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Analysis of a new electron-runaway mechanism and of record-high runaway-electron currents achieved in dense-gas discharges

It is shown that the ’new’ runaway criterion for electrons in dense gases suggested by Tarasenko and Yakovlenko (Usp. Fiz. Nauk 174 953 (2004) [Phys. Usp. 47 887 (2004)]) is actually not a criterion, and the ’upper’ curve of the U(Pd) dependence does not exist. Only the Z-shaped segment of U(Pd) in the region of small Pd, known for helium since the early 1930s, agrees with the reality. The decrease in the ionization coefficient with E/P increasing and the existence of Pdmin for helium have been known since the same time. Doubt is cast upon the ’record’ runaway-electron currents at P = 1 atm. The acceleration mechanism suggested in the above article has been known for a long time, and the interpretation of the ’record’ runaway-electron currents on this basis is the result of fitting the data to the formula that implies the lack of electron multiplication but is ’understood’ by Tarasenko and Yakovlenko as a runaway criterion. Nothing new has been added to the mechanism of volumetric discharge formation, but mistakes have been made.

Fulltext is available at IOP
PACS: 41.75.Fr, 51.50.+v, 52.80.Dy (all)
DOI: 10.1070/PU2005v048n10ABEH002805
URL: https://ufn.ru/en/articles/2005/10/c/
Citation: Babich L P "Analysis of a new electron-runaway mechanism and of record-high runaway-electron currents achieved in dense-gas discharges" Phys. Usp. 48 1015–1037 (2005)
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Оригинал: Бабич Л П «Анализ нового механизма убегания электронов и рекордных токов убегающих электронов, достигнутых в разрядах в плотных газах» УФН 175 1069–1091 (2005); DOI: 10.3367/UFNr.0175.200510g.1069

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