

407

==== Electron Beam properties (FLASH1) ====

408

409

===== bunch charge =====

410

411

{{code language="none"}}/FL1/Electron Diagnostic/Bunch charge/after undulator{{/code}}

412

//always saved (PBD)//

413

DOOCS prop : {{code language="none"}}FLASH.DIAG/TOROID.ML/12EXP/CHARGE.FLASH1{{/code}}

414

DAQ channel: {{code language="none"}}FLASH.DIAG/TOROID/12EXP{{/code}}

415

desc: electron bunch charge (FLASH1)

units: nC

=====

arrival time =====

{{code language="none"}}/FL1/Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}

422

//always saved (PBD)//

423

DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}

424

DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}}

425

desc: Electron bunch arrival time measured with the BAM inside the accelerator - however shows a very good correlation to the arrivaltime of the XUV pulses in the experiment (pulse resolved data).

426

units: ps (bigger numbers indicate later arrivaltime of the electrons)

427

428

{{code language="none"}}/FL1/Electron Diagnostic/BAM/1SFELC/electron bunch arrival time (low charge){{/code}}

429

//always saved (PBD)//

430

DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/1SFELC/LOW_CHARGE_ARRIVAL_TIME{{/code}}

431

DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/1SFELC.LOW_CHARGE_ARRIVAL_TIME{{/code}}

432

desc: Electron bunch arrival time measured with the BAM before the undulator (pulse resolved data). This one was newly installed in 2020.

433

units: ps (bigger numbers indicate later arrivaltime of the electrons)

434

435

436

* besides the arrivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved.In case of doubt ask your local contact

437

* [[Link a collection of papers related to the BAM and the analysis of pump-probe experiments >>doc:FLASHUSER.Additional helpful things.FLASH beamlines and instruments references.WebHome]]

438

* [[LINK to detailed infos from MSK (may only work inside DESY network~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://www.desy.de/~~mbock/pages/BAM_daq_channel_descriptions.html||shape="rect"]]

439

* a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]]

\\

===== electron beam profile =====

445

446

{{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/TDS profile{{/code}}

447

//always saved (PBD) - IF LOLA is ON and ACTIVATED in the PBD DAQ (talk to expert)//

448

DOOCS prop : {{code language="none"}}TTF2.DAQ/BEAM.PROF.ML/BEAM.PROF/OUT.PROF.CCCED{{/code}}

449

DAQ channel: {{code language="none"}}PBD.BEAM.PROF.ML/DAQ.OUT.PROF.CCCED{{/code}}

450

desc: temporal profile of electron bunch, y axis in Ampers (FLASH1)

units: pixel

\\

{{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/Expert stuff/TDS calibration constant{{/code}}

455

//always saved (PBD) - IF LOLA is ON and ACTIVATED in the PBD DAQ (talk to expert)//

456

DOOCS prop : {{code language="none"}}TTF2.DAQ/BEAM.PROF.ML/BEAM.PROF/CALIB.CONST.T{{/code}}

457

DAQ channel: = PBD.BEAM.PROF.ML/CCT=

458

desc: TDS calibration constant for the x-axis of the profiles: fs per pixel

units: fs per pixel

\\

{{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/TDS profile width rms{{/code}}

463

//always saved (PBD) - IF LOLA is ON and ACTIVATED in the PBD DAQ (talk to expert)//

464

DOOCS prop : {{code language="none"}}TTF2.DAQ/BEAM.PROF.ML/BEAM.PROF/SOWS.W.CCTED{{/code}}

465

DAQ channel: {{code language="none"}}PBD.BEAM.PROF.ML/PROFWIDTHCCTED{{/code}}

466

desc: rms pulse width of the measures TDS electron bunch profile

467

units: fs

468

469

===== electron bunch energy =====

470

471

{{code language="none"}}/FL1/Electron Diagnostic/Electron energy/average electron energy{{/code}}

472

//always saved (PBD)//

473

DOOCS prop : {{code language="none"}}TTF2.DAQ/ENERGY.DOGLEG/E_INTRA_MEAN/VAL{{/code}}

474

DAQ channel: {{code language="none"}}PBD.ENERGY.DOGLEG/E_MEAN{{/code}}

475

desc: electron bunch energy (average over the bunch train)

476

units: (% class="twikiNewLink" %)MeV(%%)

477

\\

478

479

{{code language="none"}}/FL1/Electron Diagnostic/Electron energy/pulse resolved energy{{/code}}

480

//always saved (PBD)//

481

DOOCS prop : {{code language="none"}}TTF2.DAQ/ENERGY.DOGLEG/E_SPECT/VAL.TD{{/code}}

482

DAQ channel: {{code language="none"}}PBD.ENERGY.DOGLEG/E_SPECT{{/code}}

483

desc: electron bunch energy bunch resolved

484

units: (% class="twikiNewLink" %)MeV

\\

{{code language="none"}}/FL1/Electron Diagnostic/Electron energy/wavelength bunch train average{{/code}}

489

//always saved (PBD)//

490

DOOCS prop : {{code language="none"}}TTF2.DAQ/ENERGY.DOGLEG/LAMBDA_MEAN/VAL{{/code}}

