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Roadmap for CMS-RPC project

Roadmap for CMS-RPC project. L. M. Pant Nuclear Physics Division Bhabha Atomic Research Centre, Mumbai. pseudorapidity ,  = - ln tan(/2)  is the polar angle of the particle wrt the beam axis. 2008-2010. 2012-2013. The RPC fourth layer was de-scoped for lack of funds.

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Roadmap for CMS-RPC project

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  1. Roadmap for CMS-RPC project L. M. Pant Nuclear Physics Division Bhabha Atomic Research Centre, Mumbai India CMS Meeting, BARC, 28 July 2011

  2. pseudorapidity,  = - ln tan(/2)  is the polar angle of the particle wrt the beam axis India CMS Meeting, BARC, 28 July 2011

  3. 2008-2010 2012-2013 The RPC fourth layer was de-scoped for lack of funds RPC Upscoped in 2008 for installation in 2010 In between priorities changed for CMS RPC Upscope is revived and put alongwith other Upgrades India CMS Meeting, BARC, 28 July 2011

  4. Expected financial contribution for low  upgrade 4.5 MCHF 18% India • 800 kCHF • 4 Crore India CMS Meeting, BARC, 28 July 2011

  5. The Indian contribution : parked institute wise 2 Crore / 400 kCHF 2 Crore / 400 kCHF India CMS Meeting, BARC, 28 July 2011

  6. How CMS-RPC management looks at 800 kCHF 2 Crore / 400 kCHF 2 Crore / 400 kCHF India CMS Meeting, BARC, 28 July 2011

  7. RE4/2 sector : 2 end caps x 36 chambers + spares = 100 chambers India CMS Meeting, BARC, 28 July 2011

  8. Integration of RE4/2 and RE4/3 RPCs : 10o chambers RE4/3 (Belgium) RE4/2 (India) India CMS Meeting, BARC, 28 July 2011

  9. The groups involved with financial contributions k CHF → India CMS Meeting, BARC, 28 July 2011

  10. as per the earlier TDR : Three RPC assembly sites 40 50 110 India CMS Meeting, BARC, 28 July 2011

  11. RPC assembly sites The manpower to run this facility will be provided by the respective institutes when their detectors are being tested India CMS Meeting, BARC, 28 July 2011

  12. Proposed scenario 40 100 60 India CMS Meeting, BARC, 28 July 2011

  13. Proposed scenario The manpower to run this facility will be provided by the respective institutes when their detectors are being tested India CMS Meeting, BARC, 28 July 2011

  14. Routing of bakelite, gas-gaps, mechanics and finally RPCs to CERN Gas gap route Mechanics route BELGIUM CERN KOREA RPC route Bakelite route ITALY CHINA INDIA India CMS Meeting, BARC, 28 July 2011

  15. Pre-production Modus Operandi at three sites To begin with each site produces the first 10 chambers Mechanics and gas gaps expected by end of August FEBs/DB etc. would arrive by Nov 2011 In all, first 30, chambers should reach CERN by March 2012 Procedure continues for the remaining chambers : all to be delivered by 2012 Stricter QA/QCs for gas gap characterization and data base maintenance India CMS Meeting, BARC, 28 July 2011

  16. Spacer test for the gas gaps 39 peaks are recorded corresponding to each of the 39 spacers in the Top Wide gas gap (RE4/2-TW03) Non-Spacer region Spacer region Overpressure (mbar) → Time (sec) → India CMS Meeting, BARC, 28 July 2011

  17. Prototype assembly of RE4 chambers (positive results → green signal for mass production) • Validation of bakelite quality • Surface smoothness • Bulk resistivity • Validation of gas gap fabrication procedures • a. mechanical and electrical QCs • b. gluing of gaps • c. bonding strength of spacers • d. efficiency in a cosmic hodoscope Oct. '2010 India CMS Meeting, BARC, 28 July 2011

  18. First prototype for RE4 Apr 2011 S2  5 Hz, Th -180 mV S1  3 Hz, Th ~ -120 mV India CMS Meeting, BARC, 28 July 2011

  19. Cost of one RPC : RE4/2 A fully integrated CMS-bakelite RPC has Three gas gaps Three Front End Boards Mechanics Cu read out panel Cu cooling system Al supports, Screen box 96 Co-axial signal cables Mylars, gas pipes HV, LV cables Rs. 3 Lakhs in 2008  6 kCHF There are other heads too India CMS Meeting, BARC, 28 July 2011

