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Recommended Runs for immediate Data Analysis

Go get the from the runs database

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Synchronized runs (check tags in rcReport and txt files in run directory) :
  + 700000475 : 10k events, external trigger on scintillators.
  + 700000502 : external trigger on scintillators, new ancillary DAQ

Important Detector Register Settings

Expected value for most important registers in DAC Counts or system clock ticks

CAL 

• CAL Range Decision Time (GTEM/GCCC/GCRC/delay_1) : 31
• CAL Time After Range Decision Until ADC Readout Time (GTEM/GCCC/GCRC/delay_2) : 53

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CAL

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Energy Calibrations

Includes results from calibrations prior to CERN 

Analysis of muon data taking in the CPT runs is included here 

Also dedicated muon runs results are found here

CAL CPT Charge injection runs

Includes data analysis results on all charge injection runs, table generation etc... 

Baseline Data Taking

The baseline definition for the registers used for data taking is found here.

• CAL DAC for DC Reference (GTEM/GCCC/GCRC/GCFE/ref_dac) : 0

TKR

• TKR DAC (range,threshhold) (GTEM/GTCC/GTRC/GTFE/dac)) : (22 to 36, 0)

ACD

• Width of trigger window in GEM : 12

• Delay from ACD trigger discriminator to AEM trigger primitive formation (GAEM/GARC/veto_delay) : 0
• Stretch width of ACD trigger primitive (GAEM/GARC/veto_width): 5

• ADC acquisition time (GAEM/GARC/adc_tacq) : 0
• Delay from ACD trigger primitive to AEM hitmap data latch (GAEM/GARC/hitmap_delay): 6

• Stretch width of ACD trigger primitive to AEMXS hitmap data latch (GAEM/GARC/hitmap_width) : 0
• Delay from trigger to hold (GAEM/GARC/hold_delay): 34

Important Timing Settings

Recommended values from LAT integration in system clock ticks

• Delay from CAL trigger discriminator to TEM trigger primitive formation (GTEM/GCCC/trg_alignment:0-7) : 0
• Delay from TKR trigger discriminator to TEM trigger primitive formation (GTEM/GTCC/trg_alignment:0-7) : 5
• Stretch width of CAL trigger primitive (GTEM/GCCC/trg_alignment:8-15) : 15

• Hold trigger primitive for TEM diagnostic latching of CAL trigger primitive (GTEM/GCCC/trg_alignment:16-23) : 8
• Hold trigger primitive for TEM diagnostic latching of TKR trigger primitive (GTEM/GTCC/trg_alignment:16-23) : 9

The values shown below are based on the LAT Alignment and we will use these as default for CU tests. Note that this is for the flight configuration B2 that became LAT701 config. TEM diagnostics are not enabled and they will change these values.

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Below is a timing diagram that explains how knobs are set to ensure charge is collected at the peak for all 3 detectors. Note that CAL beling the slowest its TREQ Delay is set to 0, while ACD being the fastest detector has more delays added.

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Finally there are some plots from trigger jitter from Martin Kocian. Note that jitter is large when hit the CAL diodes (see figure)
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