Saikat Biswas - Academia.edu (original) (raw)
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Study of the stability of gain and energy resolution for a triple GEM detector has been performed... more Study of the stability of gain and energy resolution for a triple GEM detector has been performed under continuous radiation of X-ray with high rate, using premixed gas of Argon and CO2 in 70/30 ratio and conventional NIM electronics. A strong Fe X-ray source is used for this study. The novelty of this study is that for the stability test same source is used to irradiate the GEM chamber and to monitor the spectrum. The radiation is not collimated to a point but exposed to a larger area. Effect of temperature and pressure on these parameters are also studied. The detail method of measurement and the first test results are presented in this article.
The proposed India-based Neutrino Observatory (INO) [1] is being planned with an aim to determine... more The proposed India-based Neutrino Observatory (INO) [1] is being planned with an aim to determine precisely the oscillation parameters using atmospheric neutrinos. In INO, the Resistive Plate Chambers (RPC) [2] have been chosen as the active detector for the detection of muons (produced through the interaction of neutrinos) in a 50 kton Iron Calorimeter (ICAL). One requirement for the RPC for INO is to have a time resolution ∼ 2 ns to discriminate the tracks of the up coming and down going neutrinos. During the last few years R&D on the RPC with bakelite paper laminates commercially available in India is going on at SINP/VECC. The work was initiated by the use of 2 mm thick matt finished P-120 grade bakelite for fabricating the RPC modules of dimension 30 cm × 30 cm. The application of a thin coating of silicone fluid (chemical formula : [R2SiO]n, where R = organic groups such as methyl, ethyl, or phenyl) [coefficient of viscosity = 5.5 Pa.s at 23◦C, manufactured by Metroark Limited...
Virginia Journal of Business, Technology, and Science, 2021
Bose Institute is Asia’s first modern research centre devoted to interdisciplinary research and b... more Bose Institute is Asia’s first modern research centre devoted to interdisciplinary research and bears a century old tradition of research excellence. In the experimental high-energy physics (EHEP) detector laboratory of Bose Institute, Kolkata, we are working on the R&D of Gas Electron Multiplier (GEM), straw tube detector for future heavy ion physics experiments and also developing low resistive bakelite Resistive Plate Chamber (RPC), keeping in mind high particle rate handling capacity. The main goal of our research program is the stability study and ageing study of gaseous detectors mentioned above. In this review article, the details of the R&D program of GEM detector, straw tube and RPC detectors carried out during the last five years is reported.
Nuclear Instruments and …, 2009
In this paper we would like to present a few characteristics of the Resistive Plate Chambers (RPC... more In this paper we would like to present a few characteristics of the Resistive Plate Chambers (RPC) made of a particular grade of bakelite paper laminates (P-120, NEMA LI-1989 Grade XXX), produced and commercially available in India. This particular grade is used for high voltage insulation in humid conditions. The chambers are tested with cosmic rays in the streamer mode using argon, tetrafluroethane and isobutane in 34:59:7 mixing ratio. In the first set of detectors made with such grade, a thin coating of silicone fluid on the inner surfaces of the bakelite was found to be necessary for operation of the detector. Those silicone coated RPCs were found to give satisfactory performance with stable efficiency of > 90% continuously for a long period as reported earlier. Results of the crosstalk measurement of these silicone coated RPC will be presented in this paper. Very recently RPCs made with the same grade of bakelite but having better surface finish, are found to give equivalent performance even without any coating inside. Preliminary results of this type of RPCs are also being presented.
Study of the stability of gain and energy resolution for a triple GEM detector has been performed... more Study of the stability of gain and energy resolution for a triple GEM detector has been performed under continuous radiation of X-ray with high rate, using premixed gas of Argon and CO2 in 70/30 ratio and conventional NIM electronics. A strong Fe X-ray source is used for this study. The novelty of this study is that for the stability test same source is used to irradiate the GEM chamber and to monitor the spectrum. The radiation is not collimated to a point but exposed to a larger area. Effect of temperature and pressure on these parameters are also studied. The detail method of measurement and the first test results are presented in this article.
The proposed India-based Neutrino Observatory (INO) [1] is being planned with an aim to determine... more The proposed India-based Neutrino Observatory (INO) [1] is being planned with an aim to determine precisely the oscillation parameters using atmospheric neutrinos. In INO, the Resistive Plate Chambers (RPC) [2] have been chosen as the active detector for the detection of muons (produced through the interaction of neutrinos) in a 50 kton Iron Calorimeter (ICAL). One requirement for the RPC for INO is to have a time resolution ∼ 2 ns to discriminate the tracks of the up coming and down going neutrinos. During the last few years R&D on the RPC with bakelite paper laminates commercially available in India is going on at SINP/VECC. The work was initiated by the use of 2 mm thick matt finished P-120 grade bakelite for fabricating the RPC modules of dimension 30 cm × 30 cm. The application of a thin coating of silicone fluid (chemical formula : [R2SiO]n, where R = organic groups such as methyl, ethyl, or phenyl) [coefficient of viscosity = 5.5 Pa.s at 23◦C, manufactured by Metroark Limited...
Virginia Journal of Business, Technology, and Science, 2021
Bose Institute is Asia’s first modern research centre devoted to interdisciplinary research and b... more Bose Institute is Asia’s first modern research centre devoted to interdisciplinary research and bears a century old tradition of research excellence. In the experimental high-energy physics (EHEP) detector laboratory of Bose Institute, Kolkata, we are working on the R&D of Gas Electron Multiplier (GEM), straw tube detector for future heavy ion physics experiments and also developing low resistive bakelite Resistive Plate Chamber (RPC), keeping in mind high particle rate handling capacity. The main goal of our research program is the stability study and ageing study of gaseous detectors mentioned above. In this review article, the details of the R&D program of GEM detector, straw tube and RPC detectors carried out during the last five years is reported.
Nuclear Instruments and …, 2009
In this paper we would like to present a few characteristics of the Resistive Plate Chambers (RPC... more In this paper we would like to present a few characteristics of the Resistive Plate Chambers (RPC) made of a particular grade of bakelite paper laminates (P-120, NEMA LI-1989 Grade XXX), produced and commercially available in India. This particular grade is used for high voltage insulation in humid conditions. The chambers are tested with cosmic rays in the streamer mode using argon, tetrafluroethane and isobutane in 34:59:7 mixing ratio. In the first set of detectors made with such grade, a thin coating of silicone fluid on the inner surfaces of the bakelite was found to be necessary for operation of the detector. Those silicone coated RPCs were found to give satisfactory performance with stable efficiency of > 90% continuously for a long period as reported earlier. Results of the crosstalk measurement of these silicone coated RPC will be presented in this paper. Very recently RPCs made with the same grade of bakelite but having better surface finish, are found to give equivalent performance even without any coating inside. Preliminary results of this type of RPCs are also being presented.