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HBD HV Control and Monitoring System

HBD HV Control and Monitoring System. STATUS UPDATE. Manuel Proissl HBD Meeting 01/13/2009. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 13 th , 2009. CALIBRATION PROGRESS.

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HBD HV Control and Monitoring System

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  1. HBD HV Controland Monitoring System STATUS UPDATE Manuel Proissl HBD Meeting 01/13/2009

  2. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 13th, 2009 CALIBRATION PROGRESS • After initial non-linearity problems (unknown current development) by using a 1GOhm divider for the L1471N calibrations, the actual divider installed on HBD is being used. VA 022 HVCV2.0 LeCroy 1458HP recording • HV Control ramps channel by channel up in a specific pattern (see next slide) • Every second the voltage reading from Fluke is being recorded 16 …… LC 1471 LC 1471 Ground HBD HV Control & Monitoring System Manuel Proissl Page 2 of 4

  3. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 13th, 2009 CALIBRATION PROGRESS • The system ramps every channel up from 0 – 3kV in 50V increments with a timeout of 25.3s each, and from 3 – 4kV in 10V increments with a timeout of 30.3s each. The ramp up speed is set to 10V/s. EN1 Step function as later being used for ramp ups to ST/OP 0-3kV 3-4kV HBD HV Control & Monitoring System Manuel Proissl Page 2 of 3

  4. Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 13th, 2009 DETECTOR OPERATION • HV Control provides the hard-coded protection to prevent the user from the opportunity to destroy the detector (e.g. setting DV to 6kV). • HV Control offers various options to bring the detector up to operational mode. • Here a few questions for the group: • Do we want to operate based on GAIN (2k to 10k) and load automatically the corresponding voltages (Tom’s sheet / future modifications) into the ramp up process OR set voltages in the ramp up table directly with the GAIN in mind? • Many FB/RB tables in Run7 had same Mesh voltage… Do we want to keep this for every module variable based on key voltages? • Hard-coded limits: • Operational/Standby voltages – 4000V (?) • RUP/RDN – 500V/s • Trip Current – 200mkA HBD HV Control & Monitoring System Manuel Proissl Page 4 of 4

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