The Effect of High Energy Protons and Neutrons on the Tensile Properties of Materials Selected for the Target and Blanket Components in the Accelerator Production of Tritium Project

2008 ◽  
pp. 644-644-16 ◽  
Author(s):  
SA Maloy ◽  
MR James ◽  
GJ Willcutt ◽  
WF Sommer ◽  
WR Johnson ◽  
...  
Keyword(s):  
Tensile Properties ◽  
High Energy ◽  
Protons And Neutrons ◽  
Properties Of Materials

Tensile properties of 9Cr–1Mo martensitic steel irradiated with high energy protons and neutrons

2003 ◽  
Vol 318 ◽  
pp. 215-227 ◽  
Author(s):  
J. Henry ◽  
X. Averty ◽  
Y. Dai ◽  
P. Lamagnère ◽  
J.P. Pizzanelli ◽  
...  
Keyword(s):  
Tensile Properties ◽  
Martensitic Steel ◽  
High Energy ◽  
Protons And Neutrons

Stars Initiated by High Energy Protons and Neutrons

1952 ◽  
Vol 86 (2) ◽  
pp. 167-170 ◽  
Author(s):  
Herbert Fishman ◽  
Alfred Morris Perry
Keyword(s):  
High Energy ◽  
Protons And Neutrons

Introduction

Catastrophe ◽  
2004 ◽  
Author(s):  
Richard A. Posner
Keyword(s):  
Forest Fires ◽  
High Energy ◽  
Particle Accelerator ◽  
High Energy Particle ◽  
Strange Matter ◽  
Strange Quarks ◽  
Tidal Waves ◽  
The Earth ◽  
Large Numbers ◽  
Protons And Neutrons

You wouldn’t see the asteroid, even though it was several miles in diameter, because it would be hurtling toward you at 15 to 25 miles a second. At that speed, the column of air between the asteroid and the earth’s surface would be compressed with such force that the column’s temperature would soar to several times that of the sun, incinerating everything in its path. When the asteroid struck, it would penetrate deep into the ground and explode, creating an enormous crater and ejecting burning rocks and dense clouds of soot into the atmosphere, wrapping the globe in a mantle of fiery debris that would raise surface temperatures by as much as 100 degrees Fahrenheit and shut down photosynthesis for years. The shock waves from the collision would have precipitated earthquakes and volcanic eruptions, gargantuan tidal waves, and huge forest fires. A quarter of the earth’s human population might be dead within 24 hours of the strike, and the rest soon after. But there might no longer be an earth for an asteroid to strike. In a high-energy particle accelerator, physicists bent on re-creating conditions at the birth of the universe collide the nuclei of heavy atoms, containing large numbers of protons and neutrons, at speeds near that of light, shattering these particles into their constituent quarks. Because some of these quarks, called strange quarks, are hyperdense, here is what might happen: A shower of strange quarks clumps, forming a tiny bit of strange matter that has a negative electric charge. Because of its charge, the strange matter attracts the nuclei in the vicinity (nuclei have a positive charge), fusing with them to form a larger mass of strange matter that expands exponentially. Within a fraction of a second the earth is compressed to a hyperdense sphere 100 meters in diameter, explodes in the manner of a supernova, and vanishes. By then, however, the earth might have been made uninhabitable for human beings and most other creatures by abrupt climate changes.

scholarly journals Diamonds on Diamond: structural studies at extreme conditions on the Diamond Light Source

2015 ◽  
Vol 373 (2036) ◽  
pp. 20130158 ◽  
Author(s):  
M. I. McMahon
Keyword(s):  
Atmospheric Pressure ◽  
Structural Information ◽  
Chemical Properties ◽  
High Energy ◽  
Extreme Conditions ◽  
Single Crystal Diffraction ◽  
Diamond Anvil ◽  
Properties Of Materials ◽  
Physical And Chemical ◽  
And Chemical Properties

Extreme conditions (EC) research investigates how the structures and physical and chemical properties of materials change when subjected to extremes of pressure and temperature. Pressures in excess of one million times atmospheric pressure can be achieved using a diamond anvil cell, and, in combination with high-energy, micro-focused radiation from a third-generation synchrotron such as Diamond, detailed structural information can be obtained using either powder or single-crystal diffraction techniques. Here, I summarize some of the research drivers behind international EC research, and then briefly describe the techniques by which high-quality diffraction data are obtained. I then highlight the breadth of EC research possible on Diamond by summarizing four examples from work conducted on the I15 and I19 beamlines, including a study which resulted in the first research paper from Diamond. Finally, I look to the future, and speculate as to the type of EC research might be conducted at Diamond over the next 10 years.

Effects of high energy electrons on physical and tensile properties of non-mulberry silk fibers

2013 ◽  
Vol 14 (6) ◽  
pp. 1032-1039
Author(s):  
Sangappa ◽  
B. Lakshmeesha Rao ◽  
S. Asha ◽  
S. Ganesh ◽  
R. Somashekar ◽  
...  
Keyword(s):  
Tensile Properties ◽  
High Energy ◽  
Silk Fibers ◽  
High Energy Electrons

ALNICO-II

Alloy Digest ◽  
1967 ◽  
Vol 16 (11) ◽  
Keyword(s):  
Magnetic Properties ◽  
Coercive Force ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Energy ◽  
General Purpose ◽  
Magnetic Alloy ◽  
Magnet Alloy ◽  
Permanent Magnet Alloy

Abstract ALNICO II is a general purpose permanent magnet alloy recommended for applications where better magnetic properties than Alnico I are desired. It is a high coercive force, high energy magnetic alloy. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating and machining. Filing Code: Fe-31. Producer or source: Allegheny Ludlum Corporation.

