An ion accelerator, RAON is under construction in Daejeon, Korea, by the Rare Isotope Science Project (RISP) in the Institute of Basic Science (IBS). In this accelerator various ions, such as uranium, proton, carbon, calcium, etc. are planned to be accelerated by using four kinds of superconducting cavities. The four kinds of cavities are the quarter wave resonator (QWR), half wave resonator (HWR), and two kinds of single spoke resonators (SSRs) with different betas. Recently, the upgrade and the performance tests with newly developed field-programmable gate array (FPGA)-based digital low level radio frequency (LLRF) and superconducting cavities were conducted at the superconducting radio frequency (SRF) facility. In this paper, the status and the test result of the RAON LLRF will be described.

中文翻译：

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基于FPGA的RAON加速器数字LLRF的升级与性能测试

基础科学研究所 (IBS) 的稀有同位素科学项目 (RISP) 正在韩国大田建造离子加速器 RAON。在该加速器中，计划使用四种超导腔加速铀、质子、碳、钙等各种离子。这四种腔是四分之一波谐振器（QWR）、半波谐振器（HWR）和两种不同β的单辐谐振器（SSR）。最近，在超导射频（SRF）设施中，对新开发的基于现场可编程门阵列（FPGA）的数字低电平射频（LLRF）和超导腔进行了升级和性能测试。在本文中，将描述RAON LLRF的状态和测试结果。