Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Development and testing of an unstructured mesh method for whole plasma
  gyrokinetic simulations in realistic tokamak geometry   In this work, we have formulated and implemented a mixed unstructured
mesh-based finite element (FE)-Fourier decomposition scheme for gyrokinetic
simulations in realistic tokamak geometry. An efficient particle positioning
(particle-triangle mapping) scheme for the charge deposition and field
scattering using an intermediate grid as the search index for triangles has
been implemented and a significant speed-up by a factor of $\sim30$ is observed
as compared with the brute force scheme for a medium-size simulation. The
TRIMEG (TRIangular MEsh based Gyrokinetic) code has been developed. As an
application, the ion temperature gradient (ITG) mode is simulated using the
simplified gyrokinetic Vlasov-Poisson model. Our simulation and that using the
ORB5 code for the DIII-D Cyclone case show reasonable agreement. As an
additional application, ITG simulations using an ASDEX Upgrade equilibrium have
been performed with density and temperature gradient profiles similar to the
Cyclone case. Capabilities of the TRIMEG code for simulations with realistic
experimental equilibria in the plasma core and in the whole plasma volume with
open field lines are demonstrated.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci