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Compare a coarse Nestor run against a fine only-coils run #413

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Compare a coarse Nestor run against a fine only-coils run #413

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37 changes: 23 additions & 14 deletions examples/compare_nestor_only_coils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -12,16 +12,20 @@
folder = Path("examples/data")

vmecpp_nestor = h5py.File(folder / "w7x_free_bdy_vac_nestor.out.h5", "r")
nfp = vmecpp_nestor["/wout/nfp"][()]
ns = vmecpp_nestor["/wout/ns"][()]
mnmax = vmecpp_nestor["/wout/mnmax"][()]
xm = vmecpp_nestor["/wout/xm"][()]
xn = vmecpp_nestor["/wout/xn"][()]
ref_nfp = vmecpp_nestor["/wout/nfp"][()]
ref_ns = vmecpp_nestor["/wout/ns"][()]
ref_mnmax = vmecpp_nestor["/wout/mnmax"][()]
ref_xm = vmecpp_nestor["/wout/xm"][()]
ref_xn = vmecpp_nestor["/wout/xn"][()]
ref_rmnc = vmecpp_nestor["/wout/rmnc"][()]
ref_zmns = vmecpp_nestor["/wout/zmns"][()]

vmecpp_only_coils = h5py.File(folder / "w7x_free_bdy_vac_only_coils.out.h5", "r")
# assume the rest is consistent
tst_nfp = vmecpp_only_coils["/wout/nfp"][()]
tst_ns = vmecpp_only_coils["/wout/ns"][()]
tst_mnmax = vmecpp_only_coils["/wout/mnmax"][()]
tst_xm = vmecpp_only_coils["/wout/xm"][()]
tst_xn = vmecpp_only_coils["/wout/xn"][()]
tst_rmnc = vmecpp_only_coils["/wout/rmnc"][()]
tst_zmns = vmecpp_only_coils["/wout/zmns"][()]

Expand All @@ -30,21 +34,26 @@
theta = np.linspace(0.0, 2.0 * np.pi, ntheta)
for phi_degrees in [0, 18, 36]:
phi = np.deg2rad(phi_degrees)
kernel = np.outer(xm, theta) - np.outer(xn, phi)
cos_kernel = np.cos(kernel)
sin_kernel = np.sin(kernel)

ref_kernel = np.outer(ref_xm, theta) - np.outer(ref_xn, phi)
ref_cos_kernel = np.cos(ref_kernel)
ref_sin_kernel = np.sin(ref_kernel)

tst_kernel = np.outer(tst_xm, theta) - np.outer(tst_xn, phi)
tst_cos_kernel = np.cos(tst_kernel)
tst_sin_kernel = np.sin(tst_kernel)

plt.figure()
for j in [0, 2**2, 4**2, 6**2, 50]:
ref_r = np.dot(ref_rmnc[j, :], cos_kernel)
ref_z = np.dot(ref_zmns[j, :], sin_kernel)
for j in [0, 2**2, 4**2, 6**2, -1]:
ref_r = np.dot(ref_rmnc[j, :], ref_cos_kernel)
ref_z = np.dot(ref_zmns[j, :], ref_sin_kernel)
if j == 0:
plt.plot(ref_r, ref_z, "ro", label="Nestor")
else:
plt.plot(ref_r, ref_z, "r-", lw=2)

tst_r = np.dot(tst_rmnc[j, :], cos_kernel)
tst_z = np.dot(tst_zmns[j, :], sin_kernel)
tst_r = np.dot(tst_rmnc[j, :], tst_cos_kernel)
tst_z = np.dot(tst_zmns[j, :], tst_sin_kernel)
if j == 0:
plt.plot(tst_r, tst_z, "bx", label="only coils")
else:
Expand Down
12 changes: 6 additions & 6 deletions examples/data/w7x_free_bdy_vac_only_coils.json
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
{
"lasym" : false,
"nfp" : 5,
"mpol" : 7,
"ntor" : 6,
"mpol" : 20,
"ntor" : 12,
"ntheta" : 0,
"nzeta" : 36,
"ns_array" : [ 51 ],
"ftol_array" : [ 1.0E-12 ],
"ns_array" : [ 99 ],
"ftol_array" : [ 1.0E-15 ],
"niter_array" : [ 50000 ],
"delt" : 1.0,
"tcon0" : 1.0,
Expand All @@ -23,8 +23,8 @@
"ac" : [ 0.0, 1.0 ],
"curtor" : 0.0,
"bloat" : 1.0,
"raxis_c" : [ 5.6343, 0.35209, 0.0, 0.0, 0.0, 0.0, 0.0 ],
"zaxis_s" : [ 0.0, -0.29578, 0.0, 0.0, 0.0, 0.0, 0.0 ],
"raxis_c" : [ 5.6343, 0.35209, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ],
"zaxis_s" : [ 0.0, -0.29578, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 ],
"rbc" : [ {
"n" : 0,
"m" : 0,
Expand Down
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