Monday, March 19, 2012

High-medium slit resolutions for 7.5um


This setting uses close to the same angle as for the 4th order Q-branch of C2H2 with filter=14um.
We use the filter=7.466um to acquire H2O lines in 7th order near 1315cm-1. The spectra were taken with the gas cell rinsed and continually pumping.

The line FWHM had a scatter of between 0.5 and 0.84 in stddev for the eight lines reported here, compared to about 0.4-0.5 for the 6 lines in the 13.7um. I'm not sure what that means, except maybe we should look for a C2H2 set of lines next time for doing resolution tests. 

Using R=816800/FWHM found from 13.7um tests to calculate resolution.

This data is in B_12_02_28/
filename    slit             1           3           5           6           7           8         11        12    med(FWHM)    R
b003    3.5km/s    10.41    10.28    11.27    11.53    10.88    10.99    11.19    10.30    10.99    74307
b004    2.7km/s      8.96     9.17      9.85     10.23     9.64      9.69    10.17      9.00       9.69    84259
b005    2.0km/s      8.23     8.48      9.09      9.64      8.91      8.99     9.80       8.33       8.99    90858
b006    1.5km/s      7.75     7.83      7.77      8.89      8.39      8.60     9.15       7.66       8.39    97406
b008    6.0km/s    14.77    14.00    15.79    16.24    14.59    15.13    14.36    13.88    14.77    55304
b009    4.5km/s    12.05    11.75    13.11    13.49    12.13    12.44    12.38    11.52    12.38    65972

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