Study of some aspects of straw tube detectors for CBM-MuCh
S. Roy1, R. P. Adak1, S. Biswas1∗, S. Chattopadhyay2, S. Das1,
D. Ghosal3‡, S. K. Ghosh1, A. Mondal4, D. Nag1, D. Paul5,
S. K Prasad1, S. Raha1, J. Saini2
1Bose Institute, Department of Physics and CAPSS, EN-80, Sector V, Kolkata-700091, India
2Variable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata-700064, India
3Indian School of Mines, Dhanbad , Jharkhand-826 004, India
4Department of Physics, University of Calcutta, 92, APC Road, Kolkata-700 009, India
5Ananda Mohan College, 102/1, Raja Rammohan Sarani, Kolkata - 700 009, India.
The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt, Germany is designed to explore the QCD phase diagram in the region of moderate baryon densities. This will only be possible with the application of advanced instrumentation, including highly segmented and fast gaseous detectors. Keeping in mind the high interaction rate at FAIR, the Muon Chamber (MuCh) detector in CBM will use Gas Electron Multiplier (GEM) chambers in the first two stations and straw tubes are the candidates for the 3rd and 4th stations.
We have carried out R&D with one small straw tube detector and the efficiency and gain have been studied with premixed gas of Ar/CO2 70/30. The count rates are measured with different radioactive sources. The attenuation of signal and the variation of gain with rate are also measured. The details of the measurement process and the experimental results will be presented.
‡ Now at Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland