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Home / Publications / Journals / Fusion Science and Technology / Volume 51 / Number 2T / Pages 385-387

Numerical Study of Charge Separation of Cusp DEC Installed at GAMMA 10

R. Kawana, S. Okayama, M. Ishikawa, Y. Nakashima, Y. Yasaka, H. Takeno, Y. Tomita (19P64)

Fusion Science and Technology / Volume 51 / Number 2T / February 2007 / Pages 385-387

Technical Paper / Open Magnetic Systems for Plasma Confinement

The objective of the present study is to analyze separation capability of charged particles of small-scale cusp type direct energy experimental converter installed at GAMMA 10 by means of numerical simulation with the axisymmetrical two-dimensional approximation. The numerical simulation has given the following results: (1) when the input power of protons is less than or equal to 1W, the protons and the electrons can be separated with the proton collection efficiency of 100%. When the input power of protons is 5W, the protons and the electrons become difficult to be separated with the proton collection efficiency of about 5%. (2) The electrons whose radius of incidence is small become trapped in the separation zone. These results depend on the magnitude of self-induced electric field which is formed by separation of the protons and the electrons.

 
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