CENTRE OF PLASMA PHYSICS

Dr. S. R. Mohanty

Dr. S. R. Mohanty

Professor-G

Laboratory Head

Biography

Dr. Smruti Ranjan Mohanty joined CPP-IPR (formerly CPP) in 1998 as an Assistant Professor and was promoted to Fellow in 2000, Associate Professor-I in 2008, Associate Professor-F in 2014 and Professor-G in 2021. He received a Ph. D. degree in Physics from University of Delhi, Delhi in 1998. He had also received the BOYSCAST fellowship (2000), French Research Ministry Fellowship (2000-01) and Japan Society for Promotion of Science (JSPS) fellowship (2004-06). He was a Visiting Professor (Foreign Researcher) at the University of Toyama, Japan, for one month in 2009. His research interests include pinch plasma devices, plasma diagnostics, plasma radiation sources, pulsed laser deposition and plasma processing. He is author of about 45 research papers that are appeared in various referred journals such as Applied Physics Letters (APL), Journal of Applied Physics (JAP), Plasma Sources Science and Technology (PSST), Physics of Plasma (POP) and others. Three students earned Ph.D. degree under his supervision. He regularly reviews the articles submitted to various International Journals (APL, JAP, PLA, PSST, IEEE Plasma, PPCF etc). He has completed successfully two BRNS, DAE projects. He has contributed to French and Japanese national program on EUV Lithography during his postdoctoral research assignments.

Curriculum Vitae

Summary of Expertise

EUV Lithography Source:

Involvement on development work of EUV sources for Next Generation Lithography based on discharge produced plasma system (fast capillary discharge, gas jet type Z-pinch and hybrid plasma focus) that radiates mainly around 11 to 17 nm.

Experience on design and fabrication of blumlein generator, pulsed compression line, over voltage switches, capillary plasma system, mini-plasma focus, gas jet Z-pinch system etc.

Experience on testing and optimization of electrical and spectroscopic performances of discharge produced plasma EUV sources.

Plasma Focus Device:

Involvement on research activities on a Mather type Plasma Focus (PF) for last many years that is renowned for generating high temperature and high density plasma besides particle beams (electron and ion), EM radiation (X-ray, EUV, UV and visible) and neutrons.

Extensive experience on fabrication of high voltage power supply, triggering electronics, spark gap switches, nitrogen laser and simple diagnostics such as voltage probe, current probe, magnetic sensor, Langmuir probe, Faraday cup, pinhole imaging and advanced diagnostics like laser shadowgraphy, diode X-ray spectrometer, crystal spectrometer etc.

Studied the dynamics of current sheath of PF in presence of external magnetic field employing laser shadowgraphy technique.

Investigated X-ray emission of PF using diode X-ray spectrometer and X-ray pinhole camera.

Observed ion dynamics of PF using single and multiple Faraday cup arrangement and SSNTD.

Studied EUV emission from a miniature hybrid PF driven by ten kA current pulse.

Studied the electron beam current of PF using electron collector and Rogowski coil.

Studying proton and ion emission from PF using nuclear track detectors.

Plasma Processing:

Utilized energetic ions of PF for fabricating the POLYMER DIODE in polyaniline film.

Portrayed PF device as a suitable alternate of nitriding reactor by using it for hardening of steel.

Succeeded to prepare theoretically predicted material CARBONITRIDE (harder than diamond) on graphite substrate by using nitrogen ions of PF device.

Used energetic ions of PF for creation of color centers in American diamond.

Used electron beam of PF device to grow NANOWIRE of polyaniline at room temperature.

Studying protons and noble gas ions irradiation on materials that are of interest in tokamak reactor.

Laser Produced Plasma:

Studied optical emission spectroscopy of pulsed laser ablation plasma.

Utilized pulsed laser deposition technique to fabricate NANOMATERIAL of magnetic materials.

Inertial Electrostatic Confinement Fusion Device:

Designed and developed a portable NEUTRON source based on cylindrical inertial electrostatic confinement fusion device that operates in continuous mode.

Used a setup neutron diagnostics such as proportional counter, track detector, bubble detector, area monitor etc.

Neutron production rate up to 10⁶ n/sec is obtained at low 80 kV applied voltage.

Publications

Neutron and x-ray emission from a cylindrical inertial electrostatic confinement fusion device and their applications, D. Bhattacharjee, N. Buzarbaruah, S.R. Mohanty, Accepted for publication in Journal of Applied Physics, July 2021.

Basics of inertial electrostatic confinement fusion and its applications, S.R. Mohanty, N. Buzarbaruah, D. Bhattacharjee, D. Jigdung, AIP Conference Proceedings 2319, 030012 (2021).

Kinetic characteristics of ions in an inertial electrostatic confinement device, D. Bhattacharjee, N. Buzarbaruah, S. R. Mohanty, and S. Adhikari, Phys. Rev. E, Vol 102, 063205 (2020).

Surface and structural analyses of helium ion irradiated beryllium, N.J. Dutta, S.R. Mohanty, K.P. Sooraj, M. Ranjan, Vacuum, Vol. 170, 108962 (2019).

Studies on virtual electrode and ion sheath characteristics in a cylindrical inertial electrostatic confinement fusion device, D. Bhattacharjee, D. Jigdung, N. Buzarbaruah, S.R. Mohanty and H. Bailung, Physics of Plasma, Vol. 26 , 073514-7 (2019).

A Study on Neutron Emission from a Cylindrical Inertial Electrostatic Confinement Device, N. Buzarbaruah, S.R. Mohanty, E. Hotta, Accepted for publication in Nuclear Inst. and Methods in Physics Research, A (2018).

Self-organized Nanostructure Formation on the Graphite Surface Induced by Helium Ion Irradiation, N.J. Dutta, S.R. Mohanty, N. Buzarbaruah, M. Ranjan, R.S. Rawat, Physics Letters A, Vol. 382, 1601-1608 (2018).

Study on discharge plasma in a cylindrical inertial electrostatic confinement fusion device, N. Buzarbaruah, N.J. Dutta, D. Borgahain, S.R. Mohanty and H. Bailung, Physics Letters A, Vol. 381, 2391-2396 (2017).

Modification on graphite due to helium ion irradiation, N.J. Dutta, S.R. Mohanty, N. Buzarbaruah, Physics Letters A, Vol. 380, 2525-2530 (2016).

Design of a linear neutron source, N. Buzarbaruah, N.J. Dutta, J.K. Bhardwaz and S.R. Mohanty, Fusion Engineering and Design, Vol. 90 97–104 (2015).

Damage studies on tungsten due to helium ion irradiation, N.J. Dutta, N. Buzarbaruah and S.R. Mohanty, Journal of Nuclear Materials, Vol. 452, 51–56 (2014).

Plasma focus assisted damage studies on tungsten, M. Bhuyan, S.R. Mohanty, C.V.S. Rao, P. Rayjada, P.M. Raole, Applied Surface Science, Vol. 264, 674 (2013).

Neon assisted damage studies on tungsten for next generation fusion reactor, M. Bhuyan and S.R. Mohanty, Horizon-A Journal of Physics (ISSN 2250-0871) Vol. 3, 66-79 (2013).

Experimental evaluation of protons emission from a plasma focus device, M. Bhuyan and S.R. Mohanty, Journal of Plasma Physics, Vol. 78, 507 (2012).

Temporal and spatial study of neon ion emission from a plasma focus device, M. Bhuyan, N.K. Neog, S.R. Mohanty, C.V.S. Rao, P.M. Raole, Physics of Plasma, Vol. 18, 033101 (2011).