D–D neutron generator development at LBNL

The plasma and ion source technology group in Lawrence Berkeley National Laboratory is developing advanced, next generation D–D neutron generators. There are three distinctive developments, which are discussed in this presentation, namely, multi-stage, accelerator-based axial neutron generator, high-output co-axial neutron generator and point source neutron generator. These generators employ RF-induction discharge to produce deuterium ions. The distinctive feature of RF-discharge is its capability to generate high atomic hydrogen species, high current densities and stable and long-life operation. The axial neutron generator is designed for applications that require fast pulsing together with medium to high D–D neutron output. The co-axial neutron generator is aimed for high neutron output with cw or pulsed operation, using either the D–D or D–T fusion reaction. The point source neutron generator is a new concept, utilizing a toroidal-shaped plasma generator. The beam is extracted from multiple apertures and focus to the target tube, which is located at the middle of the generator. This will generate a point source of D–D, T–T or D–T neutrons with high output flux. The latest development together with measured data will be discussed in this article.