Sk. Kothari et al., A CHARGED-PARTICLE TELESCOPE TO STUDY RELATIVISTIC ELECTRONS, SUB-RELATIVISTIC PROTONS AND MUONS, Astrophysics and space science, 202(1), 1993, pp. 21-32
A bi-directional charged particle telescope has been designed to disti
nguish electrons, muons and protons incident on the telescope from two
opposite directions and to measure the energy of particles which stop
in the central total energy detector of the system. This paper descri
bes the design, test and evaluation of the telescope using radioactive
sources, cosmic rays and low energy (8 MeV) electron beam from an acc
elerator. This telescope has been used in an experiment to measure the
flux and energy spectrum of low energy electrons in 5 to 24 MeV energ
y interval and protons in 70 to 110 MeV energy region in the upper atm
osphere. This experiment was carried out at high altitudes, using larg
e size scientific balloon over the city of Hyderabad, India in Dec. 19
84. Ground level low energy muon flux has been observed at Ahmedabad a
nd Hyderabad.