At the Korea Multi-purpose Accelerator Complex (KOMAC), a 100-MeV high-power proton linac has been used for proton-beam irradiation services for various applications and research programs, including material science, bio-medical science, semiconductor applications, as well as nuclear physics and basic science, since commissioning of the machine in 2013. Recently, demands for fast neutrons from users in the semiconductor industries are increasing to test the semiconductor device SER (soft error rate) or SEE (single event effect). At present, we provide pilot services to users with pulsed white-spectrum neutrons (max. neutron energy ∼100 MeV) generated at the beam dump, which is made of copper. However, the neutron energy should be increased at least to 200 MeV to meet international standards such as ISO26262 or JEDEC89A. For the upgrade of the linac energy to 200 MeV, we conducted a preliminary design study, including superconducting radio-frequency (SRF) based linac structure, a neutron generation target and a neutron utilization facility. The upgrade plan for the KOMAC linac, along with the preliminary results of the design study on the superconducting linac and neutron generation facility, will be given in this paper.

中文翻译：

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用于半导体器件大气辐射测试的 KOMAC 质子直线加速器升级计划

在韩国多用途加速器综合体 (KOMAC)，一台 100 MeV 高功率质子直线加速器已用于各种应用和研究项目的质子束辐照服务，包括材料科学、生物医学科学、半导体应用，如以及核物理和基础科学，自 2013 年机器调试以来。 最近，半导体行业用户对快中子的需求不断增加，以测试半导体器件 SER（软错误率）或 SEE（单事件效应）。目前，我们为用户提供在束流场产生的脉冲白谱中子（最大中子能量 ∼100 MeV）的试点服务，束流场由铜制成。但是，中子能量至少应增加到 200 MeV 才能满足 ISO26262 或 JEDEC89A 等国际标准。为了将直线加速器能量升级到200 MeV，我们进行了初步设计研究，包括基于超导射频（SRF）的直线加速器结构、中子产生靶和中子利用设施。本文将给出 KOMAC 直线加速器的升级计划以及超导直线加速器和中子发生设施设计研究的初步结果。