Difference between revisions of "Solenoid Mapping Results: Aug. 4, 2013"
From GlueXWiki
| Line 7: | Line 7: | ||
The existence of holes in the iron of the magnet raise the possibility that the azimuthal symmetry of the field may be broken at a level that will require corrections in the data analysis. Lines were mapped parallel to the magnet axis at different φ locations to check the degree of this effect. Here are some plots showing comparisons of measured values at different φ locations. Each plot was at a different radius from magnet center and differences were taken relative to the measurements done at φ=90<sup>o</sup>. | The existence of holes in the iron of the magnet raise the possibility that the azimuthal symmetry of the field may be broken at a level that will require corrections in the data analysis. Lines were mapped parallel to the magnet axis at different φ locations to check the degree of this effect. Here are some plots showing comparisons of measured values at different φ locations. Each plot was at a different radius from magnet center and differences were taken relative to the measurements done at φ=90<sup>o</sup>. | ||
| − | [[File:bfield_compare_map_to_map_diff_R12.png| | + | [[File:bfield_compare_map_to_map_diff_R12.png|300px|caption]] |
R=12" | R=12" | ||
| − | [[File:bfield_compare_map_to_map_diff_R22.png| | + | [[File:bfield_compare_map_to_map_diff_R22.png|300px|caption]] |
R=22" | R=22" | ||
| − | [[File:bfield_compare_map_to_map_diff_R32.png| | + | [[File:bfield_compare_map_to_map_diff_R32.png|300px|caption]] |
| + | R=32" | ||
| + | |||
| + | <hr> | ||
| + | The relative difference in percent is shown in the following plots | ||
| + | |||
| + | [[File:bfield_compare_map_to_map_diff_rel_R12.png|300px|caption]] | ||
| + | R=12" | ||
| + | |||
| + | |||
| + | [[File:bfield_compare_map_to_map_diff_rel_R22.png|300px|caption]] | ||
| + | R=22" | ||
| + | |||
| + | |||
| + | [[File:bfield_compare_map_to_map_diff_rel_R32.png|300px|caption]] | ||
R=32" | R=32" | ||
Revision as of 00:25, 4 August 2013
Mapping of the GlueX solenoid magnetic field took place July 31, 2013 to Aug. 4, 2013. Files are located here:
/group/halld-online/Solenoid_Mapping
φ dependence of field
The existence of holes in the iron of the magnet raise the possibility that the azimuthal symmetry of the field may be broken at a level that will require corrections in the data analysis. Lines were mapped parallel to the magnet axis at different φ locations to check the degree of this effect. Here are some plots showing comparisons of measured values at different φ locations. Each plot was at a different radius from magnet center and differences were taken relative to the measurements done at φ=90o.
R=12"
R=22"
R=32"
The relative difference in percent is shown in the following plots
R=12"
R=22"
R=32"