491

DAQ channel: {{code language="none"}}PBD.ENERGY.DOGLEG/LAMBDA_MEAN{{/code}}

492

desc: Wavelength calculated by the electron bunch energy (average over the bunch train) (FLASH1)

units: nm

\\

[[Contents>>doc:||anchor="Contents"]]

\\

==== Timing information, rep rate etc. (FLASH1) ====

501

502

===== bunch repetition rate =====

503

504

{{code language="none"}}/FL1/Timing/repetition rate{{/code}}

505

//always saved (PBD)//

506

DOOCS prop : {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/REP_RATE_KHZ.1{{/code}}

507

DAQ channel: {{code language="none"}}TTF2.UTIL/LASER.CONTROL/GUN/PULSE_FREQ{{/code}}

508

desc: repetition rate of the bunches / pulses within the burst (FLASH1)

units: kHz

\\

===== set number of pulses =====

513

514

{{code language="none"}}/FL1/Timing/set number of bunches{{/code}}

515

//always saved (PBD)//

516

DOOCS prop : {{code language="none"}}FLASH.DIAG/TOROID.ML/3GUN/NUMBEROFBUNCHES.FLASH1{{/code}}

517

DAQ channel: {{code language="none"}}TTF2.UTIL/LASER.CONTROL/GUN/PULSE_NUM{{/code}}

518

desc: Number of pulses set at the gun (FLASH1)

519

units:

520

521

===== actual number of pulses =====

522

523

{{code language="none"}}/FL1/Timing/actual number of bunches{{/code}}

524

//always saved (PBD)//

525

DOOCS prop : {{code language="none"}}FLASH.DIAG/TOROID.ML/12EXP/NUMBEROFBUNCHES.FLASH1{{/code}}

526

DAQ channel: {{code language="none"}}TTF2.DIAG/PBD.TOROID.ML/12EXP{{/code}}

527

desc: Number of bunches measured BEHIND the undulator. If pulses are used for diagnostic of the protection system of the accelerator limits the number of bunches to be accelerated this is the actual number that created XUV radiation.The number is calculated by the DAQ middle layer server, (FLASH1)

units:

\\

===== actual pulse pattern recorded after the undulator =====

532

533

{{code language="none"}}/FL1/Timing/Bunch pattern/pattern after undulator{{/code}}

534

//always saved (PBD)//

535

DOOCS prop : {{code language="none"}}TTF2.DIAG/PBD.TOROID.ML/12EXP/CHARGE.TD{{/code}}

536

DAQ channel: {{code language="none"}}TTF2.DIAG/PBD.TOROID.ML/12EXP{{/code}}

537

desc: The bunch pattern as function of time in a burst recorded by toroid diagnostic BEHIND the undulator. (FLASH1)

units:

\\

===== Train ID =====

{{code language="none"}}/Timing/train ID{{/code}}

544

//always saved (PBD)//

545

DOOCS prop : {{code language="none"}}none{{/code}}

546

DAQ channel: {{code language="none"}}none{{/code}}

547

desc: Each 10 Hz burst has its unique train ID. For the HDF5 data set the ID is the same for all parameters with the same index (note camera images may be shifted by 1 ID - talk to the experts !)

units:

\\

===== Train time =====

552

553

{{code language="none"}}/Timing/train time{{/code}}

554

desc:Local time as array of day, hour, minute, second, and centisecond. This data set is meant for visualization purposes only. For correlations use the train ID or the Unix time of the time stamp

units: d h min s cs

\\

{{code language="none"}}/Timing/time stamp{{/code}}

559

desc:first column: Local time in unix time. To get day, hour, minute, second you can use unix: e.g. date ~-~-date='@1553617729' or matlab, python etc

560

second column: microseconds

561

third column: Train ID of FLASH

562

\\

563

564

[[Contents>>doc:||anchor="Contents"]]

\\

==== Pump Probe Laser (FLASH1) ====

569

570

{{code language="none"}}/FL1/Experiment/Pump probe laser/laser attenuation{{/code}}

571

572

//always saved (PBD)//

573

DOOCS prop : {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/ROT2.CURRENT{{/code}}

574

DAQ channel: {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/ROT2.CURRENT{{/code}}

575

desc: attenuation of the PPLaser (rotation of a waveplate)

576

units : 0 no transmission , 1: full transmission

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/laser delay{{/code}}

581

//always saved (PBD)//

582

DOOCS prop : {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/DLY1.CURRENT{{/code}}

583

DAQ channel: {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/DLY1.CURRENT{{/code}}

584

desc: delay of the Pump probe laser - measured by the read back position of the motor. only read out every secound ... better use the encoder

585

units : ps ( pos delay means IR comes later)

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/delay line IK220.0/ENC.DELAY{{/code}}

590

//always saved (PBD)//

591

DOOCS prop : {{code language="none"}}TTF2.FEL/DELLINE.ENC/IK220.0/ENC.DELAY{{/code}}

592

DAQ channel: {{code language="none"}}TTF2.FEL/DELLINE.ENC/IK220.0:ENC.DELAY{{/code}}

593

subsystem: {{code language="none"}}DELLINE.ENC{{/code}} desc : delay of the Pump probe laser - measured by an encoder. The position is read out with 10Hz train synchronized and should be used to determine the actual laser delay (the motor position is only read out about every second

