スロー・テータ・ピンチへのピンチ予備電離の適用とその結果

概要

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The preionization by Z-pinch discharge is applied to a low energy slow the ta-pinch for tne purpose of producing a plasma at a low gas pressure and without trapping field. A pulsed current of a few tens of kA with a width of about 10μsec is produced by condenser discharge using a non-lincar register. The characteristics of Z-pinched plasma are measured with optical methods using a laser as a light source. With a peak current of 15 kA, the degree of ioization of about 60% is obtained in the low pressure region, which is found to be suitable for the following theta-compression. The temperature of the theta-pinchud plasma with this preionization is consistient with that derived from a simple snow-plow model. Flute instabilities of m=3 occurs at the pressure higher than 80 mtorr even in the case of no bias field.
社団法人プラズマ・核融合学会の論文