Center for Astroparticle Physics and Space Science (CAPSS)
At Bose Institute one of our main goals is the search for strangelets at
mountain altitude. Strangelets are nuggets of Strange Quark Matter containing
up, down and strange quarks in almost equal measure. The signature for
strangelets is their highly unusual charge to mass ratio (Z/A << ½) which gets
even more skewed as they travel through the earth’s atmosphere.
We are also in the process of setting up a large area (400 sq.m) passive etector array at Sandakphu at an altitude of 3600 m above sea level. Given the predicted flux of strangelets we are expecting 20 – 40 events of interest per year over the given area at that altitude.
We are in the process of setting up an active detector array system at Darjeeling in collaboration with TIFR, Mumbai for Air Shower studies. The objective is to find the nature of cosmic ray primaries i.e., the composition and energy spectrum of the particles coming from outer space in the PeV (1015 eV) energy range, to shed light on the origin of this very-high energy cosmic radiation and to search for point sources of UHE γ-rays (> 1014 eV) from periodic sources during γ-ray bursts. We plan to use this detector system in coincidence with the GRAPES-3 shower array of TIFR at Ooty in Tamil Nadu to detect extended showers. Initially we will set up an array of seven detectors each consisting of 1m2 plastic scintillator attached with a photomultiplier tube, which will later be extended to 50 detectors. We have acquired the necessary associated electronics. All equipments were tested and assembled. We have also gained experience in setting up the electronics for measuring coincident events at GRAPES array at Ooty.
|Faculty / Scientist||Student / RA|
|Sibaji Raha||Atanu Moulik|
|Sanjay K. Ghosh||Rupamoy Bhattacharyya|
|Partha Sarathi Joardar|
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