HBD HV Control and Monitoring System

HBD HV Controland Monitoring System

HV, P/T and Gain Variations

Manuel ProisslHBD Meeting 04/06/2010

Run-10 200 GeV : MV vs. P/T

Upgrades For Run10 | PHENIX, BNL HBD HV Control System HBD Meeting :: April 6th, 2010

The HV has been changed properly according to the measured P/T and its 5 bins throughout the 200GeV run. The following plots illustrate that.

The dotted lines represent the edges of the particular bin.

HBD HV Control & Monitoring System Manuel Proissl Page 2 of 29

01/31 16:20 – 03/19 16:25

Run-10 200 GeV : MV vs. Gain

The gain has been overall flat throughout the 200GeV run, meaning the HV changes have achieved their purpose. However, the sudden gain increase on WS2-5 on March 16th remains unexplained.

01/31 16:20 – 03/19 16:25

The HV has been changed properly according to the measured P/T and its 5 bins throughout the 62GeV run. However, one needs to recognize the changes of different gain operation sets: 2k and 4k. The following plots illustrate that.

The dotted lines represent the edges of the particular bin.

01/31 16:20 – 03/19 16:2503/19 17:42 – 03/30 11:07

Run-10 March 15-17th : MV vs. P/T

A closer look at March 16th …

THE GAIN MYSTERY REMAINS

Run-10 March 15-17th : MV vs. P/T

01/31 16:20 – 03/19 16:2503/15 00:42 – 03/17 04:50

Run-10 March 15-17th : MV vs. Gain

01/31 16:20 – 03/19 16:2503/15 00:42 – 03/17 04:50

Run-10 March 16th : MV vs. P/T

01/31 16:20 – 03/19 16:2503/16 01:18 – 03/16 21:00

Run-10 March 16th : MV vs. Gain

01/31 16:20 – 03/19 16:2503/16 01:18 – 03/16 21:00

HBD HV Control and Monitoring System

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