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HCAL status and calibration. HCAL status survey 07.09.2009. A quick method to check the LEDs, PM/CWs and integrators : enable LEDTSB pulser (2 kHz continuous LED flashing) look at the PM currents. All the LEDs, PM/CWs and integrators OK. +. nA. The CAT reflection test:

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Presentation Transcript
slide1

HCAL status and calibration

Yu. Guz 08/09/2009

slide2

HCAL status survey 07.09.2009

  • A quick method to check the LEDs, PM/CWs and integrators :
  • enable LEDTSB pulser (2 kHz continuous LED flashing)
  • look at the PM currents

All the LEDs, PM/CWs and integrators OK

+

nA

  • The CAT reflection test:
  • FEB side: ATI connector problem crate 23 slot 11 in 28 (I_15_02) (fixed)
  • no problem found at the PM side

gain=100k, nominal LED intensities

=

HCAL low level HW is operational

Yu. Guz 08/09/2009

slide3

HCAL 137Cs calibration

Four 137Cs runs since June: 19 Jul, 07 Aug, 14 Aug, 04 Sep

Several source passages at different HVs in runs of 14 Aug and 04 Sep, in order to renewPM regulation curves

New calibration set (PHYSICS and STDB HVs and PM regulation curves) is ready, will be available in Db soon

Yu. Guz 08/09/2009

slide4

PM stability, 13.02-04.09.09

13.02-04.09.09

Slow variation of PM gains: since 13.02, 96 PMs out of 1488 changed by (10…40)%

The PM gain drift is expected to continue  137Cs calibration to be refreshed on needs

96 cells

Yu. Guz 08/09/2009

replacements

slide5

Spare slides

Yu. Guz 08/09/2009