A5056629141- Magnetic confinement fusion research
- Radio Frequency Integrated Circuit Design
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Gyrotron and Vacuum Electronics Research
- Electromagnetic Compatibility and Noise Suppression
- Advanced Power Amplifier Design
- Microwave Engineering and Waveguides
- Superconducting Materials and Applications
- Advanced Biosensing Techniques and Applications
- Energy Harvesting in Wireless Networks
- Nuclear Engineering Thermal-Hydraulics
- Advanced MEMS and NEMS Technologies
- Digital Accessibility for Disabilities
- Semiconductor Lasers and Optical Devices
- Advancements in PLL and VCO Technologies
- GaN-based semiconductor devices and materials
- Advanced Antenna and Metasurface Technologies
- Nuclear Materials and Properties
- Migration, Ethnicity, and Economy
- Assistive Technology in Communication and Mobility
- Disability Education and Employment
- Non-Invasive Vital Sign Monitoring
- Nuclear reactor physics and engineering
- Photonic and Optical Devices
CT Group Of Institutions
2025
Institute for Plasma Research
2013-2024
Indraprastha Institute of Information Technology Delhi
2024
Raja Ramanna Centre for Advanced Technology
2009-2012
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...
Abstract A first-of-its-kind, inductively driven micro-particle (Pellet) accelerator and injector have been developed operated successfully in ADITYA-U circular plasma operations, which may ably address the critical need for a suitable disruption control mechanism ITER future tokamak. The device combines principles of electromagnetic induction, pulse power technology, impact, fracture dynamics. It is designed to operate variety environments, including atmospheric pressure ultra-high vacuum....
Radio frequency (RF) and microwave amplifier research has been largely focused on solid-state technology in recent years. This paper presents design performance characterization of a 50-kW modular amplifier, operating at 505.8 MHz. It includes architecture selection procedures based circuit EM simulations for its building blocks like modules, combiners, dividers, directional couplers. Key objectives such as efficiency, return loss, amplitude/phase imbalance are discussed this real-time...
A 140 GHz phase-locked heterodyne interferometer system has been designed, developed and installed at Aditya Tokamak for real time density measurement. The uses a novel approach of zero-cross detection using in-phase quadrature (IQ) signals with single balanced mixer. transmitter receiver systems are phase locked by 100 MHz crystal oscillator the output mixed in mixer which produces highly stabilized intermediate frequency (IF) 2.0 GHz. This signal is further amplified low noise amplifier...
This paper examines some important relationships, related with the system efficiency, for very high power, radio frequency solid-state transmitter; incorporating multiple power amplifier modules, combiners, dividers, couplers, and control/interlock hardware. In particular, characterization of such transmitters, at component as well level, is discussed. The analysis studying influence amplitude phase imbalance, on useful performance parameters like efficiency distribution performed. based a...
Abstract The ADITYA upgrade (ADITYA-U), a medium-sized <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mo>(</mml:mo> <mml:msub> <mml:mi>R</mml:mi> <mml:mn>0</mml:mn> </mml:msub> </mml:mrow> <mml:mo>=</mml:mo> <mml:mn>75</mml:mn> <mml:mtext> cm</mml:mtext> <mml:mo>,</mml:mo> <mml:mstyle scriptlevel="0"/> <mml:mi>a</mml:mi> <mml:mn>25</mml:mn> <mml:mo>)</mml:mo> </mml:math> conventional tokamak facility in India, has been consistently producing...
For a two-way planar power divider, performance improvement, achieved by using cylindrical dielectric resonator (DR), is discussed. This DR magnetically coupled with the microstrip transmission lines of this divider. Instead resonator, it provide loading to T junction Using full wave electromagnetic analysis divider's structure, shown that incorporation such results in operation divider at multiple frequencies input return loss better than 20 dB. By changing coupling and constant division...
Radio frequency and Microwave (RFM) infrastructure test facility is under development at RRCAT for evaluating powering, subsystems of particle accelerator. As a part this facility, design 20-30 kW UHF Solid State Power Amplifiers in progress. For work, procedure has been formulated the solid state amplifier modules, radial combiner, divider directional coupler; with specifications suited to RFM power system Methodology demonstrated by developing two different amplifiers output 2 each,...
SST-1 Tokamak has recently completed the 1st phase of up-gradation with successful installation and integration all its First Wall components. The comprises ∼ 3800 high heat flux compatible graphite tiles being assembled installed on 132 CuCrZr sink back plates engraved 4 km leak tight baking cooling channels in five major sub groups equipped 400 sensors weighing 6000 kg total thirteen isolated galvanic six hydraulic circuits. phase-1 spectrum also includes addition Supersonic Molecular Beam...