Difference between revisions of "TOSCA field plots of the tagger dipole in mapping coordinates"

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* [[Media:B15 vs x center lin.pdf| x, center, linear]]
+
'''Dan Sober - 20-Nov-2013'''
* [[Media:B15 vs x center log.pdf| x, center, log]]
+
 
* [[Media:B15 vs x fringe lin.pdf| x, fringe, linear]]
+
For guidance in mapping, here are some plots of the Tosca 1.5T field in mapping coordinates.
* [[Media:B15 vs x fringe log.pdf| x, fringe, log]]
+
 
* [[Media:B15 vs y center lin.pdf| y, center, linear]]
+
===Mapping coordinates===
* [[Media:B15 vs y center log.pdf| y, center, log]]
+
The origin (0,0,0) is the geometric center of the magnetic poles, located in the middle of the gap.
* [[Media:B15 vs y fringe lin.pdf| y, fringe, linear]]
+
The y axis points along the long axis of the magnet.
* [[Media:B15 vs y fringe log.pdf| y, fringe, log]]
+
The field is nearly uniform from y = -305 cm to 305 cm.
 +
The "effective field boundary" is at about y = -311.6 and 311.6 cm.
 +
The calculated field is symmetric about y=0, so only positive y values are plotted.
 +
The x axis points along the short axis of the magnet in the bend plane, with x increasing in the direction that incident electrons bend in the field.
 +
The field is nearly uniform from about x = -15 cm to +15 cm.
 +
The "effective field boundary" is at about x = 20.5 cm.
 +
 
 +
===Plots===
 +
I have used Gnuplot's default sequence of colors for the lines, not all of which are easily visible, so I have added some labels near the curves.
 +
The plots vs x in the central region are all nearly identical except in the 20 Gauss region on the log plot, which is why no labels were added.
 +
 
 +
* [[Media:B15 vs x center lin.pdf|B vs x, center, linear]]
 +
* [[Media:B15 vs x center log.pdf|B vs x, center, log]]
 +
* [[Media:B15 vs x fringe lin.pdf|B vs x, fringe, linear]]
 +
* [[Media:B15 vs x fringe log.pdf|B vs x, fringe, log]]
 +
* [[Media:B15 vs y center lin.pdf|B vs y, center, linear]]
 +
* [[Media:B15 vs y center log.pdf|B vs y, center, log]]
 +
* [[Media:B15 vs y fringe lin.pdf|B vs y, fringe, linear]]
 +
* [[Media:B15 vs y fringe log.pdf|B vs y, fringe, log]]
  
 
or alternately
 
or alternately
  
 
* [http://faculty.cua.edu/sober/HallD/Tosca_plots_map_coords.html link to Dan Sober's Tosca plots]
 
* [http://faculty.cua.edu/sober/HallD/Tosca_plots_map_coords.html link to Dan Sober's Tosca plots]

Revision as of 07:52, 25 November 2013

Dan Sober - 20-Nov-2013

For guidance in mapping, here are some plots of the Tosca 1.5T field in mapping coordinates.

Mapping coordinates

The origin (0,0,0) is the geometric center of the magnetic poles, located in the middle of the gap. The y axis points along the long axis of the magnet. The field is nearly uniform from y = -305 cm to 305 cm. The "effective field boundary" is at about y = -311.6 and 311.6 cm. The calculated field is symmetric about y=0, so only positive y values are plotted. The x axis points along the short axis of the magnet in the bend plane, with x increasing in the direction that incident electrons bend in the field. The field is nearly uniform from about x = -15 cm to +15 cm. The "effective field boundary" is at about x = 20.5 cm.

Plots

I have used Gnuplot's default sequence of colors for the lines, not all of which are easily visible, so I have added some labels near the curves. The plots vs x in the central region are all nearly identical except in the 20 Gauss region on the log plot, which is why no labels were added.

or alternately