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Figure 3
Upper part: electron steering at the end of the undulator (first field integral on the undulator axis; the electron energy was taken to be 1.7 GeV) for different magnetic fields of the undulator in the normal mode of operation. Lower part: the electron displacement at the end of the undulator (second field integral on the undulator axis; the electron energy was taken to be 1.7 GeV). The asterisks refer to the case that the magnetic field is changed from higher to lower values, the diamonds, to the case that the magnetic field is changed from lower to higher values. The error bars on the left show the accuracy of the magnetic field measurement: ±0.5 G m for the first integral (upper part) and ±2 G m2 for the second integral (lower part).

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SYNCHROTRON
RADIATION
ISSN: 1600-5775
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