Beam dynamics simulation and beam commissioning preparation in the RAON accelerator

Abstract

The RAON (Rare Isotope Accelerator complex for ON-line experiments) accelerator that can accelerate various kinds of beams from proton to uranium using superconducting radio-frequency (RF) cavities is currently under construction with the goal of completion in 2021 by the Rare Isotope Science Project in Daejeon, Korea. At Sindong site in Daejeon, the accelerator equipment of the low energy linac section consisting of the quarter-wave resonator (QWR) and half-wave resonator (HWR) cavities is being installed in 2020, and the installation of accelerator equipment including single-spoke resonators (SSR1 and SSR2) cavities in the high energy linac section will be completed by the end of 2021. According to the installation schedule, we are preparing the beam commissioning to verify the performance of the accelerator equipment and to achieve the desired beam parameters. For the successful beam commissioning, several physics application tools to be used at the beam commissioning are being developed, and the beam dynamics studies have been also continued. Here we will present ongoing beam dynamics studies and beam commissioning scenarios under planning. In addition, we will introduce the application tools being developed for successful beam commissioning in the RAON accelerator.

Beam test results of the orbit correction at the low-energy superconducting accelerator section in the RAON accelerator

“…As the construction of the RAON accelerator progresses, the beam commissioning has been also conducted from the injector section since 2020. For the successful beam commissioning, various beam dynamics researches have been carried out with machine errors [5][6][7], and several physics application tools have been also developed in connection with the control system [8]. During the beam commissioning, the orbit correction based on the singular value decomposition (SVD) method [9] was carried out to prevent the beam loss and to improve the beam transmission at the LEBT section [10] and the MEBT section [11].…”