Development Of A High Count Rate Neutron Detector With Position Sensitivity And High Efficiency
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Release | : 2006 |
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Download Development of a High-count-rate Neutron Detector with Position Sensitivity and High Efficiency Book in PDF, Epub and Kindle
While the neutron scattering community is bombarded with hints of new technologies that may deliver detectors with high-count-rate capability, high efficiency, gamma-ray insensitivity, and high resolution across large areas, only the time-tested, gas-filled [sup 3]He and scintillation detectors are in widespread use. Future spallation sources with higher fluxes simply must exploit some of the advanced detector schemes that are as yet unproved as production systems. Technologies indicating promise as neutron detectors include pixel arrays of amorphous silicon, silicon microstrips, microstrips with gas, and new scintillation materials. This project sought to study the competing neutron detector technologies and determine which or what combination will lead to a production detector system well suited for use at a high-intensity neutron scattering source.
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Total Pages | : 7 |
Release | : 1994 |
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Download High Precision Thermal Neutron Detectors Book in PDF, Epub and Kindle
Two-dimensional position sensitive detectors are indispensable in neutron diffraction experiments for determination of molecular and crystal structures in biology, solid-state physics and polymer chemistry. Some performance characteristics of these detectors are elementary and obvious, such as the position resolution, number of resolution elements, neutron detection efficiency, counting rate and sensitivity to gamma-ray background. High performance detectors are distinguished by more subtle characteristics such as the stability of the response (efficiency) versus position, stability of the recorded neutron positions, dynamic range, blooming or halo effects. While relatively few of them are needed around the world, these high performance devices are sophisticated and fairly complex; their development requires very specialized efforts. In this context, we describe here a program of detector development, based on 3He filled proportional chambers, which has been underway for some years at Brookhaven. Fundamental approaches and practical considerations are outlined that have resulted in a series of high performance detectors with the best known position resolution, position stability, uniformity of reliability over time of this type.
Author | : Yacouba Diawara |
Publisher | : Springer Nature |
Total Pages | : 257 |
Release | : 2023-08-04 |
Genre | : Science |
ISBN | : 3031365461 |
Download Neutron Detectors for Scattering Applications Book in PDF, Epub and Kindle
This book covers the most common neutron detectors used in neutron scattering facilities and all of those in use at Oak Ridge National Lab. It starts describing the facilities, instruments and the critical detector parameters needed by various instruments. Then the key components of the 3He-based linear position-sensitive detectors as well as on their electronics, which require particular attention to signal processing and noise reduction, are introduced. One chapter is dedicated to the 3He alternatives where scintillators play a critical role. It also covers emerging neutron detection technologies including semiconductors, vacuum-based devices and their associated readouts, which will be required in the future for high rate and high-resolution neutron detectors. The authors explain the logic behind the choice of materials as well as the various constraints that neutron detectors must respect to be useful. Some of these constraints, such as efficiency and gamma-ray sensitivity are common to all neutron counters while others, like timing resolution, dynamic range, and peak counting rate, depend on the applications. The book guides experts, the nuclear science community, and young scholars through the physical processes and the required electronics in a way that is accessible for those not professionally involved in designing detector’s components and electronic circuits.
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Release | : 1982 |
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Download Spatial Resolution of Neutron-position Scintillation Detectors Book in PDF, Epub and Kindle
An Intense Pulsed Neutron Source (IPNS) was recently built at Argonne. From the point of view of neutron detection a pulsed source has two characteristics which are basically different from those of a steady-state source such as a reactor: broad spectrum of neutron energies in which a greater fraction of the flux is in the epithermal range, and high instantaneous neutron flux. A detector to be used with a pulsed source should therefore have: high neutron detection efficiency extending to epithermal energies, and high instantaneous count-rate capability. In response to these requirements a new neutron position-sensitive detector was developed. The detector is comprised of an array of photomultiplier tubes coupled to a thin 6Li-glass scintillator. The principle of operation is similar to that of the Anger gamma-ray camera used in nuclear medicine.
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Total Pages | : 938 |
Release | : 1976-03 |
Genre | : Nuclear energy |
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Download Nuclear Science Abstracts Book in PDF, Epub and Kindle
Author | : Ward Diethorn |
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Total Pages | : 158 |
Release | : 1956 |
Genre | : Carbon |
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Download A Methane Proportional Counter System for Natural Radiocarbon Measurements Book in PDF, Epub and Kindle
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Release | : 1982 |
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Download Recent Developments in Position-sensitive Neutron Counting Book in PDF, Epub and Kindle
Continuing research on advanced methods of thermal neutron detection and position sensing with gas-filled counters was aimed at improving their performance and extending the limits of their applicability. High electron drift velocities obtained from measurements on gas mixtures containing CF4 motivated us to evaluate the properties of 3He-CF4 and Ar-CF4 mixtures to show that these gases have the potential of improving the count rate capability, spatial resolution, and photon discrimination of neutron PSPCs (position-sensitive proportional counters) and fission counters. In support of the U.S. National Small-Angle Neutron Scattering (SANS) Facility we developed a large-area (65-cm x 65-cm) PSPC camera. RC position encoding was chosen for simplicity of construction, but since previous experience with this encoding method had been limited to smaller PSPCs (area
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Total Pages | : 972 |
Release | : 1988 |
Genre | : Power resources |
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Download Energy Research Abstracts Book in PDF, Epub and Kindle
Author | : United States. Congress. House. Committee on Science. Subcommittee on Energy and Environment |
Publisher | : |
Total Pages | : 1348 |
Release | : 1996 |
Genre | : Political Science |
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Download The Department of Energy's FY 1997 Budget Request for the Office of Energy Research (OER) Book in PDF, Epub and Kindle
Author | : M.E. Fitzpatrick |
Publisher | : CRC Press |
Total Pages | : 368 |
Release | : 2003-02-06 |
Genre | : Science |
ISBN | : 0203608992 |
Download Analysis of Residual Stress by Diffraction using Neutron and Synchrotron Radiation Book in PDF, Epub and Kindle
While residual stress can be a problem in many industries and lead to early failure of component, it can also be introduced deliberately to improve lifetimes. Knowledge of the residual stress state in a component can be critical for quality control of surface engineering processes or vital to performing an accurate assessment of component life unde