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Charge-to-mass-ratio-dependent ion heating during magnetic reconnection in the MST RFPa)
a)Paper BI2 2, Bull. Am. Phys. Soc. , 22 (2012).
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10.1063/1.4804958
/content/aip/journal/pop/20/5/10.1063/1.4804958
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/5/10.1063/1.4804958

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the MST magnetic geometry. Spectroscopic measurements reported in this paper are made at the edge of the plasma, viewing vertically at an impact parameter of r/a ∼0.92, predominantly parallel to the magnetic field lines.

Image of FIG. 2.
FIG. 2.

Measured time evolution of temperature (predominantly parallel to equilibrium magnetic field) during magnetic reconnection.

Image of FIG. 3.
FIG. 3.

Increase in temperature of various ion species versus their charge-to-mass ratio.

Image of FIG. 4.
FIG. 4.

Power spectra, at (solid line) and away from (dotted line) the reconnection event, of magnetic fluctuations ( ) measured using magnetic pickup coil at the edge of the plasma.

Image of FIG. 5.
FIG. 5.

(a) Normalized version of the main ion temperature evolution during reconnection event measured using Rutherford scattering diagnostic. (b) perpendicular heating term used in the model for ion. (c) Modeled time evolution of perpendicular (solid line) and parallel (dashed line) ion temperatures.

Image of FIG. 6.
FIG. 6.

Change in ion temperature in parallel (a) and perpendicular (b)directions for a perpendicular heating consistent with the ion cyclotron model.

Image of FIG. 7.
FIG. 7.

Change in ion temperature in parallel (a) and perpendicular (b)directions for a constant perpendicular heating of 3 eV/s for all ions.

Image of FIG. 8.
FIG. 8.

Variation of the angle (θ) between the magnetic field and the viewing chord.

Image of FIG. 9.
FIG. 9.

At a point along the chord, sight line makes an angle θ with .

Image of FIG. 10.
FIG. 10.

(a) Model predicted perpendicular (solid) and parallel (dotted) temperatures. (b) Chord averaged parallel (solid) and mixed (dotted) temperatures.

Tables

Generic image for table
Table I.

Impurity ion species, atomic transition wavelengths and their charge-to-mass ratio ( , where is the ionic charge and μ is the ratio of the ion mass to the proton mass.).

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2013-05-14
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Charge-to-mass-ratio-dependent ion heating during magnetic reconnection in the MST RFPa)
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/5/10.1063/1.4804958
10.1063/1.4804958
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