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scipp / esspolarization

Polarization data reduction for the European Spallation Source
https://scipp.github.io/esspolarization/
BSD 3-Clause "New" or "Revised" License
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Implement missing supermirror function #65

Closed SimonHeybrock closed 2 days ago

SimonHeybrock commented 2 weeks ago

See https://github.com/scipp/esspolarization/blob/123b96a89df3a654771c0dcca41870e5e32df661/src/ess/polarization/supermirror.py#L13-L16.

@astellhorn can you provide the required equations?

astellhorn commented 6 days ago

Can we add one example where the supermirror efficiency funtion is a polynomial of 2nd order, i.e. Efficiency = a + b * lambda + c * lambda * lambda, and one can set a, b, c? Then the transmission function of that efficiency function with parallel and antiparallel neutron states (T+ and T- values in the SM matrix) is: T_\pm = (1 \pm E)/2. Here, "parallel" means "parallel to the guide field, i.e., to the setting of the SM"