Density Distributions During the Neutron-Producing Phase of the Plasma Focus POSEIDON

作者：Schmidt Hellmut^*; Pisarczyk Tadeusz; Chodukowski Tomasz

来源：IEEE Transactions on Plasma Science, 2012, 40(12): 3265-3272.

DOI：10.1109/TPS.2012.2223472

• Neutron sources
• nuclear measurements
• optical interferometry
• plasma density
• plasma diagnostics
• plasma focus
• plasma pinch
• plasma sources

Interferometric density measurements revealed the existence of various phases in the neutron emission of the POSEIDON plasma focus, i.e., a compression to a minimum diameter of about 15 mm, followed by a slightly expanded quiescent phase (25 mm in diameter), an instability phase, and finally, a decay of the dense plasma structures. Maximum densities are in the range of 10(19) cm(-3). The double structure of the neutron pulses coincides with the following: 1) the compression to a minimum diameter; and 2) the later occurring instabilities. The estimated fraction of thermonuclear neutron production-in contrast to a rather complicated beam-target mechanism-amounts in both neutron pulses to less than 5%. This could be concluded using results of temperature measurements performed by laser scattering.

• 出版日期2012-12