WALSH, J.L ... et al, 2008. Atmospheric-pressure gas breakdown from 2 to 100 MHz. Applied Physics Letters, 93(22), article 221505, pp.1-3.
We report a detailed study of breakdown voltage of atmospheric-pressure helium gas between two
parallel-plate electrodes from 2 to 100 MHz. Experimental data show that the breakdown voltage
reduces initially with increasing frequency due to a diminishing contribution of drift-dominated
electron wall loss and then begins to increase with increasing frequency. The latter is contrary to the
current understanding that relies largely on the electron wall loss mechanism. Particle-in-cell
simulation suggests that rapid oscillation of the applied voltage prevents electrons from reaching
their maximum achievable kinetic energy, thus compromising the ionization efficiency and
increasing the breakdown voltage.
Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the authors and the American Institute of Physics. This article appeared in the journal, Applied Physics Letters, and may be found at: http://link.aip.org/link/?APPLAB/93/221505/1