GLAST LAT Project EM Tests, September 22, 2003

L. Wai 1

08:00 Meeting08:00 Meeting

Schedule Meeting 08:30 Tuesday morning to determine if new version TEM/TEM-PS should

be tested on EM system (as early as Tuesday) Testing/Data Taking performed 12-hrs/day since EM system integration on Thursday Shifts summary:

Thursday 8pm-2am

Friday 8am-4pm

Friday 4pm-8pm

Saturday 8am-4pm

Saturday 4pm-8pm

Sunday 8am-4pm

Sunday 4pm-8pm

Hiro, Johann

Larry, Xin, Berrie, Johann

Larry, Elliott, Johann

Hiro, Xin, Berrie, Elliott

Larry, Brian, Hiro, Xin, Elliott

Hiro, Johann

Jim, Gary, Johann

TKR LPT, TKR Occupancy, Noise, Gain

CAL CPT, Online-Offline data stream and analysis tests

CAL CPT

Start data taking:

- Nominal trigger

-Nominal trigger-Nominal trigger, zero-suppressed

- Nominal trigger, zero-suppressed

- Nominal trigger, TOT enabled

-TKR trigger-CAL trigger

- External trigger (scintillator)

GLAST LAT Project EM Tests, September 22, 2003

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EM System Optimization ChecksEM System Optimization Checks

TKR trigger only

TKR delay Hits/event

0 10.5

5 10.4

10 10.5

15 10.3

20 10.2

30 9.9

CAL trigger only

TKR delay Hits/event

0 8.2

5 8.1

10 8.0

15 7.9

30 7.7

Rates summary:TKR trigger only – 10 HzCAL trigger only – 30 Hz

TKR or CAL trigger – 35 HzExternal trigger – 3 Hz

Nominal Configuration:TKR or CAL trigger

Non zero-suppressedFITS data output

TOT disabledTKR Threshold = 30

CAL LE Gain = 5CAL HE Gain = 13

TKR delay = 0CAL delay = 70

External Trigger:TKR delay = 35CAL delay = 80

External Trigger

CAL delay Energy (~25% err)

0 1968

20 4041

40 6932

60 5536

70 6175

80 8818

100 5737

120 6850

140 5987

170 5948

200 5630

230 5146

255 4426

GLAST LAT Project EM Tests, September 22, 2003

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Benchmarks for TEM/TEM-PS testBenchmarks for TEM/TEM-PS test

1.TKR: Occupancy vs strip (6 graphs, 1 per layer)2.TKR: Gain vs strip (6 graphs, 1 per layer)3.TKR: Noise vs strip (6 graphs, 1 per layer)4.CAL: Pedestal vs CDE end (4 graphs, 1 per range)5.CAL: Noise vs CDE end (4 graphs, 1 per range)

Review these graphs at 4:00pm meeting today in preparation for 8:30am meeting tomorrow morning.

Today’s activities will be preparation of these graphs; otherwise, take more data with external trigger, and find optimum CAL delay for TKR trigger only, i.e. CAL slow shaper is 3.7 microsec time-to-peak, then subtract TKR time-to-trigger (2.0 microsec).

GLAST LAT Project EM Tests, September 22, 2003

L. Wai 4

Shift Schedule Until End of Data TakingShift Schedule Until End of Data Taking

1. Two shift workers is necessary and adequate

2. Need to assign shifts until October 12

3. Shift schedule proposal to be presented today at 4:00pm meeting