TRANSP uses the following convention for the azimuthal and poloidal injection angle of EC waves, for a given cyclindrical system (R,Z,phi).
- specifies the vertical or poloidal angle of rays relative to the positive Z axis.
THETECH=0.0→ the rays are pointing vertically straight up (regardless of the value of
THETECH=90.0→ the rays are pointing on the horizontal plane, direction within that plane is set by
THETECH=180.0→ the rays are pointing vertically straight down (regardless of
- PHAIECH specifies the toroidal aiming angle. If
THETECHis not 0 or 180 degrees, the ray has a horizontal component and
PHAIECHcontrols the direction of this component.
PHAIECH=0→ the horizontal component points in the +R direction, away from the machine axis of symmetry.
PHAIECH=180→ the horizontal component points in the -R direction, towards the machine axis of symmetry.
PHAIECH=90→ the horizontal component is in the ф direction.
PHAIECH=-90 (270)→ the horizontal component is in the -ф direction.
NOTE: since the current is driven by electrons, for a given right-handed system an aiming angle along the ф correspond to a current along the -ф direction. Make sure that you check the direction of the plasma current and magnetic toroidal field.