التفاصيل البيبلوغرافية
| العنوان: |
A research program to measure the lifetime of spin polarized fuel. |
| المؤلفون: |
Heidbrink, W. W., Baylor, L. R., Büscher, M., Engels, R. W., Garcia, A. V., Ghiozzi, A. G., Miller, G. W., Sandorfi, A. M., X. Wei, X. Zheng, Garcia, Jeronimo, Trevisanutto, Paolo Emilio |
| المصدر: |
Frontiers in Physics; 2024, p01-13, 13p |
| مصطلحات موضوعية: |
BLOCH equations, OPTICAL pumping, NUCLEAR reactions, NEUTRAL beams, LORENTZ force, ELECTROMAGNETIC spectrum, FUSION reactor divertors, TOKAMAKS |
| مستخلص: |
The use of spin polarized fuel could increase the deuterium-tritium (D-T) fusion cross section by a factor of 1.5 and, owing to alpha heating, increase the fusion power by an even larger factor. Issues associated with the use of polarized fuel in a reactor are identified. Theoretically, nuclei remain polarized in a hot fusion plasma. The similarity between the Lorentz force law and the Bloch equations suggests polarization can be preserved despite the rich electromagnetic spectrum present in a magnetic fusion device. The most important depolarization mechanisms can be tested in existing devices. The use of polarized deuterium and ³He in an experiment avoids the complexities of handling tritium, while encompassing the same nuclear reaction spin-physics, making it a useful proxy to study issues associated with full D-T implementation. ³He fuel with 65% polarization can be prepared by permeating optically-pumped ³He into a shell pellet. Dynamically polarized 7Li-D pellets can achieve 70% vector polarization for the deuterium. Cryogenically-frozen pellets can be injected into fusion facilities by special injectors that minimize depolarizing field gradients. Alternatively, polarized nuclei could be injected as a neutral beam. Once injected, the lifetime of the polarized fuel is monitored through measurements of escaping charged fusion products. Multiple experimental scenarios to measure the polarization lifetime in the DIII-D tokamak and other magnetic-confinement facilities are discussed, followed by outstanding issues that warrant further study. [ABSTRACT FROM AUTHOR] |
|
Copyright of Frontiers in Physics is the property of Frontiers Media S.A. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder