RPC Upgrade for the CMS experiment

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1 RPC Upgrade for the CMS experiment L. M. Pant Nuclear Physics Division Bhabha Atomic Research Centre, Mumbai 1

2 Restoration of the full TDR, RE4 ( ) Present experiment runs with 3 endcaps 2

3 one of the end cap under installation : 72 RPCs / end cap Type 2 chambers Type 3 chambers 3

4 RE4/2 = 72 RE4/3 = 72 Spares RPC = 56 Total no. of RPCs = 200 RPCs NPD BARC, Mumbai & Panjab University, Chandigarh CERN India Belgium 4

5 Arrival of mechanics : Feb 2012 Engineering support from MDPDD VME DAQ and TDCs The road map : RPC budget Signals from single GEM foil L. M. Pant 5 India CMS Meeting, BARC, 03 Aug 12

6 Two wooden packages being offloaded from the truck 24 th February 2012 at NPD BARC L. M. Pant 6 India CMS Meeting, BARC, 03 Aug 12

7 Honey Comb Panels stacked at Mumbai site : 25 sets Retrofitting need to be done 7

8 Cu Faraday with mylar, Cu Read Out Strips, Screen Covers stored in shelves Platform for mylar cutting Cu Faraday with Mylar : 25 sets Cu Read Out Strips : 50 sets Screen Covers : 25 sets 8

9 Leak and Spacer test facility at NPD BARC, Mumbai Bottom Gap of RE*/2 type from old stock (2007) 20 cm 20 mbar of overpressure with water column 9

Pressure Transducer : Sensor Technics (CTE7000) with a 20 bit ADC Picolog (20 mbar of overpressure) Leak rate : 2.3 x 10 4 mbar. litre / sec bottom gap of RE*/2 type mbar 19.4 19.

10 Pressure Transducer : Sensor Technics (CTE7000) with a 20 bit ADC Picolog (20 mbar of overpressure) Leak rate : 2.3 x 10 4 mbar. litre / sec bottom gap of RE*/2 type mbar y = x R² = Series1 Linear (Series1) 102 intact spacers in a bottom gap of RE*/2 type non spacer region sec 10

11 Arrival of mechanics : Feb 2012 Engineering support from MDPDD VME DAQ and TDCs The road map : RPC budget Signals from single GEM foil L. M. Pant 11 India CMS Meeting, BARC, 03 Aug 12

12 Aluminum patch panels fabricated for 200 chambers Responsible : Manish Kumar, MDPDD BARC 12

13 13

14 Cu plates (DHP) cutting, bending and drilling : BARC, Mumbai DHP copper being used for the plates and pipes (semi hard) DHP : Deoxidized High Residual Phosphorous 14

15 Cu pipes (semi hard) soldered to Cu plates (Sn : Ag : Pb :: 62 : 2 : 200 o C) MDPDD BARC, Mumbai Cu cooling set on jig while soldering Finished product (for type RE4/3) undergoes leak test with Argon at 20 bar 15

16 16

17 Cu cooling system for 200 chambers Cu cooling circuits for the first 30 chambers under fabrication at Mumbai : RE4/2 type 10 sets for Mumbai Being fabricated RE4/3 type 05 sets for CERN & Completed RE4/2 type 05 sets for CERN & Being fabricated RE4/3 type 10 sets for Ghent Completed Delivery to CERN and Ghent expected by end September 2012 Fabrication of remaining 170 sets, to be completed in a phased manner, by end March

Leak test of Cu cooling system @ NPD BARC

18 Leak test of Cu cooling NPD BARC Pressure transducer Temp and RH sensor 18

19 Outlet Pressure 20 bar Inlet pressure 80 bar Safety release 0 35 bar pressure transducer Argon gas Cu tube pinched at one end 19

20 Leak test of Cu system RE4/3 001 at NPD BARC 05 April minutes data Pressure (bar) Time (sec) 20

21 Pressure (bar) and Temperature ( o Celsius) Leak test of Cu system RE4/3 001 at NPD BARC 05 April minutes data Time (data points for each minute) Pressure Temp 21

22 Plexi glass spacers for guiding the coaxial cables only for 50 RE4/2 chambers being built in India 22

23 Transportation trolley for ten RPCs Total weight for 10 RPCs : 800 kg Gross weight : 1000 kg 23

24 Arrival of mechanics : Feb 2012 Engineering support from MDPDD VME DAQ and TDCs The road map : RPC budget Signals from single GEM foil L. M. Pant 24 India CMS Meeting, BARC, 03 Aug 12

25 RPC characterization software We are waiting for the final version to be confirmed from CERN for implementation at BARC Hodoscope set for simultaneous testing of three RPCs and three gas gaps for HV scan 3 x V1190A, 128 multihit TDCs implemented in the software The signals from scintillators and the trigger also implemented in the software HV scripts being tested for stability tests : 120 h Minor bugs to be rectified 25

