EventRootFile

Need to document the event file format here.

This file has some directories:

• timing - has the following histograms
  • tdiff - Time difference to first trigger
  • tdiff_clean - Time difference to first trigger without noise
  • pulser_freq - Frequency of pulser in FEBEX DAQ as a function of time
  • pulser_period - Period of pulser in FEBEX DAQ
  • pulser_tdiff - Time difference of pulser 0 to all other pulsers in FEBEX DAQ
  • ebis_freq - Frequency of EBIS events as a function of time
  • ebis_period - Period of EBIS events
  • t1_freq - Frequency of T1 events (p+ on ISOLDE target) as a function of time
  • t1_period - Period of T1 events (p+ on ISOLDE target)
  • sc_freq - Frequency of SuperCycle events as a function of time
  • sc_period - Period of SuperCycle events
• miniball
  • a histogram mb_td_core_seg -Time difference between core and segment in same crystal
  • a histogram mb_td_core_core - Time difference between two cores in same cluster
  • a directory for each cluster i = 0 to 7 with histograms for each crystal j (0 to 2):
    
    • mb_en_core_seg_i_j - Gamma-ray spectrum from cluster i core j, gated by segment (multiplicity = 1 only)
    • mb_en_core_seg_ i_j ebis_on - Gamma-ray spectrum from cluster i core j, gated by segment (multiplicity = 1 only) gated by EBIS time (1.5 ms)
• cd - has the following histograms
  • cd_pen_id_i_j - CD p-side energy for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_nen_id_i_j - CD n-side energy for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pn_1v1_i_j - CD p-side vs n-side energy, multiplicity 1v1for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pn_1v2_i_j - CD p-side vs n-side energy, multiplicity 1v2for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pn_2v1_i_j - CD p-side vs n-side energy, multiplicity 2v1for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pn_2v2_i_j - CD p-side vs n-side energy, multiplicity 2v2for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pn_td_i_j - CD p-side vs n-side time difference for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pp_td_i_j - CD p-side vs p-side time difference for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_nn_td_i_j - CD n-side vs n-side time difference for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_ppad_td_i_j - CD p-side vs pad time difference for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_pn_mult_i_j - CD p-side vs n-side multiplicity for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
  • cd_ppad_mult_i_j - CD vs Pad multiplicity for detector i = 0 (forward), 1 (backward), sector j = 0, 1, 2, 3
• ic - has the following histograms
  • ic_td - Time difference between signals in the ion chamber
  • ic_dE - Energy loss in first layer of ion chamber (gas)
  • ic_E - Energy in second layer of ion chamber (Si)
  • ic_dE_E - 2-D dE vs. E plot

and the event tree which contains:

• ebis - absolute EBIS pulse time
• t1 - absolute proton pulse time
• sc - absolute SuperCycle time
• laser - RILIS laser on (true) or off (false)
• gamma_event (without addback)
  • energy - energy in keV
  • seg_energy - energy in keV for the hit segment
  • time - timestamp of event
  • clu - cluster ID
  • cry - crystal ID
  • seg - segment ID
• gamma_ab_event (with addback)
  • energy - energy in keV
  • seg_energy - energy in keV for the hit segment
  • time - timestamp of event
  • clu - cluster ID
  • cry - crystal ID
  • seg - segment ID
• particle_event (CD)
  • penergy - p-side energy in keV
  • nenergy - n-side energy in keV
  • padenergy - pad energy in keV
  • ptime - p-side timestamp of event
  • ntime - n-side timestamp of event
  • rtime - pad timestamp of event
  • det - detector ID (=0 for forward CD)
  • sec - sector ID (0-3 for quadrants)
  • pstrip - p-side strip ID
  • nstrip - n-side strip ID
• bd_event (beam-dump detector)
  • energy - energy in keV
  • time - timestamp of event
  • det - detector ID
• spede_event (spede)
  • energy - energy in keV
  • time - timestamp of event
  • seg - segment ID within SPEDE
• ic_event (ionisation chamber)
  • energy - differential energy list
  • id - differential id list, i.e. dE = 0, E = 1, for example
  • detime - time stamp of gas event
  • etime - time stamp of silicon event