Changes for page The FLASH HDF5 structure

Last modified by sndueste on 2025/02/06 10:55
From version 58.1
edited by sndueste
on 2022/09/07 17:20
Change comment: There is no comment for this version
To version 56.1
edited by sndueste
on 2022/09/07 09:38
Change comment: There is no comment for this version

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... ... @@ -416,27 +416,8 @@
416 416  units: nC
417 417  
418 418  =====
419 -arrival time (BAM) =====
419 +arrival time =====
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 -* [[Info collection about the BAMs and how to use the BAM data>>url:https://confluence.desy.de/display/FLASHUSER/Info+collection+for+the+BAM||shape="rect"]]
431 -* [[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]]
432 -* a recent  [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]]
433 -{{/info}}
434 -
435 -\\
436 -
437 -{{expand title="Discontinued BAM format (used until end 2021)"}}
438 -(% style="color: rgb(0,0,0);" %)**Discontinued BAM data recording **
439 -
440 440  {{code language="none"}}/FL1/Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}
441 441  //always saved (PBD)//
442 442  DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}
... ... @@ -444,66 +444,13 @@
444 444  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).
445 445  units: ps (bigger numbers indicate later arrivaltime of the electrons)
446 446  
447 -\\
448 -
449 449  {{code language="none"}}/FL1/Electron Diagnostic/BAM/1SFELC/electron bunch arrival time (low charge){{/code}}
450 450  //always saved (PBD)//
451 451  DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/1SFELC/LOW_CHARGE_ARRIVAL_TIME{{/code}}
452 452  DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/1SFELC.LOW_CHARGE_ARRIVAL_TIME{{/code}}
453 453  desc: Electron bunch arrival time measured with the BAM  before the undulator (pulse resolved data). This one was newly installed in 2020.
454 -units: ps (bigger numbers indicate later arrival time of the electrons)
455 -{{/expand}}
433 +units: ps (bigger numbers indicate later arrivaltime of the electrons)
456 456  
457 -(% style="color: rgb(255,102,0);" %)DBC2/electron bunch arrival time{{code language="none"}}/FL1/Electron Diagnostic/BAM/{{/code}}(%%)
458 -//always saved (PBD)//
459 -DOOCS prop : FLASH.SDIAG/BAM/FL0.DBC2/ARRIVAL_TIME.absolute.SA1
460 -DAQ channel: (% style="color: rgb(255,102,0);" %)FLASH.SDIAG/BAM/FL0.DBC2/ARRIVAL_TIME.absolute.SA1 (%%)
461 -desc: Electron bunch arrival time measured with the BAM inside the accelerator (after bunch compressor 2) - It shows a very good correlation to the arrival time  of the XUV pulses in the experiment (see help).  The SA1 indicates the data is recorded for the first time slot at FLASh, typically used for FLASH1
462 -units: fs (bigger numbers (typically) indicate later arrival times of the electrons).
463 -
464 -\\
465 -
466 -(% style="color: rgb(255,102,0);" %)DBC2/error{{code language="none"}}/FL1/Electron Diagnostic/BAM/{{/code}}(%%)
467 -//always saved (PBD)//
468 -DOOCS prop : FLASH.SDIAG/BAM/FL0.DBC2/ARRIVAL_TIM(% style="color: rgb(0,0,0);" %)E.bamError(%%)
469 -DAQ channel: (% style="color: rgb(255,102,0);" %)FLASH.SDIAG/BAM/FL0.DBC2/ARRIVAL_TIME.BAMERROR(%%)
470 -desc: If the value is 0 , the BAM is working well. If it is non-zero there is a problem !!
