A $\hbox{Nb}_{3}\hbox{Sn}$-Based, Model Superconducting Helical Undulator Fabricated Using a Wind and React Process

Majoroš, M.; Sumption, M.D.; Susner, Michael A.; Bhartiya, S.; Mahmud, Mohd Izwan; Collings, E. W.; Tomsic, M.; Rindfleisch, M.; Phillips, J. L.; Lyons, D. H.; Yue, J.

doi:10.1109/tasc.2010.2041638

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…This is a significant achievement, especially for a tube-type wire. The performance of the present undulator was significantly better than that made of fusion-type internal-Sn strand reported in our previous work [16], which performed significantly below the anticipated field specification. Our previous undulator was degraded either because of strand instability, mechanical instability, or both.…”

Section: Discussioncontrasting

confidence: 73%

“…Our previous undulator was degraded either because of strand instability, mechanical instability, or both. Our present undulator emerged after measurement with no obvious cracking, unlike the previous example [16]. Using a different epoxy, together with improved aluminum oxide flame spray of the undulator former led to much lower levels of epoxy cracking.…”

Section: Discussionmentioning

confidence: 44%

“…The relatively small bore of the model undulator coil (8 mm) required us to use a Nb 3 Sn strand which would be robust, behaving well under the complicated end winding patterns of the helical undulator, and which would also be stable at low fields. For these reasons we chose a tube-type Nb 3 Sn strand with 217 filaments, unlike the fusion-type strand used in our previous work [16]. The cross section of the strand is shown in figure 1 and its parameters are reported in table 1.…”

Section: Strand Selection Undulator Design and Fem Based Field Modelingmentioning

confidence: 99%

“…In the present paper we attempted to use a better performance wire while still keeping the undulator period at ∼14 mm. A 14 mm Fe-cored helical undulator with a bore tube outside diameter of 8 mm has been previously constructed and tested by our group [16]. Selected for its winding was a modified 'fusion-type' restacked-rod internal-Sn strand.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb₃Sn wire

Majoroš

Sumption

Susner

et al. 2012

Supercond. Sci. Technol.

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A model helical undulator 250 mm in length, designed and fabricated with a period of 14 mm, was tested in a liquid helium bath. The helical coil was wound with a multifilamentary, tube-type Nb 3 Sn strand with 217 sub-elements. The coil I c and the magnetic field in the bore were measured at 4.2 K in a liquid helium bath using a Hall probe. I c was found to be 842 A, and the bore field reached the design specification of 0.8 T. The transverse bore field was also measured as a function of position along the length of the undulator axis and was seen to exhibit the expected sinusoidal behavior. The measured I c was compared with that obtained from a crossing of a load line (determined from FEM modeling) with the I c (B) curve of a short sample Nb 3 Sn strand. The coil exhibited the same critical current as the short sample.

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Section: Discussioncontrasting

confidence: 73%

Section: Discussionmentioning

confidence: 44%

Section: Strand Selection Undulator Design and Fem Based Field Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb₃Sn wire

Majoroš

Sumption

Susner

et al. 2012

Supercond. Sci. Technol.

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“…A short Nb 3 Sn helical SCU14 model with return-peg design, as shown in figure 3, was first constructed by Kim et al in 2007 for the ILC positron source project; it is based on the wind-and-react technology and reached an on-axis field B 0 of 0.9 T at 7.94 mm magnetic bore after training quenches [21]. With similar configuration, Majoros et al fabricated another two short models: one reached a low B 0 of 0.314 T due to unexpected flux jumps and the other reached an enhanced B 0 of 0.8 T by using small-filament Nb 3 Sn wires [22,23].…”

Section: Nb 3 Sn Helicalmentioning

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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Design of ${\rm Nb}_{3}{\rm Sn}$-Based Short Period Model Superconducting Helical Undulator

Majoroš

Sumption

Collings

et al. 2011

IEEE Trans. Appl. Supercond.

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Superconducting undulators are being constructed to satisfy an increasing need within the synchrotron radiation community for higher and higher energy photon beams. The paper focuses attention on the design of a helical undulator for the ILC photon (hence positron) source. Finite element method (FEM) modeling was performed to extend the design of our existing 14 mm period undulator design to shorter periods with a view towards the final design, construction and testing of a 10 mm undulator. To launch this task we modeled the properties of 10 mm period undulators formed around bore tubes of the 6 mm and 8 mm OD with winding-pack cross-sections of 3 mm 6 mm and 3 mm 11 mm. These windings do allow a pole width of 2 mm and can take advantage of the corresponding about 0.2 T field increment due to it. In order to reach the target bore field of 1.1 T it is necessary to either reduce the bore size and tighten the associated tolerances, or to use a higher performing strand. In the present work we have chosen to optimize the undulator design basing it on the properties of an advanced tube-type strand keeping the bore tube diameter at 6-8 mm in order to see the needed performance to meet this undulator specification.

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A $\hbox{Nb}_{3}\hbox{Sn}$-Based, Model Superconducting Helical Undulator Fabricated Using a Wind and React Process

Cited by 3 publications

References 7 publications

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb₃Sn wire

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb₃Sn wire

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

Design of ${\rm Nb}_{3}{\rm Sn}$-Based Short Period Model Superconducting Helical Undulator

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A $\hbox{Nb}_{3}\hbox{Sn}$-Based, Model Superconducting Helical Undulator Fabricated Using a Wind and React Process

Cited by 3 publications

References 7 publications

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb3Sn wire

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb3Sn wire

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

Design of ${\rm Nb}_{3}{\rm Sn}$-Based Short Period Model Superconducting Helical Undulator

Contact Info

Product

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A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb₃Sn wire

A model superconducting helical undulator fabricated using a small filament, tube-type, multifilamentary Nb₃Sn wire