Full Size Model Magnets for the FAIR SIS100 Synchrotron

Fischer, Egbert; Khodzhibagiyan, Hamlet; Kovalenko, A. D.

doi:10.1109/tasc.2008.922261

Cited by 18 publications

(23 citation statements)

References 8 publications

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“…Finally the packages were compressed to one magnet half yoke to reach a packing factor of 99.5%. The field quality was found in good agreement with the calculations [4] and the losses match the ones based on experiments with modified Nuclotron magnets [7]. …”

Section: Magnet Productionsupporting

confidence: 83%

“…For ramp rates close to the nominal ramp rateḂ = 4 T /s as well as for maximum fields close to the nominal B max = 2 T the dissipated power was larger than the maximum cooling power, which is limited by the maximum pressure of ≈ 2.5 bar for the two phase helium flow and by the hydraulic resistance of the magnet's coil. It was found to be close to 45 W and thus in good agreement with the predictions [7]. So delays were added for cycles above this limit (even for the requested originally most intensive cycle "2c" [10]).…”

Section: Ac Loss Analysissupporting

confidence: 67%

“…The AC losses of the magnet were measured and were found to be as predicted by FEM calculations [2,3] and by extrapolations from model magnet measurements [7]. The model magnets were built using anisotropic iron.…”

Section: Resultsmentioning

confidence: 99%

“…Based on our previous R&D on high current Nuclotron type cables experimentally tested in short model dipoles and quadrupoles [11,12] a single layer coil with only 8 turns and an increased tube diameter was investigated providing 4 times the cooling power of the current models [7,1]. The higher cooling limits allow to use the space of the former inner coil layer to enlarge the dipole aperture for an increased field quality and for a stable vacuum chamber design (see FIGURE 5).…”

Section: Design Improvementsmentioning

confidence: 99%

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Thermodynamic Properties of Fast Ramped Superconducting Accelerator Magnets for the Fair Project

Fischer

Mierau

Schnizer

et al. 2010

AIP Conference Proceedings

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Section: Magnet Productionsupporting

confidence: 83%

Section: Ac Loss Analysissupporting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

Section: Design Improvementsmentioning

confidence: 99%

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Thermodynamic Properties of Fast Ramped Superconducting Accelerator Magnets for the Fair Project

Fischer

Mierau

Schnizer

et al. 2010

AIP Conference Proceedings

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“…The sis 100 dipoles are ramped at about 4 T/s to a field of 1.9 T and with a cycle time of about 1 s [2,3]. The sis 300 dipoles are ramped at about 1 T/s to a field of 4.5 T, with a cycle time of about 20 s [3].…”

Section: Superconducting Accelerator Magnetsmentioning

confidence: 99%

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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Accelerator Engineering and Technology: Accelerator Technology

Bordry

Bottura

Milanese

et al. 2020

Particle Physics Reference Library

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Magnets are at the core of both circular and linear accelerators. The main function of a magnet is to guide the charged particle beam by virtue of the Lorentz force, given by the following expression: F = q v × B, (8.1) where q is the electrical charge of the particle, v its velocity, and B the magnetic field induction. The trajectory of a particle in the field depends hence on the particle Coordinated by F. Bordry

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Full Size Model Magnets for the FAIR SIS100 Synchrotron

Cited by 18 publications

References 8 publications

Thermodynamic Properties of Fast Ramped Superconducting Accelerator Magnets for the Fair Project

Thermodynamic Properties of Fast Ramped Superconducting Accelerator Magnets for the Fair Project

Stability of superconducting Rutherford cables for accelerator magnets

Accelerator Engineering and Technology: Accelerator Technology

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