Diffractometer Geometries

Tables are provided for the different geometries and then, for each geometry, the calculation engines, pseudo axes required, modes of operation, and any additional parameters required by the mode. The mode defines which axes will be computed, which will be held constant, and any relationships between axes.

Geometries indexed by number of circles

The different diffractometer geometries are distinguished, primarily, by the number of axes (circles) and the names of each. This table is sorted first by the number of circles, and then the geometry name (as used here in hklpy).

#circles	geometry	real_axes
4	E4CH	omega, chi, phi, tth
4	E4CV	omega, chi, phi, tth
4	K4CV	komega, kappa, kphi, tth
4	PETRA3 P23 4C	omega_t, mu, gamma, delta
4	SOLEIL MARS	omega, chi, phi, tth
4	SOLEIL SIXS MED1+2	pitch, mu, gamma, delta
4	ZAXIS	mu, omega, delta, gamma
5	SOLEIL SIXS MED2+2	beta, mu, omega, gamma, delta
5	SOLEIL SIXS MED2+3 v2	mu, omega, gamma, delta, eta_a
6	APS POLAR	tau, mu, chi, phi, gamma, delta
6	E6C	mu, omega, chi, phi, gamma, delta
6	K6C	mu, komega, kappa, kphi, gamma, delta
6	PETRA3 P09 EH2	mu, omega, chi, phi, delta, gamma
6	SOLEIL NANOSCOPIUM ROBOT	rz, rs, rx, r, delta, gamma
6	SOLEIL SIRIUS KAPPA	mu, komega, kappa, kphi, delta, gamma
6	SOLEIL SIRIUS TURRET	basepitch, thetah, alphay, alphax, delta, gamma
6	SOLEIL SIXS MED2+3	beta, mu, omega, gamma, delta, eta_a
7	PETRA3 P23 6C	omega_t, mu, omega, chi, phi, gamma, delta

Tables for each geometry

A table is provided for each diffractometer geometry listing the calculation engines, pseudo axes required, modes of operation, and any additional parameters required by the mode.

• engine : Defines the names (and order) of the pseudo axes.

• pseudo axes : The engine performs forward() (pseudo-to-real) and inverse() (real-to-pseudo) transformations between the real-space axes and the pseudo (typically reciprocal-space) axes. The engine defines the pseudo axes to be used.

• mode : Defines which axes are used for the forward() computation.

• axes read : Axes used in the forward() computation.

• axes written : Axes computed by the forward() computation.

• extra parameters : Any necessary additional parameters.

Geometry: APS POLAR

• real axes: tau, mu, chi, phi, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
hkl	h, k, l	4-circles bissecting horizontal	tau, mu, chi, phi, gamma, delta	mu, chi, phi, gamma
hkl	h, k, l	4-circles constant chi horizontal	tau, mu, chi, phi, gamma, delta	mu, phi, gamma
hkl	h, k, l	4-circles constant mu horizontal	tau, mu, chi, phi, gamma, delta	chi, phi, gamma
hkl	h, k, l	4-circles constant phi horizontal	tau, mu, chi, phi, gamma, delta	mu, chi, gamma
hkl	h, k, l	lifting detector chi	tau, mu, chi, phi, gamma, delta	chi, gamma, delta
hkl	h, k, l	lifting detector mu	tau, mu, chi, phi, gamma, delta	tau, gamma, delta
hkl	h, k, l	lifting detector mu	tau, mu, chi, phi, gamma, delta	tau, gamma, delta
hkl	h, k, l	lifting detector phi	tau, mu, chi, phi, gamma, delta	phi, gamma, delta
hkl	h, k, l	psi constant horizontal	tau, mu, chi, phi, gamma, delta	mu, chi, phi, gamma	h2, k2, l2, psi
hkl	h, k, l	psi constant vertical	tau, mu, chi, phi, gamma, delta	tau, chi, phi, delta	h2, k2, l2, psi
hkl	h, k, l	zaxis + alpha-fixed	tau, mu, chi, phi, gamma, delta	mu, gamma, delta
hkl	h, k, l	zaxis + alpha=beta	tau, mu, chi, phi, gamma, delta	tau, mu, gamma, delta
hkl	h, k, l	zaxis + beta-fixed	tau, mu, chi, phi, gamma, delta	tau, gamma, delta
psi	psi	psi_vertical	tau, mu, chi, phi, gamma, delta	mu, chi, phi, delta	h2, k2, l2

