Measurements of ion flow emanating from plasma formed by short electron pulse on a dielectric surface

The dielectric target has been made of polyethylene. High voltage short pulse (150kV, 5ns) generator RADAN was used. Ion flow was analysed with Thomson spectrometer. Hydrogen ions has energies up to 400keV, deuterium and carbon ions has energies up to 5keV. There are H, D, C⁺¹, C⁺², C⁺³, C⁺⁴ ions in the plasma flow. Most probable energy of ion fraction depends on its ion charge. At increase the anode-dielectric gap to 2mm in the ion flow hydrogen ions are observed only, Energies of protons grow up to distance 7mm. Hydrogen ions can be accelerated by the several separate bursts having narrow energy distribution.