current_drive.cpp File Reference

#include "current_drive.hpp"
#include "electric_field.hpp"
#include <mpi.h>

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Functions
double *	get_jpar0_loc ()
void	fourier_filter_m_range_cpp (double *field_inout)
KOKKOS_INLINE_FUNCTION double	parallel_spitzer_resistivity (double den, double te)
void	f_current_drive (const Simulation< DeviceType > &sml, const Grid< DeviceType > &grid, Plasma &plasma, const Moments &f0_moments, const DomainDecomposition< DeviceType > &pol_decomp, ElectricField< DeviceType > &electric_field, const MagneticField< DeviceType > &magnetic_field, LoopVolDiagnostics &loop_vol_diag)

Function Documentation

void f_current_drive	(	const Simulation< DeviceType > &	sml,
		const Grid< DeviceType > &	grid,
		Plasma &	plasma,
		const Moments &	f0_moments,
		const DomainDecomposition< DeviceType > &	pol_decomp,
		ElectricField< DeviceType > &	electric_field,
		const MagneticField< DeviceType > &	magnetic_field,
		LoopVolDiagnostics &	loop_vol_diag
	)

Drives electron current such that the plasma current required by the Grad-Shafranov equilibrium magnetic field is maintained. The plasma current is \(j_{\parallel,0} = \hat{\boldsymbol{b}}\cdot\left(\nabla\times\boldsymbol{B}_0\right)/\mu_0 \), or \(j_{\parallel,0} = \sum_s (q_s n_s u_{\parallel,s}) \). Therefore, \(u_{\parallel,e}=j_{\parallel,0}-\sum_{ions}(q_s n_s u_{\parallel,s}) \). The actual electron flow is stored in f0_moments.u_local). Any difference between the targeted and actual flow is damped away with an exponential damping \(\partial u/\partial t = \gamma (u_{target}-u_{actual}) \).

Parameters

[in]	sml	Simulation object (runtime parameters), class Simulation
[in]	grid	Grid object, class Grid
[in,out]	plasma	XGC plasma object; class plasma
[in]	f0_moments	Current low-order plasma moments, struct Moments
[in]	pol_decomp	Domain decomposition object (patch boundaries, etc.), class DomainDecomposition
[in]	loop_vol_diag	Diagnostic ouput object for the loop voltage, class LoopVolDiagnostics

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void fourier_filter_m_range_cpp

(

double *

field_inout

)

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double* get_jpar0_loc

(

)

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KOKKOS_INLINE_FUNCTION double parallel_spitzer_resistivity	(	double	den,
		double	te
	)

Evaluates the parallel Spitzer resistivity in \(\Omega m\) for given density and temperatures. Uses a simplified formula (NRL Formulary 2019, assuming \(T_e>10\) eV) because the logic to adjust V_loop is heuristic anyway.

Parameters

[in]	den	Plasma (electron) density in \(m^{-3}\), double
[in]	te	Electron temperature in eV, double

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