Use of Optical Spectra to Measure Large Electric Fields in a Hot-Ion Plasma
- 1 December 1970
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 41 (13), 5327-5329
- https://doi.org/10.1063/1.1658671
Abstract
Intense electric fields found in the beam‐plasma interface of Burnout V give rise to satellite spectra of the helium 23P‐43D, 3F triplet (4471 Å), and the 21P‐41D, 1F singlet (4922 Å) emission lines. Electric‐field strengths increasing from near zero on the magnetic axis to about 7 kV cm−1 at 1 cm, and then decreasing to less than 2 kV cm−1 at 2‐cm radial distance are found. An Abel inversion giving intensity of the satellite lines as a function of plasma radius together with displacement and intensity of π and σ components in the Zeeman structure of the satellites gives the electric‐field strength and implies that the direction of the electric field is perpendicular to the magnetic axis.Keywords
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