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Bending Radius Limits of Different Coated REBCO Conductor Tapes - an Experimental Investigation With Regard to HTS Undulators


Sebastian C. Richter, Daniel Schörling, Axel Bernhard, Antje Drechsler, Anke-Susanne Müller, Bernd Ringsdorf, Sonja Schlachter

Beteiligtes Institut

Institut für Beschleunigerphysik und Technologie (IBPT)
Laboratorium für Applikationen der Synchrotronstrahlung (LAS)
Fakultät für Physik (PHYSIK)


Beiträge rund ums KIT


Compact FELs require short-period, high-field undulators in combination with
compact accelerator structures to produce coherent light up to X-rays.
Likewise, for the production of low emittance positron beams for future lepton
colliders, like CLIC or FCC-ee, high-field damping wigglers are required.
Applying high-temperature superconductors in form of coated REBCO tape
conductors allows reaching higher magnetic fields and larger operating
margins as compared to low-temperature superconductors like Nb-Ti or
Nb3Sn. However, short undulator periods like 13 mm may require bending
radii of the conductor smaller than 5 mm inducing significant bending strain
on the superconducting layer and may harm its conducting properties. In this
paper, we present our designed bending rig and experimental results for
REBCO tape conductors from various manufacturers and with different
properties. Investigated bending radii reach from 20 mm down to 1 mm and
optionally include half of a helical twist. To represent magnet winding
procedures, the samples were bent at room temperature and then cooled
down to T = 77 K in the bent state to test for potential degradation of the
superconducting properties.



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Creative Commons Namensnennung 4.0 International

Auflösung 1280 x 720 Pixel
Seitenverhältnis 16:9
Audiobitrate 123915 bps
Audio Kanäle 1
Audio Codec aac
Audio Abtastrate 48000 Hz
Gesamtbitrate 969236 kbps
Farbraum yuv420p
Container mov,mp4,m4a,3gp,3g2,mj2
Medientyp video/mp4
Dauer 297 s
Dateiname DIVA-2021-284_hd.mp4
Dateigröße 35.982.909 byte
Bildwiederholfrequenz 25
Videobitrate 839214 kbps
Video Codec h264