Progress on HTS Undulator Prototype Coils for Compact FEL Designs

Compact free-electron lasers require short accelerator structures followed by high peak field and short-period undulators to produce coherent radiation up to hard X-rays. Likewise, future lepton colliders, like CLIC or FCC-ee, require high-field damping wigglers for the creation of low emittance bea...

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Bibliographic Details
Published inIEEE transactions on applied superconductivity Vol. 32; no. 4; pp. 1 - 5
Main Authors Richter, Sebastian C., Ballarino, A., Schoerling, D., Nes, T. H., Bernhard, A., Muller, A.-S.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Coherent radiation
Coils
Conductors
Copper
Damping
Emittance
Free electron lasers
High temperature superconductors
Iron
Leptons
Prototypes
superconducting devices
Superconducting magnets
Undulators
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Summary:Compact free-electron lasers require short accelerator structures followed by high peak field and short-period undulators to produce coherent radiation up to hard X-rays. Likewise, future lepton colliders, like CLIC or FCC-ee, require high-field damping wigglers for the creation of low emittance beams. The application of high-temperature superconductor (HTS) in the form of coated REBCO tape to undulators and wigglers enables higher magnetic fields and larger operating margins. This paper discusses the potential of HTS for a superconducting vertical racetrack (VR) undulator coil geometry as well as results of the development work done on a prototype coil, with a period length of 13 mm, wound from coated REBCO tape conductor. Design and assembly aspects as well as first results from powering tests at 77 K are presented and discussed.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2022.3150288