Our experimental high-energy physicists group has traditional work using nuclear emulsion technique. We have published about more than 120 papers in the reputed national/international journals on various interesting features of multiparticle production in hadron-hadron, hadron-nucleus and nucleus-nucleus collisions. Presently our group is engaged in an International collaboration ALICE (A Large Ion Collider Experiment). In this collaboration about 900 Physicists/Engineers from 27 countries, including France, U.K., Italy, Germany, and Russia are involved. The main aim of the collaboration is to search for the production of Quark-Gluon-Plasma in lead-lead collisions at LHC (CERN, European Centre for Particle and Nuclear Research) energies. We, along with the High Energy Physicists of Saha Institute of Nuclear Physics (SINP), Kolkata have designed and fabricated the second station of the Di-Muon Spectrometer for the ALICE at LHC, CERN. We are also engaged in CBM experiment at FAIR, GSI, Darmstd, Germany.  We are also sharing the  responsibilities of addressing the simulation, optimization of geometry and material and its physics performance of muon detector system, MuCh of CBM at FAIR for different bombarding energies.