594

units : ps ( pos delay means IR comes later)

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/Synchronization/timing jitter RMS GECCO{{/code}}

599

//always saved (PBD)//

600

DOOCS prop : {{code language="none"}}FLASH.SYNC/F1PPL.LASER_LOCK/28C.F1PPL1.CONTROLLER/ADV_CTRL_MANAGER.0.PID_INPUT_JITTER.2.RD{{/code}}

601

DAQ channel: {{code language="none"}}FLASH.SYNC/F1PPL.LASER_LOCK/28C.F1PPL1.CONTROLLER/ADV_CTRL_MANAGER.0.PID_INPUT_JITTER.2.RD{{/code}}

602

desc: rms jitter of the GECCO (% class="twikiNewLink" %)TiSa(%%) Oscillator units: fs

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/streak camera delay time{{/code}}

607

//always saved (PBD)//

608

DOOCS prop : {{code language="none"}}TTF2.FEL/TDOLFEL/TDOLFEL/STREAK.CAM.TIME{{/code}}

609

DOOCS prop : {{code language="none"}}TTF2.FEL/TDOLFEL/TDOLFEL/STREAK.CAM.TIME{{/code}}

610

desc: delay time between the optical laser and the FEL units: ps

\\

[[Contents>>doc:||anchor="Contents"]]

\\

==== User Data (FLASH1) ====

619

620

The data saved specifically for detectors at an experiment will show up in /Experiment/ there is a large number of options for cameras or monitoring of slow properties (motor positions etc) for user experiments. For details please ask your local contact.

621

622

NOTE: If parameters for an experiment are included on short notice the correct naming in the HDF5 may not be in time and the data will show up in /uncategorized/ with the DOOCS names

623

624

The most common and permanently installed device used by experiment are our ADCs:

===== GHz ADCs =====

ADC traces of the (SPDevices 412) GHZ ADCs available for the users . More information about the ADCs can be found** [[here>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).MTCA ADCs.WebHome]]**

629

//saved on DEMAND in the user DAQ//

630

\\The HDF5 names for the ADC traces are depending on the beamline :

631

\\PG Beamline:

632

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH00/TD{{/code}}

633

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH01/TD{{/code}}

634

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH02/TD{{/code}}

635

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH03/TD{{/code}}

636

637

BL Beamlines:

638

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH00/TD{{/code}}

639

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH01/TD{{/code}}

640

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH02/TD{{/code}}

641

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH03/TD{{/code}}

642

\\{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH00/TD{{/code}}

643

{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH01/TD{{/code}}

644

\\{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH02/TD{{/code}}

645

{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH03/TD{{/code}}

646

647

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00/CH00.TD or CH00.DAQ.TD{{/code}}

648

here the {{code language="none"}}CH00.TD{{/code}} is the full ADC trace as it is sampled ( typically several 100.000 samples per pulse train) while the {{code language="none"}}CH00.DAQ.TD{{/code}} trace only has the number of samples which are sent to the DAQ OR if //grouping// is activated the {{code language="none"}}CH00.DAQ.TD{{/code}} contains only the grouped spectra. To read the ADC trace with an online analysis program the {{code language="none"}}CH00.DAQ.TD{{/code}} is used preferably.

649

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00{{/code}}

650

651

In addition there are also additional parameters saved like:

652

653

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

654

* {{code language="none"}}number of samples{{/code}}: total number of samples recorded for each 10 Hz trigger

655

* {{code language="none"}}error (ADC):{{/code}} 0 indicates that there was no error

===== MHz ADCs =====

similar to the GHz ADCs the MHz ADCs are saved with HDF5 names like:

660

{{code language="none"}}/FL1/Experiment/BL1/SIS8300 100MHz ADC/CH2/TD{{/code}}

661

DOOCS prop : FLASH.FEL/ADC.SIS.BL1/EXP1.CH02/CH00.TD

662

DAQ channel: : FLASH.FEL/ADC.SIS.BL1/EXP1.CH02

663

664

In addition there are also additional parameters saved like:

665

666

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

667

* {{code language="none"}}number of samples{{/code}}: total number of samples recorded for each 10 Hz trigger

668

669

[[Contents>>doc:||anchor="Contents"]]

\\

\\

\\

=== FLASH2 ===

There is analog to FLASH1 a permanently running "PhotonDagnostic DAQ FLASH2" (PBD2) and 2 User DAQs

680

681

==== Beamline info (FLASH2) ====

682

683

{{code language="none"}}/FL2/Beamlines/Attenuator/pressure {{/code}}

684

(% style="color: rgb(0,0,0);" %)//always saved (PBD2)// (%%)

685

(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}FLASH.FEL/ATT.GAS_DOSING/FL2.HALL/PRESSURE{{/code}} (%%)

686

(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}FLASH.FEL/ATT.GAS_DOSING/FL2.HALL/PRESSURE{{/code}} (%%)

687

(% style="color: rgb(0,0,0);" %)desc: set pressure in the gas attenuator (%%)

688

(% style="color: rgb(0,0,0);" %)units: mbar(%%)

689

\\

690

691

{{code language="none"}}/FL2/Beamlines/FL20/Shutter/open{{/code}}

692

//always saved (PBD2)//

693

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.SIS.FL2FS/FL20.SHUTTER/CH00.TD{{/code}}

