A5058100924- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Plasma Diagnostics and Applications
- Fusion materials and technologies
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Superconducting Materials and Applications
- Laser-induced spectroscopy and plasma
- Dust and Plasma Wave Phenomena
- Atomic and Subatomic Physics Research
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Solar and Space Plasma Dynamics
- Plasma Applications and Diagnostics
- Electrohydrodynamics and Fluid Dynamics
- Nuclear Physics and Applications
- Earthquake Detection and Analysis
- Nuclear Engineering Thermal-Hydraulics
- Metal and Thin Film Mechanics
- Radiation Detection and Scintillator Technologies
- Anomaly Detection Techniques and Applications
- Temporomandibular Joint Disorders
- Power System Optimization and Stability
- Vacuum and Plasma Arcs
- Neural Networks and Applications
Institute for Plasma Research
2016-2025
Homi Bhabha National Institute
2018-2024
University of Surrey
2023-2024
Seoul National University
2024
Deakin University
2022-2023
Nirma University
2023
Centre of Plasma Physics - Institute for Plasma Research
2019-2021
Pandit Deendayal Petroleum University
2021
Gauhati University
2019
The University of Texas at Austin
1995-2019
There is a paucity of information on the morphological assessment temporomandibular joint in relation to varying skeletal and dental relationships. The purpose this study was evaluate morphologic relationship condyle fossa patients with different malocclusions Pretreatment records 232 orthodontic patients, 95 males 137 females, Caucasian descent ranging age from 9 years 4 months 42 6 months, were examined. Records included casts, lateral cephalometric radiographs, hand-wrist corrected...
Disruptions are events in which large fractions of the plasma thermal energy lost due to uncontrolled growth some large-scale instability. Major disruptions lead sudden termination current a very short timescale. A data-driven methodology employing time series analysis using relevant parameters for prediction disruption event before sufficient alarming is useful absence first-principle physics methods. ADITYA ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Experiments on ADITYA-U tokamak show a marked enhancement in the sawtooth period by application of short gas puffs fuel that cause modification radial density profile. A consequent suppression trapped electron modes (TEMs) then leads to an increase core temperature. This slows down heat propagation following crash, causing delay achieving critical temperature gradient inside q = 1 surface required for next crash happen. The overall scenario has strong similarities with behavior under...
This article reports the development of a versatile high-speed reciprocating drive system (HRDS) with interchangeable probe heads to characterize edge plasma region ADITYA-U tokamak. consisting Langmuir and magnetic heads, is designed, fabricated, installed, operated for studying extent fuel/impurity gas propagation its influence on dynamics in far-edge inside last closed flux surface (LCFS). The HRDS driven by highly accurate, easy-to-control, dynamic, brushless, permanently excited...
Impact of pre-sowing treatment maize (Zea mays Var: GS-2) seeds with non-thermal glow discharge plasma on the growth and yield field grown plants has been investigated. Maize were treated produced from five different gases Nitrogen (N2), Helium (He), Argon (Ar), Hydrogen (H2) Oxygen (O2) before sowing in field. Seeds exposed to 30 W for 240 seconds a cylindrical stainless steel vacuum chamber utilizing an automatic matching network 13.56 MHz capacity up 600W RF power source are used. Plasma...
The 2-D edge plasma fluid transport code, UEDGE has been used to simulate the region of circular limiter plasmas ADITYA-U for modelling measured electron density profile. geometry introduced in which is primarily developed and divertor configuration. computational mesh defining generated by a routine in-house, successfully integrated with code parameters ADITYA-U. radial profiles scrape-off layer (SOL) density, ne temperature are obtained from simulations model profile using Langmuir probe...
Several experiments, related to controlled thermonuclear fusion research and highly relevant for large size tokamaks, including ITER, have been carried out in ADITYA, an ohmically heated circular limiter tokamak. Repeatable plasma discharges of a maximum current ~160 kA discharge duration beyond ~250 ms with flattop ~140 obtained the first time ADITYA. The reproducibility has improved considerably lithium wall conditioning, are by precisely controlling position plasma. In these discharges,...
The first Indian tokamak, ADITYA, operated for over two decades with a circular poloidal limiter, has been upgraded to tokamak named ADITYA Upgrade (ADITYA-U) attain shaped-plasma operations an open divertor in single and double-null configurations. Experimental research using ADITYA-U made significant progress since the last FEC 2016. After installation of plasma facing component standard diagnostics ADITYA-U, Phase-I were initiated December 2016 graphite toroidal belt limiter. Ohmically...