Geometry: E4CH

• real axes: omega, chi, phi, tth

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	omega, chi, phi, tth		x, y, z
hkl	h, k, l	bissector	omega, chi, phi, tth	omega, chi, phi, tth
hkl	h, k, l	constant_chi	omega, chi, phi, tth	omega, phi, tth
hkl	h, k, l	constant_omega	omega, chi, phi, tth	chi, phi, tth
hkl	h, k, l	constant_phi	omega, chi, phi, tth	omega, chi, tth
hkl	h, k, l	double_diffraction	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2
hkl	h, k, l	psi_constant	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	omega, chi, phi		x, y, z
psi	psi	psi	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2
q	q	q	tth	tth

Geometry: E4CV

• real axes: omega, chi, phi, tth

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	omega, chi, phi, tth		x, y, z
hkl	h, k, l	bissector	omega, chi, phi, tth	omega, chi, phi, tth
hkl	h, k, l	constant_chi	omega, chi, phi, tth	omega, phi, tth
hkl	h, k, l	constant_omega	omega, chi, phi, tth	chi, phi, tth
hkl	h, k, l	constant_phi	omega, chi, phi, tth	omega, chi, tth
hkl	h, k, l	double_diffraction	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2
hkl	h, k, l	psi_constant	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	omega, chi, phi		x, y, z
psi	psi	psi	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2
q	q	q	tth	tth

Geometry: E6C

• real axes: mu, omega, chi, phi, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	mu, omega, chi, phi, gamma, delta		x, y, z
hkl	h, k, l	bissector_horizontal	mu, omega, chi, phi, gamma, delta	mu, omega, chi, phi, gamma
hkl	h, k, l	bissector_vertical	mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta
hkl	h, k, l	constant_chi_vertical	mu, omega, chi, phi, gamma, delta	omega, phi, delta
hkl	h, k, l	constant_mu_horizontal	mu, omega, chi, phi, gamma, delta	chi, phi, gamma
hkl	h, k, l	constant_omega_vertical	mu, omega, chi, phi, gamma, delta	chi, phi, delta
hkl	h, k, l	constant_phi_vertical	mu, omega, chi, phi, gamma, delta	omega, chi, delta
hkl	h, k, l	double_diffraction_horizontal	mu, omega, chi, phi, gamma, delta	mu, chi, phi, gamma	h2, k2, l2
hkl	h, k, l	double_diffraction_vertical	mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta	h2, k2, l2
hkl	h, k, l	lifting_detector_mu	mu, omega, chi, phi, gamma, delta	mu, gamma, delta
hkl	h, k, l	lifting_detector_omega	mu, omega, chi, phi, gamma, delta	omega, gamma, delta
hkl	h, k, l	lifting_detector_phi	mu, omega, chi, phi, gamma, delta	phi, gamma, delta
hkl	h, k, l	psi_constant_horizontal	mu, omega, chi, phi, gamma, delta	omega, chi, phi, gamma	h2, k2, l2, psi
hkl	h, k, l	psi_constant_vertical	mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	mu, omega, chi, phi		x, y, z
psi	psi	psi_vertical	mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta	h2, k2, l2
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: K4CV

• real axes: komega, kappa, kphi, tth

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	komega, kappa, kphi, tth		x, y, z
eulerians	omega, chi, phi	eulerians	komega, kappa, kphi	komega, kappa, kphi	solutions
hkl	h, k, l	bissector	komega, kappa, kphi, tth	komega, kappa, kphi, tth
hkl	h, k, l	constant_chi	komega, kappa, kphi, tth	komega, kappa, kphi, tth	chi
hkl	h, k, l	constant_omega	komega, kappa, kphi, tth	komega, kappa, kphi, tth	omega
hkl	h, k, l	constant_phi	komega, kappa, kphi, tth	komega, kappa, kphi, tth	phi
hkl	h, k, l	double_diffraction	komega, kappa, kphi, tth	komega, kappa, kphi, tth	h2, k2, l2
hkl	h, k, l	psi_constant	komega, kappa, kphi, tth	komega, kappa, kphi, tth	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	komega, kappa, kphi		x, y, z
psi	psi	psi	komega, kappa, kphi, tth	komega, kappa, kphi, tth	h2, k2, l2
q	q	q	tth	tth

