This paper analyzes the relationship between the Single Helical relaxed states studied by R. Paccagnella [Phys. Plasmas 23, 092512 (2016)] and the so-called "helical ohmic equilibria," i.e., plasma states that are solutions of the helical Grad Shafranov equation and that satisfy the constraint imposed by the Ohm law. The existence of marginally stable helical equilibria is clearly demonstrated, while the ohmic constraint is not exactly satisfied within the proposed first order perturbation theory. The model predictions are however satisfactorily compared with experimental trends.

From single helical relaxed states to helical equilibria

Paccagnella Roberto
2018

Abstract

This paper analyzes the relationship between the Single Helical relaxed states studied by R. Paccagnella [Phys. Plasmas 23, 092512 (2016)] and the so-called "helical ohmic equilibria," i.e., plasma states that are solutions of the helical Grad Shafranov equation and that satisfy the constraint imposed by the Ohm law. The existence of marginally stable helical equilibria is clearly demonstrated, while the ohmic constraint is not exactly satisfied within the proposed first order perturbation theory. The model predictions are however satisfactorily compared with experimental trends.
2018
Istituto gas ionizzati - IGI - Sede Padova
Condensed matter physics
Plasmas
First order perturbation theory
Grad-Shafranov equations
Helical equilibria
Model prediction
Ohm law
Plasma state
Relaxed state
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/376147
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