def __init__(
self,
plasma,
particle_type="p",
n_particles=1,
scaling=1,
dt=np.inf * u.s,
nt=np.inf,
integrator="explicit_boris",
):
if np.isinf(dt) and np.isinf(nt): # coverage: ignore
raise ValueError("Both dt and nt are infinite.")
self.q = atomic.integer_charge(particle_type) * constants.e.si
self.m = atomic.particle_mass(particle_type)
self.N = int(n_particles)
self.scaling = scaling
self.eff_q = self.q * scaling
self.eff_m = self.m * scaling
self.plasma = plasma
self.dt = dt
self.NT = int(nt)
self.t = np.arange(nt) * dt
self.x = np.zeros((n_particles, 3), dtype=float) * u.m
self.v = np.zeros((n_particles, 3), dtype=float) * (u.m / u.s)
self.name = particle_type
self.position_history = np.zeros(
(self.NT, *self.x.shape), dtype=float) * u.m
self.velocity_history = np.zeros(
(self.NT, *self.v.shape), dtype=float) * (u.m / u.s)
# create intermediate array of dimension (nx,ny,nz,3) in order to allow
# interpolation on non-equal spatial domain dimensions
_B = np.moveaxis(self.plasma.magnetic_field.si.value, 0, -1)
_E = np.moveaxis(self.plasma.electric_field.si.value, 0, -1)
self.integrator = self._all_integrators[integrator]
self._B_interpolator = interp.RegularGridInterpolator(
(self.plasma.x.si.value, self.plasma.y.si.value,
self.plasma.z.si.value),
_B,
method="linear",
bounds_error=True,
)
self._E_interpolator = interp.RegularGridInterpolator(
(self.plasma.x.si.value, self.plasma.y.si.value,
self.plasma.z.si.value),
_E,
method="linear",
bounds_error=True,
)
def setup_class(self):
"""set up some initial values for tests"""
self.T_e = 1000 * u.eV
self.n_e = 2e13 / u.cm**3
self.ion = "D +1"
self.m_i = particle_mass(self.ion)
self.Z = integer_charge(self.ion)
self.T_i = self.T_e
self.n_i = self.n_e / self.Z
self.B = 0.01 * u.T
self.coulomb_log_val_ei = 17
self.coulomb_log_val_ii = 17
self.hall_e = None
self.hall_i = None
self.V_ei = None
self.V_ii = None
self.mu = m_e / self.m_i
self.theta = self.T_e / self.T_i
self.model = "Braginskii"
self.field_orientation = "all"
with pytest.warns(RelativityWarning):
self.ct = ClassicalTransport(
T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
Z=self.Z,
B=self.B,
model=self.model,
field_orientation=self.field_orientation,
coulomb_log_ei=self.coulomb_log_val_ei,
coulomb_log_ii=self.coulomb_log_val_ii,
V_ei=self.V_ei,
V_ii=self.V_ii,
hall_e=self.hall_e,
hall_i=self.hall_i,
mu=self.mu,
theta=self.theta,
)
self.ct_wrapper = ClassicalTransport(
T_e=self.T_e,
n_e=self.n_e,
T_i=self.T_i,
n_i=self.n_i,
ion=self.ion,
Z=self.Z,
B=self.B,
model=self.model,
field_orientation=self.field_orientation,
mu=self.mu,
theta=self.theta,
)
self.all_variables = self.ct.all_variables
def test_integer_charge():
with pytest.warns(PlasmaPyFutureWarning):
assert integer_charge("Fe 20+") == 20
