Abstract
Temperatures of singly and doubly charged krypton ions, along with electron temperature, were determined as functions of time in current sheets formed in the 2D and 3D magnetic configurations with an X-line. It is established that maximum temperature of krypton ions exceeds maximum electron temperature by more than an order of magnitude, and these temperatures exhibit different dependence on time and magnitude of the longitudinal magnetic field. Fast superthermal plasma jets directed along the largest of transverse dimensions of the current sheet, the sheet width, from the sheet center toward its periphery are discovered. It is demonstrated that Ampère’s forces are responsible for tangential acceleration of krypton plasma. Measured values of energy of accelerated krypton ions agree with estimates of the Ampère’s forces obtained on the basis of independent magnetic measurements.
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ACKNOWLEDGMENTS
The authors are grateful to A.G. Frank for useful discussions and to E.V. Voronova for her help in processing experimental data.
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Kyrie, N.P., Savinov, S.A. Spectroscopic Investigation of Tangential Acceleration and Heating of Plasma of Current Sheets Formed under the Krypton Discharge. Plasma Phys. Rep. 47, 611–622 (2021). https://doi.org/10.1134/S1063780X21060106
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DOI: https://doi.org/10.1134/S1063780X21060106