A5000758077- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Ionosphere and magnetosphere dynamics
- Particle accelerators and beam dynamics
- Solar and Space Plasma Dynamics
- Laser-Plasma Interactions and Diagnostics
- Superconducting Materials and Applications
- Advanced Data Storage Technologies
- Fusion materials and technologies
- Plasma Applications and Diagnostics
- Radiative Heat Transfer Studies
- High-Velocity Impact and Material Behavior
- Advanced Computational Techniques and Applications
- Service-Oriented Architecture and Web Services
- Dust and Plasma Wave Phenomena
- Sensor Technology and Measurement Systems
- Energetic Materials and Combustion
- Distributed systems and fault tolerance
- Electron and X-Ray Spectroscopy Techniques
- Geomagnetism and Paleomagnetism Studies
- Advanced Surface Polishing Techniques
- Laser-induced spectroscopy and plasma
- Metal Forming Simulation Techniques
- Real-Time Systems Scheduling
- Nuclear reactor physics and engineering
Institute for Plasma Research
2015-2024
Homi Bhabha National Institute
2017-2024
CEA Cadarache
2017
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2017
RF systems in the ion cyclotron resonance frequency (ICRF) range and electron (ECRF) are an advanced stage of commissioning, to carry out pre-ionization, breakdown, heating current drive experiments on steady-state superconducting tokamak SST-1. Initially 1.5 MW continuous wave ICRF system would be used heat SST-1 plasma 1.0 keV during a pulse length 1000 s. For different scenarios at 3.0 T, wide band operating frequencies (20–92 MHz) is required. To meet this requirement two CW rf...
A multi-scale model has been developed to generate and validate spallation (dynamic fracture) parameters for metallic single crystals. The uses Molecular Dynamic (MD) simulations at the atomic scales obtain a dynamic fracture called Nucleation Growth (NAG) model. obtained from MD are then used describe nucleation growth of voids in macroscopic hydrodynamic material impact spallation. spall strength thickness have earlier computed compared with experimental results crystal copper (Cu),...
Electron Cyclotron Resonance Heating (ECRH) system will play an important role in plasma formation, heating and current drive the Superconducting Steady state Tokamak (SST-1). Commissioning activity of machine has been initiated. Many sub-systems have prepared for first discharge. A radial a top port allotted low field side (LFS) high (HFS) launch O X- modes plasma.
Radially inward turbulent particle flux is observed in the core region of target plasma Large Volume Plasma Device where electron temperature gradient (ETG) driven turbulence conditions are satisfied with threshold, ηETG=Ln/LT>2/3 [Mattoo et al., Phys. Rev. Lett. 108, 255007 (2012)]. The mode satisfies scale length and frequency ordering ETG (k⊥ρe≤1≪k⊥ρi,Ωi<ω≪Ωe), k⊥ perpendicular wave vector, ρe ,ρi Larmor radii ion, respectively, Ωi,Ωe, ω gyro frequencies, frequency,...
An automated electro-mechanical system for the positioning of plasma diagnostics has been designed and implemented in a Large Volume Plasma Device (LVPD). The consists 12 assemblies, which are orchestrated using Modbus communication protocol on 4-wire RS485 communications to meet experimental requirements. Each assembly lead screw-based mechanical structure, Wilson feed-through-based vacuum interface, bipolar stepper motor, micro-controller-based drive, optical encoder online correction...
The data acquisition and control system (DACS) implementation for laboratory plasma experiments is a challenging task, develops gradually over time due to the: (a) rapidly evolving requirements driven by the new findings, (b) application of ideas experiments, (c) interaction software with specialized hardware (d) scales measurement controls. This motivates development based on flexible modular architecture scientific computing. We have broadly classified it as: base design dealing testing...
The electrostatic particle flux is measured in the presence of obliquely propagating quasi-longitudinal (QL) whistler turbulence (ωci<ωLH≈ω<ωce) large-volume plasma device (LVPD). QL observed with frequency band between 40 and 100 kHz, characteristic wave numbers k∥≪k⊥ are excited by reflected energetic electrons via loss cone (localised mirror type magnetic geometry) formation a transverse field [BEEF(x̂)] electron energy filter axial LVPD [Bo(ẑ)]. effect strength on radial...
Abstract We report low-frequency electromagnetic turbulence in large-volume plasma devices a region that receives magnetically screened plasma. The magnetic screen is produced by the activation of large solenoid generates strong field ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:msub> <mml:mi>B</mml:mi> <mml:mtext>EEF</mml:mtext> </mml:mrow> </mml:msub> </mml:math> ) transverse to background axial <mml:mi>z</mml:mi> ). strength variation...
Abstract We present a topical review of the detailed experimental investigations Electron Temperature Gradient (ETG) instability-induced turbulence and associated transport that have been carried out in Large Volume Plasma Device (LVPD) at Institute for Research. These results pertaining to high beta plasma are supported by theoretical modeling their significance with relation earlier ETG discussed. The removal non-thermal electrons control electron temperature gradient, $$\nabla {T}_{e}$$...
Abstract Conventional electrostatic probes are commonly used for measuring the plasma parameters like density, electron temperature, potential and floating respectively in a laboratory to unveil physical processes of relevance magnetosphere fusion plasmas. With such probes, real-time measurement temperature its fluctuating AC component becomes very difficult. These measurements significant as they directly give measure energy flux hence can be utilized estimating turbulence-induced loss any...
The Large Volume Plasma device(LVPD), a cylindrically shaped, linear plasma device of dimension( m L 3 , 2 ) have successfully demonstrated the excitation Electron Temperature Gradient(ETG) turbulence[ Mattoo et al.,[1]].The observed ETG turbulence shows significant power between ( ), corresponding to wavenumber, ~ where, and ion cyclotron frequency electron Larmor radius, respectively.The wave number matches well with theoretical estimates Whistler-ETG mode.We investigated...
Abstract A double plasma device (DPD) is tested for different operational configurations to identify suitable control parameters in a weakly ionized, unmagnetized discharge. separation grid installed between the two chambers of DPD, which allows filtering from first second chamber. Investigations are carried out parameters, especially electron temperature by exploring role grid. The bias varied −25–0 V and 0–30 reflect cooling heating plasma. prominent maximum ratio n source / target ....
Radial control of the electron temperature gradient is demonstrated in a double plasma device by making use segmented grid biasing. The produced source region allowed to diffuse into target through single as well cassette multiple assembly, under different bias conditions. Both heating and cooling are observed radially at one location when used. electrons cooled down 3.3 eV from 5.1 raised −25 0 V. Similarly, during heating, increases 4.8 7.3 varied between +20 Two transparencies grids, 45%...
This paper discusses the salient features and plasma performance of newly installed Large Area Multi-Filamentary Plasma Source (LAMPS) in large volume device-upgrade. The source is designed to exhibit a electron density ∼1018 m-3, low temperature (∼eV), uniform cross section 2.54 m2. directly heated LAMPS emits accelerated primary energetic electrons when it biased with negative discharge voltage respect anode. hairpin shaped tungsten (W) filaments, each diameter 0.5 mm length 180 mm, are...
In an era of digital transformation and collaborations, the Web Information System (WIS) becomes essential requirement for information data sharing large experimental facilities among users. With enhancement in capabilities performance web technologies, using a flexible, modular, secure, robust mechanism is feasible. this direction, Large Volume Plasma Device (LVPD), device dedicated carrying out investigations unfolding physical phenomena relevance to Earth’s magnetosphere fusion plasmas,...