A pulsed dipole magnet made from a hollow composite superconductor with a circulatory refrigeration system

Agapov, N.N.; D'yachkov, E.I.; Khodzhibagiyan, Hamlet; Krylov, Victor V.; Kulikov, Yu. V.; Kuryatnikov, E.K.; Kuzichev, V.N.; Makarov, L.G.; Nikitaev, P.I.; Sazonov, N.M.; Smirnov, A.A.; Stekol'shchikov, V.V.; Zel'dovich, A.G.

doi:10.1016/0011-2275(80)90187-3

Cited by 9 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A two-phase helium flow was chosen as a coolant after an experimental test of the cooling conditions on the model magnets [3][4][5]. In comparison with two-phase helium, a single-phase coolant (liquid helium) leads to a multiple increase of the helium flow through the magnet, some rise in cooling temperature and a drop in the stability of the SC winding to heat loads from radiation losses.…”

Section: Cooling Of the Magnetsmentioning

confidence: 99%

The Concept of a Superconducting Magnet System for the Nuclotron

Khodzhibagiyan

Smirnov

1988

Proceedings of the Twelfth International Cryogenic Engineering Conference Southampton, UK, 12–15 July 1988

Self Cite

View full text Add to dashboard Cite

Section: Cooling Of the Magnetsmentioning

confidence: 99%

The Concept of a Superconducting Magnet System for the Nuclotron

Khodzhibagiyan

Smirnov

1988

Proceedings of the Twelfth International Cryogenic Engineering Conference Southampton, UK, 12–15 July 1988

Self Cite

View full text Add to dashboard Cite

“…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.…”

mentioning

confidence: 99%

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

View full text Add to dashboard Cite

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...

show abstract

“…The first objects to be procured are the main dipoles. These dipole magnets are following a superferric magnet design pioneered for the Nuclotron [1,2,3]: these magnets are iron dominated but with a superconducting coil. The coil is based on the Nuclotron cable, which is a hollow tube with superconducting wires wrapped around it.…”

mentioning

confidence: 99%

The optimised sc dipole of SIS100 for series production

Roux

Mierau

Bleile

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Abstract. At the international facility for antiproton and ion research (FAIR) in Darmstadt, Germany, an accelerator complex is developed for fundamental research in various fields of modern physics. In the SIS100 heavy-ion synchrotron, the main accelerator of FAIR, superconducting dipoles are used to bend the particle beam. The fast ramped dipoles are 3 m long super-ferric curved magnets operated at 4.5 K. The demands on field homogeneity required for sufficient beam stability are given by ∆B/B ≤ ±6 · 10 −4 . An intense measurement program of the First of Series (FoS) dipole showed excellent quench behavior and lower than expected AC losses yielding the main load on the SIS100 cryoplant. The FoS is capable to provide a field strength of 1.9 T. However, with sophisticated measurement systems slight distortions of the dipole field were detected. Those effects were tracked down to mechanical inaccuracies of the yoke proven by appropriate geometrical measurements and simulations. After a survey on alternative fabrication techniques a magnet with a new yoke was built with substantial changes to improve the mechanical accuracy. Its characteristics concerning cryogenic losses, cold geometry and the resulting magnetic-field quality are presented and an outlook on the series production of superconducting dipoles for SIS100 is given.

show abstract

A pulsed dipole magnet made from a hollow composite superconductor with a circulatory refrigeration system

Cited by 9 publications

References 2 publications

The Concept of a Superconducting Magnet System for the Nuclotron

The Concept of a Superconducting Magnet System for the Nuclotron

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

The optimised sc dipole of SIS100 for series production

Contact Info

Product

Resources

About