Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of magnetic perturbations on the 3D MHD self-organization of
  shaped tokamak plasmas   The effect of magnetic perturbations (MPs) on the helical self-organization
of shaped tokamak plasmas is discussed in the framework of the nonlinear 3D MHD
model. Numerical simulations performed in toroidal geometry with the
\textsc{pixie3d} code [L. Chac\'on, Phys. Plasmas {\bf 15}, 056103 (2008)] show
that $n=1$ MPs significantly affect the spontaneous quasi-periodic sawtoothing
activity of such plasmas. In particular, the mitigation of sawtooth
oscillations is induced by $m/n=1/1$ and $2/1$ MPs. These numerical findings
provide a confirmation of previous circular tokamak simulations, and are in
agreement with tokamak experiments in the RFX-mod and DIII-D devices. Sawtooth
mitigation via MPs has also been observed in reversed-field pinch simulations
and experiments. The effect of MPs on the stochastization of the edge magnetic
field is also discussed.

37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
2
The categories of this paper are: math
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph