Fall 2015 spring 2016

L1 trigger commissioning plans for the spring 2016 run

• PS trigger

- PS trigger efficiency studies (using TAGM/TAGH, FCAL & BCAL triggers)

- Threshold scans

• FCAL & BCAL main production trigger

- threshold scans for individual FCAL and BCAL triggers (study trigger time dependence on thresholds, rates)

- collect data samples using the FCAL and BCAL individual triggers

- introduce individual thresholds for BCAL and FCAL energies for the FCAL & BCAL trigger

- tune timing offsets between BCAL and FCAL (rate scans)

- trigger rate studies. Adjust energy thresholds. Take data for different thresholds and different luminosity

• Implement TS FP triggers

- BCAL LED

- FCAL LED

- PS LED

• Implement multiple triggers (initial implementation)

- combine PS, FCAL & BCAL, FCAL, and BCAL triggers

(note FCAL and BCAL triggers may be taken out from the production trigger later on).

- add TS periodic pulser

- add TS FP triggers

• TAC trigger

- implement TAC stand alone trigger

- implement configuration with the PS and TAC triggers. Read out TAGH/TAGM crates

• Implement triggers for efficiency studies (have to decide what would be the best rigger for this, besides the minimum bias)

• Implement TAGH/TAGM triggers

- combine TAGH/TAGM with other trigger types

• Trigger for FDC alignment (ST / TOF + FCAL )

• Trigger for FCAL MIPs calibration ( ST & TOF )

• Improve BCAL & FCAL triggers at low FCAL energies (use coincidences between FCAL and ST/TOF)

• PS trigger (TAGM bias voltage calibration, TAGH, PS voltage scans, efficiency studies). Run TRD in parallel, if no problems.

- test/debug trigger (2 - 3 hours).

- production (1 - 2 night shifts)

run conditions depend on the accelerator performance (200 nA electron current, 10^-4 radiator, 10^-3 converter + Be converter, TBD)

• Trigger for FDC alignment (ST/TOF + FCAL)
• Trigger for FCAL MIPs calibration (ST & TOF)

- test/debug trigger (3 - 4 hours, CDC/FDC switched off)

- production at low luminosity with the FDC switched on (1 - 2 night shifts for both the FDC alignmnent and FCAL MIP triggers)

• Debug FCAL/BCAL trigger

- trigger studies (3 - 4 hours)

- take data with the BCAL/FCAL trigger, FCAL/BCAL thresholds will be tuned, chambers can be switched on depending on run conditions (1 - 2 night shifts).

- test trigger performance at high rate. Take data with 'nominal' trigger thresholds.

• Trigger generated by TAGM/TAGH

- trigger studies (3 - 4 hours)

- combine TAGH/TAGM with other trigger types.

- take data with the total absorption counter, 2x10-5 radiator, a few nA current (TBD) (2 - 3 hours)

• Special trigger requests from sub-detectors