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Since the allocated beam time is not very much, we should exploit the capability of operating the CU with multiple trigger engines. This was demonstrated to work at CERN, we need to define more engines and test them.
Moreover, effects like pedestal drift and different investigations to be performed, suggest that we run in such mode to cover more topics in a short data-taking time.
Multiple trigger engines worked with the CU both at CERN-SPS and at INFN with CR tests.
SUch Such operation must will be verified prior to start with beam, and immediately when the beam is onagain at GSI, with CR and beam, to make sure that the CU operates in the expected way and we can proceed with the test in such mode.
The CNO trigger, in combination with TKR and CAL triggers will be the main trigger for the test. Some runs will be taken with external trigger, others will be taken with standard internal trigger made with TKR and CAL primitives. Please note that without external trigger we will have some contamination from CR.
A periodic trigger, with variable frequency, will be in parallel to the main particle trigger all the runs, in order to sample the hardware status with random triggers.
All these requestes are implemented through the specific multiple trigger engines defined below, each of which mapped to a specific BT configuration. Here is a list of the configurations used.
Any of the EXTERNAL, CNO, TKR, CAL-LO, CAL-HIGH, PERIODIC signal can open the trigger window.
List of runs
Below is a list of specific run requests. Plese update the table and notify Luca so that a proper run schedule can be developed and agreed with GSI
Purpose | preferred schedule | Ion | Energy | Rate on CU | Beam focus | CU configuration | Trigger | notes | reference | |
|---|---|---|---|---|---|---|---|---|---|---|
Test multiple trigger engines prior to beam | nov 16-17 | NA | NA | NA | NA | enable multiple trigger engines | CNO, periodic, internal trigger | all BTs | change CNO take runs at different CNO thresholds, periodic trigger frequency | luca |
Test multiple trigger engines w beam | nov 18 | C | 1.5Gev/n | 100Hz | any | enable multiple trigger engines | CNO, periodic, internal trigger | all BTs | change take runs at different CNO thresholds, periodic trigger frequency | luca |
Monitor beam rate and conditions | nov 18 | C | 1.5Gev/n | 10-1000Hz | play with focus to change beam intensityon CU | 4 range readout, non zero suppression | external | BT52, BT53 | to be repeated shortly per configuration change | luca |
Rate scan | after multiple engine work | C | 1.5Gev/n | 10-1000Hz | play with focus to change beam intensityon intensity on CU | multiple trigger engines | BT50, BT51, BT54 CNO, periodic, internal trigger | vary periodic trigger frequency to induce pedestal drift | luca, eric g | |
Tracking performance | nov 18 any time | C,Xe | 1.5Gev/n | 10-1000Hz | far and near focus | multiple trigger engines, flight settings, 4range-readout NZS | BT50, BT51, BT52 CNO, internal trigger | investigate tracking at different rates and angles (0,30,45,60 TBD), scan tower3 w/o ACD tile with ext trigger | leon, INFN | |
Tracking saturation | nov 18 any time | C,Xe | 1.5Gev/n | 10-1000Hz | far focus | multiple trigger engines, flight settings | CNO, TKR trigger, 4range-readout NZS | BT50, BT51 | scan different angles (0,30,45,60 TBD), scan tower3 w/o ACD tile with ext trigger | leon, INFN |
CAL calibration | nov 18 | C,Xe | 500MeV 600MeV/n, 1GeV/n, 1.5GeV/n | 100Hz | far and near focus | multiple trigger engines | CNO, periodic, internal trigger | BT50 | verify quenching factors, CAL calibrations, ACD partial calibration | CAL team |
CAL calibration comparison with previous results | nov 18 | C,Xe | 1.5GeV/n | 100Hz | far and near focus | BT50, BT51 | beam on tower1 to avoid TKR in the line | CAL team | ||
Energy scan | nov 19 | C,Xe | 100MeV 600MeV/n - 1.5GeV/n in steps | 10-1000Hz | far and near focus | multiple trigger engines | BT51 CNO, periodic, internal trigger | attempt to simulate different ions by varying ionization energy | nicola | |
Secondary ions with target | nov 19 | Xe | 1.5GeV/n | 10-1000Hz | far and near focus | multiple trigger engines | CNO, periodic, internal trigger | BT50 | attempt to get different ions by shooting beam through a target - need verification with GSI people | benoit |
Charge injection in CAL with beam | nov 19 | C | 1.5GeV/n | 10-1000Hz | far and near focus | BT50 | check pedestal restoration with beam ON, explore different beam rates; can use existing CalibGenCAL script | sasha | ||
Charge injection in TKR with beam | nov 19 | C | 1.5GeV/n | 10-1000Hz | far and near focus | BT50 | check rate effect in TKR signal; must identify CI script and plots to monitor | leon, TKR team | ||
scintillation measurement in CDE | nov 19 | C, Xe? | 1.5GeV/n | 100Hz |
| NA | place another detector upstream and monitor signal pulse | benoit |