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This paper presents a Maximum Current Point Tracking (MCPT) Controller for SIC MOSFET based high power solid state 2 MHz RF inverter for RF driven H− ion source. This RF Inverter is based on a class-D, half-bridge with series resonance LC topology, operating slightly above the resonance frequency (near to 2 MHz). Since plasma systems have a dynamic behavior which affects the RF antenna impedance,...
This paper presents a SIC MOSFET based high power solid state 2 MHz RF source for RF driven H− ion source. This is based on a class-D, half-bridge with series resonance LC topology, operating slightly above resonance frequency (near to 2 MHz), unlike other high power RF source, it doesn't need impedance matching network in between the source and the load, in order to transfer maximum power to the...
A high power (2 kW, CW) magnetron-based microwave system operating at 2.45 GHz has been designed, tested, characterized, and used to produce plasma. The system consists of a microwave source, an isolator, a directional coupler, a three-stub tuner, a high voltage break, a microwave vacuum window, and a microwave launcher. These microwave components were simulated using microwave studio software. The...
The modeling and simulation of externalantenna is important for the study of RF driven hydrogen plasma sources. The external antenna will be externally wrapped around plasma chamber. RF pulsed power feeding at 2 MHz frequency to antenna for plasma generation (ionisation) and heat up through inductive coupling. This antenna has been modeled and simulated with Opera-3D simulation platform using TOSCA...
The modeling and simulation of externalantenna is important for the study of RF driven hydrogen plasma sources. The external antenna will be externally wrapped around plasma chamber. RF pulsed power feeding at 2 MHz frequency to antenna for plasma generation (ionisation) and heat up through inductive coupling. This antenna has been modeled and simulated with Opera-3D simulation platform using TOSCA...
Electron cyclotron resonance (ECR) plasma was produced at 2.45 GHz using 200–750 W microwave power. The plasma was produced from argon gas at a pressure of 2 × 10 − 4 mbar. Three water-cooled solenoid coils were used to satisfy the ECR resonant conditions inside the plasma chamber. The basic parameters of plasma, such as electron density, electron temperature, floating potential, and plasma potential,...
A prototype pulsed electron beam irradiation facility for radiation processing of food and medical products is being commissioned at our centre in Indore, India. Analysis of surface dose and uniformity for a pulsed beam facility is of crucial importance because it is influenced by various operating parameters such as beam current, pulse repetition rate (PRR), scanning current profile and frequency,...
Monte Carlo calculations have been performed using MCNP code to study the optimization of photo-neutron yield for different electron beam energies impinging on Pb, W and Ta cylindrical targets of varying thickness. It is noticed that photo-neutron yield can be increased for electron beam energies ≥100 MeV for appropriate thickness of the target. It is also noticed that it can be maximized by further...
The x-ray emission from slab targets of copper irradiated by Nd:glass laser (1.054 µm, 5 and 15 ns) at intensities between 1012 and 1011W/cm2 has been studied. The x-ray emissions were monitored with the help of high quantum efficiency x-ray silicon photo diodes and vacuum photo diodes, all covered with aluminium filters of different thickness. The x-ray intensity vs the laser intensity has a scaling...
An investigation of x-ray emission from Cu plasma produced by 1.054 µm Nd:glass laser pulses of 5 ns duration, at 2 × 1012 − 2 × 1013 W cm−2 is reported. The x-ray emission has been studied as a function of target position with respect to the laser beam focus position. It has been observed that x-ray emissions from ns duration plasma show a volume effect similar to subnanosecond plasmas. Due to this...
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