Speaker
Description
Gaseous detectors are widely used in High Energy Physics (HEP) experiments for their moderate to high rate handling capability, good position and time resolution, and cost-effectiveness. At Bose Institute, Kolkata, performance studies are carried out on several gas filled detectors such as Gas Electron Multiplier (GEM), Resistive Plate Chamber (RPC) and Straw Tube detector, under controlled laboratory conditions.
For GEM chambers and Straw Tube detectors, stability studies are performed using a strong radiation from $^{55}\mathrm{Fe}$ source having characteristics energy of 5.9 keV with Argon and CO$_2$ gas mixtures in different volume ratios, focusing on the influence of ambient parameters and impact of continuous radiation on gain and energy resolution. X-rays from a radioactive source are used both to irradiate the detector and to monitor the energy spectra for gain and energy resolution estimation. Variation of gain and energy resolution in Argon/CO$_2$ gas mixture under X-ray irradiation is discussed, and the time resolution achievable with cosmic rays as a trigger for the same gas mixture is also estimated.
In HEP experiments, Resistive Plate Chambers are used as tracking devices for their good timing resolution (ns). A new fabrication technique is introduced, where linseed oil coating is applied to the bakelite plates before assembling the gas gap. A prototype RPC is tested in avalanche mode with $100\%$ Tetrafluoroethane gas and cosmic rays, and its efficiency, noise rate, time resolution, effect of radiation are measured using conventional NIM electronics. The details of the experimental setup, methodology and results will be reported here.
| Position | Senior Research Fellow |
|---|---|
| Affiliation | Bose Institute , Kolkata |
| Country | India |