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tuning_the_s800_xdt [2017/06/17 15:03] pereira [Coincidences] |
tuning_the_s800_xdt [2017/06/17 15:10] pereira [Coincidences] |
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* The auxiliary detector provides a secondary trigger that is fed into the S800 trigger system | * The auxiliary detector provides a secondary trigger that is fed into the S800 trigger system | ||
* A key part of setting up the S800 for such experiments is getting proper timing setup between the S800 and any auxiliary detectors | * A key part of setting up the S800 for such experiments is getting proper timing setup between the S800 and any auxiliary detectors | ||
- | * For cases where the Secondary detector has a slow response relative to the S800, the coincidence timing must be reset to the S800 timing by delaying the S800 trigger using the third gate and delay generator on the | + | * For cases where the Secondary detector has a slow response relative to the S800, the coincidence timing must be reset to the S800 timing by delaying the S800 trigger using the third gate and delay generator on the [[S800 DAQ tools#Trigger GUI|trigger GUI]] |
* A typical S800 delay for SeGA is 450 ns | * A typical S800 delay for SeGA is 450 ns | ||
* Probably smaller typical S800 delay needed for HiRA | * Probably smaller typical S800 delay needed for HiRA | ||
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* Setup | * Setup | ||
- | * Coincidence signals are usually visible on scope without running scope in acquire mode | + | * Using the [[S800 DAQ tools# |
+ | * Assign each wire to an inspect channel from the patch panel so that you can check their timings | ||
* Adjust the width of the early signal (S800 or secondary) should be wide enough to catch coincidences with the late signal (width of late signal is not critical) | * Adjust the width of the early signal (S800 or secondary) should be wide enough to catch coincidences with the late signal (width of late signal is not critical) | ||
* Readjust TDC delays based on changes made to S800 trigger delay | * Readjust TDC delays based on changes made to S800 trigger delay | ||
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* To be resolved: | * To be resolved: | ||
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* Sample timing for running S800 with SeGA | * Sample timing for running S800 with SeGA | ||
* SeGA trigger is late with respect to S800 trigger | * SeGA trigger is late with respect to S800 trigger |