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| MOOBC01 |
Electron Accelerator Options for Photo-Detection of Fissile Materials
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137 |
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- K. C.D. Chan, A. J. Jason, P. J. Turchi
LANL, Los Alamos, New Mexico
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Funding: Work supported by DNDO of US Government
For national security, it is important to detect the presence of Special Nuclear Materials (SNM), especially Highly-Enriched Uranium (HEU). Generally used methods for such detection include interrogation by photons and neutrons. For example, photofission in HEU can be initiated with 14-MeV photons. The resulting delayed neutrons and photons from the fission fragments are clear signatures of the presence of HEU. One can generate high-energy photons using electron accelerators via various mechanisms. In this paper, we will describe two of them, namely electron bremsstrahlung and Compton-backscattered photons. We focus on these two mechanisms because they cover a wide range of accelerator requirements. Electron bremsstrahlung can be generated using a compact low-energy electron linac while the generation of Compton-backscattered photons requires a high-energy electron accelerator of a few hundred MeV. We review these two options, describe their accelerator requirements, and compare their relative merits.
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Slides
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| THPMS017 |
Design of Muon Accelerators for an Advanced Muon Facility
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3032 |
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- H. M. Miyadera, A. J. Jason
LANL, Los Alamos, New Mexico
- K. Nagamine
UCR, Riverside, California
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Muon beams are produced at Muon Facilities all over the world. They are commonly used in condensed matter physics with mSR (Muon Spin Rotation / Relaxation / Resonance) spectroscopy. Up to today, the applications of mSR are limited by the large sizes of the muon beams (typically 10 cm2). We carried out design works of an Advanced Muon Facility at LANSCE that produces a 'muonμbeam'. The muonμbeam improves beam brightness by three orders of magnitude from that at conventional Muon Facilities and would revolutionize not only material research using mSR spectroscopy but also numerous applications in nano-technology, high-pressure science and bioscience. The designed facility mainly consists of a large acceptance muon channel 'LA Omega' followed by novel muon linear accelerators. This equipment is capable of producing the world?s most intense muon beam of ~109 muon/s at LANSCE. The intense muon beam of LA Omega will be cooled and accelerated with the muon linear accelerators to produce a 50-keV and a separate 10-MeV muonμbeam. The unique time structure of the muon beam produced by the LANSCE linear accelerator optimally matches the muon accelerator.
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