Orbit correction with argon beam at the low energy beam transport section of the RAON accelerator

The RAON accelerator has been developed to contribute to various scientific programs by generating and accelerating various kinds of ion beams. Since 2019, the beam commissioning of the injector section, which consists of an electron cyclotron resonance ion source (ECR-IS), a low energy beam transport section, a radio-frequency quadrupole accelerator, and a medium energy beam transport section, has been in progress using an argon and an oxygen beams. To transport the beam in safe to the superconducting linear accelerator section, the distortion of the beam orbit caused by the machine errors in the injector section should be depressed to avoid the unexpected beam loss. For this reason, the study for the orbit correction has been carried out, and recently the beam test with an argon beam is in progress to correct the distorted beam orbit based on the simulation results at the low energy beam transport section. In this paper, we will show the simulation results of the beam dynamics with an argon beam reflecting the locations of the devices at the low energy beam transport section in the RAON accelerator, and describe the orbit correction simulations with the singular value decomposition method. In addition, we will present the experimental result of the orbit correction using the argon beam generated by the ECR-IS.