[1G02-04] Fusion Neutron Source

[1G04] Effect of the water-cooling feedthrough system for the cathode on the neutron production rate in the discharge type of fusion neutron source

*Toshiro Sakabe¹, Takaya Ishii¹, Keisuke Mukai^1,2, Juro Yagi¹ (1. Kyoto Univ., 2. NIFS)

Keywords:Fusion reaction, Neutron source, Water-cooling feedthrough, Hydrogen isotope desorption

Since deuterium-deuterium fusion reactions mainly occur on electrodes in the discharge type of fusion neutron source, deuterium desorption is undesirable for the neutron production rate (NPR). Applying the cathode cooling system is expected to suppress deuterium desorption. This study shows the cathode cooling effect on the NPR and the controllability of the device. The water-cooling feedthrough system was constructed and applied to the neutron production experiment setup. In the initial experiment using the stainless-steel cathode, the NPR in the case with the water-cooling system was about 1.5 times higher than that of the case without the water-cooling system. The suppression of deuterium desorption by the water-cooling system results in the improvement of the NPR.