Investigation of the continual component of high-current vacuum arc radiation in the optical spectral range

Method of determination of the electron density in the gap of high-current vacuum arc on the base of continual radiation analysis

“…Some assessment measurements at very high current densities that are illustrative in nature were made with small delays at the stage of the arc development. Paper [6] describes in detail the processing of the obtained radial distributions (smoothing, averaging, and abelization). Fig.…”

“…In our experiments we used the experimental setup described in detail in [6,11]. Since the measurements were performed in the visible spectrum, the optical system was modified.…”

“…Previously, we analyzed emission spectrum of HCVA stabilized by axial magnetic field (AMF) with copper electrodes and showed existence of a "window" (free from lines) near λ = 634 nm, in which continuum emission can be measured, and which remains "clean" in regimes with high current densities J up to several kA/cm 2 [6]. This opens possibilities of determining n e by measuring the intensity of continuum emission in conditions that are characteristic of arcs stabilized by AMF in vacuum interrupters intended for switching currents of ~ 10 2 kA (taking into account the aperiodic component) [7].…”