| Autor: |
Gueroult, Renaud, Rax, Jean-Marcel, Fisch, Nathaniel J. |
| Předmět: |
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| Zdroj: |
Physics of Plasmas; Dec2019, Vol. 26 Issue 12, p1-10, 10p, 3 Charts, 7 Graphs |
| Abstrakt: |
The electrostatic model proposed by Poulos [Phys. Plasmas 26, 022104 (2019)] to describe the electric potential distribution across and along a magnetized plasma column is used to shed light on the ability to control perpendicular electric fields. The effective electrical connection between facing end-electrodes is shown to be conditioned upon the smallness of a dimensionless parameter τ function of the plasma column aspect ratio and the square root of the conductivity ratio σ ⊥ / σ ∥ . The analysis of a selected set of past end-electrode biasing experiments confirms that this parameter is small in experiments that have successfully demonstrated perpendicular electric field tailoring. On the other hand, this parameter is O (1) in experiments that failed to demonstrate control, pointing to an excessively large ion-neutral collision frequency. A better understanding of the various contributions to σ ⊥ is needed to gain further insights into end-biasing experimental results. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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