# 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]] | + | '''Dan Sober - 20-Nov-2013''' |

− | * [[Media:B15 vs x center log.pdf]] | + | |

− | * [[Media:B15 vs x fringe lin.pdf]] | + | For guidance in mapping, here are some plots of the Tosca 1.5T field in mapping coordinates. |

− | * [[Media:B15 vs x fringe log.pdf]] | + | |

− | * [[Media:B15 vs y center lin.pdf]] | + | ===Mapping coordinates=== |

− | * [[Media:B15 vs y center log.pdf]] | + | 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]] | + | The y axis points along the long axis of the magnet. |

− | * [[Media:B15 vs y fringe log.pdf]] | + | 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] | ||

+ | |||

+ | '''Sasha Glamazdin - June-2018''' | ||

+ | |||

+ | Alternative TOSCA results for TAGGER magnet can be found in /u/group/halld/Subsystems/Tagger directory. | ||

+ | |||

+ | Directory contains TOSCA *opc and *op3 files and field map files for several magnetic fields. More details about | ||

+ | an information in the directory can be found in READ_ME file. | ||

+ | |||

+ | Directory /u/group/halld/Subsystems/Tagger/talk/ contains *pdf, *pptx files and pictures of a presentation with description of | ||

+ | TOSCA calculations of TAGGER magnet. |

## Latest revision as of 10:57, 7 June 2018

**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.

- B vs x, center, linear
- B vs x, center, log
- B vs x, fringe, linear
- B vs x, fringe, log
- B vs y, center, linear
- B vs y, center, log
- B vs y, fringe, linear
- B vs y, fringe, log

or alternately

**Sasha Glamazdin - June-2018**

Alternative TOSCA results for TAGGER magnet can be found in /u/group/halld/Subsystems/Tagger directory.

Directory contains TOSCA *opc and *op3 files and field map files for several magnetic fields. More details about an information in the directory can be found in READ_ME file.

Directory /u/group/halld/Subsystems/Tagger/talk/ contains *pdf, *pptx files and pictures of a presentation with description of TOSCA calculations of TAGGER magnet.