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Vertically stacked heterojunctions have garnered significant attention for their tunable electronic structures and photocatalytic performance, making them promising candidates for next-generation nanodevices. Using first-principles…

材料科学 · 物理学 2025-07-18 Liuzhu Yang , Wenhui Wan , Zhicui Wang , Qiuyue Ma , Yanfeng Ge , Yong Liu

Some applications in scientific imaging, like space-based high-precision photometry, benefit from a detailed characterization of the sensitivity variation within a pixel. A detailed map of the intra-pixel sensitivity (IPS) allows to…

天体物理仪器与方法 · 物理学 2018-05-07 Swaraj Bandhu Mahato , Joris De Ridder , Guy Meynants , Gert Raskin , Hans Van Winckel

We have developed a new technique for weak lensing analysis, with which the effect of the point spread function (PSF) on small galaxy images can be corrected for accurately. Rather than relying on weighted second moments of detected images,…

天体物理学 · 物理学 2016-08-30 Konrad Kuijken

The Large Hadron Collider (LHC) at CERN will undergo an upgrade in order to increase its luminosity to $7.5 \times 10^{34}$ cm$^{-2}$s$^{-1}$. The increased luminosity during this High-Luminosity running phase (HL-LHC), starting around…

仪器与探测器 · 物理学 2023-09-04 The Tracker Group of the CMS Collaboration

The present Compact Muon Solenoid silicon pixel tracking system has been designed for a peak luminosity of 1034cm-2s-1 and total dose corresponding to two years of the Large Hadron Collider (LHC) operation. With the steady increase of the…

仪器与探测器 · 物理学 2011-10-11 N. Parashar

Skipper Charge-Coupled Devices (Skipper-CCDs) are ultra-low-threshold detectors capable of detecting energy deposits in silicon at the eV scale. Increasingly used in rare-event searches, one of the major challenges in these experiments is…

(Pre-)transitional disks show gaps and cavities that can be related with on-going planet formation. According to theory, young embedded planets can accrete material from the circumplanetary and circumstellar disks, so that they could be…

Space missions designed for high precision photometric monitoring of stars often under-sample the point-spread function, with much of the light landing within a single pixel. Missions like MOST, Kepler, BRITE, and TESS, do this to avoid…

天体物理仪器与方法 · 物理学 2019-09-27 Dmitry Vorobiev , Alexis Irwin , Zoran Ninkov , Kevan Donlon , Douglas Caldwell , Stefan Mochnacki

The manufacturing of light-emitting diodes is a complex semiconductor-manufacturing process, interspersed with different measurements. Among the employed measurements, photoluminescence imaging has several advantages, namely being a…

计算机视觉与模式识别 · 计算机科学 2020-03-03 Maike Lorena Stern , Hans Lindberg , Klaus Meyer-Wegener

Pixel detectors are used in the innermost part of the multi purpose experiments at LHC and are therefore exposed to the highest fluences of ionising radiation, which in this part of the detectors consists mainly of charged pions. The…

仪器与探测器 · 物理学 2010-11-30 T. Rohe , A. Bean , W. Erdmann , H. -C. Kaestli , S. Khalatyan , B. Meier , V. Radicci , J. Sibille

The Advanced Camera for Surveys (ACS) enables low resolution slitless spectroscopic imaging in the three channels. The most-used modes are grism imaging with the WFC and the HRC at a resolution of 40 and 24 A/pixel, respectively. In the far…

天体物理学 · 物理学 2007-05-23 M. Kuemmel , S. S. Larsen , J. R. Walsh

Single-photon avalanche diodes (SPADs) are an emerging technology with a unique capability of capturing individual photons with high timing precision. SPADs are being used in several active imaging systems (e.g., fluorescence lifetime…

图像与视频处理 · 电气工程与系统科学 2019-04-25 Atul Ingle , Andreas Velten , Mohit Gupta

We report on a large active area (15x15mm2), high channel density (470 pixels/mm2), self-triggering CMOS analog chip that we have developed as pixelized charge collecting electrode of a Micropattern Gas Detector. This device, which…

Conventional LIDAR systems require hundreds or thousands of photon detections to form accurate depth and reflectivity images. Recent photon-efficient computational imaging methods are remarkably effective with only 1.0 to 3.0 detected…

应用统计 · 统计学 2019-11-13 Joshua Rapp , Vivek K Goyal

Charge density waves (CDWs) are symmetry-broken ground states that commonly occur in low-dimensional metals due to strong electron-electron and/or electron-phonon coupling. The non-equilibrium carrier distribution established via…

材料科学 · 物理学 2019-07-24 M. Chávez-Cervantes , G. E. Topp , S. Aeschlimann , R. Krause , S. A. Sato , M. A. Sentef , I. Gierz

Micro-channel-plate-based photo-detectors are unique in being capable of covering areas of many square-meters while providing sub-millimeter space resolution, time resolutions of less than 10 picoseconds for charged particles, time…

仪器与探测器 · 物理学 2020-10-28 Jinseo Park , Fangjian Wu , Evan Angelico , Henry J. Frisch , Eric Spieglan

In recent years, scientific Complementary Metal Oxide Semiconductor (sCMOS) devices have been increasingly applied in X-ray detection, thanks to their attributes such as high frame rate, low dark current, high radiation tolerance and low…

仪器与探测器 · 物理学 2022-12-14 Yu Hsiao , Zhixing Ling , Chen Zhang , Wenxin Wang , Quan Zhou , Xinyang Wang , Shuang-Nan Zhang , Weimin Yuan

From 2002 to 2025, the Hubble Space Telescope's Advanced Camera for Surveys has suffered in the harsh radiation environment above the protection of the Earth's atmosphere. We track the degradation of its image quality, as Solar protons and…

The pixel detectors for the High Luminosity upgrades of the ATLAS and CMS detectors will preserve digitized charge information in spite of extremely high hit rates. Both circuit physical size and output bandwidth will limit the number of…

We present a statistical color constancy method that relies on novel gray pixel detection and mean shift clustering. The method, called Mean Shifted Grey Pixel -- MSGP, is based on the observation: true-gray pixels are aligned towards one…

计算机视觉与模式识别 · 计算机科学 2019-01-10 Yanlin Qian , Said Pertuz , Jarno Nikkanen , Joni-Kristian Kämäräinen , Jiri Matas