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Magnetohydrodynamic dynamo effect from electrostatic drift velocity field on sustainment of reversed field pinch plasmas in three-dimensional KTX equilibrium
- Source :
- Plasma Physics and Controlled Fusion. 64:065002
- Publication Year :
- 2022
- Publisher :
- IOP Publishing, 2022.
-
Abstract
- A dynamo is necessary for reversed field pinch (RFP) configuration sustainment in a continuous way or oscillation cycles by self-organization. A dynamo velocity field from electrostatic drift is studied in three-dimensional (3D) equilibrium for Keda Torus eXperiment RFP plasmas in quasi-multi-helical (QMH) and quasi-single-helical (QSH) states. The 3D equilibrium reconstruction is computed by VMEC code. It is found that the electrostatic potential provides helical modulation of plasma flow in QSH states. The electrostatic potential in QMH states is processed as a superposition of limited helical harmonics, and it shows an axisymmetric pattern. Non-axisymmetric components are negligible in QMH states because of flux surface averaging of the electrostatic field and corresponding electrostatic drift flow. The electrostatic drift velocity is comparable to the total plasma drift in QSH states; this implies that the electrostatic drift may play an important role in sustaining the helical configuration in RFP plasma.
- Subjects :
- Nuclear Energy and Engineering
Physics::Plasma Physics
Condensed Matter Physics
Subjects
Details
- ISSN :
- 13616587 and 07413335
- Volume :
- 64
- Database :
- OpenAIRE
- Journal :
- Plasma Physics and Controlled Fusion
- Accession number :
- edsair.doi...........8d42425ffce6e82c1d2f454047529897