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| | [http://www.iss.infn.it/webg3/cebaf/hadron.html HallA RICH, old page] | | [http://www.iss.infn.it/webg3/cebaf/hadron.html HallA RICH, old page] |
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| − | == RICH ON-LINE MONITOR SHIFT WORKERS ==
| + | [[Shift Checks]] and what to do in case of chamber trips |
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| − | Go on the ''New HallA Tools, "EDM (HLAMain)'' (the old works also fine), click on <u>RICH Detector</u> then check:
| + | How to acquire a [[RICH pedestal run]], generate the pedestal files and make them visible to the DAQ, for the next run |
| − | * '''Radiator Pressure''' ~ '''10 V''',
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| − | * '''Power Supplies''' ~ '''3.8 V''' (both polarities: A nearly 3.76 V, B nearly 3.93 V),
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| − | then click on the <u>CAEN</u> buttom;
| + | [[RICH Information for experts]] |
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| − | the ''Crate 1'' window pop up, click on <u>Modules</u> and then again on the next window ''Crate #1'' click on <u>Modules</u> of ''Module 2'' (the only active module, then you can check and modify HV).
| + | [http://hallaweb.jlab.org/dvcslog/ARICH/ ARICH-elog] |
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| − | Channel 16 and Channel 17 are the only channels connected to the detector.
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| − | They have to be on:
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| − | * Status "Normal",
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| − | * HVon have to be "ON"
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| − | * the voltage "Vmon" has to correspond to the voltage "Vset"
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| − | i. nominally between 2200 and 2300 for Channel 16
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| − | i. between 200 and 400 on Channel 17.
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| − | If not, click on the <u>Module 2 Controls Screen</u> button, on the bottom of the panel, and click on <u>HVon ON</u>, then the HV should raise up very slowly, 5 V/s.
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| − | If a trip occurred, the Status of the channel will be ''Trip'', after turning on the HV go back to the first ''Crate 1'' window and click on <u>Clear All Alarm</u>.
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| − | Then the status should change into ''Up'' and eventually into ''Normal''.
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| − | == Turn HV OFF DURING BEAM STUDIES OR CONFIGURATION CHANGES OF L-HRS. ==
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| − | In case of repetitive trips, keep HV OFF also during configuration changes of BigBite.
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| − | If the RICH is continuing tripping, keep HV off and call one of the [[RICH experts]],
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| − | Do not try to keep HV on more than twice consecutively.
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