Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Frequency Geodesic Acoustic Modes in Electron Scale Turbulence   In this work the finite $\beta$-effects of an electron branch of the geodesic
acoustic mode (el-GAM) driven by electron temperature gradient (ETG) modes is
presented. The work is based on a fluid description of the ETG mode retaining
non-adiabatic ions and the dispersion relation for el-GAMs driven non-linearly
by ETG modes is derived. The ETG growth rate from the fluid model is compared
to the results found from gyrokinetic simulations with good agreement. A new
saturation mechanism for ETG turbulence through the interaction with el-GAMs is
found, resulting in a significantly enhanced ETG turbulence saturation level
compared to the mixing length estimate. It is shown that the el-GAM may be
stabilized by an increase in finite $\beta$ as well as by increasing
non-adiabaticity. The decreased GAM growth rates is due to the inclusion of the
Maxwell stress.

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The categories of this paper are: stat
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The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
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The categories of this paper are: eess
29
The categories of this paper are: funct-an