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首页> 外文期刊>Plasma physics and controlled fusion >Search for thermonuclear neutrons in a mega-ampere plasma focus
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Search for thermonuclear neutrons in a mega-ampere plasma focus

机译：在兆安等离子体焦点中搜索热核中子

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摘要

Plasma focus experiments were carried out at a modified PF-1000 where the cathode disc was added in front of the anode. Experimental results indicated a fraction of thermonuclear neutrons on the mega-ampere current level. In order to prove the thermonuclear mechanism, the time of neutron production and the neutron energy spectrum were measured by time-of-flight (TOF) diagnostics. Neutron TOF signals showed that the neutron production was a multiphase process and more than one mechanism occurred simultaneously. The occurrence of the thermonuclear mechanism was most evident during the plasma stagnation at low deuterium pressures. At low filling pressures, the narrow width of the neutron energy spectra demonstrated an ion temperature of about 1 keV. The possibility of thermonuclear neutrons was studied also after the stagnation, during the main neutron emission. In this case, the thermonuclear mechanism could be verified by calculating the number of deuterons that participate in the fusion process. For the bulk of thermonuclear plasmas, a significant fraction of plasma should participate in fusion. Finally, the basic consideration of the thermonuclear mechanism in Z-pinches showed the reasonableness of the MagLIF concept.
机译：在改良的PF-1000上进行了等离子体聚焦实验，其中将阴极盘添加到阳极的前面。实验结果表明，在百万安培电流水平上，热核中子的比例很小。为了证明热核机理，通过飞行时间（TOF）诊断来测量中子产生时间和中子能谱。中子TOF信号表明中子产生是一个多相过程，同时发生了多种机理。在低氘压力下等离子体停滞期间，热核机制的发生最为明显。在低填充压力下，中子能谱的窄宽度表明离子温度约为1 keV。在停滞之后，在主要中子发射期间也研究了热核中子的可能性。在这种情况下，可以通过计算参与聚变过程的氘核的数量来验证热核机制。对于大部分热核血浆，很大一部分血浆应参与聚变。最后，Z夹中热核机理的基本考虑表明了MagLIF概念的合理性。

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