Module particles 

Reduced particle tracker overlay for hybrid MHD/PIC-style current feedback.

This module introduces a deterministic charged-particle pusher using the Boris integrator and a simple toroidal current deposition path on the Grad-Shafranov grid.

Structs

ChargedParticle

Charged macro-particle state.

CoulombCollisionParams

Parameters describing the background plasma for Coulomb collisions.

ParticlePopulationSummary

Functions

advance_particles_boris

Advance a particle set for a fixed number of Boris steps.

apply_coulomb_collisions

Apply Coulomb collisions to all particles in a batch.

blend_particle_current

Blend fluid and particle current maps and renormalize integral to i_target.

boris_push_step

Advance one particle state using the Boris push.

collision_frequencies

Collision frequencies (ν_slow, ν_defl, ν_energy) for a test particle at given speed.

collision_step

Apply Coulomb collision Monte Carlo kick to a single particle.

coulomb_logarithm

Coulomb logarithm via NRL formula, clamped to [5, 30].

critical_velocity

Critical velocity where electron drag equals ion drag [m/s].

deposit_toroidal_current_density

Deposit particle toroidal current density J_phi on the GS R-Z grid.

estimate_alpha_heating_profile

Estimate alpha-particle heating power density [W/m^3] on the R-Z grid.

seed_alpha_test_particles

Create deterministic alpha test particles for hybrid kinetic-fluid overlays.

spitzer_slowing_down_time

Spitzer slowing-down time [s] for a test particle on field electrons.

summarize_particle_population

Summarize kinetic state of a particle population.