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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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Hbd hv control and monitoring system

HBD HV Controland Monitoring System

STATUS UPDATE

Manuel Proissl

HBD Meeting 01/13/2009


Calibration progress

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


Calibration progress1

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


Detector operation

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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