1 / 13

HCAL Commissioning Overview

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

tashya-stevenson
Download Presentation

HCAL Commissioning Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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 • Narrow slit between muon filter and HCAL • Interference with muon chambers installation • Future 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  2. HCAL Commissioning Signal cabling Connectors grouping (one mistake found) 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  3. HCAL Commissioning Cabling Protected inside the electronics platform Top connectors fed through 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  4. HCAL Commissioning Cabling • Cable interface to CAMAC • made 5 (40 channel) • needed 12 (+7 connectors) • due to module is spread • over 12 cable bundles 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino) C-side A-side

  5. HCAL Commissioning Mechanics for HV-LED boxes HV-LED housing mechanics done 8 HCAL + 32 ECAL + few spare Waiting for motherboards and SPECS slaves 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  6. HCAL Commissioning HV-LED HV-LED control board prototype SPECS slave LED8 1 3 5 7 . . . . . 9 0 2 4 6 8 CW power supply LED1 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  7. HCAL Commissioning HV-LED spread over 10 DAC At least 6 hours per connector 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  8. HCAL Commissioning Stability test Long term study of PM/LED performance with the HV-LED control board (SPECS) 8 9 10 11 • Typical trace-plot monitoring stability of LED pulse over several hours • pulse rate ~7.7 Hz • light yield ~7000 ph.e. • gain ~1.5E5 12 13 14 15 pinD2(on) pinD1(off) +1% -1% 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  9. HCAL Commissioning Stability test (2) 1 0 2 3 Non-typical behavior of ch#2 2 6 5 7 4 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  10. HCAL Commissioning LED signal study 8 9 10 11 LED pulse spectra WHAT IS IT??? Two peaks even @ 20s 9 12 13 15 14 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  11. HCAL Commissioning Suspicious PM+CW location mod4 15.02.2006 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  12. HCAL Commissioning Access problem How to reach there (in the slit of 40cm) No chance to access PM-CW during muon chambers installation ??? HCAL Muon chamber installation schedule 18.01.06 Rustem DZHELYADIN (CERN&IHEP, Protvino)

  13. HCAL Commissioning Future Preparing to the general commissioning of the LHCb detector the following has to be done • Measurement of Gain-HV for each PMT “in-situ” • Measurement of Delay-HV on LED-pulse (+7 mini-connectors needed) • Measurement of PMT linearity at different HV • Radioactive source commissioning and first run • Long-term stability monitoring for whole sub-detector Problemsstill • To complete the cabling of HCAL. • To solve the access problem (priority before June?) • PinD amplifiers to be screened up (dismantle 104 LED-PinD and install) • Exhaustive check of all PM-CW at C-side before June! 15.02.2006Rustem DZHELYADIN (CERN&IHEP, Protvino)

More Related