REFRACTION OF DIRECTED SHOCK ELECTRONS AT PLANAR SOLID SURFACES

H. Rothard , K. Kroneberger , M. Burkhard , C. Biedermann , J. Kemmler , O. Heil , K. Groeneveld

Shock electrons are ejected in a direction perpendicular to the shock front of the wake cone, the ion induced collective electron density fluctuation in the electron plasma of the solid. They have been observed by measuring doubly differential secondary electron distributions from thin solid foils in forward direction. Shock electrons represent a unique internal source of directed secondary electrons and thus offer the possibility to study the refraction of electrons at a solid surface. Nearly planar, smooth solid foi1 surfaces are obtained by sputter-cleaning in ultrahigh vacuum. The smoothing can be observed by scanning electron microscopy.

Domains: Physics archives

H. Rothard, K. Kroneberger, M. Burkhard, C. Biedermann, J. Kemmler, et al.. REFRACTION OF DIRECTED SHOCK ELECTRONS AT PLANAR SOLID SURFACES. Journal de Physique Colloques, 1989, 50 (C2), pp.C2-105-C2-110. ⟨10.1051/jphyscol:1989219⟩. ⟨jpa-00229417⟩