scholarly journals (U) Endpoint Energy and Scintillator Geometry Effects on the Swank Factor, Quantum Efficiency, and DQE(0) for High-Energy Radiography

2020 ◽  
Author(s):  
Jennifer Disterhaupt ◽  
Michael James ◽  
Marc Klasky
Keyword(s):  
Quantum Efficiency ◽  
High Energy ◽  
Endpoint Energy ◽  
Geometry Effects

Quantum Efficiency Measurements of Windowless Electron Multipliers to Heavy High Energy Particles

1975 ◽  
Vol 22 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Z. H. Cho ◽  
M. Singh ◽  
A. Mohabbatizadeh ◽  
O. H. Sackerlotzky ◽  
L. Amore
Keyword(s):  
Quantum Efficiency ◽  
High Energy ◽  
High Energy Particles

5. Instruments of light

2016 ◽  
pp. 47-62
Author(s):  
Geoff Cottrell
Keyword(s):  
Physical Properties ◽  
Quantum Efficiency ◽  
Diffraction Grating ◽  
High Energy ◽  
Electromagnetic Spectrum ◽  
Eye Detection ◽  
High Energy Proton ◽  
Energy Proton ◽  
Charge Coupled Devices ◽  
Different Parts

In the eye, detection is done by the retina. In telescopes operating in different parts of the electromagnetic spectrum, light interacts with matter in different ways, and so a variety of detectors is used. ‘Instruments of light’ describes how, first, photographic, and then electronic light detectors have greatly increased the sensitivity of telescopes, and made it possible to record the state of the sky, as well as obtain information on the physical properties of stars and galaxies. It describes photometry, the quantum efficiency of light detectors, charge-coupled devices, and high-energy proton detectors, and explains the processes of diffraction grating and spectroscopy. Telescopes and their detectors are now inseparable.

scholarly journals (U) Segmented Scintillator Pitch, Thickness, and Septa Material Effects on the Swank Factor, Quantum Efficiency, and DQE(0) for High-Energy X-Ray Radiography

2021 ◽  
Author(s):  
Jennifer Disterhaupt ◽  
Michael James ◽  
Marc Klasky
Keyword(s):  
Quantum Efficiency ◽  
High Energy ◽  
X Ray

High Energy and Quantum Efficiency in Photoinduced Charge Separation

2007 ◽  
Vol 129 (2) ◽  
pp. 313-320 ◽  
Author(s):  
John M. Weber ◽  
Matthew T. Rawls ◽  
Valerie J. MacKenzie ◽  
Bradford R. Limoges ◽  
C. Michael Elliott
Keyword(s):  
Quantum Efficiency ◽  
Charge Separation ◽  
High Energy ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Monte Carlo simulation for detector quantum efficiency in high-energy gamma camera

2013 ◽  
Vol 25 (10) ◽  
pp. 2734-2738
Author(s):  
许海波 Xu Haibo ◽  
郑娜 Zheng Na ◽  
陈朝斌 Chen Chaobin
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Quantum Efficiency ◽  
Gamma Camera ◽  
High Energy ◽  
High Energy Gamma ◽  
Energy Gamma

Summary of the R&D of 20-inch MCP-PMTs for neutrino detection

2021 ◽  
Vol 16 (11) ◽  
pp. C11003
Author(s):  
Q. Wu ◽  
S. Qian ◽  
Y. Cao ◽  
G. Huang ◽  
M. Jin ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Mass Production ◽  
High Energy Physics ◽  
Liquid Scintillator ◽  
High Energy ◽  
Test System ◽  
Night Vision ◽  
Mass Hierarchy ◽  
Large Area ◽  
Neutrino Mass Hierarchy

Abstract The Jiangmen Underground Neutrino Observatory (JUNO) in China aiming to determine the neutrino mass hierarchy is under construction. A new kind of large area microchannel-plate photomultiplier tube (MCP-PMT) was put forward for the JUNO by the researchers in Institute of High Energy Physics (IHEP) in China. After breaking through several core technotical barriers, the 20-inch MCP-PMT prototype with great performance was successfully produced by the MCP-PMT group in China and got 75% PMT orders (15,000 pics) from JUNO. The mass production line and batch test system was completed in North Night Vision Technology Co., Ltd. (NNVT). The performance of the MCP-PMT including the gain, the quantum efficiency, the P/V ratio, the dark count rate and the transit time spread can be batch tested. During the mass production process, the technical progress in the cathode deposition method improved the quantum efficiency of the photocathode from 30% to 35%. The aging behaviour, temperature effect, the after-pulse distribution and the flash signal of the 20-inch MCP-PMT are all detailly studied. By August of 2020, the 15,000 MCP-PMTs, which will be installed as the central liquid scintillator detector of JUNO, have been completed and delivered to Jiangmen. The average QE at 400 nm for the 15,000 pieces of MCP-PMTs is 32%.

The E-ring: interactions with plasma and implications for its evolution

1984 ◽  
Vol 75 ◽  
pp. 599-602
Author(s):  
T.V. Johnson ◽  
G.E. Morfill ◽  
E. Grun
Keyword(s):  
Time Scale ◽  
Particle Density ◽  
High Energy ◽  
Particle Removal ◽  
Density Region ◽  
Drag Forces ◽  
Orbit Evolution ◽  
History Of ◽  
Ring Particle ◽  
Ring Material

A number of lines of evidence suggest that the particles making up the E-ring are small, on the order of a few microns or less in size (Terrile and Tokunaga, 1980, BAAS; Pang et al., 1982 Saturn meeting; Tucson, AZ). This suggests that a variety of electromagnetic and plasma affects may be important in considering the history of such particles. We have shown (Morfill et al., 1982, J. Geophys. Res., in press) that plasma drags forces from the corotating plasma will rapidly evolve E-ring particle orbits to increasing distance from Saturn until a point is reached where radiation drag forces acting to decrease orbital radius balance this outward acceleration. This occurs at approximately Rhea's orbit, although the exact value is subject to many uncertainties. The time scale for plasma drag to move particles from Enceladus' orbit to the outer E-ring is ~104yr. A variety of effects also act to remove particles, primarily sputtering by both high energy charged particles (Cheng et al., 1982, J. Geophys. Res., in press) and corotating plasma (Morfill et al., 1982). The time scale for sputtering away one micron particles is also short, 102 - 10 yrs. Thus the detailed particle density profile in the E-ring is set by a competition between orbit evolution and particle removal. The high density region near Enceladus' orbit may result from the sputtering yeild of corotating ions being less than unity at this radius (e.g. Eviatar et al., 1982, Saturn meeting). In any case, an active source of E-ring material is required if the feature is not very ephemeral - Enceladus itself, with its geologically recent surface, appears still to be the best candidate for the ultimate source of E-ring material.

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