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Response of chemical vapor deposition diamond detectors to X-ray

机译：化学气相沉积金刚石探测器对X射线的响应

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摘要

The outstanding properties of diamond, such as radiation hardness, high carrier mobility, high band gap and breakdown field, distinguish it as a good candidate for radiation detectors. The detector's performance is strongly limited by the concentration of defects (grain boundaries and/or impurities) in chemical vapor deposition (CVD) diamond. We report the response of freestanding CVD diamond with a thickness of 300 μm and area of 2 X 2 cm~2, synthesized by a hot filament chemical vapor deposition (HFCVD) technique, to 5.9 keV X-ray radiation from a ~(55)Fe source. The linear Ⅰ - Ⅴ characteristics indicate that CVD diamond has good ohmic contacts. This detector also shows good results such as dark-current of 10~(-8) A, photocurrent of 10~(-6) A, energy resolution <0.4%, and a high ratio of signal to noise.
机译：钻石的杰出性能，例如辐射硬度，高载流子迁移率，高带隙和击穿场，使其成为辐射探测器的良好选择。检测器的性能受到化学气相沉积（CVD）金刚石中缺陷（晶界和/或杂质）浓度的强烈限制。我们报告了通过热丝化学气相沉积（HFCVD）技术合成的厚度为300μm，面积为2 X 2 cm〜2的独立CVD金刚石对来自〜（55）的5.9 keV X射线的响应铁源。线性Ⅰ-Ⅴ特征表明CVD金刚石具有良好的欧姆接触。该检测器还显示出良好的结果，例如暗电流为10〜（-8）A，光电流为10〜（-6）A，能量分辨率<0.4％和高信噪比。

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