Experimental Observation of Hot Spots in a Filippov-Type Plasma Focus Device
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In this paper we have presented the experimental results of hot spots observation in different working conditions in Filippov-type Plasma Focus Device “Dena” (90 kJ, 25 kV), analyzing of these results have shown that the working conditions have great influence on hot spots formation. In using the pure gases like D2, Ar, Kr and Ne the formation of hot spots has been seen rarely, and it can be related to impurities like vapoured metal from the anode surface, also in using the light impurities hot spots were not formed, and only for the heavy impurities like Kr the formation of hot spots have been observed. The discharge voltage also plays an important role in hot spots formation, for voltages less than 16 kV, hot spots have not been observed. Also, using the conic insert anode leads to more and distinct hot spots than the case of flat one. The best results of hot spot observation in these experiments have been achieved by using a conic insert anode and D2 + 1% Kr as working gas.
KeywordsPlasma focus Hot spot Soft X-rays Pin-hole camera
The authors thank Mrs. T. Sharafi for edit of this paper.
- 3.V.A. Gribkov, Nukleonika 45(3), 149–153 (2000)Google Scholar
- 8.Eric J. Lerner, “Parameters for p11B fusion with the dense plasma focus: new results”, Conference. Current Trends in International Fusion Research, Washington, USA (2003)Google Scholar
- 12.V.V. Vikhrev, Sov. J. Plasma Phys. 12(4), 262–270 (1986)Google Scholar
- 13.H. Herold et al., Nucl. Fusion 29(8), 1255–1269 (1989)Google Scholar
- 14.H. Conrads, Nucl. Sci. Eng. 106, 299–307 (1990)Google Scholar
- 17.M.A. Tafreshi et al., Nukleonika 46(Suppl 1), S85–S87 (2001)Google Scholar