Abstract

The Middle East Technical University Defocusing Beamline (METU-DBL) is being constructed in order to perform single event effects tests for the electronic components in accordance with the European Space Agency (ESA) European Space Components Coordination (ESCC) No. 25100 standard. The aim of this beamline is to provide a suitable test area at the end of the beamline using the beam elements, such as collimators and magnets. Shielding is a crucial precaution for the safety of the radiation workers and the protection of the electronic components from the detrimental effects of radiation. In the METU-DBL, shielding studies have started with the first protective collimator because the proton beam hits the collimator, resulting in secondary particle production that increases the dose level in the research and development (R&D) room. The shielding studies of the first protective collimator used in the pretest setup of the METU-DBL are presented in this study. The whole beamline was defined in the FLUKA simulation program to calculate the absorbed radiation dose and make shielding designs. Various shielding designs were studied in FLUKA and the 15th one was selected as a suitable shielding design for the first protective collimator. This shield was manufactured and mounted on the first protective collimator and used in 20 irradiations during the pretests. At the end of 20 irradiations, it was observed that the shield is effective at decreasing the dose level in the R&D room.

摘要

正在建造中东技术大学散焦光束线 (METU-DBL)，以便根据欧洲航天局 (ESA) 欧洲空间组件协调 (ESCC) 第 25100 号标准对电子组件进行单事件效应测试。该光束线的目的是使用光束元件（例如准直器和磁铁）在光束线的末端提供合适的测试区域。屏蔽是辐射工作人员安全和保护电子元件免受辐射有害影响的重要预防措施。在 METU-DBL 中，屏蔽研究从第一个保护准直器开始，因为质子束撞击准直器，导致二次粒子产生，增加了研发 (R&D) 室的剂量水平。本研究介绍了 METU-DBL 预测试设置中使用的第一个保护准直器的屏蔽研究。在 FLUKA 仿真程序中定义了整个光束线，以计算吸收的辐射剂量并进行屏蔽设计。FLUKA 研究了各种屏蔽设计，并选择第 15 个作为第一个保护准直器的合适屏蔽设计。该防护罩是制造并安装在第一个保护准直器上的，并在预测试期间用于 20 次辐照。在 20 次照射结束时，观察到防护罩可有效降低研发室的剂量水平。在 FLUKA 仿真程序中定义了整个光束线，以计算吸收的辐射剂量并进行屏蔽设计。FLUKA 研究了各种屏蔽设计，并选择第 15 个作为第一个保护准直器的合适屏蔽设计。该防护罩是制造并安装在第一个保护准直器上的，并在预测试期间用于 20 次辐照。在 20 次照射结束时，观察到防护罩可有效降低研发室的剂量水平。在 FLUKA 仿真程序中定义了整个光束线，以计算吸收的辐射剂量并进行屏蔽设计。FLUKA 研究了各种屏蔽设计，并选择第 15 个作为第一个保护准直器的合适屏蔽设计。该防护罩是制造并安装在第一个保护准直器上的，并在预测试期间用于 20 次辐照。在 20 次照射结束时，观察到防护罩可有效降低研发室的剂量水平。