Development of a High-Current Superconducting Cavity for the Advanced Fusion Neutron Source and Licensing for HPGSL

Abstract

Use of the Advanced Fusion Neutron Source (A-FNS) for testing materials in a future fusion DEMO reactor aims to provide an accelerator-based D-Li neutron source to produce high-intensity, high-energy neutron flux to test samples as possible candidate materials. As the accelerator system validation activity to demonstrate deuteron acceleration by the low-energy section of an IFMIF deuteron accelerator up to 9 MeV with a beam current of 125 mA in CW, a linear IFMIF prototype accelerator (LIPAc) was commissioned under the Broader Approach (BA) Agreement of the fusion program between Japan and the EU. A SRF linac containing eight half-wave resonators (HWRs) operating at 175 MHz and eight focusing solenoids to accelerate the energy from 5 MeV to 9 MeV and the licensing required by the High-Pressure Gas Safety Law (HPGSL) in Japan are reported.