Data analysis¶

general¶

"How to read FADC250 scalers" https://logbooks.jlab.org/entry/3808745

"scaler file of run 158" https://logbooks.jlab.org/entry/3808730

SPE https://logbooks.jlab.org/entry/3807172

log search with keyword "solid" https://logbooks.jlab.org/search/site/SoLID?f%5B0%5D=im_field_logbook%3A81

file¶

file location /work/solid/cc_pro/beamtest

run 160: production run, 30uA on PolHe3 target, fadc mode 1 single every 4ns, large angle, CO2

event by event output have the entries as follows
ec_peak,ec_pos,ec_nhits,ec_sum,sc_peak,sc_pos,sc_nhits,sc_sum,Cer11_1_peak,Cer11_2_peak,Cer11_3_peak,Cer11_4_peak,Cer11_5_peak,......,ec_ch,sc_ch

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run160_0_all.csv (entries 990243)

ec_peak: the peak height of the channel with max peak height, but about 90% of the events have only one channel fired, so it is close to the sum.
ec_pos: the peak sample number in the unit of 4ns
ec_nhits: number of hits
ec_sum: sum of all channels of peak height
sc_* : similar things for SC2 which is the plane behind Cerenkov tube
Cer11_1_peak: peak height of Cer11 quad1
Cer11_5_peak: peak height of Cer11 sum
ec_ch: the channel channel with max peak height
sc_ch: the channel channel with max peak height

cer_pos is relative to ec_pos, ec_pos and sc_pos are relative to trigger.

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run160_1_all.csv (entries 12085327)

ec_peak: with timing cut
ec_pos: with timing cut
ec_nhits: with timing cut
ec_sum: with timing cut
sc_* : with timing cut
Cer11_1_peak: Number of p.e. of Cer11 quad1
Cer11_5_peak: Number of p.e. of Cer11 quad1
ec_ch: with timing cut
sc_ch: with timing cut

cer_pos is relative to ec_pos, ec_pos and sc_pos are relative to trigger.
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