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Description
DEASA (Dayalbagh Educational Air Shower Array) is a ground based mini array to study Air shower phenomena at Dayalbagh Educational Institute[1], Agra in India located at 27.1767° N and 78.0081° E respectively and 170 m above sea level. It comprises 8 plastic scintillation detectors of dimensions (1 m x 1 m x 2 cm) and 2 prototype detectors of dimensions (23.5 cm x 24 cm x 2 cm). The total area covered by the array is 260 square meters.
. The pulse analysis of the prototype detectors has been done through the differential and integral pulse height spectra of MIPs (minimum ionizing particles) corresponding to amplitude peak values varying from 300 mV to 800 mV. The observational study of MIPs with respect to temperature of PMT is also interpreted. Generally MIPs are muons, one of the elementary particles reaching towards the earth at sea level, they are weakly interacting particles and traverse through the material by ionizing the medium of the material of the detector. When MIP traverses vertically through a plastic scintillation detector of thickness 2 cm, it deposits 3.15 MeV. These prototype detectors were used for calibration of the eight detectors in every six months by coincidence method.
Experimental observations involving count rate in hertz of MIPs using counter CAEN mod 1145 connected to NIM unit have been graphically analyzed [3]. The graphs have been plotted between count rates at different temperatures( deg. C) and pressure (hPa) monthly for almost half a year. Statistics play a major role in the analysis of count rates in particle astrophysics. The experimental observations have been fitted with a gaussian probability distribution function.
References
Measurements and simulations of secondaries with a detector station(s) using CAMAC data acquisition, Kajal Garg thesis defended in 2021.
Dam, K. & Eijk, B. & Fokkema, D. & Holten, J. & Laat, A. & Schultheiss, N. & Steijger, Jos & Verkooijen, J.. (2019). The HiSPARC Experiment.
Roy, S., Chakraborty, S., Chatterjee, S., Biswas, S., Das, S., Ghosh, S. K., ... & Raha, S. (2019). Plastic scintillator detector array for detection of cosmic ray air shower. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 936, 249-251.
| Session | Future Experiments and Detector Development |
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