scippneutron.conversion.tof.dspacing_from_tof#

scippneutron.conversion.tof.dspacing_from_tof(*, tof, Ltotal, two_theta)[source]#

Compute the d-spacing from time-of-flight.

The result is the inter-planar lattice spacing

\[d = \frac{h t}{m_n L_\mathsf{total}\; 2 \sin \theta}\]

Where \(m_n\) is the neutron mass and \(h\) the Planck constant.

Parameters:

  • tof (Variable) – Time-of-flight \(t\).

  • Ltotal (Variable) – Total beam length.

  • two_theta (Variable) – Scattering angle \(2 \theta\).

Returns:

Variable – Inter-planar lattice spacing \(d\). Has unit ångström.

See also

scippneutron.conversions.beamline

Definitions of two_theta and Ltotal.