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A pellet injector of the pneumatic type has been installed on the TEXTOR tokamak. Pellets of size 1.4 mm in both length and diameter, with velocity in the range 400 to 900 m/s, have been injected into ohmic D(2) discharges, and two interesting features studied. Fast oscillations of large perturbations in density and smaller perturbations in temperature have been observed just after the pellet injection. In addition, the characteristics of the sawtooth crash during the temperature recovery phase of the pellet injected plasma have been studied by examining the density profiles before and after the crash, which shows that an increased particle transport exists at the crash.

Additional information

Authors: SATO K N ET AL., National Institute for Fusion Science, Nagoya (JP);KOGOSHI S, Science University of Tokyo (JP);AKIYAMA H, Kumamoto University (JP);BAEK W ET AL., Institut für Plasmaphysik, Kernforschungsanlage Jülich GmbH, Jülich (DE);BOEDO J, University of California, Los Angeles (US);GRAY D, University of California, Los Angeles (US);OGIWARA N, JAERI, Naka-gun (JP)
Bibliographic Reference: Article: Proceedings of the 18th European Conference on Controlled Fusion and Plasma Physics, Vol. 15C (1991) Part I, pp. 333-336
Record Number: 199210127 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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