CIX - A Detector for Spectral Enhanced X-ray Imaging by Simultaneous Counting and Integrating

Maximum-likelihood reconstruction of photon returns from simultaneous analog and photon-counting lidar measurements

We present a novel method for combining the analog and photon-counting measurements of lidar transient recorders into reconstructed photon returns. The method takes into account the statistical properties of the two measurement modes and estimates the most likely number of arriving photons and the most likely values of acquisition parameters describing the two measurement modes. It extends and improves the standard combining ("gluing") methods and does not rely on any ad hoc definitions of the overlap region nor on any ackground subtraction methods.

Multiple hits in wire chambers and other particle detectors

We propose an analysis of the dead time losses in counting imaging detectors such as MWPC which can resolve $k$ simultaneous hits, and analyze in more detail an $X-Y$ detector which has a third wire set which allows for the recognition of simultaneous impacts.

Optimal parameters estimation for K-edge subtraction imaging using PixiRad-2/PixieIII photon counting detector on a conventional laboratory X-ray micro-tomograph

Photon Counting Detectors (PCDs) open new opportunities in X-ray imaging. Pixie III is a PCD using simultaneously two energy thresholds. This enables to acquire images using two distinct energy bins in a single exposure and allows to perform K-Edge Subtraction (KES) imaging with laboratory sources. In that context, one has however to deal with an energy bin optimization: narrow energy bins lead to high KES signal at the expense of higher noise, while wider energy bins lead to poor KES signal but better statistics. This work presents a model that aims at finding the optimal energy thresholds an…

近紫外光子计数双光梳光谱学

Near-ultraviolet photon-counting dual-comb spectroscopy

本研究提出一种光子计数双光梳光谱方法，将双光梳技术优势拓展至紫外波段，实现量子极限信噪比与飞瓦级梳齿功率下的碱金属蒸气光谱测量，为短波长精密光谱及光子级诊断应用开辟新路径。