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An experimental study of the generation of runaway electrons in TEXTOR has been performed. From the infrared synchrotron radiation emitted by relativistic electrons, the number of runaway electrons can be obtained as a function of time. In low density discharges runaways are created throughout the discharge and not predominantly in the startup phase. From the exponential increase in the runaway population and the ongoing runaway production after the density is increased, it is concluded that the secondary generation, i.e. the creation of runaways through close collisions of already existing runaways with thermal electrons, provides an essential contribution to the overall runaway production. The effective avalanche time of this secondary process is determined to be t(eff) = 0.9 +/- 0.2 s.

Additional information

Authors: JASPERS R, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL);LOPES CARDOZO N J, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL);SCHÜLLER F C, FOM Instituut voor Plasmafysica, Rijnhuizen, Nieuwegein (NL);FINKEN K H, Forschungszentrum Jülich GmbH (KFA) (DE);MANK G, Forschungszentrum Jülich GmbH (KFA) (DE);HOENEN F, Forschungszentrum Jülich GmbH (KFA) (DE);BOEDO J A, University of California at Los Angeles, Institute for Plasma and Fusion Research (US)
Bibliographic Reference: Article: Nuclear Fusion, Vol. 33 (1993) No. 12, pp. 1775-1785
Record Number: 199410600 / Last updated on: 1994-11-28
Original language: en
Available languages: en