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Figure 3
Trajectories of the U-49 undulator at various gaps. The upstream endpole is compensated over the entire gap range with compensation currents of | I | ≤ 64 amp-turns. The coil of the downstream endpole is not powered. Gap = (a) 15, (b) 17, (c) 20, (d) 24, (e) 30, ( f ) 38 and (g) 50 mm.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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