hkl_to_k_omega_both#

anri.fwd.hkl_to_k_omega_both(ubi, hkl, wavelength, k_in_lab, ky, kz, wedge, chi)[source]#

Forward-project (h,k,l) into k-vectors and omega angles for both Friedel solutions.

Parameters:

ubi (Array) – [3,3] (U.B)^(-1) matrix of the grain/voxel
hkl (Array) – [3] (h,k,l) reciprocal space vector
wavelength (float) – Wavelength in angstroms
k_in_lab (Array) – [3] Direction of the incoming beam before divergence, lab frame (any length, not vertical)
ky (float) – Horizontal beam divergence: small tilt of the beam (radians) along the horizontal across it, see anri.geom.beam_basis(). Usually zero.
kz (float) – Vertical beam divergence: small tilt of the beam (radians) along the vertical across it, see anri.geom.beam_basis(). Usually zero.
wedge (float) – Wedge motor value (degrees)
chi (float) – Chi motor value (degrees)

Returns:

k_in_lab (jax.Array) – [3] k-in vector in laboratory frame (incoming beam) - not scaled or normalised!
k_out_lab (jax.Array) – [2,3] k_out vectors in laboratory frame, index 0 for etasign = +1
omega (jax.Array) – [2] Omega angles in degrees, index 0 for etasign = +1
valid (jax.Array) – Boolean indicating if a valid solution exists, shared by both branches

Notes

Q in the sample frame, the beam normalisation and the sample-frame beam vector are all properties of the geometry rather than of the branch, as is everything anri.diffract.omega_solns_core() computes. Producing both solutions together evaluates that shared part once. Only the omega rotation of Q and the resulting k_out differ per branch.