CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

CBM Activities CBM Activities @@ BBanaras anaras HHindu indu UUniversityniversity

Arun Arun PrakashPrakashDoP, BHUDoP, BHU

(For Banaras Group)(For Banaras Group)

Out line:Out line:

Present &Present &

FutureFuture

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Present: SoftwareSoftware

CBM_Root simulation software installed and working

Ready to start detector simulation

Two graduate students are working

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Present: HardwareHardware

Part of MuCh (Muon Chamber)

Developing GEM (Gas Electron Multiplier) Detector R & D Lab

Order placed for necessary equipments

Procuring lab accessories

Mean while with the help of other lab started studying ageing effect of GEM

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Photon ageing

Accumulated charge (uC/mm2) Wavelength [nm]

Q.E

[%

]

B.K. Singh et al., NIM A 581 (2007) 651

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Surface morphology (AFM Technique)

Before Photon ageing After 5 days of photon ageing

B.K. Singh et al., NIM A 581 (2007) 651

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

PEEM & AFM images of aged CsI

B.K. Singh et al., NIM A 581 (2007) 651

40 um

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Manufactured by standard PCB techniques of precise drilling drilling in G-10 (+ other materials) and Cu etching. Cu etching.

ECONOMIC & ROBUST!ECONOMIC & ROBUST!

0.1mm rim: prevents discharges high gains!

0.1mm

Cu G-10

Hole diameter d=0.3 - 1 mmDistance between holes a=0.7- 7 mmPlate thickness t=0.4 - 3 mm

THGEMTHGEMStandard GEMStandard GEM

1mm

105 gain in single-TGEM

Chechik et al. NIM A535 (2004) 303Shalem et al. NIM A558 (2006) 475

F. Sauli (CERN)

103 gain in single-GEMBreskin/weizmann

MICROPATTERN DETECTORSMICROPATTERN DETECTORS

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Future:-Future:- SoftwareSoftware

• Very soon we will start simulation Very soon we will start simulation study of absorbing materials in study of absorbing materials in MuCHMuCH

• Plan for other detector and Plan for other detector and physics simulationsphysics simulations

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Future:-Future:- HardwareHardware

We will study:-We will study:-

Ageing effects

R&D for TH-GEM

CBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun PrakashCBM Meeting @ Jammu University Feb. 12-16, 2008 by Arun Prakash

Conclusion:-Conclusion:-

Activities started @ BHU

Soon full fledge activity will start for CBM