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Arrivaltime of the electrons for each bunch


saved Properties

A list with saved properties and their explanation can be found with the LINK to detailed infos from MSK


  • the relevant data is the Arrivaltime FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME


  • There are now (since March 2017) LOW and HIGH charge channels. for now the LOW_CHARGE Channel is the relavant one.


  • bigger numbers indicate later arrivaltime of the electrons


  • the arrivaltime sould be within -20 ps and +20 ps . otherwise there might be a problem ...


  • There is a BAM status parameter: FLASH.SDIAG/BAM/4DBC3/BAM_STATUS.1 (the 1 indicates FLASH1)
    • bit 0 (value: 1) = data is valid,
    • bit 1 (value: 2) = at least 1 bunch is present,
    • bit 2 (value: 4) = calibration is on,
    • bit 3 (value: 8) = internal feedback is on,
    • bit 4 (value: 16) = tuning mode is on






















Old VME SYSTEM (used before March 2017:


saved Properties


  • DOOCS prop :TTF2.SYNCH/BAM.SERVER/3DBC2/DAQ_CHANNEL
  • DOOCS prop :TTF2.SYNCH/BAM.SERVER/1UBC2/DAQ_CHANNEL
  • DOOCS prop :TTF2.SYNCH/BAM.SERVER/4DBC3/DAQ_CHANNEL (the position closest to the experiment. this is the reference value to use for sorting experiments)





Details of the channels:

%[28] DOOCS prop :TTF2.SYNCH/BAM.SERVER/4DBC3/DAQ_CHANNEL
DAQ channel:BAM.SERVER/4DBC3
desc :BAM ML server channel 4DBC3
units :Not set
# dims : 6
id : 0
name : ARRIVAL_TIME_SPEC
desc : arrival time spectrum (fine)
units : ps
# statistics values : [daq.stat_descr@11e6afe, daq.stat_descr@27b82, daq.stat_descr@fa9e11, daq.stat_descr@19f862f, daq.stat_descr@229c65, daq.stat_descr@49c8b4, daq.stat_descr@17bd44, daq.stat_descr@8acee5, daq.stat_descr@1154de7, daq.stat_descr@1ad95f8, daq.stat_descr@150e01b, daq.stat_descr@a920c7, daq.stat_descr@1a700bf, daq.stat_descr@1222daf, daq.stat_descr@e54a13, daq.stat_descr@1625717, daq.stat_descr@143df1b, daq.stat_descr@ec9052, daq.stat_descr@f6fe1e, daq.stat_descr@1a5a4b1] # : 0 name : ARRIVAL_TIME_JITTER desc : dT-RMS units : fs # : 1 name : AVERAGED_ARRIVAL_TIME desc : T-Mean units : ps # : 2 name : CALIB desc : Calibration fine units : fs/% # : 3 name : POS_ENCODER desc : Position encoder fine units : mm # : 4 name : AVERAGED_PHASE_ERROR desc : Injection phase units : deg # : 5 name : ARRIVAL_TIME_OFFSET desc : Arrival tim eoffset units : ps # : 6 name : BAM_ERROR desc : BAM error units : none # : 7 name : DO_CALIB desc : Is doing calibration units : none # : 8 name : DO_CALIB_FIT_B desc : b Value of Calibration Fit (y=a+bx) units : none # : 9 name : DO_CALIB_FIT_CHI2 desc : chi2 Value of Calibration Fit units : none # : 10 name : DO_CALIB_FIT_Q desc : Probability of correct Fit units : none # : 11 name : DO_CALIB_FIT_SIGB desc : sigb Value of Calibration Fit units : none # : 12 name : DO_CALIB_MIN_Q_OF_CHI2 desc : Minimal probability needed units : none # : 13 name : MOTOR_LINK_CORR desc : Link Motor Correction units : none # : 14 name : MOTOR_LINK_POS desc : Link Motor Position units : none # : 15 name : M_FEEDBACK_ON desc : Motor Feedback on (3 bits) units : none # : 16 name : RESOLUTION desc : Resolution (fine) units : fs # : 17 name : RESOLUTION_COARSE desc : Resolution (coarse) units : fs # : 18 name : ZERO_X_DEVIATION desc : Zero X Deviation (fine) units : ps # : 19 name : ZERO_X_DEVIATION_COARSE desc : Zero X Deviation (coarse) units : ps id : 1
name : ARRIVAL_TIME_C_SPEC
desc : arrival time spectrum (coarse)
units : ps
# statistics values : [daq.stat_descr@1df6569, daq.stat_descr@17afe97, daq.stat_descr@1e09966, daq.stat_descr@7704cf] # : 0 name : ARRIVAL_TIME_JITTER_COARSE desc : Arrival Time Jitter (coarse) units : fs # : 1 name : AVERAGED_ARRIVAL_TIME_COARSE desc : Averaged Arrival Time (coarse) units : ps # : 2 name : CALIB_COARSE desc : Calibration Constant (coarse) units : fs/% # : 3 name : POS_ENCODER_COARSE desc : Position Encoder Value (coarse) units : mm id : 2
name : LASER_AMP_SPEC
desc : laser amplitude (modulated pulses)
units : bunch
id : 3
name : LASER_AMP_C_SPEC
desc : laser amplitude coarse (modulated pulses)
units : bunch
id : 4
name : LASER_AMP_NOISE_SPEC
desc : Laser Amplitude Noise Spectrum (fine)
units : laser pulse num
# statistics values : [daq.stat_descr@1dce79d] # : 0 name : LASER_AMP_NOISE_RMS desc : Laser Amplitude Noise RMS (fine) units : % id : 5
name : LASER_AMP_C_NOISE_SPEC
desc : Laser Amplitude Noise Spectrum (coarse)
units : laser pulse num
# statistics values : [daq.stat_descr@1ea248f] # : 0 name : LASER_AMP_NOISE_RMS_COARSE desc : Laser Amplitude Noise RMS (coarse) units :

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