Design studies on superconducting Cos θ magnets for a fast pulsed synchrotron

Wilson, M.N.; Moritz, G.; Anerella, M.; Ganetis, G.; Ghosh, A.; Hassenzahl, W.V.; Jain, A.; Joshi, Raghavendra; Kaugerts, J.; Muehle, C.; Muratore, J.; Thomas, R.; Walter, G.; Wanderer, P.

doi:10.1109/tasc.2002.1018408

Cited by 15 publications

(4 citation statements)

References 2 publications

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“…For the purpose of steady-state cooling some designs incorporate helium channels in the insulation covering the thin edge, see figure 7.15 [110]. The increased helium surface combined with the enhanced flow of supercritical helium improves the overall cooling of the cable.…”

Section: Local Removal Of the Insulation At The Thin Edgementioning

confidence: 99%

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Stability of superconducting Rutherford cables for accelerator magnets

Willering

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f c e e r g s o r a c l r a t o m a n e t Gerard Willering S t a b i l i t y o f S u p e r c o n d u c t i n g r C b l e R u t h e f o r d a s PrefaceThe work described in this thesis results from an extensive collaboration between the special chair for Industrial Application of Superconductors in the Low Temperature Division at the University of Twente and the Magnets, Superconductors and Cryostats group at CERN. The research has been carried out at CERN as well as at the University of Twente and it is funded by both institutes. Part of the cable samples were prepared by GSI in the frame of research collaboration on cable stability.I am very grateful to the members of these groups for giving me the opportunity to perform the research, for their interest and useful discussions.i ContentsPreface i Chapter 1 IntroductionAfter the discovery of superconductivity in the beginning of the 20 th century the understanding of the phenomenon has grown. Practical conductors are produced for various magnet applications. Although the number of superconducting materials is high, only a few can be used in high-field and high-current density applications. This thesis deals with cable stability, with the focus on application in accelerator magnets.In this chapter a brief overview of the existing and near future accelerators and their superconducting magnets is presented. The most recent superconducting accelerator, the lhc and the near future superconducting accelerator sis 300 are described.The phenomenon of superconductivity is shortly discussed and practical superconductors are introduced with an emphasis on strands and cables. Different types of cables are presented and the relevance of this thesis for in particular the Rutherford type of cable is discussed.The terms quench and recovery are introduced. The importance of research on stability is illustrated by the large number of training quenches in the lhc main dipole magnets. Superconducting accelerator magnetsIn High Energy Physics the interaction of elementary particles is being studied. Many particle accelerators have been constructed to accelerate particles and collide them at high energy. Synchrotron accelerators provide a circular track with RFcavities to accelerate bunches of particles each cycle.Synchrotron accelerators require dipole magnets to bend the particle beam and keep it in its circular track. Quadrupole magnets are used to focus and defocus the beam and higher-order magnets correct field distortions and chromaticity. The collision energy depends on the magnetic field in the aperture of the dipole B a (T) and the bending radius of the dipole magnets r d (km) following E ≈ 0.3B a r d (TeV). The limitation in the track circumference is strongly dictated by the amount of material and the costs involved. In normal conducting magnets iron is applied to enhance the electromagnetic field produced with copper windings. The magnetic field in iron saturates at about 2 T, therefore the needed amount of copper windings and the costs involved increase strongly for hig...

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Section: Local Removal Of the Insulation At The Thin Edgementioning

confidence: 99%

“…Since helium cooling improves also the transient stability, the effect of helium slots is investigated. Figure 7.15: Photograph of helium slots at the thin edge of a cable from [110].…”

Section: Local Removal Of the Insulation At The Thin Edgementioning

confidence: 99%

Stability of superconducting Rutherford cables for accelerator magnets

Willering

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“…This creates AC losses under continuous operation while running the magnet up and down, based on the cycle shown in Fig 5. The losses in the CICC should be minimized by appropriate selection of conductor, while the magnet conductor cooling needs to be capable of extracting the heat loads during operation. The AC loss components are calculated based on the Wilson model [4], [5] operating at the parameters indicated in Table II [13]- [15]. The losses in the stainless steel (SS) foil and in the Copper-Nickel (CuNi) outer sheet have not been considered for the analysis here as the SS & CuNi have high electrical resistivity, and AC loss in the NbTi is considerably more prominent.…”

Section: A Ac Lossesmentioning

confidence: 99%

Preliminary Design Study of a Fast-Ramping Magnet for Preconcept Design of an Electron–Ion Collider at Jefferson Lab

Ghoshal

Chavez

Fair

et al. 2020

IEEE Trans. Appl. Supercond.

