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Figure 2
Typical Compton spectra for BESSY I electron energies around 340, 800 and 850 MeV used for special PTB operation of the storage ring. The upper drawings show the background spectra taken with the laser switched off. Only the lines from the calibration source and bremsstrahlung background are visible. The spectra in the middle are obtained with the laser switched on. The bottom spectra are the difference between the spectra in the upper and middle rows. The sharp cut-off of the spectra at the high-energy side can be clearly seen. From the energy position of this cut-off the electron energy can then be calculated. The acquisition time was 15 min for each spectrum, the angular acceptance of the collimator was 0.72 mrad.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 3| May 1998| Pages 392-394
https://doi.org/10.1107/S090904959701532X
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