Gyrokinetic linear instabilities and quasilinear fluxes for variations of ITER tokamak baseline parameters

Linear instability and quasilinear fluxes calculated with the GENE plasma microturbulence code. The input parameters correspond to variations of ITER baseline scenario parameters calculated by integrated modelling using the QuaLiKiz transport model, as described in P. Mantica et al (2019) Plasma Physics and Controlled Fusion 62 014021. 

The quasilinear fluxes were calculated with a bespoke saturation rule calibrated to dedicated GENE nonlinear simulations carried out in the same ITER regime. The quasilinear flux dataset was fit with a neural network (NN) regression model, which was then used for ITER baseline integrated modelling and performance projections. Alongside the linear stability dataset, the two separate quasilinear datasets correspond to an unfiltered dataset, and a filtered and data-augmented dataset used for the NN regression. For full details, please see reference [J. Citrin et al (2023) submitted to Physics of Plasmas]. 

The dimensionless input and output variables correspond to the IMAS gyrokinetic IDS standards. The major radius was taken as the reference length. A key and further details are found below.

Description of CSV file columns

rhoN
Normalized toroidal flux coordinate

ky
Binormal wavenumber, normalized to the reference (ion scale) gyroradius

omt_DT
Normalized logarithmic main ion temperature gradient (\(R/L_{Ti}\))

omt_el
Normalized logarithmic electron temperature gradient (\(R/L_{Te}\))

omn_el
Normalized logarithmic electron density gradient (\(R/L_{ne}\))

s
Magnetic shear

q
Safety factor (q-profile)

gamma
Instability growth rate (gyroBohm normalisation with IMAS standard)

omega
Instability frequency (gyroBohm normalisation). Positive frequencies correspond to the ion diamagnetic direction

kperp2
Square of perpendicular wavenumber weighted over poloidal mode structure \(\langle{k_\perp^2}\rangle\)

Q_DT
ky-dependent ion heat flux, normalized by the square of the electrostatic potential

Q_el
ky-dependent electron heat flux, normalized by the square of the electrostatic potential

G_el
ky-dependent electron particle flux, normalized by the square of the electrostatic potential

QDT
Quasilinear ion heat flux, following summation of modes and a saturation rule

Qe
Quasilinear electron heat flux, following summation of modes and a saturation rule

Ge
Quasilinear electron particle flux, following summation of modes and a saturation rule

QDT_ITG
Quasilinear ion heat flux, when considering ITG modes only. GyroBohm normalized with IMAS convention

Qe_ITG
Quasilinear electron heat flux, when considering ITG modes only. GyroBohm normalized with IMAS convention

Ge_ITG
Quasilinear electron particle flux, when considering ITG modes only. GyroBohm normalized with IMAS convention

QDT_TEM
Quasilinear ion heat flux, when considering TEM modes only. GyroBohm normalized with IMAS convention

Qe_TEM
Quasilinear electron heat flux, when considering TEM modes only. GyroBohm normalized with IMAS convention

Ge_TEM
Quasilinear electron particle flux, when considering TEM modes only. GyroBohm normalized with IMAS convention