Gas fueling studies in the PDX tokamak: II Page: 2 of 20
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Gas Fueling Studies in the PDX Ibkamak: II
H. F. Dylla, M. G. Bell, H. J, FoneX, K. Jaehnig, S. M. Kaye,
D. k. Owens, D, B. Heifetz, and G. L. Schmidt
Princeton Plasma Physics Laboratory, Princeton, N.J. 08544
Measurements of the gas fueling characteristics of the PDX tokamak have
been extended in parameter range. An earlier study presented the gas fueling
efficiency for H2 and D2 for the standard PDX divertor configurations with a
large conductance between the divertor and main plasma chambers. This study
presents the observed variations in H2, D2, and He neutral pressure and
ionization light emission for divertor configurations with a restricted
conductance between the divertor and main plasma chambers. The restricted
conductance improved the divertor/main-chamber compression ratio by more than
an order of magnitude. For the same plasma density, gas fueling from the
divertor chamber was twice as efficient as fueling from the main chamber. At
the highest plasma densities that were investigated, ne = 4 x 1013 cm-^, a
decrease in the plasma temperature in the divertor was indicated by a decrease
in the ionization light at the divertor throat for D2 and He fueled
discharges. These observations are consistent with a Monte-Carlo model of
neutral gas transport in the divertor.
Symposium on Energy Removal and
Particle Control in Toroidal Fusion Devices
Princeton, New Jersey USA
26-29 July 1983
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Dylla, H.F.; Bell, M.G.; Fonck, R.J.; Jaehnig, K.; Kaye, S.M.; Owens, D.K. et al. Gas fueling studies in the PDX tokamak: II, article, January 1, 1984; New Jersey. (digital.library.unt.edu/ark:/67531/metadc1068439/m1/2/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.