471 -
472 -\\
473 -
474 -(% style="color: rgb(255,102,0);" %)DBC2/error{{code language="none"}}/FL1/Electron Diagnostic/BAM/{{/code}}(%%)
475 -//always saved (PBD)//
476 -DOOCS prop : FLASH.SDIAG/BAM/FL0.DBC2/ARRIVAL_TIM(% style="color: rgb(0,0,0);" %)E..bamStatus.//1//(%%)
477 -DAQ channel: (% style="color: rgb(255,102,0);" %)FLASH.SDIAG/BAM/FL0.DBC2/ARRIVAL_TIME.BAMSTATUS(%%)
478 -desc: (% style="letter-spacing: 0.0px;" %) status bit: 0 - data is valid; 1 - beam present; 2 - calibration ongoing; 3 - feedback enabled; 4 - feedback acting;  mostly check for bit 0 == 1 is sufficient
479 -
480 -\\
481 -
482 -(% style="color: rgb(23,43,77);" %)SFELC(% style="color: rgb(255,102,0);" %)/electron bunch arrival time{{code language="none"}}/FL1/Electron Diagnostic/BAM/{{/code}}(%%)
483 -//always saved (PBD)//
484 -DOOCS prop : FLASH.SDIAG/BAM/(% style="color: rgb(23,43,77);" %)FL1.SFELC(%%)/ARRIVAL_TIME.absolute.SA1
485 -DAQ channel: (% style="color: rgb(255,102,0);" %)FLASH.SDIAG/BAM/(% style="color: rgb(255, 102, 0); color: rgb(23, 43, 77)" %)FL1.SFELC(% style="color: rgb(255,102,0);" %)/ARRIVAL_TIME.absolute.SA1 (%%)
486 -desc: Electron bunch arrival time measured  with the BAM  before the undulator (pulse resolved data). This one was newly installed in 2020.  The SA1 indicates the data is recorded for the first time slot at FLASh, typically used for FLASH1
487 -units: fs (bigger numbers (typically) indicate later arrival times of the electrons).
488 -
489 -\\
490 -
491 -(% style="color: rgb(23,43,77);" %)SFELC(% style="color: rgb(255,102,0);" %)/error{{code language="none"}}/FL1/Electron Diagnostic/BAM/{{/code}}(%%)
492 -//always saved (PBD)//
493 -DOOCS prop : FLASH.SDIAG/BAM/(% style="color: rgb(23,43,77);" %)FL1.SFELC(%%)/ARRIVAL_TIM(% style="color: rgb(0,0,0);" %)E.bamError(%%)
494 -DAQ channel: (% style="color: rgb(255,102,0);" %)FLASH.SDIAG/BAM/(% style="color: rgb(255, 102, 0); color: rgb(23, 43, 77)" %)FL1.SFELC(% style="color: rgb(255,102,0);" %)/ARRIVAL_TIME.BAMERROR(%%)
495 -desc: If the value is 0 , the BAM is working well. If it is non-zero there is a problem !!
496 -
497 -\\
498 -
499 -(% style="color: rgb(23,43,77);" %)SFELC(% style="color: rgb(255,102,0);" %)/error{{code language="none"}}/FL1/Electron Diagnostic/BAM/{{/code}}(%%)
500 -//always saved (PBD)//
501 -DOOCS prop : FLASH.SDIAG/BAM/(% style="color: rgb(23,43,77);" %)FL1.SFELC(%%)/ARRIVAL_TIM(% style="color: rgb(0,0,0);" %)E..bamStatus.//1//(%%)
502 -DAQ channel: (% style="color: rgb(255,102,0);" %)FLASH.SDIAG/BAM/(% style="color: rgb(255, 102, 0); color: rgb(23, 43, 77)" %)FL1.SFELC(% style="color: rgb(255,102,0);" %)/ARRIVAL_TIME.BAMSTATUS(%%)
503 -desc: (% style="" %) status bit: 0 - data is valid; 1 - beam present; 2 - calibration ongoing; 3 - feedback enabled; 4 - feedback acting;  mostly check for bit 0 == 1 is sufficient
504 -
505 -\\
506 -
507 507  {{info title="BAM hints"}}
508 508  * besides the arrivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved.In case of doubt ask your local contact
509 509  * [[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]]