Difference between revisions of "FA125 chip occupancy"
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From the first 1000 events in run 11663, 50 um diamond, PARA, 1345A solenoid, 80 nA beam. Plotted number of hits in each of the chips per event, channels 0-5 are on one chip, 6-11 are on the next, etc, eg event 21 has only 1 hit on roc25 slot3, and that is for the 2nd chip, so the entry in the histogram for roc25slot3 is 1. The crates are plotted separately. | From the first 1000 events in run 11663, 50 um diamond, PARA, 1345A solenoid, 80 nA beam. Plotted number of hits in each of the chips per event, channels 0-5 are on one chip, 6-11 are on the next, etc, eg event 21 has only 1 hit on roc25 slot3, and that is for the 2nd chip, so the entry in the histogram for roc25slot3 is 1. The crates are plotted separately. | ||
| − | At present the plots slightly over-represent the zeros (by 15/13) as they include zeros for the two unused slots. | + | At present the run 11663 plots slightly over-represent the zeros (by 15/13) as they include zeros for the two unused slots. |
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Revision as of 11:03, 11 August 2016
Run 11663, 80nA
From the first 1000 events in run 11663, 50 um diamond, PARA, 1345A solenoid, 80 nA beam. Plotted number of hits in each of the chips per event, channels 0-5 are on one chip, 6-11 are on the next, etc, eg event 21 has only 1 hit on roc25 slot3, and that is for the 2nd chip, so the entry in the histogram for roc25slot3 is 1. The crates are plotted separately.
At present the run 11663 plots slightly over-represent the zeros (by 15/13) as they include zeros for the two unused slots.
CDC total 720000 zero 678645 nonzero 41355 zero/total 94.3 % count 0 / total 94.25625000 % count 1 / total 3.78458333 % count 2 / total 1.20347222 % count 3 / total 0.52069444 % count 4 / total 0.14902778 % count 5 / total 0.05250000 % count 6 / total 0.03347222 % FDC total 1800000 zero 1704945 nonzero 95055 zero/total 94.7 % count 0 / total 94.71916667 % count 1 / total 1.14705556 % count 2 / total 1.13011111 % count 3 / total 1.11655556 % count 4 / total 1.05961111 % count 5 / total 0.52822222 % count 6 / total 0.29927778 %
Run 11437, 212nA
From the first 1000 events in run 11437 file 001, 50 um diamond, PERP, 1200A solenoid, 212 nA beam.
(Beni was right)
Average occupancy is 2% (CDC) and 3% (FDC), details below.
Chip occupancy calculation for CDC: Data file contains 624,000 entries, one for each of 4 crates x 13 boards x 12 chips per board x 1000 events. Total # hits possible = 6 * 624,000. ((1*26912)+(2*9258)+(3*3968)+(4*1067)+(5*324)+(6*210))/(6*624000.0) = 1.72e-02 so this is an average of 1.7% occupancy.
CDC total reports: 624000 zero hits: 582261 nonzero hits: 41739 zero/total 93.31 % number of chips reporting 0 hits (582261) / total reports (624000) 93.31 % number of chips reporting 1 hits (26912) / total reports (624000) 4.31 % number of chips reporting 2 hits (9258) / total reports (624000) 1.48 % number of chips reporting 3 hits (3968) / total reports (624000) 0.64 % number of chips reporting 4 hits (1067) / total reports (624000) 0.17 % number of chips reporting 5 hits (324) / total reports (624000) 0.05 % number of chips reporting 6 hits (210) / total reports (624000) 0.03 % 0 hits x 582261 reports = 0 1 hits x 26912 reports = 26912 2 hits x 9258 reports = 18516 3 hits x 3968 reports = 11904 4 hits x 1067 reports = 4268 5 hits x 324 reports = 1620 6 hits x 210 reports = 1260 Total of hits x reports = 64480 Total hits x reports possible = 6 x 624000 = 3744000 Occupancy: total hits x reports / total possible = 1.72 %
FDC total reports: 1560000 zero hits: 1450179 nonzero hits: 109821 zero/total 92.96 % number of chips reporting 0 hits (1450179) / total reports (1560000) 92.96 % number of chips reporting 1 hits (24417) / total reports (1560000) 1.57 % number of chips reporting 2 hits (23508) / total reports (1560000) 1.51 % number of chips reporting 3 hits (22542) / total reports (1560000) 1.45 % number of chips reporting 4 hits (21734) / total reports (1560000) 1.39 % number of chips reporting 5 hits (10848) / total reports (1560000) 0.70 % number of chips reporting 6 hits (6772) / total reports (1560000) 0.43 % 0 hits x 1450179 reports = 0 1 hits x 24417 reports = 24417 2 hits x 23508 reports = 47016 3 hits x 22542 reports = 67626 4 hits x 21734 reports = 86936 5 hits x 10848 reports = 54240 6 hits x 6772 reports = 40632 Total of hits x reports = 320867 Total hits x reports possible = 6 x 1560000 = 9360000 Occupancy: total hits x reports / total possible = 3.43 %
