run run number n2_run refcell nitrogen run used for background subtraction for this run empty_run refcell empty run used for background subtraction for this run flag -1 = does not exist , 0 = junk , 1 = nonproduction use , 2 = good but... , 3 = perfect as far as we know num_file number of raw data files or (1 + number of file splits) runtype "pro" for production , "acc" for acceptance , "ela" for elastic , "pc" for pressure curve , "ped" for pedestal , "opt" for optics , "bs" for background studies sieve_slit denotes what kind of sieve slit was installed for this run: "none" , "thick" , "thick_short" , "thick_tall" , "thin" target_collimators denotes whether the target colimators were "OUT" or "IN" for this run start_time run start time from EPICS , use from_unixtime() to get a timestamp of the form "2006-07-29 16:54:26" end_time same except run end time period 1 or 2 nom_angle 6 or 9 cell "proteus" , "penelope" , "priapus" nom_ebeam nominal beam energy in GeV for qualitative purposes ebeam beam enegy in MeV for quantitative purposes ebeam_sigma std dev of beam energy in MeV (not always reliable) nom_pmom nominal central momentum setting for the right arm in MeV/c, for qualitative purposes pmom central momentum setting for right arm in MeV, for quantitative purposes pmom_sigma std dev of momentum setting in MeV septum septum current reading in Amps septum_sigma std dev of septum current reading in Amps septum_set septum current setting in Amps masstar mass of nucleus target in MeV (carbon , 3he , nitrogen) masstar_eff effective mass of target in MeV (usually neutron) nu energy loss for central hole in GeV q_2 4 momentum transer for central hole in GeV^2 W_target invariant mass of decay products using target mass in GeV W_neutron invariant mass of decay products using neutron mass in GeV dp_ela_pos relative location of elastic peak from target wrt momentum setting a_beam_curr hall A current in microAmps a_beam_curr_sig std dev in hall A current in microAmps c_beam_curr hall C current in microAmps c_beam_curr_sig std dev in hall C current in microAmps bpm_ax bpm A x pos in mm bpm_ax_sig std dev of bpm A x bpm_ay bpm A y bpm_ay_sig std dev bpm_bx bpm B x bpm_bx_sig std dev bpm_by bpm B y bpm_by_sig std dev bpm_tarx bpm x postion projected to target in mm bpm_tary bpm y postion projected to target in mm polbeam beam polarization corrected for bleedthrough bhwp beam halfwaveplate , IN or OUT target1 "pol3he" , "refcell" , "none" , or "carbon" target2 target angle if "pol3he" OR contents of "refcell" OR number of foils if "carbon" taraux1 refcell pressure recorded by hand taraux2 refcell pressure recorded by hand tarang target spin angle 0 , 180 , or 270 poltar target polarization (0 to 1) dentar "refcell" or "pol3he" density in amagats raster 0 for off and 1 for on, not reliable polbeam_sign sign of Moller polarization times (+1 for BHWP = OUT) or (-1 for BHWP = IN) poltar_sign sign of target polarization (-1 for 0 and 90 degrees) or (+1 for 180 and 270 degrees) ps1 ps factor ps2 " ps3 " ps4 " ps5 " ps6 " ps7 " ps8 " bcm3_pos bcm gain 3 charge for pos helicity bcm3_neg bcm gain 3 charge for neg helicity bcm3_non bcm gain 3 charge for non helicity bcm10_pos bcm gain 10 charge for pos helicity bcm10_neg bcm gain 10 charge for neg helicity bcm10_non bcm gain 10 charge for non helicity t1_accept_pos number of T1 triggers for pos helicity t1_accept_neg number of T1 triggers for neg helicity t1_accept_non number of T1 triggers for non helicity t2_accept_pos number of T2 triggers for pos helicity t2_accept_neg number of T2 triggers for neg helicity t2_accept_non number of T2 triggers for non helicity t1_livetime_pos T1 livetime for pos helicity t1_livetime_neg T1 livetime for neg helicity t1_livetime_non T1 livetime for non helicity t2_livetime_pos T2 livetime for pos helicity t2_livetime_neg T2 livetime for neg helicity t2_livetime_non T2 livetime for non helicity comments comments from various sources, a good place to look to see why a run was flagged a certan way vdc_flag vdc config flag needed for analyzer "low_momenta" , "mid_momenta" , "high_momenta" pid_flag pid config flag needed for analyzer