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HCAL Commissioning Overview. What has been done Cabling HV-LED mechanics Signal cable -> CAMAC connection Detailed study of PMT stability LED spectra Suspicious PM+CW ~10 min relaxation Double peak for LED Access problem Complete signal cabling layout - PowerPoint PPT Presentation
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HCAL CommissioningOverview
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
1. What has been done• Cabling• HV-LED mechanics• Signal cable -> CAMAC connection• Detailed study of PMT stability• LED spectra
2. Suspicious PM+CW• ~10 min relaxation• Double peak for LED
3. Access problem• Complete signal cabling layout• Narrow slit between muon filter and HCAL• Interference with muon chambers installation
4. Future
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HCAL CommissioningSignal cabling
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
Connectorsgrouping
(one mistake found)
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HCAL CommissioningCabling
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
Protected inside the electronics platform
Top connectorsfed through
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HCAL CommissioningCabling
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
Cable interface to CAMAC
-made 5 (40 channel)
-needed 12 (+7 connectors)due to module is spreadover 12 cable bundles
C-side A-side
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HCAL CommissioningMechanics for HV-LED boxes
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
HV-LED housing mechanics done
8 HCAL + 32 ECAL + few spare
Waiting for motherboards
and
SPECS slaves
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HCAL CommissioningHV-LED
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
HV-LED control board prototype
SPECS slave
0
1
2
3
4
5
6
7
8
9
LED1
LED8
CW power supply
.
.
.
.
.
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HCAL CommissioningHV-LED spread over 10 DAC
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
At least 6 hours per connector
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HCAL CommissioningStability test
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
Long term study of PM/LED performance with the HV-LED control board (SPECS)
8 9 10 11
12 13 14 15
Typical trace-plot monitoring stability of LED pulse over several hours
- pulse rate ~7.7 Hz- light yield ~7000 ph.e.- gain ~1.5E5
pinD1(off) pinD2(on)+1%
-1%
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HCAL CommissioningStability test (2)
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
0 1 2 3
4 5 6 7
Non-typical behaviorof ch#2
2
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HCAL CommissioningLED signal study
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
8 9 10 11
12 13 14 15
LED pulse spectra
WHAT IS IT???
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Two peaks even @ 20s
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HCAL CommissioningSuspicious PM+CW location
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
mod4
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HCAL CommissioningAccess problem
18.01.06 Rustem DZHELYADIN (CERN&IHEP, Protvino)
How to reach there (in the slit of 40cm)
ID Task Name
223 Muon system Installation 224 M5 US side225 M3 US side226 M2 US side227 M4 US side228 M5 PZ side229 M3 PZ side230 M2 PZ side231 M4 PZ side232 M1 station233 Commissioning of Muon elect.234 Chamber installation completed235 Commissioning236 Commissioning
Apr 17 Feb 23Apr 17 May 12
May 15 Jun 9Jun 12 Jul 7
Jul 10 Aug 4Aug 7 Sep 1
Sep 18 Oct 13Oct 16 Nov 10
Nov 13 Feb 8Jan 8 Feb 23
Jul 31 Feb 23Feb 23 Feb 23Feb 23
Feb 5 Feb 23Feb 5 Feb 23
Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May1st Quarter 2nd Quarter 3rd Quarter 4th Quarter 1st Quarter 2nd Quarter
Muon chamber installation schedule
No chance to
access PM-CW during muon
chambers installation
???
HCAL
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HCAL CommissioningFuture
15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)
1. Measurement of Gain-HV for each PMT “in-situ”
2. Measurement of Delay-HV on LED-pulse (+7 mini-connectors needed)
3. Measurement of PMT linearity at different HV
4. Radioactive source commissioning and first run
5. Long-term stability monitoring for whole sub-detector
Preparing to the general commissioning of the LHCb detector the following has to be done
Problems still
1. To complete the cabling of HCAL.2. To solve the access problem (priority before June?)3. PinD amplifiers to be screened up (dismantle 104 LED-PinD and install)4. Exhaustive check of all PM-CW at C-side before June!