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THREE-PHASE ALTERNATING CURRENT PLASMATRONS (TREKHFAZNYE PLAZMATRONY PEREMENNOGO TOKA),
FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO
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The author presents two designs of three-phase alternating current plasmatrons intended for obtaining low temperature plasmas. The design of these plasmatrons differs by the number of electrodes three and six, cooling system arrangement, and dimensions. Both types were tested using argon, nitrogen, hydrogen, and helium gases at pressures between 1.5 and 15 atm. The plasmatrons were operated continuously for no more than 15 min due to limiting gas supply. The minimum currents at which they operated stably were 30 and 80 amp for 3-electrode and 6-electrode versions, respectively. The electrodes were made of tungsten 8-10 mm in diameter. Maximum test current and current density was 520 amp and 660 ampsq cm, respectively. The plasmatrons were cooled by water and their temperatures did not rise above 40-50C. Author
APPROVED FOR PUBLIC RELEASE