Design of new hollow superconducting NbTi cables for fast cycling synchrotron magnets

Khodzhibagiyan, Hamlet; Alexeev, V.P.; Averichev, S.A.; Drobin, V.M.; Kovalenko, A. D.; Smirnov, A.A.; Starikov, A.Yu.; Vladimirova, N.M.; Moritz, G.; Fischer, Egbert; Potanina, L.V.; Shikov, A.K.; Vedernikov, G.P.

doi:10.1109/tasc.2003.812323

Cited by 26 publications

(10 citation statements)

References 7 publications

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“…The measured degradation of the critical current in a winding excited by continual current pulses of triangular shape does not exceed 8% with magnetic field ramping 8 T/sec. The degradation of the critical current with ramp- ing 4 T/sec, which is the nominal value for the Nuclotron, was no higher than 5% [11]. The temperature difference between the superconductor and the helium cooled conductor in the magnet winding is ~0.05 K with field ramping 4 T/sec.…”

mentioning

confidence: 89%

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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confidence: 89%

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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“…Basic parameters of the setup are presented in Table 2. A short cable sample for the SIS 100 magnets have been produced using the Nuclotron cable machine [8] after it was adapted to the sizes of the cable for SIS100 magnets. The AC losses of the cable were measured.…”

Section: Experimental Study Of Ac Losses In Wire and Cable Samplesmentioning

confidence: 99%

Design and study of new cables for superconducting accelerator magnets: Synchrotron SIS 100 at GSI and NICA collider at JINR*

Khodzhibagiyan

Drobin

Fischer

et al. 2010

J. Phys.: Conf. Ser.

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Design of a twin-aperture 4 T curved dipole based on high current hollow superconducting cables for the NICA collider at JINR A Kovalenko, A Bychkov, A Gromov et al. -Critical mechanical structure of superconducting high current coils for fast ramped accelerator magnets with high repetition rates in long term operation E Fischer, P Schnizer, K Weiss et al. Abstract. Recent data from the design of new optimized options of NbTi composite wires and hollow cables for fast cycling synchrotron SIS100 at GSI and NICA collider at JINR are presented. The SIS100 new cable is proposed to be used for manufacturing of single-layer coil for dipole magnet with maximal amplitude of pulsed magnetic field up to 2 T. The cable should provide continues pulsed operation at the current amplitude of I = 13 kA and magnetic field ramp rate of dB/dt = 4 T/s. The results of experimental study of energy losses in the new wire and cable samples for SIS100 magnets are presented. The design cable parameters for the NICA 4 T dipole magnet are fixed at the level of I =17 kA and dB/dt = 1 T/s. The status of the work is presented and discussed.

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“…For the considered case the 80 K yoke magnet version [3] has the evident advantage that AC losses of the yoke do not occur at the 4.4 K level. The well tested Nuclotron hollow cable [4] can provide the necessary cooling efficiency [5], [6] and moreover, the AC losses in the Nuclotron-type cable are practically equal to the wire losses. This is illustrated in Fig.…”

Section: A General Descriptionmentioning

confidence: 99%

Superferric Quadrupole Magnet With a Pulse Repetition Rate of 10 Hz for High Energy Particle Accelerators

Khodzhibagiyan

Agapov

Bartenev

et al. 2007

IEEE Trans. Appl. Supercond.

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The study of superferric synchrotron magnets with a pulse repetition rate up to 20 Hz is performed at the Laboratory of High Energies of the JINR during the last years. The magnet feature is a low inductance superconducting coil made of a high current hollow cable, cooled with two-phase helium flow at 4.5 K. After the successful tests of fast-cycling 1.4 m model dipoles at the field ramp up to 7 T/s, a proper quadrupole is under design and construction. The new magnet yoke length is about 420 mm and the distance between the pole shoes is 90 mm. The cable comprises 24 wires of 0.73 mm diameter are wound around a copper-nickel tube with an outer diameter of 5 mm. The wire consists of 10374 NbTi filaments of 4.2 m diameter. It is expected that the new 32 T/m quadrupole magnet will operate at pulse repetition rate up to 10 Hz providing the field gradient ramp of 600 T/m per second. The first tests have been carried out in August 2006. Status of the work and obtained results are presented and discussed.

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Design of new hollow superconducting NbTi cables for fast cycling synchrotron magnets

Cited by 26 publications

References 7 publications

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

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

Design and study of new cables for superconducting accelerator magnets: Synchrotron SIS 100 at GSI and NICA collider at JINR*

Superferric Quadrupole Magnet With a Pulse Repetition Rate of 10 Hz for High Energy Particle Accelerators

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