A Path to Superconducting Nanowire Readout of Xe- based detectors

Xe 探测器的超导纳米线读数之路

• 批准号: ST/Y509929/1
• 负责人: James Dobson
• 金额: $ 64.18万
• 依托单位: King's College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FY509929%2F1
• 关键词: Path; Superconducting; Nanowire; Readout; Xe

With near-unity quantum efficiencies (QE), ultra-low dark count rates down to 10-4 Hz/device and exquisite sub-10-ps-timing resolution, Superconducting Nanowire Single Photon Detectors (SNSPDs) with vacuum-ultraviolet (VUV) sensitivity offer a potential step change as a new readout technology for a broad range of scintillator detectors used by the PPAN community (LXe, LHe, LAr) and have application in many non-PPAN areas, such as UV imaging techniques in the life sciences and as a low-noise readout for quantum technology. Most commercially available SNSPD devices target infrared wavelengths, and whilst some UV models are available they are not optimised for 178 nm VUV Xe light. This project brings together UK expertise in LXe*detectors with world-class capability in SNSPD design and fabrication, to deliver a proof-of-principle demonstration of a VUV-sensitive SNSPD device and to develop a range of novel applications across PPAN, quantum technology and the life sciences that are enabled by this new capability. Due to its inherent scalability, dark matter detectors based on the UK*pioneered LXe-technology have led the search for intermediate-mass dark matter for more than a decade. Alongside Xe target mass and stringent radiopurity requirements, the key driver for improved sensitivity for low*energy signals is the efficiency with which the 175 nm VUV scintillation light is detected. At these wavelengths, traditional readout devices such as VUV*sensitive photomultiplier tubes (PMTs) and Si-photomultipliers (SiPM) achieve 25-35% QE and as such readout with a > 90% QE SNSPD would be a significant improvement. The typical requirement of a triple-coincidence scintillation signal detected across multiple photosensors means this would result in an order of magnitude increase in signal efficiency for low mass dark matter and 8-Boron solar neutrinos. The key objectives of this project are to demonstrate the viability of a VUV*sensitive SNSPD device and to establish the feasibility and develop cases that leverage this new capability, including their use for readout of compact Xe*based particle detectors, VUV fluorescence spectroscopy, and ion-trap quantum computers. The project will follow a staged approach to characterise existing SNSPD detectors developed by Prof. Hadfield's group at the University of Glasgow: first, demonstrate the performance of the SNSPD to a VUV signal using double-coincident VIS (400 nm) events as a proxy; then the characterisation of VUV transmittance in solarisation-resistant optical fibres using VUV SiPM devices; which will enable coupling the SNSPD device, first to a monochromatic light source and then to a Xe scintillation cell for complete characterisation.

具有近量量子效率（QE），超低的黑暗计数率降至10-4 Hz/设备和精美的次数下午10-ps摄入式分辨率，超导向纳米线的单光子探测器（SNSPDS），用真空粉丝（VUV）敏感的范围内的ppanter sclint sclint sclint scright consector contection（snspds），可用于范围内，以提供范围内的范围，以提供新的读者，以示意范围内的范围内的范围scrtation， （LXE，LHE，LAR）并在许多非PPAN地区都有应用，例如生命科学中的紫外成像技术，也是量子技术的低噪声读数。大多数市售的SNSPD设备靶向红外波长，虽然有一些紫外线型号可用于178 nm vuv Xe Light。该项目汇集了具有SNSPD设计和制造能力的LXE*检测器中的英国专业知识，以提供对VUV敏感的SNSPD设备的原则证明，并开发PPAN，量子技术和生命科学的一系列新型应用程序，这些应用程序可通过这种新的能力来启用。由于其固有的可伸缩性，基于英国的暗物质检测器*开创性的LXE-Technology导致了十多年来寻找中间质量暗物质的搜索。除了XE目标质量和严格的放射线要求外，提高对低*能量信号灵敏度的关键驱动力是检测到175 nm VUV闪烁光的效率。在这些波长中，传统的读出设备，例如VUV*敏感的光电倍增管（PMTS）和Si-Photomultipliper（SIPM），QE达到25-35％，并且具有> 90％QE SNSPD的读数将是一个显着的改进。在多个光电传感器上检测到的三个相关闪烁信号的典型要求意味着这将导致低质量暗物质和8骨太阳中微子的信号效率的数量级提高。该项目的关键目的是证明VUV*敏感SNSPD设备的可行性，并建立可行性并开发利用这种新功能的案例，包括它们用于读取基于紧凑的Xe*基于XE*的粒子探测器，VUV荧光光谱镜头，以及离子-TRAP量子计算机。该项目将遵循一种分阶段的方法，以表征由格拉斯哥大学Hadfield小组开发的现有SNSPD探测器：首先，使用双重偶然的VIS（400 nm）事件证明SNSPD的性能为VUV信号；然后使用VUV SIPM设备在抗性光纤中进行VUV透射率的表征；这将启用SNSPD设备的耦合，首先与单色光源，然后再接合到XE闪烁电池以进行完整的表征。