H-MODE STUDIES IN PDX.

R. J. Fonck, P. Beirsdorfer, M. Bell, K. Bol, D. Boyd, D. Buchenauer, R. Budny, A. Cavallo, P. Couture, T. Crowley, D. Darrow, S. Davis, H. F. Dylla, H. Eubank, Robert James Goldston

Research output: Contribution to conferencePaper

5 Scopus citations

Abstract

A regime of enhanced energy confinement during neutral beam heating has been routinely obtained in the PDX tokamak after modifications to form a closed divertor geometry. Plasma density profiles were broad and the electron temperature at the plasma edge reached values of about 400 eV in the H-mode phase of a discharge. A comparison of closed divertor discharges with moderate and intense gas puffing indicates that a requirement for obtaining high confinement times is the localization of the plasma fueling source in the divertor throat region. Initial results with a particle scoop limiter indicate high particle confinement times and energy confinement times approaching those of diverted H-mode plasmas.

Original languageEnglish (US)
Pages37-55
Number of pages19
StatePublished - Dec 1 1984

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Fonck, R. J., Beirsdorfer, P., Bell, M., Bol, K., Boyd, D., Buchenauer, D., Budny, R., Cavallo, A., Couture, P., Crowley, T., Darrow, D., Davis, S., Dylla, H. F., Eubank, H., & Goldston, R. J. (1984). H-MODE STUDIES IN PDX.. 37-55.