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The design, construction and the test bed results for a novel compact gas gun injector for solid diagnostic pellets are investigated. The injector was optimised for the diagnostic requirements of the ASDEX Upgrade tokamak, yielding the possibility of a widely varying deposition profile of ablated material inside the plasma. The use of different propellant gases (He, N(2), H(2)) resulted in an accessible velocity range from about 150 m/s to more than 600 m/s. The injector provided both high efficiency and high reliability during the whole test bed operation period.

Additional information

Authors: LANG P T ET AL., Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);EGOROV S M ET AL., State University of St. Petersburg (RU)
Bibliographic Reference: Report: IPP 1/280 EN (1994) 19 pp.
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 199411502 / Last updated on: 1994-12-06
Original language: en
Available languages: en