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Equipment & Infrastructural facilities
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A 1 MW power supply (2 units of 500 kW each) and supporting system for mounting and testing of plasma torches
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250 kW transferred arc type plasma torch.
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A plasma melter simulator stand for calorimetric experiments with thermocouple based multi-channel data acquisition systems
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A 100 kW hollow copper electrode plasma torch operating with air as plasma gas for plasma processing
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High Power Plasma Melter
| A 450 kW, 2-torch plasma melter for reactive
scrap is being developed. Refractory metal is melted by a high
current arc plasma. The melt flows into a water-cooled copper
cylinder to form an ingot. Photo shows melting of scrap metal
using this torch |
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Numerical Simulation of Arc Plasma Jets
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A modified two-dimensional FIXGRID elliptic code for a plasma jet emerging from the nozzle of a non transferred arc rod electrode plasma torch has been developed to simulate the temperature, velocity, density and enthalpy fields with substrate impingement. The figure shows a plot of the temperature distribution in the torch under typical operating conditions |
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Plasma simulation
| A simple, accurate and sensitive digital beam profile monitor for IR lasers which enables quick measurement of beam parameters has been developed.. The device is sensitive down to a few
mJ/cm2.The figure at left shows a typical profile obtained with this instrument and plotted using the software developed in the division. |
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Particle Trajectory and Temperature History in Plasma Jets
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Particle trajectory and temperature history of alumina particles in
the size range 20-40 microns have been modeled numerically. It is
seen that at lower input power (10 kW and below), only the finer
particles (20 micron and below) melt, while at higher input power
coarser particles start melting. At high power, the temperature of
smaller particles is higher leading to in-flight dissociation of a
substantial fraction of the finer alumina particles. The figure is a
plot of distance vs. temperature using this code.
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A diagnostics stand for the measurement of plasma and particle parameters has been set up to test various spectroscopic diagnostic techniques. Photo on the left shows the stand being used in testing a plasma torchl Plasmas |
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Transferred Arc Plasma Devices for ADS Thermohydraulic Simulator
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A transferred arc plasma torch based ADS thermohydraulic simulator has been designed, fabricated and tested. The plasma torch and the window assembly have been qualified with water as the heat transfer agent (target) instead of the liquid metal. To achieve uniformity in heat flux delivered to the target, a rotating magnetic field was used to spread the plasma beam over the entire window surface.
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A plasma run at about 60 kW with rotating magnetic field delivered a peak power density of 1.6 kW/cm2 with a half width of 80mm at a standoff of 150 mm.
Transferred Arc Pl`sma Torch for Chemical Processing Applications
A 7 ring constricted arc plasma torch has been designed, fabricated and tested up to 50 kW rating. This torch would be coupled to plasma chemical reactor for nuclear fuel cycle. A pilot flame is initially struck between the cathode and the first ring. The main arc is then struck between the cathode and the anode (seventh ring). Facility for secondary injection of reactants is provided at the fifth ring.
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