نتایج جستجو برای: neutron radiography
تعداد نتایج: 65281 فیلتر نتایج به سال:
A new pulsed neutron source is under construction at the Indiana University Cyclotron Facility (IUCF). Neutrons are produced via (p,n) reactions by a low-energy proton beam incident on a thin beryllium target. The source is tightly coupled to a cold methane moderator held at a temperature of 20 K or below. The resulting time-averaged cold neutron flux is expected to be comparable to that of the...
We develop a mathematical model to find the optimal inspection strategy for detecting a nuclear weapon (or nuclear material to make a weapon) from being smuggled into the United States in a shipping container, subject to constraints of port congestion and an overall budget. We consider an 11-layer security system consisting of shipper certification, container seals, and a targeting software sys...
In order to detect the presence of defects in the composite structure of helicopter rotor blades, combined neutronand X-ray radiography investigations were performed at the Budapest Research Reactor. The rotor blades were about 10 m (or 6,5 m) long, and therefore the images were taken in several segments, and a special program was developed to reconstruct the entire radiographic image from the ...
The Los Alamos Neutron Science Center (LANSCE) operates two spallation neutron sources dedicated to research in materials science, condensed-matter physics, and fundamental and applied nuclear physics. Prior to 1995, all thermal neutron radiography at Los Alamos was done on a beam port attached to the Omega West reactor, a small 8MW research reactor used primarily for radioisotope production an...
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