File:VFPt hexapol wires Babs+contour.svg

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Original file ‎(SVG file, nominally 600 × 600 pixels, file size: 233 KB)

Captions

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Summary[edit]

Description
English: Magnetic field of six infinite wires perpendicular to the image plane in hexapole configuration, conducting current into and out of the image plane. The absolute magnetic field strength is shown as background contour plot.
Date
Source Own work
Author Geek3
Other versions VFPt hexapol wires.svg
SVG development
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The SVG code is valid.
 
This plot was created with VectorFieldPlot.
Source code
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Python code

# paste this code at the end of VectorFieldPlot 3.2
# https://commons.wikimedia.org/wiki/User:Geek3/VectorFieldPlot
doc = FieldplotDocument('VFPt_hexapol_wires_Babs+contour', width=600, height=600, commons=True)
nw = 6
r = 1.8
wires = []
for i in range(nw):
    wires.append(['wire', {'x':r * cos(2*pi*i/nw),
                  'y':r * sin(2*pi*i/nw),
                  'I':2 * (i % 2) - 1}])
field = Field(wires)

def Babs(xy):
    return sc.linalg.norm(field.F(xy))
B0 = Babs((r - 0.15, 0))
doc.draw_scalar_field(func=Babs, cmap=doc.cmap_WtGnBu, vmin=0., vmax=B0)
doc.draw_contours(func=Babs, linewidth=1, linecolor='#111111',
    levels=sc.linspace(0, B0, 12)[1:-1], attributes={'opacity':'0.5'})

doc.draw_currents(field)
startpath = Startpath(field, lambda t: array((t * r * 0.9, 0)))
nlines = 7
for iline in range(nlines):
    p0 = startpath.startpos((iline + 0.5) / (nlines - 0.5))
    if iline == 2 or iline == 5:
        offs = 0.0
    else:
        offs = 0.5
    for m in range(nw):
    	line = FieldLine(field, rot(p0, 2*pi*m/nw), directions='both')
    	doc.draw_line(line, linewidth=2.4, arrows_style={'dist':1.8,
    	    'offsets':{'start':offs, 'end':1-offs} })
doc.write()

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I, the copyright holder of this work, hereby publish it under the following license:
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You are free:
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  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
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Date/TimeThumbnailDimensionsUserComment
current11:44, 12 November 2020Thumbnail for version as of 11:44, 12 November 2020600 × 600 (233 KB)Geek3 (talk | contribs)Uploaded own work with UploadWizard

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