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CMS Endcap Resistive Plate Chambers

CMS Endcap Resistive Plate Chambers. Andrey Marinov On Behalf Of CMS Collaboration. CERN. Compact Muon Solenoid. Endcaps. Endcap RPC Schema. Final Gas mixture used in all tests 95.5 Freon 3.5 Isob 0.3 SF6 + RH 50% = 5000 ppm. Electrical Schema. 96 Channels . 3 sectors, 32 each

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CMS Endcap Resistive Plate Chambers

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  1. CMS Endcap Resistive Plate Chambers Andrey Marinov On Behalf Of CMS Collaboration.

  2. CERN

  3. Compact Muon Solenoid Endcaps

  4. Endcap RPC Schema Final Gas mixture used in all tests 95.5 Freon 3.5 Isob 0.3 SF6 + RH 50% = 5000 ppm

  5. Electrical Schema • 96 Channels. 3 sectors, 32 each • Standard LVDS output • Controlling and monitoring of FEB threshold • Monitoring of FEB temperature

  6. Production Flow Process Dec 2003 Bakelite Purchase Italy Ship to Korea Cut Clean Gaps Ship to CERN Built in Seoul QC Shipped to CERN Procurement Cables and pieces Mechanics Kit prep in China Test in Italy FEBs, Adaptor / Distribution Boards 6 Procure from Italy Order from Pakistan Ship to CERN 6 Construction Database 6 Chamber Assembly ISR Lab @ CERN QC 6 6 Production Database (CMS) Commissioning COM1 & COM2 Installation@SX5 Storage @ X5 http://cern.ch/cms-isr-endcap-rpc http://cern.ch/rpc-endcap Dec 2004

  7. Production Of HV Gaps K O D E L • Seul – South Korea

  8. The Assembly Lab AtCERN - ISR GapQC Chamber QC

  9. Some Technological Steps http://cern.ch/cms-isr-endcap-rpc

  10. Testing Of Endcap RPC with Cosmic Rays • Cosmic Stand.

  11. Trigger Configuration Counters Setup

  12. Trigger Electronics Setup

  13. DAQ Trigger Enable Stop recording Recording Run Signal Reading the TDCs Recording

  14. Cosmic Test Computing DAQ PC Database PC MXI bus TCP/IP TCP/IP TCP/IP CAEN 1527 HV power supply Control PC RS232 I2C Multiplexer For slow control Tracking PC

  15. Cosmic Test Data Strips Profile Strips Profile taken with only 2 scintilators from the top and bottom layers.

  16. Cosmic Test Data Strips Profile Including a small 50cm counter.

  17. Cosmic Test Data Time Distribution

  18. Cosmic Test Noise Profile Noise and Time distribution 239 400ns Counts 119 60ns Noise Noise Time bins 0-128 (1bin is 10ns)

  19. Efficiency and Cluster Size Scanning for efficiency and cluster size on a different voltages [8kv-9.6kv]

  20. Cosmic Stand – Muons Tracking

  21. HV Long Term Monitoring Take sample of the current of each 2 minutes. Take sample of the environmental conditions at the same time

  22. Endcap RPC Database http://forwardrpc.cern.ch/cms_forward_rpc/index.htm Chamber QC data Gas gaps QC data VISIBLE SEARCHABLE WORLDWIDE DATABASE Results form Cosmic Test Production data Environment conditions data • Online • HV monitoring and QC IV data storage • Searchable tracking for individual Gaps / Chambers • Production QC procedures • Mechanics • Cosmic Tests

  23. SX5 – CMS home Cessy – France

  24. CMS YB-1

  25. YB+2 Lowering In CMS Cavern

  26. Future Plans • Set Up the endcap RPC readout and controlling – Link Boards and Control Boards • Lowering the YB-1 – probably in the end of 2007. • Starting the LHC – 2008

  27. Thank You For Your Attention • For more details about CMS http://cms.cern.ch

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