Field quality plots

Use the output of a harmonic coil and show the Field quality

Download Input files

• dipole_2d.data

• dipole_2d.post.xml

Setting up

Standard Loading of input, Parsing and Initializing RoxiePlotOutputs object

from roxieapi.output.plots import RoxiePlotOutputs

plots = RoxiePlotOutputs(
    "../input_files/dipole_2d.post.xml", "../input_files/dipole_2d.data"
)

Field quality tables

Field quality tables are parsed and accessible in the parser. To load, we select the Harmonic coil id and get it from the parser.

harmonic_coil = plots.output.get_harmonic_coil(1)
assert (
    harmonic_coil is not None
)  # We assume the input file is correct and harmonic coils are defined
dfs = plots.tables.print_harmonic_coil(harmonic_coil)

The output returns 3 Tables: - Coil definites

dfs[0]

	type	reference radius (mm)	x position (mm)	y position (mm)
0	Cylindrical	17.0	0.0	0.0

• Field information

dfs[1]

	main field (T)	reference magnet strength (T)	error of harmonic analysis of br
0	-7.169634072777	-7.169634072777	0.0003159894656828

• Harmonics table

dfs[2]

	Order	bn	an
0	1	1.000000e+04	1.986444e-12
1	2	7.947441e-13	7.458240e-13
2	3	2.456824e+00	-1.330748e-13
3	4	1.161683e-12	-2.706258e-12
4	5	-4.926023e+00	-2.231423e-12
5	6	-1.054013e-12	1.504351e-12
6	7	1.787194e+00	2.314897e-12
7	8	5.846220e-13	-7.246530e-13
8	9	1.380537e-01	-1.520078e-12
9	10	8.335324e-13	1.977976e-12
10	11	6.914776e-01	8.256689e-13
11	12	7.313067e-13	3.205894e-13
12	13	5.154286e-02	-1.034959e-12
13	14	3.502288e-13	-8.002637e-13
14	15	4.286381e-02	-1.639240e-12
15	16	3.381311e-13	-1.618674e-12
16	17	-5.466254e-02	1.075487e-12
17	18	-2.703234e-12	8.475658e-12
18	19	-1.079437e-03	1.327724e-12
19	20	6.151687e-13	-1.265663e-11

Plotting as bar graph

Alternatively, the Harmonics can be plotted as bar graph:

figure = plots.graphs.plot_harmonics(harmonic_coil)
figure