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Experimental investigation of runaway electron generation in TEXTOR

R. Jaspers, K.H. Finken, G. Mank, F. Hoenen, J.A. Boedo, N.J.L. Cardozo, F.C. Schuller1993年被引用 101Nuclear FusionIF 3出版社

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 (ne < 1 × 1019 cm-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 teff = 0.9 ± 0.2 s

日本語訳

TEXTORにおけるランナウェイ電子の生成に関する実験的研究が行われた。相対論的電子から放出される赤外シンクロトロン放射から、ランナウェイ電子の数が時間の関数として得られる。低密度放電(ne < 1 × 10^19 cm^-3)では、ランナウェイ電子は放電全体を通じて生成され、主に立ち上げ段階で生成されるわけではない。ランナウェイ電子集団の指数関数的増加と、密度増加後に継続するランナウェイ電子生成から、二次生成、すなわち既存のランナウェイ電子と熱電子との近接衝突によるランナウェイ電子の生成が、ランナウェイ電子生成に本質的な寄与をしていると結論づけられる。この二次過程の有効アバランシェ時間は、teff = 0.9 ± 0.2 sと決定された。

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