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🧲 Added plasma magnetic energy #3906

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Merged
clmould merged 2 commits into from
Oct 14, 2025
Merged

🧲 Added plasma magnetic energy #3906

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f26ee12
:sparkle: Add `e_plasma_magnetic_stored` variable to track plasma sto…
chris-ashe Oct 14, 2025
5aef984
Add calculation and output for plasma stored magnetic energy
chris-ashe Oct 14, 2025
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5 changes: 5 additions & 0 deletions process/data_structure/physics_variables.py
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,9 @@
b_plasma_total: float = None
"""Sum of plasma total toroidal + poloidal field (T)"""

e_plasma_magnetic_stored: float = None
"""Plasma stored magnetic energy (J)"""


burnup: float = None
"""fractional plasma burnup"""
Expand Down Expand Up @@ -1392,6 +1395,7 @@ def init_physics_variables():
global b_plasma_poloidal_average
global b_plasma_toroidal_on_axis
global b_plasma_total
global e_plasma_magnetic_stored
global burnup
global burnup_in
global b_plasma_vertical_required
Expand Down Expand Up @@ -1644,6 +1648,7 @@ def init_physics_variables():
b_plasma_poloidal_average = 0.0
b_plasma_toroidal_on_axis = 5.68
b_plasma_total = 0.0
e_plasma_magnetic_stored = 0.0
burnup = 0.0
burnup_in = 0.0
b_plasma_vertical_required = 0.0
Expand Down
3 changes: 2 additions & 1 deletion process/io/plot_proc.py
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Expand Up @@ -2681,7 +2681,8 @@ def plot_main_plasma_information(
f"$\\Omega_{{\\text{{p}}}}$: {mfile_data.data['res_plasma'].get_scan(scan):.4e} $\\Omega$\n"
f"Plasma resistive diffusion time: {mfile_data.data['t_plasma_res_diffusion'].get_scan(scan):.4f} s\n"
f"Plasma inductance: {mfile_data.data['ind_plasma'].get_scan(scan):.4e} H\n"
f"Plasma normalised internal inductance: {mfile_data.data['ind_plasma_internal_norm'].get_scan(scan):.4f}\n"
f"Plasma stored magnetic energy: {mfile_data.data['e_plasma_magnetic_stored'].get_scan(scan) / 1e9:.4f} GJ\n"
f"Plasma normalised internal inductance: {mfile_data.data['ind_plasma_internal_norm'].get_scan(scan):.4f}"
)

axis.text(
Expand Down
11 changes: 11 additions & 0 deletions process/physics.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2544,6 +2544,10 @@ def physics(self):
physics_variables.ind_plasma_internal_norm,
)

physics_variables.e_plasma_magnetic_stored = (
0.5e0 * physics_variables.ind_plasma * physics_variables.plasma_current**2
)

# Calculate auxiliary physics related information
sbar = 1.0e0
(
Expand Down Expand Up @@ -6234,6 +6238,13 @@ def outplas(self):
physics_variables.ind_plasma,
"OP ",
)
po.ovarre(
self.outfile,
"Plasma magnetic energy stored (J)",
"(e_plasma_magnetic_stored)",
physics_variables.e_plasma_magnetic_stored,
"OP ",
)
po.ovarrf(
self.outfile,
"Plasma normalised internal inductance",
Expand Down
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