694

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.SIS.FL2FS/FL20.SHUTTER{{/code}}

695

desc: BL Beamline Fast shutter state: 1 is open, 0 is closed ( for technical reasons there are 100 vales of this state saved ...)

units: none

{{code language="none"}}/FL2/Beamlines/Filter wheel/position wheel 1{{/code}}

700

//always saved (PBD2)//

701

DOOCS prop : {{code language="none"}}FLASH.FEL/FL20H.PH.MOTOR/MOTOR1.MOT3/FPOS{{/code}}

702

DAQ channel: FLASH.FEL/FL20H.PH.MOTOR/MOTOR1.MOT3/FPOS

703

desc: Position of the BL filter wheel 1 - to correlate with the filter material please look **[[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]**

units: degree

\\

/FL2/Beamlines/Filter wheel/position wheel 2

708

always saved (PBD2)

709

DOOCS prop : {{code language="none"}}FLASH.FEL/FL20H.PH.MOTOR/MOTOR2.MOT3/FPOS{{/code}}

710

DAQ channel: {{code language="none"}}FLASH.FEL/FL20H.PH.MOTOR/MOTOR2.MOT3/FPOS{{/code}}

711

desc: Position of the BL filter wheel 2 - to correlate with the filter material please look [[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]

units: degree

\\

NOTE: Aperture positions in the beamline as well as the positions of the beam steering mirrors are also saved. for more Info contact your local contact

717

718

[[Contents>>doc:||anchor="Contents"]]

\\

\\

==== Photon Diagnostics SASE ([[XGMD>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/gmd_intensity_and_position/index_eng.html||shape="rect"]] - FLASH2) ====

725

726

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}}

727

//always saved (PBD2)//

728

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL2.TUNNEL/PHOTONFLUX.UJ{{/code}}

729

DAQ channel:{{code language="none"}} FLASH.FEL/XGM.PHOTONFLUX/FL2.TUNNEL/PHOTONFLUX.UJ{{/code}}

730

desc : calibrated average ( ~~ 20 sec averaging time ) SASE Energy/pulse measured in the TUNNEL before the attenuator (ion current)

units : microJ

\\

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}}

736

//always saved (PBD2)//

737

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD{{/code}}

738

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD{{/code}}

739

desc : Energy per pulse measured in the Tunnel (in front of the gas attenuator and the apertures in the Hall) In addition measurement errors and beam position are included for EACH pulse in the pulse train !! (see below)

740

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision)** [[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

741

742

743

For every pulse in the pulse train the information is saved:

744

745

746

1. **Intensity per pulse** (a.u. (more or less µJ ))

747

1. Intensity per pulse (auxillary GMD) - not used

748

1. Position horizontal (mm, for a single pulse the position information may be very noisy - talk to your local contact)

749

1. Position vertical (mm, for a single pulse the position information may be very noisy - talk to your local contact)

750

1. **Intensity per pulse sigma** (a.u. (more or less µJ ), (% style="color: rgb(0,0,0);" %)This parameter gives an indication of the error of the measurement of the pulse energy. This takes signal to noise, detector resolution, uncertainties in crossection etc into account. (it is NOT the measurement of the statistical fluctuation of the SASE pulses)(%%))

751

1. Position horizontal sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

752

1. Position vertical sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

753

1. Combined warning and error flags

754

755

The pulse energy and the error are plotted for the first bunch of the pulse trains saved in this

file

[[image:attach:image2021-2-9_10-51-6.png||height="250"]]

\\

\\

All values for the GMD are also available for the** HALL GMD **which is located in the experimental hall down stream the gas attenuator. If the attenuator is on the ratio between Hall and Tunnel signal shows the attenuation. **BUT NOTE** that the filter unit and the Aperture 4 are downstream the GMD. So if filters and aperture are used this influence is NOT measured by the GMD hall !

\\

Besides pulse energy the GMD also provides information about the beam position

\\

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Average Beam position/position tunnel horizontal{{/code}}

775

//always saved (PBD2)//

776

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IX.POS{{/code}}

777

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IX.POS{{/code}}

778

desc : the Average ( ~~ 20 sec averaging time ) Beam position of the photon Beam determined by the GMD (tunnel, x=horizontal)

units : mm

\\

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Average Beam position/position tunnel vertical{{/code}}

784

//always saved (PBD2)//

785

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IY.POS{{/code}}

786

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IY.POS{{/code}}

787

desc : the Average ( ~~ 20 sec averaging time ) Beam position of the photon Beam determined by the GMD (tunnel, x=horizontal)

units : mm

\\

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position tunnel x

793

always saved (PBD2)

794

DOOCS prop : FLASH.FEL/XGM.BPM/FL2.HALL/X.TD

795

DAQ channel: FLASH.FEL/XGM.BPM/FL2.HALL:2

796

desc: Besides the well calibrated averaged beam position information there is also the option to measure the beam position on a single bunch level. HOWEVER this methide needs a perfectly adjusted signal level (talk to your local contact !!) and also then the signal to noise is rather small and one needs some averaging ... BUT with this option one can determine if there was a spatial slope on a burst (say forst bunches were lower than the last ones or so ...)