26 VME based DAQ 1 x CAEN V2718 VME bridge 3 x TDC modules CAEN V1190A 128 LVDS input channels The flat cables from 3 RPCs mate with the flat cables from TDC on a patch panel 26

2D plot : Timing (ch # X axis) vs TDC ch # (Y axis) Responsible : Renju & Raman, NPD BARC TDC Channel numbers (0 to 127) 96 read outs from CMS RPC TDC ch # 32 to 127 Two strips

27 2D plot : Timing (ch # X axis) vs TDC ch # (Y axis) Responsible : Renju & Raman, NPD BARC TDC Channel numbers (0 to 127) 96 read outs from CMS RPC TDC ch # 32 to 127 Two strips not firing Few strips very noisy Master Trigger TDC ch # o/p from scintillators in the hodoscope TDC ch # 0 15 Timing (ch #) L. M. Pant 27 India CMS Meeting, BARC, 03 Aug 12

28 Time profile of CMS RPC strips 28

29 Arrival of mechanics : Feb 2012 Engineering support from MDPDD VME DAQ and TDCs The road map : RPC budget Signals from single GEM foil 29

QC for chamber assembly Production on three different sites :

setting up protocols for QA / QC Common technical specification

the three sites Detailed DB for production and test in

30 QC for chamber assembly Production on three different sites : CERN, GHENT, BARC CERN site (904) will coordinate logistic & setting up protocols for QA / QC Common technical specification and protocols for production and QC discussed and agreed among the three sites Detailed DB for production and test in preparation CERN 904 BARC GHENT 10 RPCs per month 3 RPCs per month 5 RPCs per month 30

31 Delivery of gas gaps, other accessories Tentative delivery of accessories from CERN Aug end Tentative arrival of RE4/2 gas gaps from KODEL Sep end T o for chamber assembly and characterization starts Initially 3 RPCs per month 10 RPCs by Jan 2013 to CERN for SM assembly 31

32 RE4 Super Module preassembled 10 degree sector 32

33 RE4 Super Module (RE4/2 + RE4/3) : Prototype RE 4/3 RE 4/2 33

34 Arrival of mechanics : Feb 2012 Engineering support from MDPDD VME DAQ and TDCs The road map : RPC budget Signals from single GEM foil L. M. Pant 34 India CMS Meeting, BARC, 03 Aug 12

35 HV and LV systems BARC and PU (160 kchf for each institute) Multichannel Power Supply (SY1527) Branch Controller (A1676A) HV AC to DC Convertor (A3485) LV MAO AC to DC Convertor (A3486) HV Module (A3512N) LV Module (A3009) EASY3000 Front Side EASY3000 Back Side 35

36 Installation and Commissioning : ( ) India will contribute to 20 man months during installation and commissioning phase BARC will contribute PU will contribute : 5 man months for Installation : 5 man months for Commissioning : 5 man months for Installation : 5 man months for Commissioning 36

37 detector contribution from India for RE4 upgrade : 400 kchf 20 man months from India to be shared equally between BARC and PU 10 man months for Installation & 10 man months for Commissioning kchf BARC + PU detector 37

38 Thanks! 38

39 Arrival of mechanics : Feb 2012 Engineering support from MDPDD VME DAQ and TDCs The road map : RPC budget Signals from single GEM foil L. M. Pant 39 India CMS Meeting, BARC, 03 Aug 12

40 1 2 3 Anode plane : 256 ch in 10 cm 6 GEM foil : 10 cm x 10 cm 5 GEM foil on a frame 4 Drift plane over the GEM foil Drift plane : 10 cm x 10 cm GEM foil over the anode plane 7 Sealing with capton foil 8 Single GEM ready for testing Single GEM assembled at NPD, with Anode plane, GEM foil and the Drift plane 40

41 Single GEM with voltage divider, gas flow in RPC Lab., NPD with P10 gas Ar + CO 2 online gas mixer installed on 14 July

42 Responsible : Renju, NPD BARC 42

43 43

44 44

45 pseudorapidity, = ln tan( /2) Is the polar angle of the particle wrt the beam axis 45

46 Trigger efficiency : existing end caps 46

47 simulated trigger efficiency plot : Piet Verwilligen 47

48 Phase I : Upgrades Currently running CMS detector : low luminosity detector To increase the physics potential at higher luminosities of 1 2x10 34 cm 2 s 1 Upgrades are proposed (CERN RRB ) M CHF Magnet Tracker HCAL Muon M CHF CSC DT RPC 48

arxiv: v1 [physics.ins-det] 1 Jul 2014

arxiv: v1 [physics.ins-det] 1 Jul 2014 Construction and test of high precision drift-tube (smdt) chambers for the ATLAS muon spectrometer arxiv:1407.085v1 [physics.ins-det] 1 Jul 014 Sebastian NOWAK E-mail: nowak@mppmu.mpg.de Oliver KORTNER