Astronomy Laboratory

An Astronomy laboratory has been set up at CBS. In its initial phase, it has three experiments as follows:

1. Measuring flux of relativistic mu-mesons using a Scintillation Counter – Cerenkov Counter Coincidence telescope :

The instrumentation which is required for this experiment is a scintillator, Cerenkov radiator, Photomultipliers, preamplifiers, post amplifiers, Counter and high voltage unit. Other electronic circuits like threshold discriminators, coincidence circuits are in the form of NIM Modules. A mechanical structure for housing the two detectors has been fabricated in the WRIC workshop.

2. Proportional Counter as x-ray Detector :

This experiment utilizes a proportional counter. A turbo-molecular pump based vacuum cum gas filling line and a P-10 gas cylinder have also been fabricated / procured and connected to the proportional counter. A Multi-Channel Analyzer his used to analyze output signals to construct the energy spectrum. Two radioactive sources (a) Iron-55 (Fe- 55) that emits 5.9 keV mono-energetic x-rays and (b) Cadmium – 109 (Cd-109) that produces 22.2 keV x-ray line have also been received. The proportional counter will be filled with gas mixture of 90% Argon + 10 % Methane (called P-10 Gas) at different pressures and detector characteristics like gas gain, energy resolution etc. and their variation with HV , gas pressure etc will be studied by shining x rays from radioactive sources. Another experiment will be to determine Mass Absorption Coefficient of different elements at specific x-ray energies by measuring absorption of x-rays of known energy.

3. Cadmium-Zinc-Telluride (CZT) Detector based x-ray Spectrometer :

This is a new generation solid state detector that works at temperatures in the range of + 10º C to -20º C by cooling by a thermoelectric cooler. Its energy resolution (R) is superior to that of a PC. Using x-ray lines of different energies its R will be studied at different energies and variation of R with energy will be measured and its dependence on different parameters of CZT will be inferred.


UM-DAE Centre for Excellence in Basic Sciences
"Nalanda", Opp Nano Sciences Building,
University of Mumbai, Vidyanagari,
Mumbai 400098, India.
Phone: 91-22-26532132
Telefax: 022-26532134
General Enquiries: This email address is being protected from spambots. You need JavaScript enabled to view it.
Website Related: This email address is being protected from spambots. You need JavaScript enabled to view it.

About Us

CBS was set up by the Department of Atomic Energy and the University of Mumbai in 2007. CBS offers a 5 year integrated MSc program in Basic Sciences, with undergraduate teaching embedded in a postgraduate and research environment, for students who have completed 10+2 schooling or its equivalent.