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   62023
   The G4 III-IV yellow giant star, 24 DK UMa, is a rare example of a
   post-Hertzsprung Gap star, which is now poised to start its first
   ascent of the red giant branch. It occupies a strategic location in the
   H-R diagram, at the end point of a rapid spindown and decline in dynamo
   activity, and just prior to the onset of deep convective mixing. We
   propose to obtain a 40 ks ASCA spectrum, which we will analyze jointly
   with our existing near UV and EUV spectra to infer the distribution of
   chromospheric and coronal material as a function of altitude and
   temperature. A comparison will be made with stars of the same mass but
   at different phases of post main sequence evolution in order to study
   changes in dynamo activity.
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