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Figure 5
Helical undulator design. The vertical field is produced by a current of 300 A flowing in the coils, while the horizontal field is created by pairs of permanent magnets placed on both sides of the electron beam. The vertical (horizontal) field is tuned by varying the current (gap).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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