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Preliminary Study of Uncertainty-Driven Plasma Diffusion
| Title: | Preliminary Study of Uncertainty-Driven Plasma Diffusion |
| Authors: | Oikawa, Shun-ichi Browse this author →KAKEN DB | | Oiwa, Tsuyoshi Browse this author | | Shimazaki, Takahiro Browse this author |
| Keywords: | magnetic length | | uncertainty principle | | quantum mechanical diffusion | | anomalous diffusion | | neoclassical theory |
| Issue Date: | 2010 |
| Publisher: | Japan Society of Plasma Science and Nuclear Fusion Research |
| Journal Title: | Plasma and Fusion Research |
| Volume: | 5 |
| Issue: | S1050 |
| Start Page: | S1050-1 |
| End Page: | S1050-4 |
| Publisher DOI: | 10.1585/pfr.5.S1050 |
| Abstract: | Quantum mechanical plasma diffusion is studied using a semi-classical model with two different characteristic lengths; one is the average interparticle separation, and the other is the magnetic length. The diffusion coefficients D derived in this study show a dependence on several plasma parameters, such as temperature T, mass m, density n, and magnetic field B, similar to that observed experimentally. The numerical values of the diffusion coefficient D in this study are as large as that for neoclassical diffusion. We have pointed out in this study that (i) for distant encounters in typical fusion plasmas of T = 10 keV and n = 1020 m−3, the average potential energy U ∼ 30meV is as small as the uncertainty in energy ΔE ∼ 40meV, and (ii) for a magnetic field B = 3 T, the spatial size of the wavefunction in the plane perpendicular to the magnetic field is as large as B ∼ 1.4 × 10−8 m, which is much larger than the typical electron wavelength λe ∼ 10−11 m. |
| Relation: | http://www.jspf.or.jp/PFR/index.html |
| Type: | article |
| URI: | http://hdl.handle.net/2115/48805 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 及川 俊一
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