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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-8566
DTSTART:20240118T163000Z
DTEND:20240118T173000Z
DTSTAMP:20260413T223354Z
LAST-MODIFIED:20240108T212204Z
LOCATION:https://us06web.zoom.us/j/84177510355?pwd=UnhVWHdPeW1CQ1FtYmk
 1VXBYZzhIdz09
SUMMARY:Probing Cosmic Ray Physics at TeV-PeV Energies with GRAPES-3 E
 xperiment \, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Pravata Kumar
  Mohanty\, Tata Institute of Fundamental Research\, Mumbai
DESCRIPTION:The GRAPES-3 experiment located in Ooty\, India employs a 
 dense array of plastic scintillator detectors and a large area muon de
 tector to measure all charged particles and muonic components in cosmi
 c ray showers\, respectively. Recently\, we reported the measurement o
 f the proton spectrum of cosmic rays from 50 TeV 1.3 PeV\, with a sign
 ificant hardening observed at around 166 TeV. The new feature contradi
 cts the long-held belief that the cosmic ray spectrum follows a single
  power-law up to the knee energy and may require more complex models s
 uch as those where classes of sources with different cutoffs contribut
 e to the flux. Additionally\, we have reported the observation of two 
 significant small-scale anisotropic structures in the cosmic ray arriv
 al distribution\, consistent with the observations of HAWC and ARGO-YB
 J experiment. In this talk\, I will provide an overview of the GRAPES-
 3 experimental setup\, discuss the above mentioned results\, and tell 
 about the ongoing upgrade activities and future plans.
URL:https://www.physics.wisc.edu/events/?id=8566
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