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HBD HV Control and Monitoring System

HBD HV Control and Monitoring System. RUN-9 UPDATE. Manuel Proissl HBD Meeting 04/08/2009. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: April 8 th , 2009. SOFTWARE UPDATES.

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HBD HV Control and Monitoring System

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  1. HBD HV Controland Monitoring System RUN-9 UPDATE Manuel Proissl HBD Meeting 04/08/2009

  2. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: April 8th, 2009 SOFTWARE UPDATES • The TripProtect System is not only aware of new dead shorts, but now also ‘healing’ shorts or rather a safety check to be sure any resistor changes are detected in case the TripProtect calibration has not been completed afterwards! • Due to major HV server crashes in the past week, I’ve extended HV Control capability to run on any VA machine, based on availability. • Everyone who’s aware of RC’s very helpful Message Viewer, which is used by all DAQ experts, will appreciate the HV system’s latest update – its own Message Viewer, categorizing Error, Warning protocols and general process activity. • Automated calibration of the TripProtect system based on the LeCroy delivered current measurements implemented, which represents another config option besides the measured resistor chain method. HBD HV Control & Monitoring System Manuel Proissl Page 2 of 4

  3. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: April 8th, 2009 HV OPERATION DURING PHYSICS RUNS • During Physics Run 278942, the SA1 changed the P/T trigger set and operated HV during the run with the permission of the SL, although the Standing Orders strongly prohibit any voltage changes during run… • Upcoming Update: HV Control will not leave this “catastrophic analysis nightmare” issue to the humans anymore  ..instead, it will have the option to either block or ‘strongly’ warn the SA1 when HV operation is requested during Physics Runs! HBD HV Control & Monitoring System Manuel Proissl Page 3 of 4

  4. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: April 8th, 2009 DETECTOR UPDATE • After the resistor change on EN4-B at the last week’s access, the measured current started out at ~88.56uA at 2.5kV and over a time period of about 4 days, slowly turned into a dead short. It’s drawing now ~89.6uA at Standby! • ES1 however, which has not been touched during the access, performed well with the new TP calibration until 04/09 10PM EST, and may have gotten another dead strip, which still needs to be investigated at our next access. Since then, ES1 has been turned off! • All 4 modules on Relay Board No. 2 [WN5, WS1,2,3] are showing spontaneous massive trips from time to time: overall this has been happening ~7 times over the past 2 weeks. • Strategy: New UVC 1471N, communication cable and relay board will be tested with a comparable load at 4kV until the next access (24/7) and then finally if test successful, will replace the setup associated with box no. 2 HBD HV Control & Monitoring System Manuel Proissl Page 4 of 4

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