Measurement of the secondary electron emission from CVD diamond films using phosphor screen detectors
Measurement of the secondary electron emission from CVD diamond films using phosphor screen detectors
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使用荧光屏检测器测量 CVD 金刚石薄膜的二次电子发射
DOI：
10.1088/1748-0221/10/03/p03004
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发表时间：
2015
影响因子：
1.3
通讯作者：
Vaz R
中科院分区：
文献类型：
--
作者：
Vaz R
基于金刚石的光电倍增管具有提供对现有装置的显著改进的潜力，这是由于金刚石的高二次电子产率和二次电子的窄能量分布，这提高了能量分辨率，从而产生极快的响应时间。在本文中，我们描述了一个实验装置，旨在研究二次电子发射的金刚石膜只有400纳米厚，观察到的反射和透射配置。该装置包括一个系统的校准P22绿色荧光屏作为辐射转换器，与光电倍增管结合使用，以获取二次发射产量数据的金刚石样品。与传统的法拉第杯检测相比，荧光屏设置的上级信号电压采样允许将样品上的二次电子产额的变化可视化，从而获得空间分布。初步的反射和透射产额数据作为一个功能的初级电子能量为选定的CVD金刚石薄膜和膜。还使用法拉第杯检测器装置从相同的样品组获得反射数据。一般而言，两种测量设置的二次电子产率与一次能量的曲线是相当的。与法拉第杯相比，在我们的装置上记录到平均低15-20%的信号，这归因于当在亚千伏偏压下操作时P22磷光体屏幕的较低的光致发光效率。
Diamond-based photomultipliers have the potential to provide a significant improvement over existing devices due to diamond's high secondary electron yield and narrow energy distribution of secondary electrons which improves energy resolution creating extremely fast response times. In this paper we describe an experimental apparatus designed to study secondary electron emission from diamond membranes only 400 nm thick, observed in reflection and transmission configurations. The setup consists of a system of calibrated P22 green phosphor screens acting as radiation converters which are used in combination with photomultiplier tubes to acquire secondary emission yield data from the diamond samples. The superior signal voltage sampling of the phosphor screen setup compared with traditional Faraday Cup detection allows the variation in the secondary electron yield across the sample to be visualised, allowing spatial distributions to be obtained. Preliminary reflection and transmission yield data are presented as a function of primary electron energy for selected CVD diamond films and membranes. Reflection data were also obtained from the same sample set using a Faraday Cup detector setup. In general, the curves for secondary electron yield versus primary energy for both measurement setups were comparable. On average a 15–20% lower signal was recorded on our setup compared to the Faraday Cup, which was attributed to the lower photoluminescent efficiency of the P22 phosphor screens when operated at sub-kilovolt bias voltages.
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影响因子：
1.3
作者：
Lapington J
通讯作者：
Lapington J
DOI：
10.1088/0022-3727/20/9/008
发表时间：
1987-09
期刊：
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影响因子：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
D. M. Trucchi;E. Cappelli;N. Lisi;P. Ascarelli
通讯作者：
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