Short-Period Superconducting Undulator Coils With Neutral Poles: Test Results

Bragin, A.V.; Zorin, A. V.; Khruschev, S. V.; Lev, V.; Mezentsev, N. A.; Shkaruba, V. A.; Syrovatin, V. M.; Тарасенко, О. А.; Tsukanov, V. M.; Volkov, A. A.

doi:10.1109/tasc.2018.2805162

Cited by 10 publications

(1 citation statement)

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“…In 2016, Mezentsev et al for the first time reported the development of a 15-period HR NbTi planar SCU15.6 model with active/neutral poles and experimentally demonstrated that the prototype could reach an on-axis field B 0 of 1.2 T at 8 m magnetic gap [86]. In 2017, Bragin et al reported the development of a 40-period SCU15.6 prototype and experimentally demonstrated that an on-axis field B 0 of 1.2 T could be obtained after training quenches and the RMS phase error was ∼3.5 • -4 • [87]. In 2021, BINP reported the latest test of a 119-period SCU15.6 model, as shown in figure 9; this 2 m long model also reached an on-axis field B 0 of 1.2 T after one thermal cycle and training quenches [88].…”

Section: Vr Rebco Planarmentioning

confidence: 99%

Review and prospects of world-wide superconducting undulator development for synchrotrons and FELs

Zhang

Calvi²

2022

Supercond. Sci. Technol.

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Superconducting undulators (SCUs) with period >15 mm can offer much higher on-axis undulator field B0 than state-of-the-art cryogenic permanent magnet undulators (CPMUs) with the same period and vacuum gap. The commissioned NbTi planar SCUs for user operation in the Karlsruhe Institute of Technology (KIT) synchrotron and the Advanced Photon Source (APS) storage ring are operated stably without quenches, producing outperformed photon flux in the high energy part of the hard X-ray spectrum. Another potential advantage of deploying SCU is its radiation hardness, a crucial characteristic for being used in free electron lasers (FELs) driven by high repetition rate superconducting linear accelerators (LINACs) and diffraction limited storage rings (DLSRs) with small vacuum gap and large averaged beam current. Development of shorter period but high field SCU is an important mission in an EU founded CompactLight project as this technology would reduce both the length of undulators and the length of LINACs. This review paper first overviews the research and development of SCUs worldwide from late 1970s to 2021, then presents the SCU design requirements and compares the theory limits of different types of planar and helical SCUs, and finally reviews the technical challenges including the SCU cryostat, the magnetic field measurement, the integral/local field correction and the high-temperature superconductor (HTS) challenges and prospects the research needs for SCUs.

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Section: Vr Rebco Planarmentioning

confidence: 99%