Experimental Results on the Development of Superconducting NbTi/Cu-Mn/Cu Wires for Magnet Systems of SIS100 and SIS300 Synchrotrons of FAIR

Potanina, L.V.; Pantsyrny, V.; Shikov, A.K.; Salunin, N. I.; Gubkin, I.N.; Khodzhibagiyan, Hamlet; Kovalenko, A. D.; Fischer, Egbert; Mueller, H.; Moritz, G.

doi:10.1109/tasc.2010.2043830

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…The maximum generation of heat during the normal operation of the bus-bar is approximately 2.75 W•m −1 , the average is 0.79 W/m. This value translates to approximately 68 mJ/cm 3 per cycle, the value similar to the ones based on experimental results reported at [19]. The total average hysteresis heat generation in 6 by-pass lines with a length of approximately 45 m each is 213 W. This value is small relative to heat budget of the accelerator, approximately 5% of the total expected heat generation.…”

Section: Resultssupporting

confidence: 82%

“…In the considered range of temperatures it is close to constant and independent of temperature. A value of 0.75 • 10 −9 Ω•m was assumed, roughly corresponding with the value for copper with an RRR of 20. ρ t denotes the effective resistivity of the matrix which, assuming the presence of contact resistance between superconducting filaments and the matrix, is calculated with Formula (19).…”

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: Resultssupporting

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Archives of Electrical Engineering

Tomków,

Cholewiński,

Ciszek

et al. 2020

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“…The ratio of D ef f /D fil for wires of Design 1 is close to the values reported in [3] for wires of similar design (see line 8 in Table II) which were fabricated at the experimental workshop of the Bochvar Institute, using semi-industrial facilities. As for the wires of Design 2 (lines 5, 6, 7 in Table II), this is the case when the ratio of D ef f /D fil is 1.23-1.27 which fully satisfies the requirements specified for the FAIR wires (≤ 1.5) [4].…”

Section: Hysteresis Losses and Effective Diametersupporting

confidence: 82%

“…In order to find the most convenient method for industry to produce FAIR wires, while maintaining an acceptable level of superconducting properties, two double stacking design options were offered and a comparative study of the fabricated experimental wires was carried out [3].…”

Section: Introductionmentioning

confidence: 99%

Study of Low Loss Experimental Superconducting Nb-Ti Wires to be used in FAIR Magnets

Karasev

Potanina

Salunin

et al. 2015

IEEE Trans. Appl. Supercond.

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For the effective operation of the Facility for Antiproton and Ion Research (FAIR) magnet system, a new class of superconducting wires with high current carrying capacity and low energy losses is needed. Special requirements are formulated to the wires for this application. Diameter of Nb-Ti filaments has to be about 3 μm, critical current density J c has to be above 4500 A/mm 2 (at 2 T; 4.2 K) and filament twist pitch should be as small as possible without a degradation of critical current density. These wires with small filaments should contain a resistive (Cu-0.5%Mn) inter-filament matrix to reduce inter-filament coupling current losses and OF copper outside and inside the filamentary region to provide required stabilization. The comparative study of low losses superconducting Nb-Ti wires of different designs was performed. These experimental wires intended for use in FAIR model magnets were fabricated by double stacking method. The experimental Nb-Ti wires conform to the abovementioned requirements. This paper presents current characteristics, hysteresis losses and other properties of experimental low losses Nb-Ti wires. The benefits of each design are discussed.

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“…The cycles started at zero current; then, the magnet was ramped up to maximum current and ramped down to zero current without any flat top. The losses were considerably lower than the expected value of 70 W. This is mainly due to the superconducting wire with small filaments and a CuMn matrix [20], and the silicon steel M600-100A. The prediction of 70 W was based on measurements obtained from the model magnets, which were built of M700-100A, as this was readily available when the model magnets were produced [18], [19].…”

Section: A Test Resultsmentioning

confidence: 97%

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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Experimental Results on the Development of Superconducting NbTi/Cu-Mn/Cu Wires for Magnet Systems of SIS100 and SIS300 Synchrotrons of FAIR

Cited by 6 publications

References 4 publications

Archives of Electrical Engineering

Archives of Electrical Engineering

Study of Low Loss Experimental Superconducting Nb-Ti Wires to be used in FAIR Magnets

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

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