He++ Transport in the PDX Tokamak

Phys. Rev. Lett. 52, 530 – Published 13 February 1984
R. J. Fonck and R. A. Hulse


A powerful new approach to the study of particle transport and helium ash confinement in high-temperature fusion plasmas is demonstrated by charge-exchange recombination spectroscopy of He++ in Ohmically heated PDX discharges. Time- and space-resolved measurements of He++ density following a short puff of helium gas into the plasma edge are fitted with use of a diffusive/convective transport model with coefficients D=(2.1±0.9)×104 cm2 s-1 and v(r)D=(0.8±0.3)(lnne)r.

DOI: http://dx.doi.org/10.1103/PhysRevLett.52.530

  • Received 9 November 1983
  • Published in the issue dated 13 February 1984

© 1984 The American Physical Society

Authors & Affiliations

R. J. Fonck and R. A. Hulse

  • Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544

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