Rename alphas to specify thermal

[chris-ashe]

Description

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 71.42857% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.63%. Comparing base (616f749) to head (4c61104).

Files with missing lines	Patch %	Lines
process/core/io/plot/summary.py	0.00%	1 Missing ⚠️
process/models/physics/physics.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4428   +/-   ##
=======================================
  Coverage   48.63%   48.63%           
=======================================
  Files         151      151           
  Lines       29673    29673           
=======================================
  Hits        14432    14432           
  Misses      15241    15241           

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