HTS Dipole Insert Developments

Rey, Jean‐Michel; Devaux, M.; Bertinelli, F.; Chaud, X.; Debray, F.; Durante, M.; Favre, Gilles; Fazilleau, Philippe; Lécrevisse, Thibault; Mayri, C.; Pes, C.; Pottier, F; Sorbi, M.; Stenvall, Antti; Tixador, Pascal; Tudela, Jean-Marc; Tardy, T.; Volpini, G.

doi:10.1109/tasc.2013.2237931

Cited by 18 publications

(11 citation statements)

References 9 publications

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“…The resulting bursting forces on one coil F x total are 512 tons·m -1 (Table III). They are about 30 % lower than the ones foreseen in the previous EuCARD HTS insert pancakes made of ReBCO tapes -750 tons·m -1 [18,19]. For the standalone mode, they are only 88 tons·m -1 .…”

Section: B Lorentz Forces In Magnet Coil Blocksmentioning

confidence: 60%

Cos- <inline-formula> <tex-math notation="TeX">$\theta$</tex-math></inline-formula> Design of Dipole Inserts Made of REBCO-Roebel or BSCCO-Rutherford Cables

Lorin

Segreti

Ballarino³

et al. 2015

IEEE Trans. Appl. Supercond.

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1 Abstract-Next generation of dipole magnets with field higher than 16 T are considered for future particle colliders. To do so, combined-technology magnets -made of Nb-Ti, Nb 3 Sn and HTS materials -have to be developed to reduce the cost of such a magnet. Therefore, in the framework of the EuCARD-2 project, many HTS dipole magnet designs have to be investigated so as to find the most effective design for the HTS insert in a graded magnet. This paper discusses the Cosθ option. A 5 T standalone configuration of the HTS accelerator magnet (the first goal of EuCARD2) appears to be achievable, whereas mechanical stress distribution shows that its use as insert in graded magnet is very challenging. This paves the way for alternative designs as the socalled slot or motor-like design, briefly introduced here.

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Section: B Lorentz Forces In Magnet Coil Blocksmentioning

confidence: 60%

Cos- <inline-formula> <tex-math notation="TeX">$\theta$</tex-math></inline-formula> Design of Dipole Inserts Made of REBCO-Roebel or BSCCO-Rutherford Cables

Lorin

Segreti

Ballarino³

et al. 2015

IEEE Trans. Appl. Supercond.

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“…It consists of two YBCO tapes soldered together with copper shunt in the middle. This configuration was motivated by the HTS insert magnet study in [20]. Two CuBe 2 tapes have been co-wound to strengthen the cable mechanically and to provide protection in case of a quench.…”

Section: Modelling Domain Used In Nzpv Computationmentioning

confidence: 99%

“…The field values are only used to achieve the corresponding T cs values and are not taken from any existing magnet design. The operation temperature in the simulations was 4.2 K and the nominal operation current was set to 2800 A as in [20], which corresponds to the engineering current density J e of 250 A/mm 2 . A quench was initiated by setting the critical current to 0 A at the hot spot in Fig.…”

Section: Operation Conditionsmentioning

confidence: 99%

Variation of Quench Propagation Velocities in YBCO Cables

Haro

Järvelä

Stenvall

2015

J Supercond Nov Magn

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We show by modelling that the quench propagation velocity is not constant in HTS coils but it changes during the quench. Due to the large temperature margin between the operation and the current sharing temperatures, the normal zone does not propagate with the temperature front. This means that the temperature will rise in a considerably larger volume when compared to the quenched volume. Thus, the evolution of the temperature distribution below current sharing temperature T cs after the quench onset affects the normal zone propagation velocity in HTS more than in LTS coils. This can be seen as an acceleration of the quench propagation velocities while the quench evolves when margin to T cs is high. In this paper we scrutinize quench propagation in a stack of YBCO cables with an in-house finite element method software which solves the heat diffusion equation. We compute the longitudinal and transverse normal zone propagation velocities at various distances from the hot spot to demonstrate the distance-variation of these velocities. According to the results in our particular simulation case, the longitudinal normal zone propagation velocity is 30 % higher far away from the quench origin compared to its immediate vicinity when T op =4.2 K and T cs =15 K.

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“…Its goal is to upgrade the existing FRESCA cable test facility at CERN. The dipole magnet of the upgraded FRESCA test facility, called hereafter FRESCA2, should provide nominal flux density of 13 T in a 100 mm bore, allowing testing of Nb 3 Sn and HTS cables [2]. The FRESCA2 magnet also aims at serving as a support and background field for a 100-mm-diameter, 6 T high-temperature-superconductor (HTS) dipole insert [3].…”

Section: Introductionmentioning

confidence: 99%

New vertical cryostat for the high field superconducting magnet test station at CERN

Craen¹,

Atieh²,

Bajko³

et al. 2014

AIP Conference Proceedings

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Abstract. In the framework of the R&D program for new superconducting magnets for the Large Hadron Collider accelerator upgrades, CERN is building a new vertical test station to test high field superconducting magnets of unprecedented large size. This facility will allow testing of magnets by vertical insertion in a pressurized liquid helium bath, cooled to a controlled temperature between 4.2 K and 1.9 K. The dimensions of the cryostat will allow testing magnets of up to 2.5 m in length with a maximum diameter of 1.5 m and a mass of 15 tons. To allow for a faster insertion and removal of the magnets and reducing the risk of helium leaks, all cryogenics supply lines are foreseen to remain permanently connected to the cryostat. A specifically designed 100 W heat exchanger is integrated in the cryostat helium vessel for a controlled cooling of the magnet from 4.2 K down to 1.9 K in a 3 m 3 helium bath. This paper describes the cryostat and its main functions, focusing on features specifically developed for this project. The status of the construction and the plans for assembly and installation at CERN are also presented.

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HTS Dipole Insert Developments

Cited by 18 publications

References 9 publications

Cos- <inline-formula> <tex-math notation="TeX">$\theta$</tex-math></inline-formula> Design of Dipole Inserts Made of REBCO-Roebel or BSCCO-Rutherford Cables

Cos- <inline-formula> <tex-math notation="TeX">$\theta$</tex-math></inline-formula> Design of Dipole Inserts Made of REBCO-Roebel or BSCCO-Rutherford Cables

Variation of Quench Propagation Velocities in YBCO Cables

New vertical cryostat for the high field superconducting magnet test station at CERN

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