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Slight modification to copper fraction description within TF coil documentation #3343

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chris-ashe merged 1 commit into from
Oct 8, 2024
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Slight modification to copper fraction description within TF coil documentation #3343

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5 changes: 3 additions & 2 deletions documentation/proc-pages/eng-models/tf-coil.md
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Original file line number Diff line number Diff line change
Expand Up @@ -258,7 +258,8 @@ turns. The number of turns can be parametrized in three different ways :
- <p style='text-align: justify;'>
**Copper fraction (`fcutfsu`):** user input setting the copper fraction.
This fraction is applied after the void and helium cooling channels areas
has been removed from the conductor area.
has been removed from the conductor area. Does not include any copper from
REBCO tape if used.
</p>


Expand Down Expand Up @@ -1167,7 +1168,7 @@ Switch `i_tf_sc_mat` specifies which superconducting material is to be used:
- `i_tf_sc_mat == 8` -- Durham Ginzburg-Landau critical surface model for REBCO
- `i_tf_sc_mat == 9` -- Hazelton experimental data combined with Zhai conceptual model for REBCO

The fraction of copper present in the superconducting filaments is given by `fcutfsu` (iteration variable number 59).
The fraction of copper present in the superconducting filaments is given by `fcutfsu` (iteration variable number 59). For cases where REBCO tape is used this copper fraction does not include the copper within the tape.

For `i_tf_sc_mat = 2`, a technology adjustment factor `fhts` may be used to modify
the critical current density fit for the Bi-2212 superconductor, to describe the
Expand Down