797

units : mm

798

799

(x=horizontal, y = vertial)

800

801

again the same parameter set is available for the **HALL GMD**

\\

\\

==== Photon Diagnostics OPIS[[ >>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/opis_spectrometer/index_eng.html||shape="rect"]](FLASH2) ====

808

809

for more info see:** [[ OPIS>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/opis_spectrometer/index_eng.html||shape="rect"]]**

810

811

(The OPIS hall is not installed yet ...)

\\

{{code language="none"}}/FL2/Photon Diagnostic/Wavelength/OPIS tunnel/Processed/mean photon energy{{/code}}

816

// saved opon request (PBD2)//

817

DOOCS prop : {{code language="none"}}FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL042{{/code}}

818

DAQ channel:{{code language="none"}} FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL042{{/code}}

819

desc : mean photon energy ( ~~ 1 sec averaging time ) measured in the TUNNEL for a specific bunch out of the bunch train (via photoelectron spectroscopy)

units : eV

\\

{{code language="none"}}/FL2/Photon Diagnostic/Wavelength/OPIS tunnel/Processed/mean wavelength{{/code}}

825

// saved opon request (PBD2)//

826

DOOCS prop : {{code language="none"}}FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL040{{/code}}

827

DAQ channel:{{code language="none"}} FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL040{{/code}}

828

desc : mean wavelength ( ~~ 1 sec averaging time ) measured in the TUNNEL for a specific bunch out of the bunch train (via photoelectron spectroscopy)

units : nm

\\

{{code language="none"}}/FL2/Photon Diagnostic/Wavelength/OPIS tunnel/Processed/number of analyzed bunch (in older version this can be found in OPIS tunnel/Expert stuff/General operation parameters/){{/code}}

834

// saved opon request (PBD2)//

835

DOOCS prop : {{code language="none"}}FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL060{{/code}}

836

DAQ channel:{{code language="none"}} FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL060{{/code}}

837

desc : The bunch number of the bunch used for the wavelength calculation

units :

\\

If Opis is running typically on the the averaged data is saved. For several experiments it may make sense to save the information for each single bunch. This is up to now done by saving the complete ADC trace of the TOF setup. This is a huge amount of data and needs processing. This has to be performed after the beamtime in close contact to [[Markus Braune>>mailto:markus.braune@desy.de||shape="rect"]] ( responsible for [[OPIS>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/opis_spectrometer/index_eng.html||shape="rect"]])

\\

In case OPIS was not operating there is still information about the **set wavelength** for the undulators (see below) which may differ by up to 5 % from the actual wavelength due to different settings in the FEL ...

\\

\\

==== Electron Beam properties (FLASH2) ====

853

854

===== bunch charge =====

855

856

{{code language="none"}}/FL2/Electron Diagnostic/Bunch charge/after undulator{{/code}}

857

//always saved (PBD2)//

858

DOOCS prop : {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN/CHARGE.FLASH2{{/code}}

859

DAQ channel: {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN/CHARGE.FLASH2{{/code}}

860

desc: electron bunch charge FLASH2 (average value for each bunchtrain).

units: nC

\\

===== electron bunch energy =====

866

867

{{code language="none"}}/FL2/Electron Diagnostic/Electron energy/energy of first bunch/behind undulators{{/code}}

868

//always saved (PBD2)//

869

DOOCS prop : {{code language="none"}}FLASH.DIAG/BEAM_ENERGY_MEASUREMENT/FL2XTDS/ENERGY.FLASH2{{/code}}

870

DAQ channel: (% style="color: rgb(94,108,132);" %)TTF2.DAQ/PBD2.BEAM.ENERGY.MEAS.ML.COPY/FL2XTDS.ENERGY.FLASH2{{code language="none"}}{{/code}}(%%)

871

desc: electron bunch energy measured behind the undulator. Data is saved with 10 Hz - BUT (for computation reasons) only the energy of the FIRST bunch is recorded. The data is also available for (% style="color: rgb(94,108,132);" %)extraction and septum in the beginning of FLASH2

872

873

(% style="letter-spacing: 0.0px;" %)units: (% class="twikiNewLink" %)MeV

\\

(% style="color: rgb(94,108,132);font-weight: 600;letter-spacing: 0.0px;" %)

878

undulator settings

879

880

{{code language="none"}}/FL2/Electron Diagnostic/Undulator setting/set wavelength{{/code}}

881

//always saved (PBD2)//

882

DOOCS prop : {{code language="none"}}TTF2.FEEDBACK/FL2.WAVELENGTHCONTROL/FLASH2/WAVELENGTH{{/code}}

883

DAQ channel: {{code language="none"}}TTF2.FEEDBACK/FL2.WAVELENGTHCONTROL/FLASH2/WAVELENGTH{{/code}}

884

desc: Set value for the anticipated wavelength . This parameter is used to set the undulator gap. It may however deviate from the actual wavelength by several % ...

885

units: nm

886

887

{{code language="none"}}/FL2/Electron Diagnostic/Undulator setting/SASE14 gap{{/code}}

888

//always saved (PBD2)//

889

DOOCS prop : {{code language="none"}}FLASH.UTIL/FL2.UND.MOTOR/FL2SASE14/GAP{{/code}}

890

DAQ channel: {{code language="none"}}FLASH.UTIL/FL2.UND.MOTOR/FL2SASE14/GAP{{/code}}

891

desc: gap value of the undulators. This can be used to follow up how many undulators were closed and if there was a taper

892

units: mm

893

894

The gap values are saved for all 12 undulators (Nr 3 to 14). Undulator 14 is the one closest to the experimental hall.

