A5088711799- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Particle Accelerators and Free-Electron Lasers
- Plasma Diagnostics and Applications
- Muon and positron interactions and applications
- Superconducting Materials and Applications
- Fusion materials and technologies
- Neutrino Physics Research
- Particle Detector Development and Performance
- Ionosphere and magnetosphere dynamics
- Nuclear Physics and Applications
- Earthquake Detection and Analysis
- Radiation Detection and Scintillator Technologies
- Electrostatic Discharge in Electronics
- Dust and Plasma Wave Phenomena
- Pulsed Power Technology Applications
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Electrohydrodynamics and Fluid Dynamics
- Radiation Therapy and Dosimetry
- Metal Forming Simulation Techniques
- Ion-surface interactions and analysis
- Laser-induced spectroscopy and plasma
- Welding Techniques and Residual Stresses
- Advanced Welding Techniques Analysis
Institute for Plasma Research
2002-2024
Homi Bhabha National Institute
2023-2024
Fermi National Accelerator Laboratory
2012-2014
Highly charged dust grains immersed in a plasma can exhibit charge fluctuations response to oscillations the currents flowing into them. This introduces new physical effect, namely, electric on particles becomes time dependent and self-consistent dynamical variable. The consequent modifications collective properties of dusty are investigated. It is shown that these effects lead dissipative instability mechanisms for ion waves interesting applications many laboratory astrophysical situations.
A major technological challenge in building a muon cooling channel is operating rf cavities multitesla external magnetic fields. We report the first proof-of-principle experiment of high pressure gas-filled cavity for use with intense ionizing beams and strong power consumption by beam-induced plasma investigated hydrogen deuterium gases pressures between 20 100 atm peak gradients 5 $50\text{ }\text{ }\mathrm{MV}/\mathrm{m}$. The low case agrees well an analytical model based on electron ion...
We investigate the effect of self-consistent dust charge fluctuations on collective modes in an inhomogeneous magnetized dusty plasma. A fluid model is developed where dynamics and are taken into account. It shown that for Rayleigh-Taylor mode both lead to a rapid increase stable regime. also can drive drift wave unstable under certain conditions relevant some astrophysical situations.
A muon collider or Higgs factory requires significant reduction of the six dimensional emittance beam prior to acceleration. One method accomplish this involves building a cooling channel using high pressure gas filled radio frequency cavities. The performance such cavity when subjected an intense particle must be investigated before technology can validated. To end, (rf) test cell was built and placed in 400 MeV line from Fermilab linac study plasma evolution its effect on cavity. Hydrogen,...
Conceptual design of a fully solid state power supply system for 1000s ON/ 5000s OFF long pulse operation neutral beam injector is presented. A switched with crowbar used regulated HV power. 400 Hz, 24 phase filament in an integrated closed loop control the buck type arc supplies. Temperature each controllable independent other. An air core transformer secondary RC load passive snubber grid circuit. supervises interlock, protection and safety system.
Neutral beam injection (NBI) system is a workhorse to heat magnetically confined tokamak fusion plasma. The heart of any NBI an ion extractor system. Steady State Superconducting Tokamak-1 (SST-1) needs 0.5 MW hydrogen power at 30 kV raise the plasma temperature ~1 keV and 1.7 55 for future upgradation. To meet this requirement, consisting three actively cooled grids has been designed, fabricated, its performance test done MARION stand, IPP, Julich, Germany. During long pulse (14 s)...
The MuCool Test Area (MTA) at Fermilab is a facility to develop the technology required for ionization cooling future Muon Collider and/or Neutrino Factory. As part of this research program, feasibility studies various types RF cavities in high magnetic field environment are progress. unique approach, we have tested cavity filled with pressure hydrogen gas 400 MeV proton beam an external (B = 3 T). Quantitative information about number protons passing through essential requirement test. MTA...
The neutral beam injector of steady state superconducting tokamak (SST1-NBI) at IPR is designed for injecting upto 1.7 MW (Hº, 30–55 keV) power to the plasma heating and current drive. Operations positive ion source (PINI or Plug-In-Neutral-Injector) SST1-NBI were carried out on NBI test stand. PINI was operated reduced gas feed rate 2–3 Torr l/s, without using high speed cryo pumps. Experiments conducted achieve a stable extraction by optimizing operational parameters namely, arc (120–300...
This article outlines the development and examination of properties an asymmetrical dissimilar metal joint produced using friction welding (FW). Friction involving materials, specifically a 50 mm (length) × 45 (width) 20-mm (thickness) electrolytic tough pitch copper (ETP-Cu) plate 12.5-mm-diameter SS304L rod, was carried out. The assessment asymmetrically welded components encompassed ultrasonic testing, high-pressure helium gas leak tensile scanning electron microscopy, optical...
The back plate is an important component of the ion source because its multiple roles including heat load removal during beam operation. main components are (1) a Type 304L stainless steel (SS304L) magnet positioning that holds samarium cobalt permanent magnets required for confinement plasma, (2) oxygen-free electronic copper cooling with 35 inner and 8 outer channel grooves (each which 4 × 1.8 mm2) vacuum brazed SS304L plate, (3) cover plate. In this paper, successfully fabricated, high...
A neutral beam injector is built at IPR to heat the plasma of SST-1 and its upgrade. It delivers a maximum power 1.7 MW for 55 kV Hydrogen or 80 Deuterium beam. At lower voltage, delivered falls 500 kW 30 which adequate ions ~ 1 keV. Process acceleration required conversion neutrals removal un-neutralized diagnostic systems occupy large space. The consequence that linear extent least few meters. Also, port access provides very narrow duct. Even good design fabrication practices keep...
The effects of finite space charge on the equilibrium characteristics charges confined in a Paul trap are investigated. It is found that introduces two have opposing influences confining pseudopotential well. effect electrostatic repulsion between like to make potential well shallower, but plasma collective response can lead deepening Illustrative numerical solutions thermal equilibria as an approximate analytical discussed.
Current muon collider schemes call for significant six dimensional (6D) cooling of the beam before it is accelerated [1]. One scheme, Helical Cooling Channel (HCC), employs RF cavities filled with high pressure hydrogen gas [2]. The acts both as an energy loss mechanism to allow ionization [3, 4], and a buffer in order prevent breakdown [5]. When particles passes through HPRF cavity, will ionize gas. amount plasma generated dependent on energy, stopping power gas, density resulting gain from...