deerlab.ex_3pdeer¶

ex_3pdeer(tau, pathways=[1, 2], pulselength=0.016)[source]¶

Generate a 3-pulse DEER dipolar experiment model.

The figure below shows the dipolar pathways in 3-pulse DEER. The observer (black) and pump (grey) pulses and their interpulse delays are shown on the top. The middle table summarizes all detectable modulated dipolar pathways $p$ along their dipolar phase accumulation factors $\mathbf{s}_p$ , harmonics $\delta_p$ and refocusing times $t_{\mathrm{ref},p}$ . The most commonly encountered pathways are highlighted in color. The bottom panel shows a decomposition of the dipolar signal into the individual intramolecular contributions (shown as colored lines).

../_images/ex_3pdeer_pathways.png — Source: L. Fábregas-Ibáñez, Advanced data analysis and modeling in dipolar EPR spectroscopy, Doctoral dissertation, 2022¶

Parameters:

taufloat scalar: Static interpulse delay $\tau$ .
pathwaysarray_like, optional: Pathways to include in the model. The pathways are specified as a list of pathways labels $p$ . By default, both pathways are included as shown in the table above.
pulselengthfloat scalar, optional: Length of the longest microwave pulse in the sequence in microseconds. Used to determine the uncertainty in the boundaries of the pathway refocusing times.

Returns:

experimentExperimentInfo object: Experiment object. Can be passed to dipolarmodel to introduce better constraints into the model.