=====

arrival time =====

{{code language="none"}}/FL2/Electron Diagnostic/BAM/8FL2XTDS/electron bunch arrival time (low charge){{/code}}

900

//always saved (PBD2)//

901

DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/8FL2XTDS/LOW_CHARGE_ARRIVAL_TIME{{/code}}

902

DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/8FL2XTDS.LOW_CHARGE_ARRIVAL_TIME{{/code}}

903

desc: Electron bunch arrival time measured with the BAM after the FLASH2 undulator (pulse resolved data)

904

units: ps (bigger numbers indicate later arrivaltime of the electrons)

905

906

**FL1**{{code language="none"}}//Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}

907

//always saved (PBD2)//

908

DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}

909

DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}}

910

desc: Electron bunch arrival time measured with the BAM in the accelerator (pulse resolved data)

911

units: ps (bigger numbers indicate later arrivaltime of the electrons)

\\

* The BAM 4DBC3 measures the arrivaltime of** FLASH 1 and FLASH2** in the same data set (thus also sorted in at /FL1/ !).

917

* The BAM 8FL2XTDS measures only for FLASH2 BUT has the same data structure as the other BAMS ... thus there are also (random) values in in the FLASH1 time slot

918

** Structure: The first values are for FLASH1 bunches. After a gap of about 70 micros ( 70 colums) with as entry for the switching between FLASH 1 and 2 the values for the electrons used in FLASH2 start. The start time of FLASH2 is also recorded in the DAQ. FLASH1 start time is for historic reasons 700. thus if e.g. the start time of FLASH2 ( property name see below) is 1200 it means that FLASH starts at column 500 (1200-700) ... .In case of doubt ask your local contact

919

* [[Link a collection of papers related to the BAM and the analysis of pump-probe experiments >>doc:FLASHUSER.Additional helpful things.FLASH beamlines and instruments references.WebHome]]

920

* [[LINK to detailed infos from MSK (may only work inside DESY network~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://www.desy.de/~~mbock/pages/BAM_daq_channel_descriptions.html||shape="rect"]]

921

* a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]]

[[Contents>>doc:||anchor="Contents"]]

\\

==== Timing information, rep rate etc. (FLASH2) ====

930

931

===== start time of FLASH2 =====

932

933

{{code language="none"}}/FL2/Timing/start time flash2{{/code}}

934

//always saved (PBD2)//

935

DOOCS prop : {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/BUNCH_POSITION.2{{/code}}

936

DAQ channel: {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/BUNCH_POSITION.2{{/code}}

937

desc: The max 600 µs acceleration time of FLASH is devided between FLASH1 and FLASH2. This 600 µs window starts with FLASH1 (up to now) at a time"label" of 700 µs (for historic reasons). Thus the first bunch of FLASH 1 comes at "700" and the last possibel bunch comes at 1300 (700+600). After FLASH1 train is over ther is a about 70µs switching time with no bunches. Then comes the first FLASH2 bunch. Thus if e.g. the start time of FLASH2 is 1200 it means that FLASH2 starts at column 500 (1200-700) in the HDF5 files. (However for yet unknown reasons this may change by 2-3 colums ...)

938

units: µs

939

940

===== bunch repetition rate =====

941

942

{{code language="none"}}/FL2/Timing/repetition rate{{/code}}

943

//always saved (PBD2)//

944

DOOCS prop : {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/REP_RATE_KHZ.2{{/code}}

945

DAQ channel: {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/REP_RATE_KHZ.2{{/code}}

946

desc: repetition rate of the bunches / pulses within the burst (FLASH2)

947

units: kHz

948

949

===== actual number of pulses =====

950

951

{{code language="none"}}/FL1/Timing/actual number of bunches{{/code}}

952

//always saved (PBD2)//

953

DOOCS prop : {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/3GUN/NUMBEROFBUNCHES.FLASH2{{/code}}

954

DAQ channel: {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/3GUN/NUMBEROFBUNCHES.FLASH2{{/code}}

955

desc: Number of bunches measured BEHIND the undulator. If pulses are used for diagnostic of the protection system of the accelerator limits the number of bunches to be accelerated this is the actual number that created XUV radiation.The number is calculated by the DAQ middle layer server, (FLASH2)

units:

\\

===== actual pulse pattern recorded after the undulator =====

960

961

{{code language="none"}}/FL1/Timing/Bunch pattern/pattern after undulator{{/code}}

962

//always saved (PBD2)//

963

DOOCS prop : {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN.PULSEPATTERN{{/code}}

964

DAQ channel: {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN.PULSEPATTERN{{/code}}

965

desc: The bunch pattern as function of time in a burst recorded by toroide diagnostic BEHIND the undulator. (FLASH2)

units:

\\

===== Train ID =====

{{code language="none"}}/Timing/train ID{{/code}}

972

//always saved (PBD2)//

973

DOOCS prop : {{code language="none"}}none{{/code}}

974

DAQ channel: {{code language="none"}}none{{/code}}

975

desc: Each 10 Hz burst has its unique train ID. For the HDF5 dataset the ID is the same for all parameters with the same index (note camera images may be shifted by 1 ID - talk to the experts !)

