| タイトル | Ion confinement and transport in a toroidal plasma with externally imposed radial electric fields |
| 本文（外部サイト） | http://hdl.handle.net/2060/19790011696 |
| 著者（英） | Hong, H. Y.; Kim, Y. C.; Krawczonek, W. M.; Powers, E. J.; Roth, J. R. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1979-03-01 |
| 言語 | eng |
| 内容記述 | Strong electric fields were imposed along the minor radius of the toroidal plasma by biasing it with electrodes maintained at kilovolt potentials. Coherent, low-frequency disturbances characteristic of various magnetohydrodynamic instabilities were absent in the high-density, well-confined regime. High, direct-current radial electric fields with magnitudes up to 135 volts per centimeter penetrated inward to at least one-half the plasma radius. When the electric field pointed radially toward, the ion transport was inward against a strong local density gradient; and the plasma density and confinement time were significantly enhanced. The radial transport along the electric field appeared to be consistent with fluctuation-induced transport. With negative electrode polarity the particle confinement was consistent with a balance of two processes: a radial infusion of ions, in those sectors of the plasma not containing electrodes, that resulted from the radially inward fields; and ion losses to the electrodes, each of the which acted as a sink and drew ions out of the plasma. A simple model of particle confinement was proposed in which the particle confinement time is proportional to the plasma volume. The scaling predicted by this model was consistent with experimental measurements. |
| NASA分類 | PLASMA PHYSICS |
| レポートNO | 79N19867
NASA-TP-1411
E-9754 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/176135 |
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