Geometry: K6C

• real axes: mu, komega, kappa, kphi, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	mu, komega, kappa, kphi, gamma, delta		x, y, z
eulerians	omega, chi, phi	eulerians	komega, kappa, kphi	komega, kappa, kphi	solutions
hkl	h, k, l	bissector_horizontal	mu, komega, kappa, kphi, gamma, delta	mu, komega, kappa, kphi, gamma
hkl	h, k, l	bissector_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta
hkl	h, k, l	constant_chi_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta	chi
hkl	h, k, l	constant_incidence	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, gamma, delta	x, y, z, incidence, azimuth
hkl	h, k, l	constant_kphi_horizontal	mu, komega, kappa, kphi, gamma, delta	mu, komega, kappa, gamma
hkl	h, k, l	constant_omega_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta	omega
hkl	h, k, l	constant_phi_horizontal	mu, komega, kappa, kphi, gamma, delta	mu, komega, kappa, kphi, gamma	phi
hkl	h, k, l	constant_phi_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta	phi
hkl	h, k, l	double_diffraction_horizontal	mu, komega, kappa, kphi, gamma, delta	mu, komega, kappa, kphi, gamma	h2, k2, l2
hkl	h, k, l	double_diffraction_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta	h2, k2, l2
hkl	h, k, l	lifting_detector_komega	mu, komega, kappa, kphi, gamma, delta	komega, gamma, delta
hkl	h, k, l	lifting_detector_kphi	mu, komega, kappa, kphi, gamma, delta	kphi, gamma, delta
hkl	h, k, l	lifting_detector_mu	mu, komega, kappa, kphi, gamma, delta	mu, gamma, delta
hkl	h, k, l	psi_constant_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	mu, komega, kappa, kphi		x, y, z
psi	psi	psi_vertical	mu, komega, kappa, kphi, gamma, delta	komega, kappa, kphi, delta	h2, k2, l2
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: PETRA3 P09 EH2

• real axes: mu, omega, chi, phi, delta, gamma

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
hkl	h, k, l	4-circles bissecting horizontal	mu, omega, chi, phi, delta, gamma	omega, chi, phi, delta
hkl	h, k, l	4-circles constant chi horizontal	mu, omega, chi, phi, delta, gamma	omega, phi, delta
hkl	h, k, l	4-circles constant omega horizontal	mu, omega, chi, phi, delta, gamma	chi, phi, delta
hkl	h, k, l	4-circles constant phi horizontal	mu, omega, chi, phi, delta, gamma	omega, chi, delta
hkl	h, k, l	lifting detector chi	mu, omega, chi, phi, delta, gamma	chi, delta, gamma
hkl	h, k, l	lifting detector mu	mu, omega, chi, phi, delta, gamma	mu, delta, gamma
hkl	h, k, l	lifting detector omega	mu, omega, chi, phi, delta, gamma	omega, delta, gamma
hkl	h, k, l	lifting detector phi	mu, omega, chi, phi, delta, gamma	phi, delta, gamma
hkl	h, k, l	zaxis + alpha-fixed	mu, omega, chi, phi, delta, gamma	omega, delta, gamma
hkl	h, k, l	zaxis + alpha=beta	mu, omega, chi, phi, delta, gamma	mu, omega, delta, gamma
hkl	h, k, l	zaxis + beta-fixed	mu, omega, chi, phi, delta, gamma	mu, delta, gamma

Geometry: PETRA3 P23 4C

• real axes: omega_t, mu, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	omega_t, mu, gamma, delta		x, y, z
hkl	h, k, l	bissector_horizontal	omega_t, mu, gamma, delta	omega_t, mu, gamma
hkl	h, k, l	bissector_vertical	omega_t, mu, gamma, delta	omega_t, mu, delta
hkl	h, k, l	lifting_detector_mu	omega_t, mu, gamma, delta	mu, gamma, delta
hkl	h, k, l	lifting_detector_omega_t	omega_t, mu, gamma, delta	omega_t, gamma, delta
hkl	h, k, l	psi_constant	omega_t, mu, gamma, delta	omega_t, mu, gamma, delta	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	omega_t, mu		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: PETRA3 P23 6C

