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− | The main installation and trigger activities can be organized into the three main phases:
| + | [[Trigger Installation Activities | Trigger Installation Activities]] |
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− | : '''1. Initial installation phase, where only a few crates with electronics are installed and connected to the sub-detector.''' | + | [https://halldweb1.jlab.org/level-1/algorithm/trigger_types.pdf Trigger Types (draft)] |
− | :* Run stand alone DAC for each sub-detector. Start calibration of fadc pedestals, implementing calibration triggers and start tuning trigger parameters
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− | :: 4 TI boards were populated with 4 additional transceivers and can be used as master-TIs handling the clock and trigger distribution for up to 6 crates
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− | :: One extra transceiver was added to 4 TI boards. They can be used as a master-TI for small sub-systems (like the microscope, SC, PS)
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− | : '''2. Final Detector installation'''
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− | :* Use the global trigger distribution (the global trigger and the trigger distribution crates)
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− | :: Up to 4 sub-systems can run in parallel sharing the TS (TS partitioning).
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− | :: Calibrate DAQ (readout windows, pedestals, thresholds, etc.) and trigger parameters (offsets, threshold, etc.)
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− | : '''3. Detector Calibration with the Beam'''
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− | <span style="color:#800000;font-size:120%"> Phase I (Initial Installation) </span>
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− | '''BCAL'''
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− | Can run up to 6 crates with the master TI
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− | * Cosmics
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− | : Generated by CTP in each crate. Possibility to generate the trigger for each BCAL module.
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− | : ID of the 'fired' module is sent to the SSP along with the energy sum.
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− | : The trigger is sent from the SSP front pannel to the master TI.
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− | : Algorithm is being implemented into the CTP.
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− | * Pulser
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− | : Initiated by 2 CAEN 1495 board (24 TTL outputs)
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− | : LED pattern programmed through EPICS
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− | : LVDS output is used as an external trigger for the master TI
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− | '''FCAL'''
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− | Can run up to 6 crates with the master TI
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− | * Cosmics
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− | : Energy summed in the crates (CTP). Energy threshold set at SSP.
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− | : The trigger is sent from the SSP front pannel to the master TI.
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− | * Pulser
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− | : The same as for the BCAL
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