New Results on Minimizing AC Power Losses in a Fast Cycling 2 T Superferric Dipole With a Cold Yoke

Kovalenko, A. D.; Agapov, N.N.; Fischer, Egbert; Khodzhibagiyan, Hamlet; Kuznetsov, G.; Moritz, G.; Smirnov, Alexander V.

doi:10.1109/tasc.2006.873341

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…During an intensive R&D phase the magnets field quality was optimized and the dynamic heat losses were considerably reduced in comparison to the original Nuclotron magnets (Kovalenko et al (2006)). The losses were experimentally measured on short models and on full size prototypes.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Properties of the Superconducting Dipole Magnet of the SIS100 Synchrotron

et al. 2015

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The Heavy Ion Synchrotron SIS100 is the core facility of the international FAIR project at GSI in Darmstadt. The magnet system of the synchrotron will operate with a high cycle frequency up to 1 Hz. The magnet coils are made of a hollow NbTi composite cable cooled by forced flow of two phase helium. The dynamic heat losses in the magnets caused by fast ramping provide the major part of the heat load to the cryogenic system of SIS100. Recently the first series dipole magnet was produced and is being intensively tested at the cryogenic magnet test facility at GSI. We present the status of these tests together with the obtained operation characteristics like a cool down and training behaviour, dynamic heat release and mass flow rates. c 2014 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the organizing committee of ICEC 25-ICMC 2014.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic Properties of the Superconducting Dipole Magnet of the SIS100 Synchrotron

et al. 2015

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“…Figure 4 illustrates the successive reductions of the heat release. The main structural changes giving the required result consisted of replacing the ferromagnetic truss holding the yoke with a nonmagnetic one, decreasing the area of the front parts of the winding, modification of the front parts of the dipole yoke, replacing the superconducting wire with 6 μm in diameter niobium-titanium filament by a wire with filament diameter ~4.2 μm, and some others [16][17][18].…”

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Nuclotron superconducting magnets and their improvement for use in the SIS100 heavy-ion synchrotron in the fair project

Kovalenko¹,

Kekelidze²,

Trubnikov³

et al. 2012

At Energy

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At the beginning of the 1970s, the stage of development and assimilation of magnetic and accelerator technologies based on superconductivity started in the leading scientific centers in world which were studying the fundamental problems of nuclear physics and the structure of matter. Superconductivity for developing magnets for the proton synchrotron with field amplitude much greater than the limit for ordinary magnets (B~ 2 T) was harnessed at Fermi Lab (Batavia, USA). The magnetic system of the Tevatron with field amplitude in the working aperture to 4.7 T, placed inside the synchrotron tunnel at energy 500 GeV, made it possible to double the energy of the accelerator. The field in the Tevatron magnets is formed by a multi-turn winding, fabricated on precision equipment. The accuracy of its geometric dimensions determines the quality of the magnetic field in the aperture. Superconducting magnets of this type in their modern form were used in the designs of other accelerators and were termed cos θ magnets. The magnets are cooled successively; the cool-down time of the magnetic system to the working temperature is weeks.A precision cos θ magnet, cryostat with a vessel for liquid helium, heat screen, vacuum jacket, and anchoring of the magnet are integral parts of an extremely labor-intensive, metal-intensive, and expensive cryogenic-magnetic system. Magnets of a new type [3] were developed in the High-Energy Laboratory at the Joint Institute for Nuclear Research (OIYaI) to considerably simplify and reduce the cost of the construction of the superconducting magnet and its cryostating system for the Nuclotron -a specialized synchrotron for relativistic nuclei [1, 2]. Their fundamental difference lay in the use of a magnetic with a window-frame cross-sectional geometry instead of the cos θ precision magnet and a specially developed tubular superconducting cable, intended for pulsed magnets with rapid ramping of the field, instead of the flat superconducting Rutherford cable. In the case of tubular cable, as opposed to Rutherford cable, there is no coil or frame electric insulation in the path of heat flow from the superconductor to the helium; this improves considerably the conditions for cryostating of the superconductor. In addition, the use of two-phase helium as the cryogenic coolant makes the conditions for cooling the superconductor in the tubular cable of the pulsed magnets of the accelerator unique, making it possible to operate with record high field ramping 4 T/sec and higher [4]. On the whole, the concept adopted made it possible to minimize the transverse cross section of the Nuclotron magnet, eliminate the helium vessel inside the cryostat, secure an operating regime with field rise and fall rate 4 T/sec, economize on materials and power supply, simplify the external infrastructure, and most importantly organize the fabrication and testing of the magnets on the basis of the production capacity of OIYaI.OIYaI Nuclotron -SIS100 Prototype. The development of the Nuclotron, a superconducting, strongly focus...

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“…The main feature of the magnet is the use of a cryostated coil in a warm iron yoke, which should yield overall cryogenic loss below 5 W/m of magnet [3]. This is a factor approximately 3 smaller than the present GSI SIS-100 design that we take as a benchmark [4].…”

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Strand and Cable R&D for Fast Cycled Magnets at CERN

Bottura

Bonasia

Borgnolutti

et al. 2011

IEEE Trans. Appl. Supercond.

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Abstract-Fast cycled superconducting magnets (FCM's) are an option of interest for the long-term consolidation and upgrade plan of the LHC accelerator complex. In the past two years we have conducted an R&D targeted at investigating the feasibility, operational issues and economical advantage of FCM's in the range of 2 T bore field, continuously cycled at 1 Hz. In this paper we report the main results on the development of strands and cables suitable for this application, providing details on the strands tested and the cable manufacturing and performance.

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New Results on Minimizing AC Power Losses in a Fast Cycling 2 T Superferric Dipole With a Cold Yoke

Cited by 11 publications

References 6 publications

Thermodynamic Properties of the Superconducting Dipole Magnet of the SIS100 Synchrotron

Thermodynamic Properties of the Superconducting Dipole Magnet of the SIS100 Synchrotron

Nuclotron superconducting magnets and their improvement for use in the SIS100 heavy-ion synchrotron in the fair project

Strand and Cable R&D for Fast Cycled Magnets at CERN

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