Abstract In ITER, the bolometer diagnostic is foreseen to provide the measurements for the total plasma radiation. Sensors need to withstand the harsh environmental conditions. Most prominent among those is the nuclear environment with neutron fluxes up to 10 13 n cm 2 s at the locations of bolometers, which result in a radiation dose of up to 0 . 3 dpa in Si3N4. Original metal resistor bolometer sensors based on Au-absorbers on a mica substrate with Au-meanders failed when exposed to fast neutron fluences corresponding to 0.1 dpa. Various material tests under irradiation identified ceramic materials like Al 2 O 3 , AlN or Si3N4 together with Pt meanders as promising alternatives. Based on these ideas a development campaign was initiated to produce a radiation hard bolometer sensor. Two approaches resulted in good mechanical stability under thermal cycling: Au absorbers supported by a Si3N4 membrane and Au absorbers on a silicon base plate which is hung up by flexure hinges. In order to assess their resistance against irradiation, tests have been conducted in the Budapest Neutron Centre. The test campaign demonstrated for the first time that bolometer sensors can withstand irradiation doses corresponding up to 0.3 dpa in Si3N4, which is higher than the value of 0.1 dpa requested by ITER project requirements, while their meander resistance measured after irradiation increased only by 20–30 Ω .

中文翻译：

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ITER 辐射热计传感器原型的辐照测试

摘要 在 ITER 中，预计辐射热计诊断将提供对总等离子体辐射的测量。传感器需要承受恶劣的环境条件。其中最突出的是在辐射热计位置具有高达 10 13 n cm 2 s 的中子通量的核环境，这导致高达 0 . 3 dpa 在 Si3N4 中。当暴露于对应于 0.1 dpa 的快速中子注量时，基于 Au 吸收器的原始金属电阻辐射热计传感器在具有 Au 曲折的云母基板上失效。辐照下的各种材料测试确定陶瓷材料如 Al 2 O 3 、AlN 或 Si3N4 以及 Pt 曲折作为有前途的替代品。基于这些想法，开始了生产硬辐射测辐射热计传感器的开发活动。两种方法在热循环下产生良好的机械稳定性：由 Si3N4 膜支撑的 Au 吸收器和由弯曲铰链悬挂的硅基板上的 Au 吸收器。为了评估它们对辐射的抵抗力，在布达佩斯中子中心进行了测试。测试活动首次证明，辐射热计传感器可以承受相当于氮化硅中高达 0.3 dpa 的辐照剂量，高于 ITER 项目要求的 0.1 dpa 值，而其辐照后测量的曲折电阻仅增加了 20– 30Ω。测试已在布达佩斯中子中心进行。测试活动首次证明，辐射热计传感器可以承受相当于氮化硅中高达 0.3 dpa 的辐照剂量，高于 ITER 项目要求的 0.1 dpa 值，而其辐照后测量的曲折电阻仅增加了 20– 30Ω。测试已在布达佩斯中子中心进行。测试活动首次证明，辐射热计传感器可以承受相当于氮化硅中高达 0.3 dpa 的辐照剂量，高于 ITER 项目要求的 0.1 dpa 值，而其辐照后测量的曲折电阻仅增加了 20– 30Ω。