Changes for page The FLASH HDF5 structure

Last modified by sndueste on 2025/02/06 10:55
From version 56.1
edited by sndueste
on 2022/09/07 09:38
Change comment: There is no comment for this version
To version 57.1
edited by sndueste
on 2022/09/07 09:50
Change comment: There is no comment for this version

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... ... @@ -416,8 +416,26 @@
416 416  units: nC
417 417  
418 418  =====
419 -arrival time =====
419 +arrival time (BAM) =====
420 420  
421 +{{info title="BAM information: updates 2022"}}
422 +* The data format of the BAM has been completely altered in the 2022 shutdown
423 +* before 2022 BAMs were always saving the arrival time information for each 1µs bucked regardless if there were electrons in the accelerator or not. IN addition the arrival times for  FL1 and FL2 were saved in the same parameter ...
424 +* THIS is now different. there are new parameters for pulses that go to FL1 and to FL2 (in detail: first time slot of the accelerator and second)
425 +* There has been also a renaming  (and relocation) of the BAMs.
426 +** acc:  4DBC3 → FL0.DBC2
427 +** FL1: 1SFELC →  FL1.SFELC
428 +** FL2: FL2XTDS → (% style="color: rgb(23,43,77);" %)FL2.SEED5
429 +* for more Info: [[LINK to detailed infos from MSK>>url:https://confluence.desy.de/display/SDiagPublic/BAM+Data+Structure||shape="rect"]]
430 +* [[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]]
431 +* a recent  [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]]
432 +{{/info}}
433 +
434 +\\
435 +
436 +{{expand title="Discontinued BAM format (used until end 2021)"}}
437 +(% style="color: rgb(0,0,0);" %)**Discontinued BAM data recording **
438 +
421 421  {{code language="none"}}/FL1/Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}
422 422  //always saved (PBD)//
423 423  DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}
... ... @@ -431,7 +431,26 @@
431 431  DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/1SFELC.LOW_CHARGE_ARRIVAL_TIME{{/code}}
432 432  desc: Electron bunch arrival time measured with the BAM  before the undulator (pulse resolved data). This one was newly installed in 2020.
433 433  units: ps (bigger numbers indicate later arrivaltime of the electrons)
452 +{{/expand}}
434 434  
454 +\\
455 +
456 +{{code language="none"}}/FL1/Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}
457 +//always saved (PBD)//
458 +DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}
459 +DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}}
460 +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).
461 +units: ps (bigger numbers indicate later arrivaltime of the electrons)
462 +
463 +{{code language="none"}}/FL1/Electron Diagnostic/BAM/1SFELC/electron bunch arrival time (low charge){{/code}}
464 +//always saved (PBD)//
465 +DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/1SFELC/LOW_CHARGE_ARRIVAL_TIME{{/code}}
466 +DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/1SFELC.LOW_CHARGE_ARRIVAL_TIME{{/code}}
467 +desc: Electron bunch arrival time measured with the BAM  before the undulator (pulse resolved data). This one was newly installed in 2020.
468 +units: ps (bigger numbers indicate later arrivaltime of the electrons)
469 +
470 +\\
471 +
435 435  {{info title="BAM hints"}}
436 436  * besides the arrivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved.In case of doubt ask your local contact
437 437  * [[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]]