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

Khodzhibagiyan, Hamlet; Drobin, V.M.; Fischer, Egbert; Kovalenko, A. D.; Pantsyrny, V.; Potanina, L.V.; Shikov, A.K.; Vladimirova, N.M.

doi:10.1088/1742-6596/234/2/022017

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…To calculate the magnetic field the slightly modified H-formulation was used, previously described by Pecher et al [13] and Brambilla et al [14]. The base formula of the model is Faraday's law in the form of Equation (2).…”

Section: Methodsmentioning

confidence: 99%

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Archives of Electrical Engineering

Tomków,

Cholewiński,

Ciszek

et al. 2020

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Sections of the superconducting magnets of the SIS100 particle accelerator, under construction at the Facility for Antiproton and Ion Research (FAIR), the Society for Heavy Ion Research (GSI), Darmstadt, are going to be connected with the by-pass lines. Each line will be used to transfer a two-phase helium flow and an electric current. The electric current will be carried by four pairs of superconducting Nuclotron-type cables. Fast-ramping currents are expected to cause the generation of heat within the cables. In this work the results of a numerical thermal analysis of a bus-bar are presented. The amount of heat transferred from the environment was found based on geometric dimensions of the line and applied insulation. The amount of hysteresis loss, generated in the cable during the operation under most demanding regime of the operation of the accelerator, was calculated. According to the amount of the generated heat, the amount of the hysteresis loss is low in relation to the heat generated in the superconducting magnets. Also it was found that the cable used in the line still retains a large margin of current-carrying capacity.

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Section: Methodsmentioning

confidence: 99%

“…The by-pass lines will carry a two-phase helium flow and electric current between the sextants and will supply the quadrupole magnets. Each line will contain four superconducting bus-bars -the pairs of Nuclotron-type cables with NbTi serving as the superconducting material [2,3].…”

Section: Introductionmentioning

confidence: 99%

Archives of Electrical Engineering

Tomków,

Cholewiński,

Ciszek

et al. 2020

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“…In the next step towards series production the first single layer magnet for SIS 100 shall be built together with the vacuum chamber [5,14,24]. So the authors decided to invest the time to make a model of the vacuum chamber which can be solved semi analytically as it is much faster in evaluation and thus easier to handle to optimise the layout.…”

Section: Analytical Modelmentioning

confidence: 99%

Impact of the beam pipe design on the operation parameters of the superconducting magnets for the SIS 100 synchrotron of the FAIR project

Fischer

Schnizer

Heil

et al. 2010

J. Phys.: Conf. Ser.

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Impact of the beam pipe design on the operation parameters of the superconducting magnets for the SIS 100 synchrotron of the FAIR project Abstract. The SIS 100 accelerator of the Facility for Antiprotons and Ion Research (FAIR)at GSI Darmstadt will be the world's second fast ramped synchrotron utilising superconducting magnets in heavy ion research facilities. The request for high current Uranium beams requires vacuum of extremely high quality that can be achieved in long term operation only by cold vacuum chambers acting as a cryogenic pump. Its mechanical stable design options are strongly limited by AC loss generation and field distortion problems. Previous R&D indicated that cooling tubes, keeping the vacuum chamber below 15 K, create large additional eddy currents and thus deteriorate the field with a sextupole. This effect is most dominant at the start of the ramp. The ramp rate of the correctors is limited by the maximum available voltage and as by the heat created on the ramp up and the cooling efficiency of the Nuclotron-type cable. Thus we investigate different means to simplify the vacuum chamber design keeping its temperature below 15 K in the area where the highest suction pumping is required with alternative cooling methods as well as on the compensation margin the sextupole correctors can provide. This work was partly supported by the BMBF.

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“…Bypass lines are designed, manufactured and commissioned by Wrocław University of Technology [2]. In the bus-bars Nuclotron-type cables will be used, with NbTi serving as a material for superconducting filaments [3,4]. Critical temperature of this material at zero magnetic field is approximately 9.2 K and it is going to be cooled with forced two-phase liquid helium flow.…”

Section: Introductionmentioning

confidence: 99%

Heat generation by eddy currents in a shell of superconducting bus-bars for SIS100 particle accelerator at FAIR

Trojanowski

Ciszek

Chorowski

2017

Archives of Electrical Engineering

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Superconducting magnets in the SIS100 particle accelerator require the supply of liquid helium and electric current. Both are transported with by-pass lines designed at Wrocław University of Technology. Bus-bars used to transfer an electric current between the sections of the accelerator will be encased in a steel shell. Eddy currents are expected to appear in the shell during fast-ramp operation of magnets. Heat generation, which should be limited in any cryogenic system, will appear in the shell. In this work the amount of heat generated is assessed depending on the geometry of an assembly of the bus-bars and the shell. Numerical and analytical calculations are described. It was found that heat generation in the shell is relatively small when compared to other sources present in the accelerator and its value strongly depends on the geometry of the shell. The distribution of eddy currents and generated heat for different geometrical options are presented. Based on the results of the calculations the optimal design is proposed.

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

Cited by 7 publications

References 5 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

Impact of the beam pipe design on the operation parameters of the superconducting magnets for the SIS 100 synchrotron of the FAIR project

Heat generation by eddy currents in a shell of superconducting bus-bars for SIS100 particle accelerator at FAIR

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