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The Jefferson Lab Electron Ion Collider (JLEIC) is a proposed new machine for nuclear physics research. The all new ion accelerator and collider complex will consist of two collider rings with a unique figure-of-eight layout to deliver a high degree of polarization in both beams. As part of the pre-concept design for the Ion ring, a 3-Tesla Super-Ferric dipole magnet was proposed utilizing a superconducting Cable-in-Conduit-Conductor (CICC) design to wind the coils which will be built by Texas A&M University. A first mechanical model of the winding for the 3T-SF-CICC dipole was built to validate that the winding structure provides the conductor geometry required to provide collider field homogeneity over large aperture. A rapid-cycling Booster synchrotron is required to inject 8 GeV beams to the Ion Ring. The Booster requires arc dipoles with the same field and aperture as those of the Ion Ring. Due to the design of the CICC with respect to the amount of stabilizer and the internal cooling mechanism employed, temperature rise of the coils during a quench event is much more rapid than for more conventional magnets. It is thus imperative that the magnet's stored energy is dissipated externally to the windings to avoid overheating the CICC and to provide adequate protection during a quench. This paper presents a preliminary design study, including AC effects inside the coils and associated risks with the aim of providing guidance for the design of the full protection system for such a magnet.

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“…The magnets in development for the needs of SIS100 at GSI could be of interest for that application [10]. Indeed, the key technological item for such a synchrotron will be a fast pulsing SC dipole reaching a 4 to 6 Tesla field in a 2 to 3 second ramp [10][11][12][13][14][15][16]. The new process of multi-turn ejection which minimizes beam loss should be used.…”

Section: Psmentioning

confidence: 99%

Plans for the future of proton accelerators at CERN

Garoby¹,

Scandale²

2005

Nuclear Physics B - Proceedings Supplements

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The Large Hadron Collider, presently in construction at CERN, will be filled through a set of high performance proton accelerators providing the high brightness beam needed to reach the foreseen luminosity. Although this difficult project has top priority and uses most of the CERN resources, it is nevertheless time investigating improvements of the proton accelerator complex for physical cases beyond the LHC expectations. The needs of multiple physics communities have to be taken into account, as well as the necessity of consolidating the installations while keeping high reliability. This paper starts from the analysis and proposals made by the "High Intensity Proton" (HIP) working group [1, 2] to improve the performances of the PS and the SPS complex and better match the users requests in a staged scenario at short and medium term, and complement it, addressing the main possibilities beyond that horizon. PLANS FOR THE FUTURE OF PROTON ACCELERATORS AT CERNR. Garoby, W. Scandale, CERN, Geneva, Switzerland AbstractThe Large Hadron Collider, presently in construction at CERN, will be filled through a set of high performance proton accelerators providing the high brightness beam needed to reach the foreseen luminosity. Although this difficult project has top priority and uses most of the CERN resources, it is nevertheless time investigating improvements of the proton accelerator complex for physical cases beyond the LHC expectations. The needs of multiple physics communities have to be taken into account, as well as the necessity of consolidating the installations while keeping high reliability. This paper starts from the analysis and proposals made by the "High Intensity Proton" (HIP) working group [1, 2] to improve the performances of the PS and the SPS complex and better match the users requests in a staged scenario at short and medium term, and complement it, addressing the main possibilities beyond that horizon.

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Design studies on superconducting Cos θ magnets for a fast pulsed synchrotron

Cited by 15 publications

References 2 publications

Stability of superconducting Rutherford cables for accelerator magnets

Stability of superconducting Rutherford cables for accelerator magnets

Preliminary Design Study of a Fast-Ramping Magnet for Preconcept Design of an Electron–Ion Collider at Jefferson Lab

Plans for the future of proton accelerators at CERN

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