  20. Additional heads • Shipment (25 lakhs / 50 kCHF) • Infrastructural investment at home (>>> 50 kCHF) • (Test stand, Electronic Modules, gases, DAQ) • HV Cables/Power supplies/tests at CERN ( 50 kCHF) • Manpower : Installation/Commissioning at CERN • (4 persons x 4 months = 16 man months :  50 kCHF) India CMS Meeting, BARC, 28 July 2011

  21. Recent highlights of RPC lab at NPD-BARC Gas flow of 5 litres per hour being configured Sufficient gas available Humidifier for the RPC gas mixture established Hodoscope being configured. 5/16 scintillators assembled VME based DAQ/Software being developed for characterizing the RPCs : Renju 3 x 32 channel multihit TDCs available for 1 RPC 2 x 3 x 32 channel multihit TDCs needed for 2 more RPCs India CMS Meeting, BARC, 28 July 2011

  22. twisted pair (40 pin / 20 pairs) flat cables for 100 chambers (A1, A2 B1, B2 C1, C2) India CMS Meeting, BARC, 28 July 2011

  23. Cu cooling system : Type 4/2 for 100 chambers MDPDD : Manish India CMS Meeting, BARC, 28 July 2011

  24. Cu cooling system : Type 4/3 for 100 chambers MDPDD : Manish India CMS Meeting, BARC, 28 July 2011

  25. Cosmic stand at RPC Lab., in NPD-BARC L : 2m, W : 1.6 m, H : 3 m • Simultaneously handle : • Three gas gaps with Argon for • resistivity measurements • Three gas gaps on RPC gas mixture • [R134a (96%) + Isobutane (3.5%) + SF6 (0.5%)] • with 45% RH • Three RPCs for evaluation of : • Efficiency • Strip profile • Cluster size • Plastic scintillators (hodoscope) separated • by 2m to get the cosmic trigger from muons 2m India CMS Meeting, BARC, 28 July 2011

  26. Three RPCs per week : assembly and characterization @ Three RPCs per week : 10 RPCs in a month : March 2012 40 RPCs in 4 months or : July 2012 100 RPCs in 10 months : Dec 2012 Say approximately a year (end 2012) Matches well with the time scale for delivery at CERN 2m India CMS Meeting, BARC, 28 July 2011

  27. The old cosmic rack moves into an A/C area for storage of equipments as and when they arrive (corner of old beam hall) Civil work completed for housing 3 units of A/Cs with Dehumidifiers for round the clock operation for RPC Lab. Equipment being procured by TSD : 25 Lakhs India CMS Meeting, BARC, 28 July 2011

  28. Plastic scintillators for the hodoscope Plastic scintillator Width : 18 cm Length : 180 cm Thickness : 1 cm PMT read out from both the ends (OR) India CMS Meeting, BARC, 28 July 2011

  29. Eight plastic scintillators on the lower bed 8 x 18 = 144 cm 5/16 scintillators configured hope to finish 16/16 by Aug end India CMS Meeting, BARC, 28 July 2011

  30. The Indian RPC collaboration Panjab University, Chandigarh NPD-BARC 2 scientist 1 assistant 10 … 40 …. 60 61 … 100 MDPDD-BARC : 1 engineer 2 technitians Cu cooling Mechanical aspects Fabrication Transportation 2 Faculties 3-4 students, 2 tecnitians India CMS Meeting, BARC, 28 July 2011

  31. Eagerly waiting for the first chamber to roll out by Jan 2012 Thank You ! India CMS Meeting, BARC, 28 July 2011

  32. CMS Trigger system for ensuring efficient muon reconstruction and identification receives data from LHC bunch crossing rate of 40 MHz Level 1 Trigger (L1) seeds CSCs do the low level triggering and tracking High Level Trigger (HLT) Level 2 Trigger (L2) track info. from muon detectors (DTs, CSCs and RPCs) 100 kHz at designed luminosity 100 Hz at designed luminosity Level 3 Trigger (L3) Info from Si-Tracker India CMS Meeting, BARC, 28 July 2011

  33. simulated trigger efficiency plot : Piet Verwilligen the 4th layer is in between  = 1.2 and 1.6 small dips are due to an interface between different rolls in one chamber  = 1.24  = 1.42 India CMS Meeting, BARC, 28 July 2011

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