Specify dr_tf_inboard in ST eval file

[timothy-nunn]

Adds dr_tf_inboard = 0.9 to spherical_tokamak_eval.IN.DAT, the value is taken from the st_regression.IN.DAT optimised solution.

This was causing the winding pack to become excessively large, meaning the cable plotting algorithm was iterating over trillions of elements:

1. dr_tf_inboard was 0 (its default) which caused dr_tf_wp_with_insulation to become negative

   PROCESS/process/build.py

   Lines 1783 to 1790 in 40782b5

   	# WP radial thickness [m]
   	# Calculated only if not used as an iteration variable
   	if 140 not in numerics.ixc[0 : numerics.nvar]:
   	tfcoil_variables.dr_tf_wp_with_insulation = (
   	build_variables.dr_tf_inboard
   	- tfcoil_variables.dr_tf_plasma_case
   	- tfcoil_variables.dr_tf_nose_case
   	)

2. Which causes j_tf_wf to become 1

   PROCESS/process/superconducting_tf_coil.py

   Lines 2722 to 2729 in 40782b5

   	tfcoil_variables.j_tf_wp = max(
   	1.0e0,
   	tfcoil_variables.c_tf_total
   	/ (
   	tfcoil_variables.n_tf_coils
   	* superconducting_tf_coil_variables.a_tf_wp_no_insulation
   	),
   	)

3. Which causes the turn area to become excessively large (6 orders of magnitude larger than in st_regression.IN.DAT) and dx_tf_turn_general is consequently larger (~250m rather than a couple of cm/mm).

   PROCESS/process/superconducting_tf_coil.py

   Lines 2784 to 2787 in 40782b5

   	a_tf_turn = c_tf_turn / j_tf_wp
   	# Dimension of square cross-section of each turn including inter-turn insulation [m]
   	dx_tf_turn_general = np.sqrt(a_tf_turn)

4. In plot_proc, this unreasonably large winding pack causes the number of rows and columns in the cable plotting routine to become large (n_rows = 340377, n_cols = 294775) which causes the for loop to iterate ~ $10^{11}$ times rather than the few hundred times it iterates for st_regression.IN.DAT

[timothy-nunn]

spherical_tokamak_eval.MFILE.DAT.SUMMARY.pdf
spherical_tokamak_eval.MFILE.DAT.txt
spherical_tokamak_eval.OUT.DAT.txt

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.46%. Comparing base (40782b5) to head (c037936).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4081   +/-   ##
=======================================
  Coverage   46.46%   46.46%           
=======================================
  Files         122      122           
  Lines       28838    28838           
=======================================
  Hits        13401    13401           
  Misses      15437    15437           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.