units:

\\

===== Train time =====

980

981

//always saved (PBD2)

982

//{{code language="none"}}/Timing/train time{{/code}}

983

desc:Local time as array of day, hour, minute, second, and centisecond. This dataset is meant for visualisation purposes only. For correlations use the train ID or the Unix time of the time stamp

units: d h min s cs

\\

{{code language="none"}}/Timing/time stamp{{/code}}

988

989

//always saved (PBD2)//

990

desc: first column: Local time in unix time. To get day, hour, minute, second you can use unix: e.g. date ~-~-date='@1553617729' or matlab, python etc

991

second column: microseconds

992

third column: Train ID of FLASH

993

\\

994

995

[[Contents>>doc:||anchor="Contents"]]

\\

==== User Data (FLASH2) ====

1000

1001

The data saved specifically for detectors at an experiment will show up in /Experiment/ there is a large number of options for cameras or monitoring pslow properties (motor positons etc) for user experiments. For details please ask your local contact.

1002

1003

NOTE: If parameters for an experiment are included on short notice the correct naming in the HDF5 may not be in time and the data will show up in /uncategorized/ with the DOOCS names

1004

1005

The most common and permanently installed device used by experiment are our ADCs:

===== GHz ADCs =====

ADC traces of the (SPDevices 412) GHZ ADCs available for the users . More information about the ADCs can be found** [[here>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).MTCA ADCs.WebHome]]**

1010

//saved on DEMAND in the user DAQ//

1011

\\Up to now there are 4 channels available at FL24

1012

\\\\{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH00/TD{{/code}}

1013

{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH01/TD{{/code}}

1014

\\{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH02/TD{{/code}}{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH03/TD{{/code}}

\\

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.FL2EXP1/FL2EXP1.CH00/CH00.TD or CH00.DAQ.TD{{/code}}

1019

here the {{code language="none"}}CH00.TD{{/code}} is the full ADC trace as it is sampled ( typically several 100.000 samples per pulse train) while the {{code language="none"}}CH00.DAQ.TD{{/code}} trace only has the number of samples which are sent to the DAQ OR if //grouping// is activated the {{code language="none"}}CH00.DAQ.TD{{/code}} conatins only the grouped spectra. To read the ADC trace with an online analysis program the {{code language="none"}}CH00.DAQ.TD{{/code}} is used preferablly.

1020

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.FL2EXP1/FL2EXP1.CH00{{/code}}

1021

1022

In addition there are also additional parameters saved like:

1023

1024

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

1025

* {{code language="none"}}number of samples{{/code}}: total number of samoles recorded for each 10 Hz trigger

1026

* {{code language="none"}}error (ADC):{{/code}} 0 indicates that there was no error

1027

* {{code language="none"}}/CH0-CH3/offset{{/code}}: To use the full dynamic range of the ADC one can shift the base line . This offset is saved here.

===== MHz ADCs =====

similar to the GHz ADCs the MHz ADCs are saved with HDF5 names like:

1032

{{code language="none"}}/FL2/Experiment/MTCA-EXP1/SIS8300 100MHz ADC/CH2/TD{{/code}}

1033

DOOCS prop : FLASH.FEL/ADC.SIS.FL2EXP1/FL2EXP1.CH02/CH00.TD

1034

DAQ channel: : FLASH.FEL/ADC.SIS.FL2EXP1/FL2EXP1.CH02

1035

1036

In addition there are also additional parameters saved like:

1037

1038

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

1039

* {{code language="none"}}number of samples{{/code}}: total number of samoles recorded for each 10 Hz trigger

1040

1041

[[Contents>>doc:||anchor="Contents"]]

\\

\\

==== Pump Probe Laser (FLASH2) ====

1048

1049

There may be more information available from the "Laser DAQ". laese contact your Laser Local Contact.

1050

1051

1052

{{code language="none"}}/FL2/Experiment/Pump probe laser/FL24/attenuator position{{/code}}//always saved (PBD2)//

1053

DOOCS prop : {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR1.FL24/FPOS{{/code}}

1054

DAQ channel: {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR1.FL24/FPOS{{/code}}

1055

desc: attenuation of the PPLaser in the FL24 hutch (rotation of a waveplate)

units : deg.

\\

{{code language="none"}}/FL2/Experiment/Pump probe laser/FL24/polarization position{{/code}}//always saved (PBD2)//

1062

DOOCS prop : {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR2.FL24/FPOS{{/code}}

1063

DAQ channel: {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR2.FL24/FPOS{{/code}}

1064

desc: attenuation of the PPLaser in the FL24 hutch (rotation of a waveplate)

units : deg.

