Study of a fast ablative capillary discharge dedicated to soft x-ray production

Abstract

A capillary discharge has been developed to produce pulses of intense soft x-ray radiation of tens of nanoseconds duration. The soft x-ray photons were emitted in a plasma column resulting from polyethylene in capillary wall ablation. The spectrum was dominated by the C IV, C V, and C VI emission lines in the soft x-ray spectral range. The experimental value of the electrical circuit inductance has been measured and compared to the calculated one. The electron temperature was estimated to be higher than 50 eV from the plasma resistivity measurement. The time dependence of the electron density outside the capillary channel has been determined using spectroscopic measurement in the visible range. The time dependence of the electron temperature has been determined from the intensity ratio of C V and C VI emission lines, using a collisional radiative equilibrium code.

On the model of Teflon ablation in an ablation-controlled discharge

“…The problem of the ablation controlled discharge has a common general interest in a number of applications such as electric fuses, circuit breakers, soft x-ray, pulsed plasma thrusters and extreme ultraviolet sources [1][2][3][4][5]. In these devices, the discharge energy is principally dissipated by ablation of wall material, which then forms the main component of the discharge plasma.…”

Expérience et simulation d'une décharge capillaire ablative pour la production de rayonnement UVX cohérent et incohérent

“…Des mesures de densité (N e ) et de température électroniques (T e ) ont été effectuées et publiées [3]. La densité électronique mesurée est de l'ordre de 10 19 cm" 3 ; la température électronique obtenue expérimentalement atteint 80 eV juste après le maximum de courant.…”

Detection of x-ray emission in a nanosecond discharge in air at atmospheric pressure

“…[1][2][3] Up to now, pulsed discharge mechanism is not very clear and is related to the overvoltage conditions. [1][2][3] Up to now, pulsed discharge mechanism is not very clear and is related to the overvoltage conditions.…”