Experimental Investigation of Runaway Electron Generation in Textor

TitleExperimental Investigation of Runaway Electron Generation in Textor
Publication TypeJournal Article
Year of Publication1993
AuthorsR. Jaspers, K.H. Finken, G. Mank, F. Hoenen, J.A Boedo, N.JL Cardozo, F.C Schüller
JournalNuclear Fusion
Volume33
Number12
Pagination1775-1785
Date PublishedDec
ISBN Number0029-5515
Abstract

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 (n(e)BAR < 1 X 10(19) m-3) 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 runaway production. The effective avalanche time of this secondary process is determined to be t(eff) = 0.9 +/- 0.2 s.

DOI10.1088/0029-5515/33/12/i02
PID

bc4c3e0d2384928adc6f3b86d5388167

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