Speaker
Description
Lanzhou Ion Therapy Company, Ltd. (LANITH) began the research and development of miniaturized heavy ion therapy devices since 2022. The Gantry superconducting magnet, which composed of a curved dipole magnet and two quadrupole magnets at both ends of the dipole coil, is the core component of the whole device. At present, this project has completed manufacturing process for a prototype and a batch of gantry magnets, and started a series of cryogenic tests.
In order to test magnet winding and impregnation process, a gantry prototype magnet without iron core was processed and tested at first. After excitation test result of prototype reached the target parameters, the cryogenic tests of a batch of gantry magnets with iron core were conducted. In this paper, the cryogenic test process and analysis of test results are introduced emphatically. Some specific test contents were tested detailly, like quench protection process, magnetic field distribution and uniformity measurement results, dipole-quadrupole joint excitation and fast ramping operation results. After completed cryogenic test in liquid helium, the Gantry magnets are planned to be loaded into a conduction cooling cryostat for extra testing of cooling process, AC loss and magnetic field uniformity.
