The Concept of a Superconducting Magnet System for the Nuclotron

Khodzhibagiyan, Hamlet; Smirnov, A.A.

doi:10.1016/b978-0-408-01259-1.50162-5

Cited by 33 publications

(5 citation statements)

References 3 publications

(2 reference statements)

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“…these magnets are iron dominated magnets using a superconducting coil. These magnets, along with the NICA magnets [5], [6], can be considered as the second generation of the original Nuclotron magnets [7], [8]. The SIS100 synchrotron requires dipoles with a maximum field of 1.9 T, a length of ≈3 m, a ramp rate of 4 T/s and a repetition rate of 1 Hz, while the NICA dipoles will be operated at ramp rates of ≈1.2 T/s.…”

Section: Sis100 Dipolesmentioning

confidence: 99%

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Fischer

Schnizer

Sugita

et al. 2015

IEEE Trans. Appl. Supercond.

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The SIS100 synchrotron for heavy ion research is based on fast-ramped superconducting magnets. These superferric magnets are being designed, built, and tested. The first 3-m-long series dipole (maximum field of 1.9 T; ramp rate of 4 T/s) has been built. We present the test results obtained (quench training, magnetic field, ac loss, and repetition rate) and compare them with the predicted values and the required operation parameters.

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Section: Sis100 Dipolesmentioning

confidence: 99%

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Fischer

Schnizer

Sugita

et al. 2015

IEEE Trans. Appl. Supercond.

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“…The starting point for the design of the magnets and of the cooling system for the SIS100 was the Nuclotron synchrotron at JINR in Dubna, which was constructed on the basis of the fast-cycling super-ferric magnets (Khodzhibagiyan and Smirnov (1988)) and is successfully in operation since 1993. 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)).…”

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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“…For convenience of on-site assembly of the magnetic system of the accelerator (in the tunnel with limited dimensions of the transverse cross section) magnetic-cryostatic modules, ensuring the minimum required number of connections between them and the maximum possible convenience of making them, are needed. The main ideas in the concept of a magnetic system [12], first proposed and implemented in the Nuclotron, are as follows: 1) the system is assembled from identical, easily replaced magnetic-cryostatic modules of three types for dipole, focusing, and defocusing magnets;…”

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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

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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 Concept of a Superconducting Magnet System for the Nuclotron

Cited by 33 publications

References 3 publications

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

Fast-Ramped Superconducting Magnets for FAIR Production Status and First Test Results

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

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