• real axes: omega_t, mu, omega, chi, phi, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	omega_t, mu, omega, chi, phi, gamma, delta		x, y, z
hkl	h, k, l	bissector_horizontal	omega_t, mu, omega, chi, phi, gamma, delta	mu, omega, chi, phi, gamma
hkl	h, k, l	bissector_vertical	omega_t, mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta
hkl	h, k, l	constant_chi_vertical	omega_t, mu, omega, chi, phi, gamma, delta	omega, phi, delta
hkl	h, k, l	constant_mu_horizontal	omega_t, mu, omega, chi, phi, gamma, delta	chi, phi, gamma
hkl	h, k, l	constant_omega_vertical	omega_t, mu, omega, chi, phi, gamma, delta	chi, phi, delta
hkl	h, k, l	constant_phi_vertical	omega_t, mu, omega, chi, phi, gamma, delta	omega, chi, delta
hkl	h, k, l	double_diffraction_horizontal	omega_t, mu, omega, chi, phi, gamma, delta	mu, chi, phi, gamma	h2, k2, l2
hkl	h, k, l	double_diffraction_vertical	omega_t, mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta	h2, k2, l2
hkl	h, k, l	lifting_detector_mu	omega_t, mu, omega, chi, phi, gamma, delta	mu, gamma, delta
hkl	h, k, l	lifting_detector_omega	omega_t, mu, omega, chi, phi, gamma, delta	omega, gamma, delta
hkl	h, k, l	lifting_detector_phi	omega_t, mu, omega, chi, phi, gamma, delta	phi, gamma, delta
hkl	h, k, l	psi_constant_horizontal	omega_t, mu, omega, chi, phi, gamma, delta	omega, chi, phi, gamma	h2, k2, l2, psi
hkl	h, k, l	psi_constant_vertical	omega_t, mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	omega_t, mu, omega, chi, phi		x, y, z
psi	psi	psi_vertical	omega_t, mu, omega, chi, phi, gamma, delta	omega, chi, phi, delta	h2, k2, l2
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: SOLEIL MARS

• real axes: omega, chi, phi, tth

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	omega, chi, phi, tth		x, y, z
hkl	h, k, l	bissector	omega, chi, phi, tth	omega, chi, phi, tth
hkl	h, k, l	constant_chi	omega, chi, phi, tth	omega, phi, tth
hkl	h, k, l	constant_omega	omega, chi, phi, tth	chi, phi, tth
hkl	h, k, l	constant_phi	omega, chi, phi, tth	omega, chi, tth
hkl	h, k, l	double_diffraction	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2
hkl	h, k, l	psi_constant	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	omega, chi, phi		x, y, z
psi	psi	psi	omega, chi, phi, tth	omega, chi, phi, tth	h2, k2, l2
q	q	q	tth	tth

Geometry: SOLEIL NANOSCOPIUM ROBOT

• real axes: rz, rs, rx, r, delta, gamma

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
hkl	h, k, l	lifting detector rs	rz, rs, rx, r, delta, gamma	rs, delta, gamma
hkl	h, k, l	lifting detector rx	rz, rs, rx, r, delta, gamma	rx, delta, gamma
hkl	h, k, l	lifting detector rz	rz, rs, rx, r, delta, gamma	rz, delta, gamma

Geometry: SOLEIL SIRIUS KAPPA

• real axes: mu, komega, kappa, kphi, delta, gamma

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	mu, komega, kappa, kphi, gamma, delta		x, y, z
eulerians	omega, chi, phi	eulerians	komega, kappa, kphi	komega, kappa, kphi	solutions
hkl	h, k, l	bissector_horizontal	mu, komega, kappa, kphi, delta, gamma	mu, komega, kappa, kphi, delta
hkl	h, k, l	bissector_vertical	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma
hkl	h, k, l	constant_chi_vertical	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma	chi
hkl	h, k, l	constant_incidence	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, delta, gamma	x, y, z, incidence, azimuth
hkl	h, k, l	constant_kphi_horizontal	mu, komega, kappa, kphi, delta, gamma	mu, komega, kappa, delta
hkl	h, k, l	constant_omega_vertical	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma	omega
hkl	h, k, l	constant_phi_horizontal	mu, komega, kappa, kphi, delta, gamma	mu, komega, kappa, kphi, delta	phi
hkl	h, k, l	constant_phi_vertical	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma	phi
hkl	h, k, l	double_diffraction_horizontal	mu, komega, kappa, kphi, delta, gamma	mu, komega, kappa, kphi, delta	h2, k2, l2
hkl	h, k, l	double_diffraction_vertical	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma	h2, k2, l2
hkl	h, k, l	lifting_detector_komega	mu, komega, kappa, kphi, delta, gamma	komega, delta, gamma
hkl	h, k, l	lifting_detector_kphi	mu, komega, kappa, kphi, delta, gamma	kphi, delta, gamma
hkl	h, k, l	lifting_detector_mu	mu, komega, kappa, kphi, delta, gamma	mu, delta, gamma
hkl	h, k, l	psi_constant_vertical	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma	h2, k2, l2, psi
incidence	incidence, azimuth	incidence	mu, komega, kappa, kphi		x, y, z
psi	psi	psi_vertical_soleil_sirius_kappa	mu, komega, kappa, kphi, delta, gamma	komega, kappa, kphi, gamma	h2, k2, l2
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: SOLEIL SIRIUS TURRET

