English: Electron beam transfer in ESEM from vacuum above, through differential pumping stage 1 at pressure p1 to chamber at pressure p0, creation of weak electron skirt above pressure limiting aperture PLA1 and final electron skirt surrounding the electron probe in the gas above specimen.
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Author
Gerry Danilatos
Image title
Basic ESEM gas pressure stages with specimen chamber at pressure p0, stage 1 at p1, stage 2 at p2, pressure limiting apertures PLA1 and PLA2, specimen transfer chamber (sp-tr), pump manifold, gas supply and electron beam transfer from gun to specimen