The evolution of two intense pulsed electron beams for an x-ray flash radiography
application is characterized in a coupling of experimental and simulation studies. For this …

We investigated a new cathode design and beam transport with the EPURE axis-1 injector
in order to increase the beam characteristics at 3.8 MeV, 80 ns FWHM from the 2.0 kA …

The generation of arcs in air at atmospheric pressure induced by static voltage and triggered
by x-ray pulses is analyzed. A static voltage is set between a cathode and an anode, and the …

Plasma dynamics are essential in high-power electron beam diodes, as they influence the
current density and can even cause gap closure because of fast expansion velocity during …

Radiative recombination cross sections of all the charge states of nitrogen and oxygen ions
are calculated in the central field and Hartree–Fock–Slater approximations. The …

A complex 0D collisional-radiative model (CRM) experimentally validated was used to
describe in details the time evolution of the densities of all the species present in a non …

In this paper, the literature on vacuum flashover and mechanisms are reviewed, and the
development of the Electron triggered polarization relaxation (ETPR) theory is the main …

This work is devoted to experimental analyses of plasmas induced by electrostatic
discharges in dielectric materials. Electrostatic discharges are produced in …

Les travaux de recherche restitués dans ce document ont été effectués sur la période [2010–
2020] au CEA-Gramat, et traitent des effets des rayonnements ionisants sur les systèmes …

Cette étude a été menée dans le cadre de la thèse afin d'augmenter les performances
radiographiques du premier axe d'Epure. L'objectif premier était d'augmenter la dose de …