AR_final file_2018-19

THE COSMIC RAY MUON DETECTOR (CRMD) The Cosmic Ray Muon Detector (CRMD) is a particle detector, which can detect and observe products of cosmic ray particles, which were created and accelerated by very violent mechanisms in the Universe. The CRMD at IUCAA Radio Physics Lab is one of its kind, and was built in 2011 by Bachelor degree level students. It is the only detector of its type running in entire Asia. The material to build the detector was imported from Fermi Lab (USA). This detector is used to take readings of constant muon flux and determine mean muon lifetime. It is quite a rich experiment as it enables students to not only study astroparticle physics, but also quite a lot about nuclear and particle physics in general. Mean muon lifetime also serves as a test for Einstein’s special theory of relativity. Since 2012, the detector has been used for experiments in Savitribai Phule Pune University, MSc Astronomy and Astrophysics specialization course as well in Radio Astronomy Winter School. RAMAN SPECTROSCOPY The Raman Spectroscopy is one of the important tools in physics and chemistry to identify the elements. Raman Spectroscopy is an inelastic scattering of mono-chrome light, at which frequency of light changes upon interaction with a sample. Frequency of the re- emitted photons is shifted up or down in comparison with original mono-chromatic frequency, which is called the Raman Effect. This shift provides information about vibrational, rotational, and other low frequency transitions in molecules. Raman Spectroscopy can be used to study solid, liquid and gaseous samples. In this experiment, we see the stokes and anti-stokes line on both side, and the Raman scattering. A powerful green (532 nm) laser, and astronomical grade cool CCD camera are used to detect the Raman scattering. NOISE FUNDAMENTAL EXPERIMENT The Noise Fundamental Experiment is one of the most important tools to study the noise in any electronic system and instrument. The noise present in all electronic signals limits the sensitivity of many measurements. The thermal noise generated by a resistor at room temperature or the shot noise in diode and transistor can be studied by using this setup. The noise can be observed on the display of an oscilloscope and also manipulate it by changing the parameter of noise like temperature, bandwidth and other parameters. ( 163 )