slide1
Download
Skip this Video
Download Presentation
RPC Upscope : An overview with Indian perspective

Loading in 2 Seconds...

play fullscreen
1 / 24

RPC Upscope : An overview with Indian perspective - PowerPoint PPT Presentation


  • 97 Views
  • Uploaded on

RPC Upscope : An overview with Indian perspective. L. M. Pant Nuclear Physics Division Bhabha Atomic Research Centre. L. M. Pant India-CMS Meeting, BARC 29 th July 2010.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' RPC Upscope : An overview with Indian perspective' - noe


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

RPC Upscope :

An overview with Indian perspective

L. M. Pant

Nuclear Physics Division

Bhabha Atomic Research Centre

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide2

The first level trigger based on the RPCs provides CMS with the most precise timing in both the barrel and endcap region

Six concentric layers of chambers are used in the barrel part, while

four layers have been foreseen in total for the end caps to cover a rapidity up to =2.1

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide3

barrel

end-cap

end-cap

CMS

Present

end-cap

RPC

coverage

upto

 3 layers

High  region

FRPC upgrade

2011(?)

666 cm

Longitudinal section of CMS

pseudorapidity,  = - ln tan(/2)

 Is the polar angle of the particle wrt the beam axis

Trigger detector

RPC’s : both Barrel & End-Cap :  = 0 to 2.1

Tracking detector

Barrel : Drift Tubes :  = 0 to 1.2

End-cap : Cathode Strip Chambers :  = 0.9 to 2.1

RPCs are segmented in strips of   x   ~ 0.1 x (5/16)o

which makes possible a pT measurement of ~ 50 GeV

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide4

=0

due to insufficient funding availability, only three layers were built in the endcap which provided a limited rapidity coverage up to =1.6

=1.2

=1.6

China

end-cap

end-cap

barrel section in 5 wheels

Pakistan

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide5

chambers could be constructed later on so that coverage of the full rapidity range of the original design could be achieved

The key element of this proposal is to construct the 4th layer of RPCs in the endcap

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide6

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

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide7

The key element of this proposal is to construct the 4th layer of RPCs in the endcap

=0

=1.2

=1.6

China

end-cap

end-cap

barrel section in 5 wheels

Pakistan

India & Belgium

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide8

CMS has decided to split the up-scope project into two distinct phases :

Phase 1 :

completion of the low  part ( < 1.6)

Phase 2 : (earlier called as upgrade)

completion of the high part (1.6 <  < 2.1)

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide9

Second layer of gas-gaps with gas flow pipes

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide10

Bakelite gas-gaps enclosed inside the Faraday Cage

April \'2008

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide11

Fully assembled RPC with front end electronics, gas flow pipes, cooling pipes, HV and signal cables

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide12

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide13

96

65

64

33

32

1

Not dead channels, problem with shift registers in the electronics

Strip profile of cosmic events : 5K triggers

RPC # 6, run No. 5135, 5K triggers at 9.4 kV

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide14

presented during RPC-2010 at GSI

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide15

presented during RPC-2010 at GSI

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide16

Expected financial contribution for low  upgrade

4.5 MCHF

18%

India

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide17

~1000 kCHF

per sector

( end caps)

~ 800 kCHF

per sector

( end caps)

 ~ 1.2

 ~ 1.6

Cost per sector for low  (RE2/2, RE2/3)

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide18

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide19

RPCs to be built for low  upgrade

144 + 56 extra = 200

BelgiumIndia

100 + 100 = 200 RPCs

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide20

The manpower to run this facility will be provided by the respective institutes when their detectors are being tested

Chamber Assembly Sites

Mumbai,

Chandigarh

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide21

Responsibitities of each collaborating unit

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide22

July’10

Aug ’10

Oct ’10

Dec ’10

Dec ’11

We

are here

HPL production

Start up for

production of

gas-gaps,

mechanics,

electronics

Assembly sites

to be ready

Testing,

Comissioning

& Complete

Installation

The road map

HPL : 2 months are required for the production of

600 foils x (1620 x 3200 mm2) = 3110 m2

Gas-Gaps : production of 600 gas-gaps for 200

chambers would take about 12 months

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide23

Summary

  • Ten RPCs sent to CERN are certified “Cosmic test OK”
  • RPC lab., at NPD-BARC is fully equipped to undertake
  • the assembly and testing following the QA/QCs as set by
  • CMS-RPC group
  • The Panjab University RPC lab is also equipped
  • with a 4-channel gas-mixing unit,
  • DAQ for the Cosmic Ray test,
  • scintillator hodoscopes,
  • mechanical and electrical workshops,

L. M. Pant India-CMS Meeting, BARC 29th July 2010

slide24

Outlook

  • A/C with dehumidifiers for the RPC lab. at NPD-BARC
  • (civil work to start; commissioning by Dec. 2010)
  • Large area scintillator (18 cm x 200 cm) paddles for chamber
  • efficiency, cluster size and strip profile measurements
  • (to be ready by Nov. 2010)
  • VME based DAQ for 96 channels to measure all physical working
  • parameters for the chambers
  • (operational by March 2011)
  • Once the chambers are assembled, a complete test with a
  • cosmic hodoscope will be performed before the transportation
  • to CERN
  • Fabrication of a new cosmic rack (ready by Dec 2010)
  • the present cosmic rack to be used as a storage device
  • The Panjab University RPC lab. is also ready
  • (fully functional by Dec., 2010)

L. M. Pant India-CMS Meeting, BARC 29th July 2010

ad