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Sensitive gas tube near-UV photon-counting detector based on excited-state photoionization

机译：基于激发态光电离的敏感气管近紫外光子计数检测器

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摘要

Abstract: Photoionization of excited states is the mechanism of detection in gas tube UV photon counting detectors of high sensitivity and variable spectral response. Because of bias to the prebreakdown region, noise current is on the order of only 10$+$MIN@14$/ A$DOT@Hz$+$MIN$HLF$/. Spectral response varies according to gas quantum structure and pressure. High gas pressures shift spectral response to shorter wavelengths while lower pressures shift it to longer wavelengths and broaden it. One detector version is therefore almost solar blind. Another exhibits almost flat spectral response over most of the near UV band. In all cases, response falls off strongly with increasing wavelengths at longer UV wavelengths. Picowatt UV radiant powers yield about 1000 counts per minute. Response gamma is fairly constant up towards the microwatt radiant power range before falling off. !25
机译：摘要：激发态的光电离是高灵敏度，可变光谱响应的气管紫外光子计数检测器的检测机理。由于对预击穿区域的偏见，噪声电流仅为10 $ + $ MIN @ 14 $ / A $ DOT @ Hz $ + $ MIN $ HLF $ /。光谱响应根据气体量子结构和压力而变化。较高的气压将光谱响应移至较短的波长，而较低的气压将其移至较长的波长并使其变宽。因此，一种检测器版本几乎是日盲的。另一个在大部分近紫外波段上表现出几乎平坦的光谱响应。在所有情况下，在更长的紫外线波长下，响应都随着波长的增加而强烈下降。皮瓦紫外线辐射功率每分钟可产生约1000个计数。在下降之前，响应伽玛在微瓦辐射功率范围内相当恒定。 ！25

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