open access

https://hdl.handle.net/2115/766

Electron acceleration in gas by impulse electric field and its application to selective promotion of an electron–molecule reaction

英語

2003-08-21

Institute of Physics

Journal of Physics D: Applied Physics

36(16)

1994-2000

We have simulated electron acceleration under short intense impulse electric fields of 0.1–1 kV cm-1 strength and ~1 ns duration in N2 at 65.5 Pa. The electron acceleration is completed in a practically collisionless condition when the impulse duration is comparable with or shorter than the electron mean free time. On the basis of this feature, we have proposed a way to produce a group of monoenergetic electrons. The electron energy after acceleration is controllable by the impulse strength and duration, and we have demonstrated selective promotion of the excitation producing N2(A 3Σu+) metastable excited molecules. The selectivity has been quantified as the efficiency of the electron energy utilized for the target reaction, and efficiencies of 20–30% have been achieved in this simulation. These values are higher than those of electron swarms in DC equilibrium, in which the efficiency is at most 10%. The electron behaviour under impulse electric fields and the dependence of the energy efficiency on the impulse profile have been investigated.

学術雑誌論文

Accepted Manuscript

Copyright (c) 2003 IOP Publishing Ltd.

00223727