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Gas electron multiplier (GEM) is widely used in modern gas detectors of ionizing radiation in experiments on high-energy physics at accelerators and in other fields of science. Typically the GEM devices are based on a dielectric foil with…

仪器与探测器 · 物理学 2016-06-21 S. Franchino , M. Negodaev , A. Bolshakov , E. Ashkinazi , Y. Kalkan , A. Popovich , M. Komlenok , V. Sosnovtsev , V. Ralchenko

The ARAPUCA is a novel concept for liquid argon scintillation light detection which has been proposed for the photon detection system of the Deep Underground Neutrino Experiment. The test in liquid argon of one of the first ARAPUCA…

Active galactic nuclei (AGNs) have been proposed as plausible sites for hosting a sizable fraction of the binary black hole (BBH) mergers measured through gravitational waves (GWs) by the LIGO-Virgo-Kagra (LVK) experiment. These GWs could…

高能天体物理现象 · 物理学 2023-11-20 J. C. Rodríguez-Ramírez , C. R. Bom , B. Fraga , R. Nemmen

The Large Electron Multipliers (LEMs) are key components of double phase liquid argon TPCs. The drifting charges after being extracted from the liquid are amplified in the LEM positioned half a centimeter above the liquid in pure argon…

The Auger Muons and Infill for the Ground Array (AMIGA) aims to both extend the detection range of the Pierre Auger Observatory down to energies $\sim 10^{16.5}~\mathrm{eV}$ and to measure the muon content of extensive air showers. To…

仪器与探测器 · 物理学 2019-06-12 Alvaro Taboada

Scintillation light produced in liquid xenon (LXe) by alpha particles, electrons and gamma-rays was detected with a large area avalanche photodiode (LAAPD) immersed in the liquid. The alpha scintillation yield was measured as a function of…

仪器与探测器 · 物理学 2009-11-11 K. Ni , E. Aprile , D. Day , K. L. Giboni , J. A. M. Lopes , P. Majewski , M. Yamashita

We shortly describe recent progress in photon detectors combining bi-alkali photocathodes and cascaded patterned gas-avalanche electron multipliers. It permitted the development and the first feasibility demonstration of high-gain gaseous…

仪器与探测器 · 物理学 2009-07-23 A. Lyashenko , A. Breskin , R. Chechik , F. D. Amaro , J. Veloso , J. M. F. Dos Santos

We report electrical transport measurements on GaAs/AlGaAs based electron-hole bilayers. These systems are expected to make a transition from a pair of weakly coupled two-dimensional systems to a strongly coupled exciton system as the…

介观与纳米尺度物理 · 物理学 2009-11-13 J. A. Seamons , C. P. Morath , J. L. Reno , M. P. Lilly

We have operated a liquid-argon large-electron-multiplier time-projection chamber (LAr LEM-TPC) with a large active area of 76 $\times$ 40 cm$^2$ and a drift length of 60 cm. This setup represents the largest chamber ever achieved with this…

We model the response of a state of the art micro-hole single-stage charge amplication device (`microbulk' Micromegas) in a gaseous atmosphere consisting of Xenon/trimethylamine at various concentrations and pressures. The amplifying…

We calculate the absorption spectrum of cold three level Helium atoms in lambda configuration in an optical lattice.Our results show the possibilty of lasing at certain points on the optical lattice which are capable of rendering one of the…

统计力学 · 物理学 2016-08-31 Aranyabhuti Bhattacherjee

The midsize single-phase liquid argon prototype detector, operating at the surface laboratory, is designed to measure scintillation light emitted by the liquid argon (LAr). The detector employs 42 8-inch photomultiplier tubes (PMT) to…

仪器与探测器 · 物理学 2023-08-22 K. K. Zhao , M. Y. Guan , J. C. Liu , C. G. Yang , S. T. Lin

The study of heavily obscured supermassive black hole (SMBH) growth in late-stage galaxy mergers is challenging: column densities $N_{\mathrm{H}}>10^{24},\mathrm{cm}^{-2}$ can block most nuclear emission, leaving significant gaps in the…

The accretion disks of active galactic nuclei (AGN) are promising environments for producing binary black hole (BBH) mergers, which have been detected via gravitational waves (GW) with LIGO-Virgo-KAGRA (LVK). BBH mergers embedded in AGN…

Laser-induced electron diffraction is an evolving tabletop method, which aims to image ultrafast structural changes in gas-phase polyatomic molecules with sub-{\AA}ngstr\"om spatial and femtosecond temporal resolution. Here, we provide the…

Since the early eighties, we have shared with Leon Van Hove the following view. That if a QGP were produced in high energy heavy ion colliders, that its hadronization products would likely come from small localized in phase space bubbles of…

核理论 · 物理学 2008-11-26 S. J. Lindenbaum , R. S. Longacre , M. Kramer

A recent discovery of additional mechanism of electroluminescence (EL) in noble gases due to the neutral bremsstrahlung (NBrS) effect led to a prediction that NBrS EL should be present in noble liquids as well. A theoretical model of NBrS…

仪器与探测器 · 物理学 2023-12-15 A. Bondar , A. Buzulutskov , E. Frolov , E. Borisova , V. Nosov , V. Oleynikov , A. Sokolov

Liquid gas two phase flow is a common occurrence in various industrial applications. For nuclear fusion applications with a Li based breeder, existence of two phase flow may lead to critical issues including decreased tritium breeding…

Gas Electron Multiplier (GEM) is a cutting edge Micro Pattern Gaseous detector (MPGD) technology suitable as tracking device in high rate Heavy-Ion (HI) experiments for their good spatial resolution and most importantly high rate handling…

高能物理 - 实验 · 物理学 2025-05-07 S. Mandal , S. Gope , S. Das , S. Biswas

First observation of liquid xenon scintillation due to alpha-particles and gamma-rays with a large area avalanche photodiode immersed in the liquid is reported. An energy resolution of 10% (FWHM) and a coincidence time resolution of less…

仪器与探测器 · 物理学 2015-06-26 V. N. Solovov , A. Hitachi , V. Chepel , M. I. Lopes , R. Ferreira Marques , A. J. P. L. Policarpo