A bending magnet strength of magnetic field of dipole magnets An array of four numbers giving X+, X-, Y+ and Y- half divergence Distance of source point from particle beam waist in X (horizontal) direction. Distance of source point from particle beam waist in Y (vertical) direction. Accepted photon beam divergence in X+ (horizontal outboard) direction. Note that divergence_x_plus+divergence_x_minus is the total horizontal beam divergence. Accepted photon beam divergence in X- (horizontal inboard) direction. Note that divergence_x_plus+divergence_x_minus is the total horizontal beam divergence. Accepted photon beam divergence in Y+ (vertical upward) direction. Note that divergence_y_plus+divergence_y_minus is the total vertical beam divergence. Accepted photon beam divergence in Y- (vertical downward) direction. Note that divergence_y_plus+divergence_y_minus is the total vertical beam divergence. bending magnet spectrum "Engineering" position of bending magnet