Followup high-medium focus tests

We pushed a little further on the echelle mirror screw to see if we could get addition improvement in the best focus over the values attained at echelle +15 (see blogpost "Pinhole focus tests")

These are once again pinhole spectra taken in hires mode of the Q-branch of acetylene. Here we report the median and stddev of 5 line width measurements fit with clickfit.pro.

All files are in /B_12_02_24/


#filename echelle_mirror_position echelon_mirror_position spatial_FWHM sig_spatial_FWHM spectral_FWHM sig_spectral_FWHM

b002.fits    15    22.5    9.91    0.65    7.01    0.58
b003.fits    15    20.5    8.41    0.45    6.87    0.51
b004.fits    15    18.5    7.66    0.38    6.92    0.34
b005.fits    15    16.5    7.45    0.36    7.64    0.28
b006.fits    15    14.5    7.65    0.43    8.85    0.51
b007.fits    17    12.5    7.37    0.43    8.63    0.50
b008.fits    17    14.5    7.04    0.29    7.30    0.51
b009.fits    17    16.5    7.19    0.28    6.48    0.60
b010.fits    17    18.5    7.77    0.32    6.67    0.60
b011.fits    17    20.5    8.99    0.49    6.72    0.60
b012.fits    17    16.5    7.25    0.35    6.66    0.56

The best spectral focus is at 17 turns on the echelle mirror screws and 16.5 turns on the echelon mirror screws.