coordinate_identifierΒΆ

Translation table for coordinate_identifier_definitions.

Name

Index

Description

unspecified

0

unspecified

x

1

First cartesian coordinate in the horizontal plane

y

2

Second cartesian coordinate in the horizontal plane (grad(x) x grad(y) = grad(z))

z

3

Vertical coordinate z

r

4

Major radius

phi

5

Toroidal angle

psi

10

Poloidal magnetic flux

rho_tor

11

The square root of the toroidal flux, sqrt((Phi-Phi_axis)/pi/B0), where Phi is the toroidal flux and B0 is the vacuum magnetic field

rho_tor_norm

12

The square root of the normalised toroidal flux, sqrt((Phi-Phi_axis)/(Phi_lcf-Phi_axis)), where Phi is the toroidal flux

rho_pol

13

The square root of the poloidal flux, sqrt(psi-psi_axis), where psi is the poloidal flux

rho_pol_norm

14

The square root of the normalised poloidal flux, sqrt((psi-psi_axis)/(psi_lcf-psi_axis)), where psi is the poloidal flux

theta

20

Geometrical poloidal angle around the magnetic axis

theta_straight

21

Straight field line poloidal angle

theta_equal_arc

22

Equal-arc poloidal angle; a differential of the angle is proportional to the length of the corresponding arc in the poloidal plane.

velocity

100

Total velocity; modulus of the velocity vector

velocity_x

101

Velocity component in the x-direction

velocity_y

102

Velocity component in the y-direction

velocity_z

103

Velocity component in the z-direction

velocity_phi

104

Velocity component in the toroidal direction

velocity_parallel

105

Velocity component parallel to the magnetic field

velocity_perpendicular

106

Velocity perpendicular to the magnetic field

velocity_thermal

107

Velocity normalised to the local thermal velocity of the thermal ions (of the relevant species)

velocity_radial

108

Velocity component in the radial direction

momentum

200

Modulus of the relativistic momentum vector

momentum_parallel

201

Component of the relativistic momentum vector parallel to the magnetic field

momentum_perpendicular

202

Component of the relativistic momentum vector perpendicular to the magnetic field

canonical_momentum_phi

203

Canonical toroidal angular momentum

energy_hamiltonian

300

Hamiltonian energy, including both kinetic and potential energy

energy_kinetic

301

Kinetic energy

magnetic_moment

302

magnetic moment

lambda

400

Ratio, magnetic moment over hamiltonian energy

pitch_angle

402

Angle between the magnetic field and the velocity vector

pitch

403

Ratio, parallel velocity over total velocity

pitch_at_min_b

404

Pitch, ratio of parallel over perp. velocity, at the minimum value of the magnetic field strength along the guiding centre orbit

n_phi

500

Toroidal mode number, the wave vector toroidal component being defined as k_tor = n_tor grad phi where phi is the toroidal angle so that a positive n_tor means a wave propagating in the positive phi direction