Energy Research, Vol. 4, Issue 1, Mar  2020, Pages 11-20; DOI: https://doi.org/10.31058/j.er.2020.41002 https://doi.org/10.31058/j.er.2020.41002

Real Physics of Electron Transfer (Drift) in Gas Substance: Explanation of Electron “Abnormal” Fast Transfer and Still Missed Fundamental Transfer Properties

Energy Research, Vol. 4, Issue 1, Mar  2020, Pages 11-20.

DOI: https://doi.org/10.31058/j.er.2020.41002

Igor A. Boriev 1*

1 Chernogolovka Branch of the N.N. Semenov Federal Research Centre for Chemical Physics, Russian Academy of Sciences, Moscow, Russia

Received: 18 November 2019; Accepted: 31 December 2019; Published: 10 March 2020

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Abstract

Known problem of “abnormal” fast transfer of electrons in tokamak plasma, what violates desired condition for controlled thermonuclear fusion, is explained taking into account real physics of electron transfer (drift) in gas substance. An explanation of this problem is simple: drift velocity of elastically scattered electrons in gas is significantly greater than the result of usually accepted calculation. According to conservation law for momentum of electron transfer (drift), the value of drift velocity is proportional to momentum relaxation time, which is unknown a priori. Therefore it became accepted to replace this time by electron free path time, which may be calculated and is wrongly considered as momentum relaxation time for elastically scattered electrons. However, developed theory, first based on real physics of electron drift in gas matter, gives that relaxation time is greater (from 16 to 4 times) than the electron free path time. Such wrong replacement leads to significant underestimation (16 times for thermal electrons) of calculated electron drift velocity (mobility). Obtained result is consequence of very small electron mass relative to that of gas particles and means that transfer of electrons in gas at elastic (and isotropic) scattering should be really so fast. This paper also shows that developed statistically correct theory reveals early unknown two important properties of electron transfer (drift) and heating in atomic gas under electric field force. Thus, to describe entirely the drift of electrons in gas matter, where they are scattered and so don’t move freely, it is necessary use not only the mass of free electron, but also the effective mass, which is equal nearly to the mass of gas particle. The use of effective mass concept, which is well known for solid state physics but never used for the gas phase, first reveals true relation of electron drift velocity with electron velocity distribution function and indicates significant anisotropy of this function for hot electrons, which are heated by transfer in strong fields.

Keywords

Real Physics of Electron Drift in a Gas, “Abnormal” Fast Electron Transfer, Tokamak Problem, Missed Fundamental Properties of Electron Transfer

Copyright

© 2017 by the authors. Licensee International Technology and Science Press Limited. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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