The Maryland Centrifugal Experiment MCX [R. F. Ellis, A. B. Hassam, and S. Messer, Phys. Plasmas 8, 2057 (2000)] studies supersonic rotation enhanced confinement produced by the application of an electric field perpendicular to axial confining mirror magnetic field; radial shear in is predicted stabilize magnetohydrodynamic (MHD) interchange modes. 2.6 m length, maximum 1.9 T, midplane 0.33 T; inner coaxial core driven a 10 KV capacitor bank, producing which drives azimuthal rotation....
In the Helicon eXperimental (HeX) device, geometric aperture is fixed, but position of magnetic can be varied. Working with Argon gas in pressure range 1 − 10 × 4 mbar, an annular plasma (density ∼ 16 m 3) formed downstream, always front aperture. This occurs irrespective relative or presence a radial electric field. contrary to earlier proposition made by others that field necessary produce hollow profile. Instead, ionization neutrals radially outer region tail electrons, rotating fast due...
The study group consisted of 19 subjects with positive overjet and overbite, 17 skeletal open bite. Two bipolar surface electrodes were attached to the skin upper lower lips. mean integrated amplitude electromyographic (EMG) activity was obtained at mandibular rest position lips in contact apart. Subjects divided into two groups based on or negative values difference EMG mentalis muscle between lip positions. displaying a value classified as having competent those incompetent found be more...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Manjit Kaur, Sayak Bose, P. K. Chattopadhyay, D. Sharma, J. Ghosh, Y. C. Saxena, Edward Thomas; Generation of multiple toroidal dust vortices by a non-monotonic density gradient in direct current glow discharge plasma. Phys. Plasmas 1 September 2015; 22 (9): 093702. https://doi.org/10.1063/1.4929916 Download...
Disruptions, induced in Aditya tokamak by hydrogen gas puffing, are successfully mitigated through stabilization of magnetohydrodynamic (MHD) modes applying a bias voltage to an electrode placed inside the last-closed flux surface prior injection. Above threshold sheared Er × Bφ rotation plasma generated edge biasing leads substantial reduction growth MHD (m/n = 3/1, 2/1), which causes avoidance disruptions prevention mode overlapping and subsequent ergodization magnetic field lines.
Observation of dust cloud rotation in parallel-plate DC glow discharge plasma is reported here. The experiments are carried out at high pressures (∼130 Pa) with a metallic ring placed on the lower electrode (cathode). rotates poloidally vertical plane near cathode surface. This structure continuous toroidally. Absence magnetic field rules possibility E × B induced ion flow as cause rotation. rotational structures exist even water cooled cathode. Therefore, temperature gradient driven...
Abstract Since the 2018 IAEA-FEC conference, in addition to expanding parameter horizons of ADITYA-U machine, emphasis has been given dedicated experiments on inductively driven particle injection (IPI) for disruption studies, runaway electron (RE) dynamics and mitigation, plasma rotation reversal, radiative-improved modes using Ne Ar injection, modulation magneto–hydrodynamic modes, edge turbulence periodic gas puffs electrode biasing (E-B). Plasma parameters close design circular plasmas...
Intense visible lines from Be-like oxygen impurity are routinely observed in the Aditya tokamak. The spatial profile of brightness a spectral line (2p3p 3D3–2p3d 3F4) at 650.024 nm is used to investigate transport typical discharges A 1.0 m multi-track spectrometer (Czerny–Turner) capable simultaneous measurements eight sight obtain radial O4+ emission. emissivity emission obtained using an Abel-like matrix inversion. coefficients determined by reproducing experimentally measured profiles...
Single density peak has been commonly observed in low magnetic field (&lt;100 G) helicon discharges. In this paper, we report the observations of multiple peaks discharges produced linear plasma device [Barada et al., Rev. Sci. Instrum. 83, 063501 (2012)]. Experiments are carried out using argon gas with m = +1 right helical antenna operating at 13.56 MHz by varying from 0 G to 100 G. The varies constant input power and pressure reaches its value a ∼25 Another smaller magnitude near 50...
In diagnosing the Maryland Centrifugal Experiment (MCX) [R. F. Ellis et al., Phys. of Plasmas 8, 2057 (2001)], earlier spectroscopic measurements averaged plasma rotation velocities have been upgraded to include radial distributions, using a five-channel fiber-optic collection system. Detailed information from each view is now possible with an 8-times increase in spectral resolution, by 2m spectrograph and 2400lines∕mm grating. Inversion integrated chordal radiation into dependence local...
Localized electron temperature and density peaking at different axial locations in the downstream helicon plasma have been observed a linear device with both geometrical magnetic expansion. The discharge is produced an right helical antenna powered by RF source operating 13.56 MHz. Axial wave field measurement shows presence of damped waves standing character folded into it even low densities ( m). measured wavelength just about twice length phase velocity almost speed required for impact...