Image charge detection of ion bunches using a segmented, cryogenic detector
Image charge detection of ion bunches using a segmented, cryogenic detector
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DOI：
10.1063/5.0096094
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发表时间：
2022-05-28
影响因子：
3.2
通讯作者：
Spemann, D.
中科院分区：
文献类型：
--
作者：
Raecke, P.;Meijer, J.;Spemann, D.
研究了专用成像电荷探测器对单通道小束离子的响应。该探测器是在我们的实验室设计和建造的，旨在实现最大的信噪比(SNR)，目的是在未来实现确定性离子注入的单离子检测，这是基于固态的量子技术的关键技术。结果表明，采用适当的分段信号通道组合的检测器是如何显著提高信噪比的。此外，探测器被低温冷却到163K，进一步提高了信噪比。该探测器样机在信噪比=2时的探测灵敏度为80个基元电荷，探测4keV Xe+离子束团。在此信噪比下，误报错误率预计为0.1%。将测量的灵敏度与在SNR=2时产生22个基元电荷的理论估计进行比较，所给出的结果为进一步优化探测器组件和信号分析技术提供了途径，这是实现单离子探测所必需的。由AIP出版公司独家授权出版。
The response of a dedicated image charge detector to a single passage of small ion bunches was studied. This detector was designed and built in our labs aiming for a maximized signal-to-noise ratio (SNR) with the motivation to enable single ion detection for deterministic ion implantation, a key technique for solid state based quantum technologies, in the future. It is shown how segmentation of the detector with the appropriate combination of the individual segment signal channels significantly increases the SNR. Additionally, the detector is cryogenically cooled to temperatures down to 163 K, further enhancing the SNR. The detection sensitivity of this detector prototype was measured to be 80 elementary charges for SNR = 2, detecting 4 keV Xe+ ion bunches. At this SNR, the false-positive error rate is expected to be 0.1%. Comparing the measured sensitivity with a theoretical estimation yielding 22 elementary charges for SNR = 2, the presented results lead the way to further optimizations of the detector components and the signal analysis techniques, necessary to realize single ion detection. Published under an exclusive license by AIP Publishing.