CVD diamond alpha-particle detectors with different electrode geometry.
CVD diamond alpha-particle detectors with different electrode geometry.
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DOI：
10.1364/opex.13.008612
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发表时间：
2005-10
期刊：
影响因子：
3.8
通讯作者：
Linjun Wang;Yanyan Lou;Q. Su;W. Shi;Yiben Xia
中科院分区：
文献类型：
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作者：
Linjun Wang;Yanyan Lou;Q. Su;W. Shi;Yiben Xia
在本文中，两种类型的探测器，一个与共面和其他与三明治的几何形状使用相同的CVD金刚石膜，以研究膜的微结构对金刚石膜α粒子探测器的性能的影响。共面结构探测器的平均电荷收集效率为42.9%，三明治结构探测器的平均电荷收集效率为37.4%。拉曼散射研究直接表明，两种探测器的计数、收集效率和光电流的不同主要是由于金刚石薄膜最终生长面和成核面之间的微结构特征不同所致。在α粒子辐照下，三明治结构的探测器在不同电场下的能量分辨率变化趋势与共面结构的相似。两种探测器的能量分辨率都达到了1.1%。
In this paper, two types of detectors, one with a coplanar and the other with a sandwich geometry using an identical CVD diamond film, were fabricated in order to investigate the effects of the film microstructure on the performance of diamond film alpha-particle detectors. An average charge collection efficiency of 42.9% for the coplanar structure and of 37.4% for the sandwich structure detectors was obtained, respectively. Raman scattering studies directly demonstrated that the different counts, collection efficiencies and photocurrents of the two types of detectors mainly resulted from the different micro-structural features between the final growth side and the nucleation side of the diamond film. Under alpha particle irradiation the detector with sandwich geometry had a similar trend on energy resolution with coplanar geometry under different applied electric field. A good energy resolution of 1.1% was obtained for both detectors.