The Vacuum Design and Simulation of BNCT02

BNCT02 consists of two sets of accelerators and five treatment terminals, enabling simultaneous treatment of two groups of cancer patients. Currently under construction is one of the units, consisting of an ECR ion source, a low energy beam transport (LEBT) line, a 2.8 MeV radio frequency quadrupole accelerator (RFQ), two high energy beam transport (HEBT) lines, two treatment terminals, and a temporary line with beam dump. Firstly, the vacuum design of BNCT02 is introduced. The pressure distribution of RFQ and HEBT under different states is simulated and calculated by using Molflow software, and compared with the measured results. Then, the deformation and temperature rise of the irregular chamber and the water-cooled chamber in HEBT are simulated, and the chamber design is optimized. Currently, the entire device is running stably, and the vacuum system meets the design requirements.