HIGH POWER MAGNETICALLY CONFINED PLASMA DUPLEXER.
Rept. no. 9 (Final), 31 May 63-31 Aug 65,
ELCON LAB INC PEABODY MASS
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The theory of confining a microwave gas plasma discharge by means of a magnetic field is presented. Two types of magnetic fields, cusp shaped and mirror are analyzed. Both type fields are investigated experimentally using suitable microwave cavity structures and plasma containers. The high power experimental microwave equipment uses a traveling wave resonant ring simulator to ionize the plasma at pulsed powers up to 70 megawatts peak, 70 kilowatts average. The major technical problem associated with the use of a stable confinement system is the inherently long recovery time. The use of both chlorine as an attaching gas and a quartz wool filled plasma container reduces recovery time to practical ranges, but conflicts somewhat with the fundamental principles of confinement. The use of a quartz wool filled plasma container with cusp magnetic field seems to provide the best compromise between magnetic confinement principles and microwave performance. Author
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