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Testing and Quality Certification for endcap Resistive Plate Chambers for CMS experiment at CERN

Testing and Quality Certification for endcap Resistive Plate Chambers for CMS experiment at CERN. Andrey Marinov On behalf of the CMS Forward RPC Collaboration Y. Ban, J. Cai, H. Liu, S. Qian, Q. Wang, Y. Ye, J. Ying, Yucheng Ge - Peking University, Beijing, China

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Testing and Quality Certification for endcap Resistive Plate Chambers for CMS experiment at CERN

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  1. Testing and Quality Certification for endcap Resistive Plate Chambers for CMS experiment at CERN • Andrey Marinov • On behalf of the CMS Forward RPC Collaboration • Y. Ban, J. Cai, H. Liu, S. Qian, Q. Wang, Y. Ye, J. Ying, Yucheng Ge -Peking University, Beijing, China • B. Hong , S. J. Hong , K. S. Lee, S. Park, K. S. Sim -KODEL, Seoul, S. Korea • A. Ball, J-P. Chatelain, I. Crotty, A. Sharma, W. Whitaker -CERN, Geneva, Switzerland • W. Van Doninck -Vrije Universiteit Brussel, Brussels, Belgium • S. Akimenko -IHEP, Protvino, Russia • L. Litov, A. Marinov -University of Sofia, Sofia, Bulgaria • A. Devlieger –University of Victoria, Victoria, Canada • M. I. Asghar, I. Ahmed, H. Hoorani -National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan • Z. Aftab, M. S. Khan, T. Solaija -Pakistan AtomicEnergy Commission, Islamabad, Pakistan • Colaleo, G. Iaselli, F. Loddo, M. Maggi -INFN Bari, Itlay • Michal MarcisovskySamuel Scheonholz Rene Kuo Manohar Jonnalagedda CERN Geneva

  2. CMS Detector Endcaps

  3. FORWARD Resistive Plate Chambers Final Gas mixture used in all tests 95.5 Freon 3.5 Isob 0.3 SF6 + RH 50% = 5000 ppm

  4. Forward RE Resistive Plate Chambers • 96 Channels. 3 sectors by 32 strips A ,B, C • Standard LVDS output • Slow Control for Threshold and temperature measurements for each F.E.B.

  5. Cosmic stand. Top and Bottom layers scintilators. Possibility to put 10 chambers inside to test them with cosmics Testing RE with Cosmics

  6. Cosmic Stand Trigger Counters Setup

  7. Cosmic Stand Trigger Electronics Setup

  8. Cosmic Stand Data Acquisition Trigger Enable Stop recording Recording Run Signal Reading the TDCs Recording

  9. Main VME Frame

  10. Data Format From the TDC 128 bit presenting the time information from each TDC 0 … 0 1 1 1 0 … 0 1 time bin is 10ns 64 bit channel information 64 bit channel information 64 bit channel information

  11. Software and 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

  12. Software and Computing DAQ PC Pentium 4 1.6 GHz 512Mb RAM 120GB HDD Linux Platform Using standard drivers from National Instruments for the MXI/PCI controller. MXI bus Running Software Offline Analyses Software Online Tracking engine

  13. Data From Cosmic Test Strips Profile Using only 2 scintilators from the top and 2 form the bottom layer

  14. Data From Cosmic Test Strips Profile Coincidence with 2 scintilators from top, 2 from bottom and small counter placed on sector B.

  15. Data From Cosmic Test Noise and Time distribution 400ns Counts 60ns Noise Noise Time bins 0-128 (1bin is 10ns)

  16. Data From Cosmic Test Time Distribution

  17. Data From Cosmic Stand Efficiency and Cluster Size Scanning for efficiency and Cluster size values at different voltages.

  18. Online Tracking Software

  19. Continuously H.V. Monitoring Recording the HV currents every 2 min, and store the data in to the Database. Including the environment conditions. Temperature and Humidity

  20. 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

  21. Quality Control and Certification for CMS installation • Checklists are included in all production steps • Quality control and measurements for the gaps • Cosmic Test Data for Noise, Strips Profile, Efficiency, Cluster Size, HV monitoring, Environment conditions. Certification file for each Endcap RPC Detector

  22. Summary and Future • Summary • All tests and QC for RE chambers are set up. • 100 chambers (RE) are Quality Certificated and ready for Installation in CMS experiment • Production and QC processes are in time. • To do • Optimizing the tracking software

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