Research for Dependency on temperature variation and property of radiation resistance of artifical diamond radiation detectors

用超高压合成法制备人造金刚石片，经化学腐蚀后放置电极制成辐射探测器。研究了这种金刚石辐射探测器的两电极间漏电流和重离子束辐照Am 241产生的α粒子的能量分辨。这些结果证实了辐射损伤。本基金研制了真空室、真空泵和包括高分辨率前置放大器在内的电路，以评估金刚石探测器的性能。用α粒子辐照金刚石探测器，研究了金刚石探测器对α粒子的能量分辨率。在HIMAC中能过程中，用6 MeV/u的氦束以高剂量（1.1 × 1013粒子/cm ~ 2）照射探测器，在近红外光谱（NIRS）中，用高精度的皮安计对探测器的漏电流进行了评估。在HIMAC的物理辐照室中，用430 MeV/u的碳束以2.1 × 10 ~（11）粒子/cm ~ 2的密度辐照探测器。然而，其漏电流和能量分辨率并没有变差。对于硅探测器，辐射损伤的退化发生在1 × 1011粒子/cm 2的α粒子辐照和1 × 108粒子/cm 2的核裂变粒子辐照。因此，人造金刚石探测器必须具有良好的抗辐射损伤性能。这些结果为我们生产下一代人造金刚石探测器提供了参考。

An artificial diamond plate produced with super high presser synthetic method was etched chemically and put electrodes and produced as a radiation detector. This diamond radiation detector was investigated leakage current between two electrodes and energy resolution irradiated alpha particles from Am 241 after irradiation of heavy ion beam. Radiation damage was confirmed with these results. In this fund, a vacuum chamber, a vacuum pomp and electric circuits including a high resolution pre-amplifier were prepared to evaluate the property of the diamond detectors. Alpha particles were irradiated to the diamond detectors and the energy resolution for the alpha particles of the detector was researched. In addition, current leakage was also evaluated by a pico-Ampere meter with high accuracy whether vias voltage could be adopted to the detector.In medium energy course of HIMAC in NIRS, helium beams with 6 MeV/u were irradiated to the detector with high dose (1.1 × 1013 particles/cm2). And, in physics irradiation room of HIMAC, carbon beams with 430 MeV/u were irradiated to the detector with 2.1 ×1011 particles/cm2. However, its leakage current and energy resolution did not become worse. For silicon detectors, degradation from radiation damage happens with alpha particles irradiation of 1 × 1011 particles/cm2 and nuclear fission particles of 1 × 108 particles/cm2. So that, the artificial diamond detector must have good resistance property for radiation damage. These results shows a hint for our production of the next artificial diamond detectors.