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Particle beams focused to micrometer-sized spots play a crucial role in forefront research using low-energy positrons. Their expedient and wide application, however, requires highly-resolved, fast beam diagnostics. We have developed two…

This paper discusses the potential for enhancing the capabilities of the European FEL in the soft X-ray regime. A high longitudinal coherence will be the key to such performance upgrade. In order to reach this goal we study a very compact…

加速器物理 · 物理学 2012-02-24 Gianluca Geloni , Vitaly Kocharyan , Evgeni Saldin

Transparent surfaces, such as glass, transmit most of the visible light that falls on them, making accurate pose estimation challenging. We propose a method to locate glass objects to millimetre accuracy using a simple Laser Range Finder…

机器人学 · 计算机科学 2019-03-08 Nicholas Adrian , Quang-Cuong Pham

Hard X / soft gamma-ray polarimetric analysis can be performed efficiently by the study of Compton scattering anisotropy in a detector composed of fine pixels. But in the energy range above 100 keV where sources flux are extremely weak and…

天体物理仪器与方法 · 物理学 2011-09-08 Nicolas M. Barrière , Lorenzo Natalucci , Pietro Ubertini

Building on recent work by Chandar et al. (2020), we construct X-ray luminosity functions (XLFs) for different classes of X-ray binary (XRB) donors in the nearby star-forming galaxy M83 through a novel methodology: rather than classifying…

高能天体物理现象 · 物理学 2021-05-12 Qiana Hunt , Elena Gallo , Rupali Chandar , Paula Johns Mulia , Angus Mok , Andrea Prestwich , Shengchen Liu

Sonography techniques use multiple transducer elements for tissue visualization. Signals detected at each element are sampled prior to digital beamforming. The required sampling rates are up to 4 times the Nyquist rate of the signal and…

信息论 · 计算机科学 2012-12-21 T. Chernyakova , Y. C. Eldar , R. Amit

X-ray diffraction was demonstrated from shock-compressed polycrystalline metal on nanosecond time scales. Laser ablation was used to induce shock waves in polycrystalline foils of Be, 25 to 125 microns thick. A second laser pulse was used…

其他凝聚态物理 · 物理学 2008-01-23 Damian C. Swift

Pixel detectors with cylindrical electrodes that penetrate the silicon substrate (so called 3D detectors) offer advantages over standard planar sensors in terms of radiation hardness, since the electrode distance is decoupled from the bulk…

The SwissFEL light-facility will provide coherent X-rays in the wavelength region 7-0.7 nm and 0.7-0.1 nm. In SwissFEL, view-screens and wire-scanners will be used to monitor the transverse profile of a 200/10pC electron beam with a…

For the last decade numerous researchers have been trying to develop experimental techniques to use X-ray Thomson scattering as a method to measure the temperature, electron density, and ionization state of high energy density plasmas such…

等离子体物理 · 物理学 2012-10-02 J. Nilsen , W. R. Johnson , K. T. Cheng

We have developed an improved method of time-resolved x-ray reflectivity (XRR) using monochromatic synchrotron radiation. Our method utilizes a polycapillary x-ray optic to create a range of incident angles and an area detector to collect…

材料科学 · 物理学 2019-03-27 Howie Joress , Shane Quinlan Arlington , Timothy P. Weihs , Joel D. Brock , Arthur Woll

An active device for radon detection in the air was developed. The monitor operates in pulse counting mode for real-time continuous measurements. The presented prototype has a relatively simple design made of low-price and easy to acquire…

仪器与探测器 · 物理学 2020-05-20 Soraia Elisio , Luis Peralta

The Beam Instrumentation group at CERN has developed a new scintillating fibre beam monitor for the measurement of secondary particle beams in the CERN Experimental Areas. The monitor has a simple design that stands out for its low material…

仪器与探测器 · 物理学 2019-10-29 I. Ortega , L. Fosse , J. Franchi , A. Frassier , J. Fullerton , J. Kral , J. Lauener , T. Schneider , G. Tranquille

X-ray Fluorescence Ghost Imaging (XRF-GI) was recently demonstrated for x-ray lab sources. It has the potential to reduce acquisition time and deposited dose by choosing their trade-off with spatial resolution, while alleviating the…

The Rapid Acquisition Atmospheric Detector (RAAD), onboard the LIGHT-1 3U CubeSat, detects photons between hard X-rays and soft gamma-rays, in order to identify and characterize Terrestrial Gamma Ray Flashes (TGFs). Three detector…

X-ray spectroscopy is one of the most powerful tools to access structure and properties of matter in different states of aggregation as it allows to trace atomic and molecular energy levels in course of various physical and chemical…

化学物理 · 物理学 2019-06-12 Sergey I. Bokarev , Oliver Kühn

Serial femtosecond X-ray crystallography (SFX) captures the structure and dynamics of biological macromolecules at high spatial and temporal resolutions. The ultrashort pulse produced by an X-ray free electron laser (XFEL) 'outruns' much of…

等离子体物理 · 物理学 2025-06-03 Spencer K. Passmore , Alaric L. Sanders , Andrew V. Martin , Harry M. Quiney

Synchrotron radiation facilities provide highly polarized X-ray beams across a wide energy range. However, the exact type and degree of polarization varies according to the beamline and experimental setup. To accurately determine the angle…

仪器与探测器 · 物理学 2024-05-31 L. Manzanillas , J. M. Ablett , M. Choukroun , F. J. Iguaz , J. P. Rueff

Feature point detection and description is the backbone for various computer vision applications, such as Structure-from-Motion, visual SLAM, and visual place recognition. While learning-based methods have surpassed traditional handcrafted…

计算机视觉与模式识别 · 计算机科学 2024-09-23 Ali Youssef , Francisco Vasconcelos

Transition Edge Sensor (TES) spectrometers for hard X-ray beamline science will enable improved X-ray emission and absorption spectroscopy in the information-rich 2 to 20 keV energy range. We are building a TES-based instrument for the…