India CMS Meet DU 24Jan08 NPD Pant

Mechanical Assembly of RPCs Status Report

L. M. Pant India-CMS Meeting, Delhi University 24 th & 25th Jan., 2008

L. M. PantNuclear Physics Division, BARC

RPC Lab. @ NPD-BARC

SN Item Description Quantity Order placed with

Amount Amount in Rs.

1 Honey Comb Panels 12 Beijing BAMTRITech. & Devp. Co.

USD 7,000 Rs. 2,80,000/-

2 Cu + Mylar sheets for Faraday Cage, Read out strips, ferrules

12 Beijing GaoNengKedi Science & Tech. Co. Ltd.

USD 7,500

Rs. 3,00,000/-

3 FEBs 36 Matrix, Italy Euro 7,800

Rs. 4,68,000/-

4 Gaps (3 x RE*/3) 9 CMS, CERN Free -

5 Gaps (9 x RE*/2) 27 KODEL, Korea USD8,500

Rs. 3,40,000/-

6 cable, connectors, modules, shipping etc.

Rs. 2,00,000/-

7 Minor fabrications Rs. 4,00,000/-

8 Distribution Boards(order to be placed)

12 Matrix, Italy Euro960

Rs. 57,600/-

9 Despatch, Insuarance, invitation etc.

Rs. 2,00,000/-

TOTAL Rs. 22,45,600/-

The Final Tally : Estimate ~ 35 Lakhs; Actual ~ 23 Lakhs


Minor Fabrication Jobs / Procurements


• Aluminum Screen box Complete Delivered

• Al Jigs for gas-pipes Complete Delivered gas pipes configured

• Transportation Crate Complete Delivered

• Cu cooling pipes Under Delivery by requiredFabrication mid Feb at the end

• Perspex spacers Under Delivery byFabrication Jan end

• Al Clamps, Al Angles Under Delivery byFabrication Jan end

• Mylar Insulation / nuts & bolts Procured

Gas leak tests for gas-gaps

MANOMETER

few gas nozzles were found clogged because of dried up linseed oil


Leakage Current measurements : gas-gaps

SN

Date gas-gaps characterised

Total

1 Sep ‘07 9 9

2 Oct ‘07 8 17

3 Jan ‘08 17 34

A) 9 GT gas-gapsB) 30 KODEL gas-gaps

Total of 39 gas-gaps arrived by Sep. ‘07

5 gas-gaps left to be characterised

Should be over by Jan end

Mechanical assembly in progress

KODELgas-gaps


Effect of different gas mixtures (bakelite GT gas-gaps)

( 5 : 20 : 75 )


Relocation of HV slots (precision job) at Centre for Design and Manufacture (CDM), BARC


Relocation of HV slots (precision job) at Centre for Design and Manufacture (CDM), BARC

relocated slot


Coaxial signal cables with adaptor cards : for 12 chambers

Patale, BARCAbhinav, DUSupreet, PUArchana, PU


40 pin Twisted pair cables for the FEBs : for 12 chambers


Sachi, BARCSandhya, DUShilpi, DUSudha, DU

Mechanical assembly of RPCs in progress

Mylar insulation

Cut Honey Comb Panel

Cut Faraday Cage

Cut gas-gap

Honey Comb Panel

Mylar insulation

Faraday Cage

Large gas-gapCu read out

Coaxial cables


FEBs, Twisted Pair Cables and cooling pipes for the electronics


Minor Fabrication : Al Screen box


Minor Fabrication : Transportation Crate for RPCs


Small sized RPC (RE*/2)

• almost all pre-assembly jobs are over(i) screen boxes(ii) Cu cooling pipes(iii) Al angles, L clamps(iv) thermoformable gas-pipes configured(v) perspex spacers

• mechanical assembly in progress (should be over by Feb. end)

• soldering of co-axial signal cables to the read out strips to start (2500 soldering points – delicate job )

• FEB installation and testing (to start by March 2008)

• Efficiency measurements (March/April 2008)

• Packaging and despatch (May - June 2008)

Summary and Outlook - I


Summary & Outlook - II

• Order for Distribution Boards asap We have two of them for the moment • NPD-BARC, plans to invite Cai from China during the assembly process

• Abstract submitted to RPC 2007 on behalf of India-CMS-RPC collaboration

• CMS-RPC meeting on 12 Feb. (Tuesday), a day prior to RPC 2007, IX International Workshop on RPC, at TIFR

• RPC Phone meeting on 23rd January (Wed.)


RPC Phone Meeting on 23rd Jan., ‘’08 (Wed) : 90 minutes

Attended by Walter, Archana and Ian at CERN

and joined by people on phone from

Italy (Pino), China, Korea, Pakistan (Hasan) and India (Lalit)

• All relevant RPCs are underground and 3-4 people are required immediately and urgently for commissioning. • Six high rate RPCs for the high eta region from Korea are at CERN to understand the technology for FRPC upgrade. Details to be presented on 12th Feb.

• Status of RPCs for CMS in India and delivery schedule was discussed. Performance of fresh KODEL gas-gaps.

• 12 Feb meeting (airport pickup for delegates on 11th Feb ?).


Assembly, testing and production of bakelite RPCs for the end-cap region of the Compact Muon Solenoid experiment at CERN

The Final Assembly

The Cosmic Stand for characterising the gas-gaps, leakage current and efficiency measurements

RPCs can operate either in avalanche or streamer mode and accordingly need a proper mixture of Argon, Isobutane, RE134A and SF6 gases in a required proportion

1 to 8 channel flow divider with safety bubblers & dew point meter

References :[1] R. Santonico et. al. NIM 187 (1981) 377[2] INO Project Report INO/2006/01[3] J. Va’vra et. al. IEEE, Vol. 51, No.5, 2004

The infrastructure

Outlook• gap making technology

Resistive Plate Chambers are low cost detectors used in avalanche or streamer mode in various experiments both with cosmic rays and accelerators. They will play an important role for the generation of first level muon trigger at CMS and ATLAS at LHC [1]. 27,000 RPCs, each measuring 2m x 2m in area are required for the INO project [2]

RPC 2007, IX International Workshop on Resistive Plate Chambers and related Detectors, Tata Institute of Fundamental Research, Mumbai, India, February 13-16, 2008

Four channel on-line & pre-mix gas distribution system with purifiers and MFCs at NPD-BARC for Argon, Isobutane, RE134A and SF6

The pre-assembly jobs

relocated slot

MANOMETER

L. M. Pant1,*, A. K. Mohanty1 , P. Shukla1 , D. Dutta1 , V. Kumar1 , P. Patale1, S. D. Tripathi1, S. Kailas1 , R. K. Choudhury1 ,

S. Pal Singh2, A. Sharma2, ______________

A. K. Dubey3, Shilpi Jain3, Sandhya Jain3, Sudha Ahuja3, _______

1 Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai, India2 Department of Physics, Panjab University, Chandigarh, India

3 Department of Physics and Astrophysics, Delhi University, Delhi, India*email : [email protected]

on behalf of India-CMS collaboration

mailto:[email protected]

L.M.Pant India-CMS Meeeting, Delhi University 27th Sep. 2007

OptionsWe just keep waiting for funds approval till Dec end and can then happily say that funds were not made available in time

OR

We vigourously pursue it during the next few months with DST and get the approval

No funding by Dec end : We forget the issue(the best solution perhaps !! ??)

If funding comes : then how to ?Clearly, now this is a University call and

the Universities have to take the lead

It is being demonstrated how to go about

L.M.Pant India-CMS Meeeting, Delhi University 27th Sep. 2007

India CMS Meet DU 24Jan08 NPD Pant

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