Bahrdt, J.; Bäcker, H.-J.; Bakos, J.; Bieder, H.-J.; Frentrup, W.; Gaupp, A.; Gottschlich, S.; Kuhn, C.; Rethfeldt, C.; Scheer, M.; Schulz, B.: First Results from Two Novel In-vacuum Magnetic Field Measurement Devices as Built at HZB. In: Christine Petit-Jean-Genaz ... [Ed.] : IPAC 2016, Proceedings of the 7th International Particle Accelerator Conference, Busan, Korea . JACoW, 2016. - ISBN 978-3-95450-147-2, p. THPOW038/1-3=4028-4030
http://accelconf.web.cern.ch/AccelConf/ipac2016/papers/thpow038.pdf
Open Accesn Version

Abstract:
The characterization of cryogenic in vacuum permanent magnet undulators with periods less than 20 mm and correspondingly narrow gaps requires new in-vacuum measurement systems. The positioning accuracy of the HZB in-vacuum Hallprobe bench has substantially been improved (a few μm) with appropriate feedback systems. A new in-vacuum cable tray has been developed. Another system for field integral measurements, an in-vacuum moving wire, is under commissioning. Both devices are presented.