High Intensity Neutron Source

这个SBIR第二阶段的提案解决了开发一种新的，密封的，14 MeV（或2.5 MeV）中子源的问题，该中子源可以在高输出通量下运行，寿命长。强脉冲放电（IPD）中子源使用一个简单的冷阴极离子发生器和分布式离子提取几何结构，以200 keV的能量将高分数的原子氘离子输送到装载氚的目标。能量在14 MeV范围内的中子是通过D-T （T(D, n)4 He）聚变反应产生的；2.5 MeV载氘靶。在SBIR一期项目中，包括离子束实验和概念设计开发，证明了IPD中子源概念的基本可行性。第二阶段将通过建造和运行一个200千伏实验室原型IPD中子源系统来完成可行性论证。本项目包括：(1)离子发生器的优化；(2)密封200kv IPD中子源的设计与组装；(3)氢源表征；(4)氘操作和D-D反应产生的2.5 MeV中子通量的测量（由此可以推算出14 MeV通量）；(5)在D-T中子通量为5 × 10 12 n/秒（比商用密封源高50倍）和通量密度为3 × 10 10 n/cm2-秒的条件下进行寿命测试，目标是达到300小时的运行寿命。＊＊＊

9320458 Bayless This SBIR Phase II proposal addresses the problem of developing a novel, sealed, source of 14 MeV (or 2.5 MeV) neutrons which can operate at high output flux with long life. The Intense Pulsed Discharge (IPD) neutron source uses a simple cold-cathode ion generator and a distributed ion extraction geometry to deliver a high fraction of atomic deuterium ions at energies of 200 keV to a tritium-loaded target. Neutrons with energies in the range of 14 MeV are generated through D-T (T(D, n)4 He) fusion reactions; 2.5 MeV deuterium-loaded target. The basic feasibility of the IPD neutron source concept was demonstrated in a SBIR Phase I project that included ion beam experiments and conceptual design development. Phase II will complete the feasibility demonstration by constructing and operating a 200 kV laboratory prototype IPD neutron source system. This project includes: (1) optimization of the ion generator; (2) design and assembly of a sealed 200 kV IPD neutron source; (3) source characterization with hydrogen; (4) operation with deuterium and measurement of the 2.5 MeV neutron flux resulting from D-D reactions (the 14 MeV flux can be projected from this); and (5) life testing with the goal of operational life of 300 hours under conditions representative of a D-T neutron flux of 5x10 12 n/sec (50 times greater than available with commercial sealed sources) and a flux density of 3x10 10 n/cm2-sec. ***