A Method for Measuring Electron Energy Distribution in a Plasma Focus

Abstract

We have proposed and demonstrated a novel non-contact electromagnetic deformable mirror actuator for spherical aberration compensation with simple configurations. The magnetic ring with low stiffness placed on a mirror deformed the mirror into an ideal parabolic shape by applying a magnetic force generated from an electromagnet underneath. We were able to control the deformation of the mirror by adjusting the applied voltage. The maximum deviation from ideal shape was less than 30 nm. In addition, a continuous change of the defocus aberration proportional to the 1.5-RMS /m deformation of the mirror was achieved. #

Spectral study of the electron beam emitted from a 3 kJ plasma focus

“…The whole system was calibrated and the calibration factor was 10.4 kA V −1 . The basic configuration of the electron energy analyser was inspired by the one reported by Hirano et al [39] with some modifications. The detector was mounted after a 90˚beam deflection.…”

Study on electron beam emission from a low energy plasma focus device

“…The direction of the emission of electrons and ions are opposite to each other and it is towards the anode for electrons. Only a few efforts were made to study the emission of electron beams from low and medium energy plasma focus devices [7][8][9][10][11]. Most of those studies concentrate on to know about the mechanism of electron beam generation by correlating with the emission of hard X-ray [8], ion beam [11,12], neutron [13] and electrical measurement [11].…”

Low-Energy Plasma Focus Device as an Electron Beam Source

“…The directions of the emission of ions and electrons are opposite each other and directed toward the anode for the electrons. The emitted electron beams exhibit energies ranging from few keV to hundreds of keV [ 20 , 21 ].…”