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BIGFOOT (Cavity)
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MarcEisenmann - 10:37, Monday 03 April 2023 (3210)Get code to link to this report
New fitting of LC as a function of voltage

We tried to fit with various function the LC retardation as a function of applied voltage.

Up to now we were using R = a + b/(1+(V/c)**d)**e (1pole in attached figure) but it seemed not optimal as seen from the residual shape.

We now tried the 2 poles function : R = a + b/(1+(V/c)**d)**e + b/(1+(V/f)**g)**h and 2 different poles :  R = a + b/(1+(V/c)**d)**e + i/(1+(V/f)**g)**h.

These 2 functions improved a lot both residual rms and peak-to-peak values. We are now able to reconstruct the LC retardance better than for polarimetry.

New step is to add the temperature dependence.

Images attached to this report
3210_20230403033746_newfit.png