4.5 Article

Ion heating and energy balance during magnetic reconnection events in the RFX-mod experiment

期刊

NUCLEAR FUSION
卷 62, 期 2, 页码 -

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IOP Publishing Ltd
DOI: 10.1088/1741-4326/ac39f2

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RFP; magnetic reconnection; ion heating; helical states; energy balance

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This paper investigates the collapse of electron temperature during reconnection events in high current reversed field pinch plasmas using high time resolution soft-x-ray diagnostics. The energy released during these events, similar to astrophysical plasmas, may be involved in ion heating. The authors further point out that these issues will be studied in RFX-mod2.
Reconnection events in high current reversed field pinch plasmas are often associated to the partial or total loss of the helical magnetic topology. The electron temperature collapse during these phenomena is investigated in RFX-mod thanks to high time resolution soft-x-ray diagnostics; these data are used, together with magnetic energy reconstructions, for energy balance analysis. The paper shows that the energy released during reconnection events, similarly to astrophysical plasmas, might be involved in ion heating, the latter being estimated by the energy distribution function of neutral atoms, a rather interesting feature in a reactorial perspective. These issues will be further investigated in RFX-mod2 , an upgrade of the present device starting its operations from 2022, where the modified boundary conditions are expected to increase the helical states duration and reduce the frequency of reconnection events.

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