• real axes: basepitch, thetah, alphay, alphax, delta, gamma

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	basepitch, thetah, alphay, alphax, delta, gamma		x, y, z
hkl	h, k, l	lifting_detector_thetah	basepitch, thetah, alphay, alphax, delta, gamma	thetah, delta, gamma
incidence	incidence, azimuth	incidence	basepitch, thetah, alphay, alphax		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: SOLEIL SIXS MED1+2

• real axes: pitch, mu, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	pitch, mu, gamma, delta		x, y, z
hkl	h, k, l	delta_fixed	pitch, mu, gamma, delta	pitch, mu, gamma
hkl	h, k, l	pitch_fixed	pitch, mu, gamma, delta	mu, gamma, delta
incidence	incidence, azimuth	incidence	pitch, mu		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: SOLEIL SIXS MED2+2

• real axes: beta, mu, omega, gamma, delta

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	beta, mu, omega, gamma, delta		x, y, z
hkl	h, k, l	emergence_fixed	beta, mu, omega, gamma, delta	mu, omega, gamma, delta	x, y, z, emergence
hkl	h, k, l	mu_fixed	beta, mu, omega, gamma, delta	omega, gamma, delta
hkl	h, k, l	reflectivity	beta, mu, omega, gamma, delta	mu, omega, gamma, delta
incidence	incidence, azimuth	incidence	beta, mu, omega		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: SOLEIL SIXS MED2+3

• real axes: beta, mu, omega, gamma, delta, eta_a

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	beta, mu, omega, gamma, delta		x, y, z
hkl	h, k, l	emergence_fixed	beta, mu, omega, gamma, delta, eta_a	mu, omega, gamma, delta	x, y, z, emergence
hkl	h, k, l	gamma_fixed	beta, mu, omega, gamma, delta, eta_a	mu, omega, delta
hkl	h, k, l	mu_fixed	beta, mu, omega, gamma, delta, eta_a	omega, gamma, delta
incidence	incidence, azimuth	incidence	beta, mu, omega		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: SOLEIL SIXS MED2+3 v2

• real axes: mu, omega, gamma, delta, eta_a

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	beta, mu, omega, gamma, delta		x, y, z
hkl	h, k, l	emergence_fixed	mu, omega, gamma, delta, eta_a	mu, omega, gamma, delta	x, y, z, emergence
hkl	h, k, l	gamma_fixed	mu, omega, gamma, delta, eta_a	mu, omega, delta
hkl	h, k, l	mu_fixed	mu, omega, gamma, delta, eta_a	omega, gamma, delta
incidence	incidence, azimuth	incidence	beta, mu, omega		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta

Geometry: ZAXIS

• real axes: mu, omega, delta, gamma

• pseudo axes: depends on the engine

engine	pseudo axes	mode	axes read	axes written	extra parameters
emergence	emergence, azimuth	emergence	mu, omega, delta, gamma		x, y, z
hkl	h, k, l	reflectivity	mu, omega, delta, gamma	mu, omega, delta, gamma
hkl	h, k, l	zaxis	mu, omega, delta, gamma	omega, delta, gamma
incidence	incidence, azimuth	incidence	mu, omega		x, y, z
q2	q, alpha	q2	gamma, delta	gamma, delta
qper_qpar	qper, qpar	qper_qpar	gamma, delta	gamma, delta	x, y, z
tth2	tth, alpha	tth2	gamma, delta	gamma, delta