Applying sub-nanosecond Timing Detectors Beyond Particle Physics

该项目将专注于新开发的TiemPix4.2混合像素探测器读出ASIC的测量，并将其用于基于低增益雪崩二极管的传感器。TIMEPEPX4+LGAD配对将产生一个时间分辨率为200 ps的成像探测器，具有低光级别光学灵敏度，并可访问柔软的X射线区域(1-5keV)。最初的工作将集中于Timepx4专用集成电路的特性，特别是第一年将以测量X射线和100keV尺度电子的探测量子效率(DQE)和分辨率平均传递函数(MTF)为目标，以及开发所需的相关校准技术。这将包括AllPix2模拟电子与传感器的相互作用，然后尝试提高分辨率利用的时间和能量分辨率的能力的Timepx4的关键能力之一是高时间分辨率优于200ps，要实现这一精度在实践中需要非常好的了解和校准的内部效应的Timepx4 ASIC。为了研究这一点，将使用PS精确激光扫描像素矩阵来探测粘合在Timepx4上的光学敏感硅传感器。然后，该项目将专注于开发基于Timepx4的传感器在以下相关领域的应用，该应用基于与有兴趣使用Timepx4的合作伙伴的校准。牛津化学系-建立在以前的飞行时间质谱仪(TOFMS)的基础上，成像工作，寻找使用带有微通道板式电子放大器的裸露Timepx4 ASIC的可能性，或使用基于LGAD的传感器直接对离子进行成像。牛津材料部(OM)-利用Timepx4读取电子显微镜，牛津考古部-Timepx4的大面积和低噪声能力，潜在地耦合到高z或厚的硅传感器，将主要通过利用探测器的宇宙背景抑制能力，允许对蜘蛛样品进行非常低速率、高精度的伽马射线剂量测定。特别是，初始的X射线成像和电子显微镜应用对我们的工业合作伙伴量子探测器有限公司非常感兴趣，该公司在CASE项目的两个方面之间提供了高度的重叠。

The project will focus on measurements of the newly developed Tiempix4.2 Hybrid Pixel Detector readout ASIC, and develop towards its use with a Low Gain Avalanche Diode based sensor. The Timepix4+LGAD pairing will produce an imaging detector with 200 ps time resolution, low light level optical sensitivity and access to the tender X-ray regime (1-5keV). Initial work will focus on the characterisation of the Timepix4 ASIC, and in particular the first year will target measurements of the Detective Quantum Efficiency (DQE) and resolution Mean Transfer Function (MTF) with both x-rays and 100keV scale electrons, as well as the development of required related calibration techniques. This will include an Allpix2 simulation of the electron interaction with the sensor, and then attempt to improve the resolving power by making use of the timing and energy resolving capabilities of the Timepix4.One of the key capabilities of the Timepix4 is the high timing resolution of better than 200ps, to achieve this this precision in practise requires a very good understanding and calibration of the Internal effects on the Timepix4 ASIC. To investigate this an optically sensitive silicon sensor bonded to a Timepix4 will be probed using a ps accurate laser scanned across the pixel matrix.The project will then focus on developing the application of Timepix4 based sensor in the following related areas based on calibrations with partners interested in making use of the Timepix4.Oxford Chemistry Department - Building on previous Time-of-Flight Mass Spectrometry (ToFMS), imaging work, looking at the possibility of using bare Timepix4 ASICS with a microchannel plate electron amplifier, or direct imaging of ions with an LGAD based sensor.Oxford Materials Dept (OM) - Making use of the Timepix4 to read out an electron microscope, with a particular emphasis on the improved bandwidth of the Timepix4 and increasing the spatial resolution by measuring the properties of the sensor charge deposition pattern for each incident electron.Oxford Archaeology Department - The large area and low noise capabilities of the Timepix4, potentially coupled to high z or thick silicon sensors will allow very low rate, precision gamma ray dosimetry of arachnological samples, primarily by making use of the cosmic background rejection capabilities of the detector.In particular, the initial x-ray imaging and electron microscopy applications have significant interest for our CASE industrial partner Quantum Detectors Ltd, which provides a high level of overlap between the two aspects of the CASE project.