A5020912266- Particle accelerators and beam dynamics
- Magnetic confinement fusion research
- Superconducting Materials and Applications
- Fusion materials and technologies
- Gyrotron and Vacuum Electronics Research
- Laser-Plasma Interactions and Diagnostics
- Advanced DC-DC Converters
- Ionosphere and magnetosphere dynamics
- Advanced Power Amplifier Design
- Microgrid Control and Optimization
- Advanced Battery Technologies Research
- Wireless Power Transfer Systems
- Cyclone Separators and Fluid Dynamics
- Particle Accelerators and Free-Electron Lasers
ITER
2011-2014
Institute for Plasma Research
2001-2011
Introduction. Hybrid renewable energy systems, which integrate wind turbines, solar PV panels, and battery storage, are essential for sustainable solutions. However, managing the flow in these especially under varying load demands climatic conditions, remains a challenge. The novelty of this paper is introduces hybrid system structure using Dual Active Bridge (DAB) DC-DC converters an management strategy (EMS) to control power more effectively. approach includes dump mechanism handle excess...
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...
Pulsed and continuous high power microwave tubes need to be protected against arc faults within the tube. If energy dumped in such fault is more than critical crater of tube, irreparable damage can occur. Modern switch mode powers supplies (SMPS) that are generally opted for new systems store little capable switching HV few microseconds. So they do not separate protection. However, when conventional feed a reliable crowbar protection system, tested separately limit energy, must used assure...
Second harmonic heating experiments using fast waves are carried out on the Aditya tokamak in ion cyclotron resonance frequency (ICRF) range with help of a 200 kW, 20–40 MHz RF system, which is developed indigenously. Significant direct electron observed hydrogen plasma. The rise temperature prompt application power and increment increases linearly power. A corresponding increase plasma beta hence an stored diamagnetic energy also presence low-Z impurity radiation density do not...
The lower hybrid current drive (LHCD) system is an important in superconducting steady state tokamak (SST-1). It used to and maintain the plasma for 1000 s with a duty cycle of 17%. LHCD being designed launch 1 MW radio frequency (rf) power at 3.7 GHz. rf source comprised two high klystron amplifiers, each capable delivering 500 kW power. In this article, results obtained during installation commissioning these klystrons are presented. Two (model TH2103D) have been successfully installed...
The main functions of the ITER Vacuum Vessel (VV) are to provide necessary vacuum for plasma operation, act as first nuclear confinement barrier and remove heating. design VV has been reviewed in past two years due more advanced analyses, modifications required by interfacing components R&D. Following signature four Procurement Arrangement (PAs), manufacturing sectors, ports In-Wall Shielding (IWS) is being finalized fabrication sectors started 2012.
Plasma is a variable load. The plasma impedance varies over wide range. This requires matching with RF generator that normally of 50 Ohm. network consists stub tuner and phase shifter. Conventional shifter has moving arrangement for variation. At high power not suitable because current. Finger contacts are used to make electrical between different conductors. Because the ovality present into copper tubes, pressure contact does remain same throughout connecting periphery gives uneven...
Initial testing and commissioning of two high power klystrons (TH2103D) gyrotron (VGA8000A19) have been carried out at our Institute. Each the is capable delivering 500 kW 3.7 GHz, to be used for non-inductive lower hybrid current drive (LHCD) in Steady State Superconducting Tokamak (SST-1). The 200 KW 28 breakdown electron cyclotron resonant heating (ECRH) experiments on Aditya tokamak. potential appearing anode point with respect cathode will turn-ON, turn-OFF control beam current. Thus...
SS 316 L(N)-IG (ITER grade) has been selected as the main structural material for ITER vacuum vessel (VV), considering its high mechanical strength at operating temperatures, water chemistry properties, excellent fabrication characteristics, and low cost relative to other candidates. The VV is a class-2 box structure defined in RCC-MR, 2007 edition, which was code design construction. This paper describes materials, applied regulatory requirements, baseline procedures, assembly on site.
AbstractAn electron cyclotron resonance heating system is commissioned on Aditya tokamak to carry out pre-ionization, start-up, and experiments. A high-power microwave source (gyrotron), capable of delivering 200-kW cw power at 28 ± 0.1 GHz, successfully using a water dummy load for pulsed operation. The output mode the gyrotron TE02. measured probe couplers, spectrum analyzer, calorimetric techniques. hardwired interlock operates rail-gap-based crowbar in less than 10 μs under fault...
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 K. Mishra, S. Kulkarni, D. Rathi, A. Varia, H. Jadav, Parmar, B. Kadia, R. Joshi, Y. Srinivas, Singh, Kumar, Dani, Gayatri, Yogi, M. Joisa, C. Rao, Jha, Manchanda, J. Ghosh, P. Atrey, Bhatt, Gupta, Chattopadhyaya, Srinivasan, Bora, Kaw, Aditya Team; Direct Electron Heating Observed by Fast Waves in ICRF Range...
Plasma is a variable load. The impedance of the plasma varies over wide range. This requires matching with RF generator. generator normally 50-Ohm. stub tuners and phase shifter. Multi limb shifter one high power transmission line component that will be used for matching. where more than arms are variation in single stroke. gives advantage same length multiple shifts achieved. Keeping moving small section makes movement easier. Four limbs being here. each kept as 500 mm, so overall 2000 mm...
A 28 GHz ECRH system has been successfully commissioned on the tokamak Aditya to carry out breakdown, start up and heating experiments. The microwave source gyrotron VGA8000A19 capable of delivering 200 kW CW is tested with a water dummy load for pulsed operation. output mode (TE/sub 02/) externally converted HE/sub 11/ help converter Matching Optics Unit transmission line. line consists converter, MOU, DC breaks, mitre bend, polarizer unit different sizes corrugated waveguides. total loss...