Speaker
Description
The preliminary beam test of the CYCIAE-230 cyclotron and its beam transportation system to the isocenter of the gantry was successfully conducted at the end of December 2023. During this, various beam transportation tests with different energies are carried out to verify the design of the energy selection system. The ESS consists of a pair of carbon wedge shape degraders, an apochromatic magnet system, and a related beam shape, the moment selecting slits. Once a beam energy is selected, the rest of the beam transportation system is controlled to follow the ESS, including synchronization of the 51 beamline magnets in total. The CYCIAE230 superconducting cyclotron extracts a fixed energy beam of 242.25MeV. The double wedge degrader and the beamline system are capable of modulating and transporting the beam with energy in a range of 242.25 MeV to 71.84 MeV. In energy range from 232.12 MeV to 71.84 MeV, it experimentally verified to be capable of switching down an energy layer (2mm water depth equivalent) within 50 milliseconds. Different from other degrader designs, the CIAE degrader has a large moment of Inertia, which makes it difficult to achieve fast control. A dedicated energy selection control system has been developed by CIAE, using the VxWorks real-time operating system and its multi-task scheduling to achieve fast control of the degrader and synchronization of the related magnets. To facilitate the commissioning of the beamline, an interpolation algorithm is also included in the reported control system, to automatically calculate the setpoints for different beam energy.
| Minioral | Yes |
|---|---|
| IEEE Member | No |
| Are you a student? | No |
