Page tree

Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel
always saved (PBD)
DOOCS prop : TTF2.DAQ/PHFLUX/OUT34/VAL
DAQ channel: PBD.PHFLUX/TUNNEL.ENERGYPULSE.USER
desc :Energy per pulse Tunnel (from e-) - the values are set to "0" if there was no SASE beam in the FEL
units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) see here for help

/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel (raw)
always saved (PBD)
DOOCS prop : TTF2.DAQ/PHFLUX/OUT14/VAL
DAQ channel: PBD.PHFLUX/TUNNEL.ENERGYPULSE.FF
desc :Energy per pulse Tunnel (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise
units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) see here for help

/FL1/Photon Diagnostic/GMD/Average energy/energy BDA
always saved (PBD)
DOOCS prop : TTF2.DAQ/PHFLUX/OUT05/VAL
DAQ channel: PBD.PHFLUX/BDA.ENPULSEIC
desc : calibrated average SASE Energy/pulse measured in the BDA (in the experimental hall) after the attenuator (ion current)
units : microJ

/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA
always saved (PBD)
DOOCS prop : TTF2.DAQ/PHFLUX/OUT35/VAL
DAQ channel: PBD.PHFLUX/BDA.ENERGYPULSE.USER
desc :Energy per pulse BDA (from e-) - the values are set to "0" if there was no SASE beam in the FEL
units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) see here for help

/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA (raw)
always saved (PBD)
DOOCS prop : TTF2.DAQ/PHFLUX/OUT15/VAL
DAQ channel: PBD.PHFLUX/BDA.ENERGYPULSE.FF
desc :Energy per pulse BDA (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise
units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) see here for help

/FL1/Photon Diagnostic/GMD/Beam position/position BDA horizontal
always saved (PBD)
DOOCS prop : FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS
DAQ channel: FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS
desc :Beam position of the photon Beam determined by the GMD (BDA, x=horizontal)
units : mm

...

/FL2/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel
always saved (PBD2)
DOOCS prop : FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD
DAQ channel: FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD
desc : Energy per pulse measured in the Tunnel  (in fromt of the gas attenuator and the apertures in the Hall)
units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) see here for help



/FL2/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel uncertainty (sigma)
always saved (PBD2)
DOOCS prop : FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.SIGMA.TD
DAQ channel: FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL:4
desc :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)
units : a.u. (more or less µJ - related to the value of the pulse energy )

...

/FL1/Experiment/Pump probe laser/Synchronization/timing jitter RMS
always saved (PBD)
DOOCS prop : FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/CURRENT_INPUT_JITTER.RD
DAQ channel: FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/CURRENT_INPUT_JITTER.RD
desc: rms jitter of the fs-Oscillator
units: fs

top


"/uncategorized/"

 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

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:

...