Local Cryogenics for the SIS100 at FAIR

Eisel, T.; Chorowski, M.; Iluk, A.; Kauschke, M.; Kollmus, H.; Malcher, K.; Poliński, J.; Štreicher, B.

doi:10.1088/1757-899x/101/1/012075

Cited by 8 publications

(8 citation statements)

References 1 publication

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“…The calculated eddy current heat generation occurring in the shell is very small when compared to other heat inputs to the cryogenic system. There are going to be 6 by-pass lines with a length of approximately 45 m connecting sections of the SIS100 accelerator [2]. The total heat generation according to the worst case scenario of analytical calculations will be approximately 0.29 W. In the best case scenario heat generation will be much lower, approximately 0.036 W. Expected heat leaks to cryogenic transfer lines of the SIS-300 accelerator are at a level of 165 W, for SIS-100 they are expected to be slightly lower [13].…”

Section: Discussionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

“…The effort is coordinated by Jagiellonian University of Krakow. 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].…”

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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“…The BPLs and FBs are dedicated to transferring liquid helium and AC electric current between SIS100 arc sections and superconducting quadrupole magnets located in warm straight sections of the synchrotron [3,4]. A main innovative feature of the cryogenic bypass line is transferring the electric current and liquid helium in one vacuum vessel, while in other similar projects, namely, the Large Hadron Collider at CERN (CH) [5] or the Tevatron at FermiLab (USA) [6], those functions were separated.…”

Section: Cryogenic Bypass Linementioning

confidence: 99%

“…• the busbars routing in the compensation loop area should minimize the electromagnetic crosstalk between busbar pairs, • support system able to resist the significant Lorentz forces between busbars in the pair, • prevention of cyclic movement of the busbars caused by AC current cycles. Especially the electromagnetic cross-talk -the current induced in one cable by the electromagnetic field generated by the close, high-current cable -is a significant problem influencing the precise control of the fast-ramping SIS100 magnets [4]. For this reason the busbar pairs were located as far as possible from each other and two pairs were rotated by 90 deg (fig.…”

Section: Cryogenic Bypass Linementioning

confidence: 99%

Mechanical stability of SIS100 Bypass Line busbars clamping system under AC current load

Iluk

Chorowski

Poliński

et al. 2022

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

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This paper presents the lessons learned from tests of first module of superconducting cryogenic bypass line (BPL), a part of the international Facility for Antiproton and Ion Research (FAIR) SIS100 cryogenic system, currently under construction in Darmstadt, Germany. Design, manufacturing, and installation of the superconducting cryogenic bypass line is a part of a Polish in-kind contribution to the FAIR project, realized by the Wroclaw University of Science and Technology. The main goal of the tests was to check the superconducting, Nuclotron type busbar system containing four pairs of busbars, transferring 13.2 kA pulsing current with the ramp rate of 28 kA/s. The mechanical stability of the busbars, especially at the connection region, was investigated with the use of vibration sensors and cameras located inside the vacuum space. The tests revealed insufficient mechanical stability of the busbars in the connection area due to pulsing Lorentz forces, and necessity of additional supports and clamps. Results of the tests were presented and discussed. The conclusions can be significant not only for the bypass line design, but also for design of the busbar connections in the superconducting magnets.

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“…In SIS100, the electrical busbars and hydraulic process pipes coexist in a single, relatively small vacuum vessel. More details about the SIS100 design are provided in [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Mechanical Strains in Thermal Compensation Loop of Superconducting NbTi Cable during Bending and Cyclic Operation

Iluk¹

2021

Materials

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In the paper, the thermal compensation loops on a composite, superconducting NbTi cable were investigated. This type of cable is used in the superconducting, fast ramping magnets of the SIS100 synchrotron, part of the Facility for Antiproton and Ion Research (FAIR) under construction in Darmstadt, Germany. The influence of space restrictions and electromagnetic cross-talk on the design of the thermal compensation loop was discussed. Plastic deformation of cable components during bending was analyzed by numerical simulations and experiments. A three-dimensional numerical model of the cable was prepared with individual superconducting wires in contact with a central cooling pipe. The bending of a straight cable into a compensation loop shape was simulated, followed by cyclic operation of the cable during thermal cycles. The maximum strains in the superconducting strands and cooling tube were analyzed and discussed.

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Local Cryogenics for the SIS100 at FAIR

Cited by 8 publications

References 1 publication

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

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

Mechanical stability of SIS100 Bypass Line busbars clamping system under AC current load

Investigation of Mechanical Strains in Thermal Compensation Loop of Superconducting NbTi Cable during Bending and Cyclic Operation

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