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MOPPH005 |
Microwave Power Scaling to optimize Electron density and Temperature in ECR Produced Deuterium Plasma | |
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Efficiently produced deuterium plasma forms the starting point of all ECR ion sources for the production of high energy neutrons. Effective absorption of microwave power in the deuterium plasma ensures an intense ionization and hence optimum electron density and temperature. Optical emission spectroscopy is one of the diagnostic techniques used to measure parameters of produced ECR plasmas. In this paper, the effect of microwave power on electron temperature in deuterium plasma is investigated. The plasma was generated by 2.45 GHz ECR microwave source. The microwave power was varied from 100-400 Watt keeping the deuterium gas pressure in the range of ~ 5×10-4 mbar. The flow rate of gas was ~ 5×10-4sccm. Plasma was diagnosed by optical emission spectroscopic technique. Optical emission spectrum of the deuterium plasma was recorded in the wavelength region 350-900 nm. In the recorded spectrum, α, β, and γ Balmer atomic lines of deuterium were identified along with few neutral lines of chromium. The electron temperature of the deuterium plasma was measured by using Boltzmann plot. A detail analysis of recorded deuterium spectrum will be presented.
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