Thermoelectric properties of germanium telluride with fine-grained structure

2020 ◽  
Vol 11 ◽  
pp. 15-25
Author(s):  
L. D. Ivanova ◽  
◽  
Yu. V. Granatkina ◽  
I. Yu. Nikhezina ◽  
A. G. Malchev ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Melt Spinning ◽  
High Energy ◽  
Grain Structure ◽  
Thermoelectric Efficiency ◽  
Fine Grained ◽  
Germanium Telluride ◽  
Fine Grained Structure ◽  
Properties Of Materials ◽  
P Type

The microstructure and thermoelectric properties of materials based on germanium telluride p-type conductivity doped with copper and bismuth obtained by hot pressing of three types powders prepared by grinding an ingot to a size of hundreds microns (0.315  mm) to hundreds of nanometers (mechanical activation) in planetary high-energy mill and melt spinning were investigated. The microstructure of the samples were analyzed by optical and electron scanning microscopies. The nanoscale grain structure of these samples was established. The thermoelectric characteristics of the materials: Seebeck coefficient, electrical and thermal conductivities, were measured both at room temperature and in the temperature range of 100 – 800 K. The slopes of these dependencies are estimated. The coefficient of thermoelectric figure of merit is calculated. The higher thermoelectric efficiency (ZT = 1.5 at 600 K) was received for the samples hot-pressed from granules, prepared by melt spinning.

The Hard X-ray Photoemission Spectroscopy Facility at CLS: performance and first results

2015 ◽  
Vol 93 (1) ◽  
pp. 113-117 ◽  
Author(s):  
Qunfeng Xiao ◽  
Xiaoyu Cui ◽  
Yinbo Shi ◽  
Yongfeng Hu ◽  
Tsun-Kong Sham ◽  
...  
Keyword(s):  
High Energy ◽  
Photoemission Spectroscopy ◽  
Nondestructive Technique ◽  
Bulk Properties ◽  
X Ray ◽  
Probing Depth ◽  
First Results ◽  
Energy Version ◽  
Properties Of Materials ◽  
X Ray Absorption

Photoemission spectroscopy (PES) has been used widely to study the electronic structure of valence and core levels. However, conventional PES is surface-sensitive. To probe the interface and bulk properties of materials, hard X-ray photoemission spectroscopy (HXPES) has received increasing interest in the last decade, because of the deep probing ability of photoelectrons with higher kinetic energies (2–10 keV). Recently, a HXPES system was developed at the Canadian Light Source, using the high-energy version of a R4000 electron analyzer-based spectrometer connected to a medium-energy beamline, the soft X-ray microcharacterization beamline (SXRMB). Excellent performance of the beamline and the spectrometer is demonstrated herein using Au Fermi and 4f core lines; and the controlled probing depth of HXPES at SXRMB is demonstrated by tuning the photon energy (2–9 keV) in the study of a series of SiO2/SiC multilayer samples. Combined with the high-resolution X-ray absorption spectroscopy available at the SXRMB, the HXPES offers a powerful nondestructive technique for studying bulk properties of various materials.

Change of Superconducting Parameters of Y-Ba-Cu-O Slabs and Rings due to High-Energy Ion Beams

2006 ◽  
Vol 47 ◽  
pp. 63-68
Author(s):  
I. Kirschner ◽  
A. Balogh ◽  
Cs. Mészáros ◽  
R. Laiho ◽  
Gy. Kovács ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Magnetic Measurements ◽  
High Energy ◽  
External Irradiation ◽  
High Tc ◽  
Fitting Method ◽  
Properties Of Materials ◽  
Superconducting Parameters

Different high-Tc superconducting Y-Ba-Cu-O samples of slabs and rings have been investigated. Using differently prepared Y1Ba2Cu3O7-d materials, significant deviations between irradiated and unirradiated specimens have been detected in their properties. These investigations demonstrate that unlikely prepared superconductors are differently sensitive to the external irradiation, although they have the same composition. The irradiation applied during these experiments consisted of high-energy Bi-ions with the flux of 5x1010 ions/cm2 and with the energy of 720 MeV. As is experienced, a considerable variation of the magnetic moment in the extent of 19-44% and a significant increase of the critical current density up to 41% can be detected. These originate from the change of the properties of materials due to the irradiation. For the evaluation of the experiments a new fitting method is elaborated for the temperature dependence of the critical current density, providing fully correct results for the whole temperature interval. The A.C. magnetic measurements show, that the irradiation causes to reach the state of the perfect diamagnetism at higher temperatures, than in the case of unirradiated samples. Similarly, the irradiated specimens have much lower losses, than the unirradiated ones and even these smaller values disappear at low temperatures.

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