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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 278-280A Compact Plasma System for Experimental Study

A Compact Plasma System for Experimental Study

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Abstract:

A compact plasma system is set up at Ravenshaw University, India. The plasma system consists of a curved vacuum chamber which is nothing but a part of a toroid (θ=700) having minor radius, r= 0.3 m and major radius, R= 0.5 m, vacuum system, electromagnet, gas injected washer stacked plasma gun to produce plasma blobs/filaments, pulse forming network to energise plasma gun, diagnostic tools like electric probes, magnetic probes, spectrometer, high speed CCD camera, digital pulse/delay generator to synchronise the diagnostic tools. A pair of copper coil is wound over the chamber and capacitive pulse is fed to the coil to produce non-uniform magnetic field inside the chamber. The gas injected washer stacked plasma gun is a mono-anode - multi cathode system having five cathodes made up of brass and an anode made up of copper. The gun impedance is ~ 15 Ω. The pulse forming network (PFN) is Guillemin E type which consists of capacitors having equal capacitance 5.5 μF and inductors having equal inductances 1.5 μH. The pulse width of the PFN is ~ 7.6 μs for a seven stage network, as tested with known resistive circuit. Magnetic probes are designed and calibrated using a Helmholtz coil to map the radial magnetic field profile of the plasma chamber. Electric probes like Langmuir triple probe, velocity probes are designed to measure plasma parameters like blob velocity, density, temperature etc. Emission spectroscopy method is used to identify charged species inside the plasma. High speed CCD camera is used to interpret the structure of the plasma. A digital pulse/trigger generator is used to synchronise the CCD, spectrometer and switching thyristor etc. Preliminary results are also reported.

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Periodical:

Applied Mechanics and Materials (Volumes 278-280)

Pages:

90-100

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.278-280.90

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Online since:

January 2013

Authors:

Gourishankar Sahoo, Rita Paikaray, Subrata Samantaray, Dheeren Chandra Patra, Narayan Chandra Sasini, Joydeep Ghosh, Malay Bikash Chowdhuri, Amulya Sanyasi

Keywords:

Electric Probe, Fast Imaging, Gas Injected Washer Stacked Plasma Gun, Guillemin E Type, Magnetic Probe, Pulse Forming Network (PFN)

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