Field quality of 1.5 m long conduction cooled superconducting undulator coils with 20 mm period length

S Casalbuoni,Th A Gerhard,A W Grau,M Turenne,D Saez De Jauregui,W Walter,N Glamann,T Holubek,C Boffo

doi:10.1088/1742-6596/874/1/012015

S Casalbuoni, Th A Gerhard + Show 7 more

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https://doi.org/10.1088/1742-6596/874/1/012015

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Abstract

The Institute for Beam Physics and Technology (IBPT) at the Karlsruhe Institute of Technology (KIT) and the industrial partner Babcock Noell GmbH (BNG) are collaborating since 2007 on the development of superconducting undulators both for ANKA and low emittance light sources. The first full length device with 15 mm period length has been successfully tested in the ANKA storage ring for one year. The next superconducting undulator has 20 mm period length (SCU20) and is also planned to be installed in the accelerator test facility and synchrotron light source ANKA. The SCU20 1.5 m long coils have been characterized in a conduction cooled horizontal test facility developed at KIT IBPT. Here we present the local magnetic field and field integral measurements, as well as their analysis including the expected photon spectrum.

Highlights

Superconducting undulators can produce, with respect to permanent magnet ones, a higher peak field on axis for the same vacuum gap and period length, allowing to increase the brilliance and the tunability of the photon spectrum
The roll off obtained from the local magnetic field measurements at different currents in the main coils and in the correction coils to minimize the vertical field integrals is below 0.5% at higher currents and it increases up to 0.7-0.8 % at lower currents
The flux calculated from the measured field of the superconducting undulator has 20 mm period length (SCU20) is compared to the flux of SCU20 with an ideal field

Summary

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This content has been downloaded from IOPscience. Ser. 874 012015 (http://iopscience.iop.org/1742-6596/874/1/012015) View the table of contents for this issue, or go to the journal homepage for more. You may be interested in: Status of the development of superconducting undulators at ANKA S Casalbuoni, T Baumbach, S Gerstl et al The CAT-ACT Beamline at ANKA: A new high energy X-ray spectroscopy facility for CATalysis and ACTinide research A Zimina, K Dardenne, M A Denecke et al Radiation of the magneto-crystalline undulator V Epp and V V Kaplin Design of a REBCO thin film superconducting undulator I Kesgin, C L Doose, M T Kasa et al Short Period Undulators for Storage Rings and Free Electron Lasers J Bahrdt and Y Ivanyushenkov Radiation from relativistic electrons in "light" and in conventional undulators. De Matteis et al Development of a quasi-periodic undulator for the HLS Yang Yu-Feng, Lu Hui-Hua, Chen Wan et al.8th International Particle Accelerator Conference IOP Conf. S Casalbuoni, N Glamann, A W Grau, T Holubek, D Saez de Jauregui, C Boffo, Th A Gerhard, M Turenne, W Walter

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