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/laser delay readback{{/code}}

1070

//always saved (PBD2)//

1071

DOOCS prop : {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/FMC0.MD22.0.POSITION.RD{{/code}}

1072

DAQ channel: {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/FMC0.MD22.0.POSITION.RD{{/code}}

1073

desc: delay of the Pump probe laser - measured by the read back position of the motor. There is also the set value available ( upto now these values are only updating every 1-2 seconds. There is no fast encoder property as on FLASH1 available)

units : ps )

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/Synchronization/timing jitter RMS{{/code}}

1079

//always saved (PBD)//

1080

DOOCS prop : {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/CURRENT_INPUT_JITTER.RD{{/code}}

1081

DAQ channel: {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/CURRENT_INPUT_JITTER.RD{{/code}}

1082

desc: rms jitter of the fs-Oscillator

1083

units: fs

1084

1085

[[Contents>>doc:||anchor="Contents"]]

\\

=== "/uncategorized/" ===

1090

1091

If parameters for an experiment are included on short notice the correct naming in the HDF5 may not be in time and the data will show up in /uncategorized/ with their DOOCS names

\\

=== HDF5 structure revisions ===

1096

1097

Starting with Beamblock 4, August 2018, the hierarchy of the HDF group names have been adapted to reflect the new situation at FLASH. FLASH2 is operating for users quite some time now. Therefore, both accelerators appear equally in their respective HDF groups, namely "/FL1" and "/FL2". The root group of proper, by run organised HDF files have an attribute called "version". This version attribute has changed from "0.2.x" to "0.3.x". The changes in detail:

\\

* All FLASH1 related HDF groups moved to group "/FL1", i.e. a new prefix "/FL1" is added to their HDF path.

1102

* The ambigious term "pulse" has been replaced by "train" to refer to "pulse train". Most notably, the dataset "/Timing/pulse ID" has changed to "/Timing/train ID".

1103

* A number of inconsistent names have been streamlined. The relevant changes are listed in the following table.

\\

(% class="wrapped" %)

1108

|=(((

1109

earlier HDF path (vers. 0.2)

)))|=(((

is now (vers. 0.3)

)))

|(((

/Photon Diagnostic/GMD/Beam position/position BDA x

1115

)))|(((

1116

/FL1/Photon Diagnostic/GMD/Beam position/position BDA horizontal

1117

)))

1118

|(((

1119

/Photon Diagnostic/GMD/Beam position/position BDA y

1120

)))|(((

1121

/FL1/Photon Diagnostic/GMD/Beam position/position BDA vertical

1122

)))

1123

|(((

1124

/Photon Diagnostic/GMD/Beam position/position tunnel x

1125

)))|(((

1126

/FL1/Photon Diagnostic/GMD/Beam position/position tunnel horizontal

1127

)))

1128

|(((

1129

/Photon Diagnostic/GMD/Beam position/position tunnel y

1130

)))|(((

1131

/FL1/Photon Diagnostic/GMD/Beam position/position tunnel vertical

1132

)))

1133

|(((

1134

/Experiment/Pump probe laser/BPM/position x

1135

)))|(((

1136

/FL1/Experiment/Pump probe laser/BPM/position horizontal

1137

)))

1138

|(((

1139

/Experiment/Pump probe laser/BPM/position y

1140

)))|(((

1141

/FL1/Experiment/Pump probe laser/BPM/position vertical

1142

)))

1143

|(((

1144

/FL2/Photon Diagnostic/GMD/Beam position/Average/position hall horizontal

1145

)))|(((

1146

/FL2/Photon Diagnostic/GMD/Average beam position/position hall horizontal

1147

)))

1148

|(((

1149

/FL2/Photon Diagnostic/GMD/Beam position/Average/position hall vertical

1150

)))|(((

1151

/FL2/Photon Diagnostic/GMD/Average beam position/position hall vertical

1152

)))

1153

|(((

1154

/FL2/Photon Diagnostic/GMD/Beam position/Average/position tunnel horizontal

1155

)))|(((

1156

/FL2/Photon Diagnostic/GMD/Average beam position/position tunnel horizontal

1157

)))

1158

|(((

1159

/FL2/Photon Diagnostic/GMD/Beam position/Average/position tunnel vertical

1160

)))|(((

1161

/FL2/Photon Diagnostic/GMD/Average beam position/position tunnel vertical

1162

)))

1163

|(((

1164

/FL2/Photon Diagnostic/GMD/Average energy/hall

1165

)))|(((

1166

/FL2/Photon Diagnostic/GMD/Average energy/energy hall

1167

)))

1168

|(((

1169

/FL2/Photon Diagnostic/GMD/Average energy/hall (raw)

1170

)))|(((

1171

/FL2/Photon Diagnostic/GMD/Average energy/energy hall (raw)

1172

)))

1173

|(((

1174

/FL2/Photon Diagnostic/GMD/Average energy/tunnel

1175

)))|(((

1176

/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel

1177

)))

1178

|(((

1179

/FL2/Photon Diagnostic/GMD/Average energy/tunnel (raw)

1180

)))|(((

1181

/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel (raw)

1182

)))

1183

|(((

1184

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/hall x

1185

)))|(((

1186

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position hall horizontal

1187

)))

1188

|(((

1189

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/hall y

1190

)))|(((

1191

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position hall vertical

1192

)))

1193

|(((

1194

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/tunnel x

1195

)))|(((

1196

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position tunnel horizontal

1197

)))

1198

|(((

1199

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/tunnel y

1200

)))|(((

1201

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position tunnel vertical

)))

\\

[[Contents>>doc:||anchor="Contents"]]

\\

Wiki source code of The FLASH HDF5 structure