Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impact of plasma shaping on tokamak microstability   We have used the local-$\delta{f}$ gyrokinetic code GS2 to perform studies of
the effect of flux-surface shaping on two highly-shaped, low- and high-$\beta$
JT-60SA-relevant equilibria, including a successful benchmark with the GKV
code. We find a novel destabilization of electrostatic fluctuations with
increased elongation for plasma with a strongly peaked pressure profile. We
explain the results as a competition between the local magnetic shear and
finite-Larmor-radius (FLR) stabilization. Electromagnetic studies indicate that
kinetic ballooning modes are stabilized by increased shaping due to an
increased sensitivity to FLR effects, relative to the ion-temperature-gradient
instability. Nevertheless, at high enough $\beta$, increased elongation
degrades the local magnetic shear stabilization that enables access to the
region of ballooning second-stability.

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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int