Improvement in the practical implementation of neutron source strength calibration using prompt gamma rays.
In this study, the neutron emission rate from neutron sources using prompt gamma rays in hydrogen was determined, and several improvements were applied. Using Monte Carlo calculations, the best positions for the source, moderator and detector relative to each other were selected. For (241)Am-Be and (252)Cf sources, the sizes for polyethylene spheres with the highest efficiency were 12- and 10-inch, respectively. In addition, a new shielding cone was designed to account for scattered neutrons and gamma rays. The newly designed shielding cone, which is 45 cm in length, provided suitable attenuation for the source radiation.
This paper discusses some potential approaches to developing next-generation radar technologies via the development of ::: smart hardware subsystems that have the intrinsic capability to compensate for channel warping and propagation ::: distortions. Discussions with regard to typical categories of propagation distortions are provided along with a series of ::: sample scenarios that can provide challenging conditions for radar remote sensing applications. Observations of this set ::: of sample scenarios allows for the exploration of potential approaches to developing state-of-the art digital, RF, and ::: RF/Photonic technologies with intrinsic smart compensation capabilities that will enable the development of highresolution ::: radars that can operate at longer ranges while maintaining compact size and weight requirements.