scippneutron.conversion.tof

Functions for computing coordinates in time-of-flight neutron scattering.

Some functions in this module use the neutron mass \(m_n\) and Planck constant \(h\). Their values are taken from scipp.constants.

Functions

Q_elements_from_wavelength(*, wavelength, ...)	Compute them momentum transfer vector from wavelength.
Q_from_wavelength(*, wavelength, two_theta)	Compute the absolute value of the momentum transfer from wavelength.
Q_vec_from_Q_elements(*, Qx, Qy, Qz)	Combine elements of Q into a single vector variable.
dspacing_from_energy(*, energy, two_theta)	Compute the d-spacing from the neutron energy.
dspacing_from_tof(*, tof, Ltotal, two_theta)	Compute the d-spacing from time-of-flight.
dspacing_from_wavelength(*, wavelength, ...)	Compute the d-spacing from wavelength.
energy_from_tof(*, tof, Ltotal)	Compute the neutron energy from time-of-flight.
energy_from_wavelength(*, wavelength)	Compute the neutron energy from wavelength.
energy_transfer_direct_from_tof(*, tof, L1, ...)	Compute the energy transfer in direct inelastic scattering.
energy_transfer_indirect_from_tof(*, tof, ...)	Compute the energy transfer in indirect inelastic scattering.
hkl_elements_from_hkl_vec(*, hkl_vec)	Unpack vector of hkl indices into separate variables.
hkl_vec_from_Q_vec(*, Q_vec, ub_matrix, ...)	Compute hkl indices from momentum transfer.
time_at_sample_from_tof(*, pulse_time, tof, ...)	Compute the absolute time when the neutron passed through the sample.
ub_matrix_from_u_and_b(*, u_matrix, b_matrix)	Compute the UB matrix from U and B matrices.
wavelength_from_Q(*, Q, two_theta)	Compute the wavelength from momentum transfer.
wavelength_from_energy(*, energy)	Compute the wavelength from the neutron energy.
wavelength_from_tof(*, tof, Ltotal)	Compute the wavelength from time-of-flight.