Properties of high pressure arc plasma

Plasma Parameters and Weakly Non-Ideal Behaviour of a High Density, Super-Atmospheric 2kA Cascade Arc in Argon

“…During this plateau the arc may be assumed to be in a stationary state. This statement is in agreement with the stability criterion formulated by Bauder [15] for 5 mm diameter cascade arc chambers with plates of % 2 mm thickness. Bauder investigated cascade arcs up to 300 bar at currents up to 250 A in argon.…”

“…This value touches the range, where Bauder [15] stated that arc ing between the plates may occur. Therefore special attention was paid to oscillations in electron tempera ture and density observed at the very beginning of the quasi-stationary phase of the current pulse.…”

“…15, where the measured electrical conduc tivity (ffmeas), normalized to the Spitzer conductivity (<7Sp), is given as a function of the Coulomb logarithm (In A). Some other experimental data obtained from argon arc discharges [15,33,35] are also shown.…”

“…Bauder and Devoto [14,15,33] investigated these effects in a cascade arc for pressures up to 300 bar and currents up to 150 A, obtaining current densities of about 8-106 A/m2. Goldbach et al [34] studied cascade arcs up to 175 A in the pressure range of 1-20 bar with a current den sity of about 9 • 106 A/m2.…”

“…Note that in the definition of the Debye shielding length (/lD) the in fluence of the ions is taken into account as defined in [28], viz. dd: Experimental points from this work, Zeff values given as annexes to these points; oo: experimental points from [15] and ++ from [35].…”