Discharge cleaning and plasma purity in ISX-B [electronic resource].
- Oak Ridge, Tenn. : Oak Ridge National Laboratory, 1984.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: 14 : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory
United States. Department of Energy. Office of Scientific and Technical Information
- Two simply measured parameters are shown to be useful in characterizing the vacuum vessel and plasma cleanliness and in predicting plasma performance in the ISX-B tokamak. It is demonstrated that the parameter P/sub rad//anti n/sub e/, measured at the start of each tokamak discharge, is related to both the available operating space (I/sub p/, anti n/sub e/) with Ohmic heating and the energy confinement times achieved with neutral beam injection. An assessment of P/sub rad//anti n/sub e/ on both a shot-to-shot and a day-to-day basis then determines the changing cleanliness of the plasma. It is further shown that P/sub rad//anti n/sub e/ can be predicted by the results of a residual gas analysis performed after discharge cleaning; specifically, it is directly proportional to the fractional concentration of water vapor.
- Published through SciTech Connect.
6. international conference on plasma surface interactions in controlled fusion devices, Nagoya, Japan, 14 May 1984.
Mioduszewski, P.K.; Wootton, A.J.
- Funding Information:
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