id4_common.devices.polar_diffractometer#

Polar diffractometer

Module Contents#

id4_common.devices.polar_diffractometer.WAVELENGTH_CONSTANT = 12.39#

id4_common.devices.polar_diffractometer.PTTH_MIN_DEGREES = 79#

id4_common.devices.polar_diffractometer.PTTH_MAX_DEGREES = 101#

id4_common.devices.polar_diffractometer.PTH_MIN_DEGREES = 39#

id4_common.devices.polar_diffractometer.PTH_MAX_DEGREES = 51#

id4_common.devices.polar_diffractometer.ANALYZER_LIST_PATH#

class id4_common.devices.polar_diffractometer.AnalyzerDevice#

Bases: ophyd.PseudoPositioner

Crystal polarization analyzer with pseudo-energy axis and crystal setup.

energy#

th#

tth_trans#

th_motor#

tth#

eta#

chi#

d_spacing#

crystal#

tth_detector_distance#

tracking#

move_single(pseudo, position, **kwargs)#: Guard move_single to require analyzer setup before moving energy.

property beamline_wavelength#: Return the current beamline wavelength from the parent diffractometer calc.

property beamline_energy#: Return the current beamline energy in keV from the parent diffractometer.

convert_energy_to_theta(energy)#: Convert photon energy (keV) to Bragg angle (degrees) using the crystal d-spacing.

convert_energy_to_tth_trans(energy)#: Convert photon energy (keV) to the two-theta translation stage position (mm).

convert_theta_to_energy(theta)#: Convert Bragg angle (degrees) to photon energy (keV) using the crystal d-spacing.

forward(pseudo_pos)#: Run a forward (pseudo -> real) calculation

inverse(real_pos)#: Run an inverse (real -> pseudo) calculation

set_energy(energy)#: Calibrate the Bragg-angle motor to match the given photon energy (keV).

calc(acal='No')#: Print analyzer Bragg angles and optionally calibrate the theta motor.

setup(analyzer_energy=None, analyzer_list_path=ANALYZER_LIST_PATH)#: List compatible analyzer crystals and interactively configure d-spacing and crystal.

class id4_common.devices.polar_diffractometer.SixCircleDiffractometer#

Bases: hkl.geometries.ApsPolar

ApsPolar: Huber diffractometer in 6-circle horizontal geometry with energy.

HKL engine.

h#

k#

l#

tau#

mu#

gamma#

delta#

tablex#

tabley#

pad_rail#

point_rail#

filter#

detslt#

ana#

energy#

energy_update_calc_flag#

energy_offset#

property hints#: Return hinted fields, excluding non-hinted components to prevent busy plotting.

default_settings()#: Update the HKL calc engine energy from the EPICS monochromator readback.

class id4_common.devices.polar_diffractometer.CradleDiffractometer#

Bases: SixCircleDiffractometer

SixCircleDiffractometer with cradle chi/phi motors and sample XYZ positioning.

chi#

phi#

x#

y#

z#

class id4_common.devices.polar_diffractometer.HPDiffractometer#

Bases: SixCircleDiffractometer

SixCircleDiffractometer for the HP press setup with base and nano- positioning motors.

chi#

phi#

basex#

basey#

basez#

basey_motor#

basez_motor#

sample_tilt#

x#

y#

z#

nanox#

nanoy#

nanoz#

class id4_common.devices.polar_diffractometer.PolarPSI#

Bases: hkl.geometries.ApsPolar

ApsPolar: Huber diffractometer in 6-circle horizontal geometry with energy.

Psi engine.

psi#

tau#

mu#

gamma#

delta#

class id4_common.devices.polar_diffractometer.CradlePSI#

Bases: PolarPSI

PolarPSI diffractometer with cradle chi and phi motors.

chi#

phi#

class id4_common.devices.polar_diffractometer.HPPSI#

Bases: PolarPSI

PolarPSI diffractometer for the HP press with its chi and phi motors.

chi#

phi#