Propagation velocity for a force cooled superconductor

Cornelissen, M. C. M.; Hoogendoom, C.J

doi:10.1016/0011-2275(85)90134-1

Cited by 17 publications

(2 citation statements)

References 15 publications

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“…The propagation of quench in force-flow cooled conductors, among them CICCs, has been subjected to intense experimental [1][2][3], analytical [4][5][6] and numerical [7][8][9][10][11] studies in the past 15 years, of which the references † E-mail: botturl@mt.msm.cern.ch quoted above only give a limited example of the work performed. It is generally accepted that quench propagation in force-flow cooled conductors can be described to a sufficient accuracy modelling it along the conductor length (in 1D), neglecting transverse effects.…”

Section: Introductionmentioning

confidence: 99%

The influence of cable conduction on quench propagation in force-flow cooled conductors

Bottura

1996

Supercond. Sci. Technol.

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This paper discusses the influence of thermal conduction along the cable on the propagation of normal zones in force-flow cooled conductors. It is shown that because of conduction in the cable, and because of a temperature gradient between the cable and the cooling helium, the normal zone always propagates faster than the speed of the helium being ejected from the normal zone: the normal front advances the heated helium slug. Expressions to estimate the front advance speed are given, and its influence on the global propagation speed is discussed.

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Section: Introductionmentioning

confidence: 99%

The influence of cable conduction on quench propagation in force-flow cooled conductors

Bottura

1996

Supercond. Sci. Technol.

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“…are caused by the temperature rise due to the compression of the fluid at the edge of the normal zone [ 2 ] .…”

Section: Normal Voltage Risementioning

confidence: 99%

Development of a forced-cooled superconducting coil for fusion applications

Shimada

Hamajima

Sawada

IEEE Thirteenth Symposium on Fusion Engineering

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The test coil was wound from a NbTi cable-inconduit type conductor with 54 strands and the total conductor length was 36 I&. It was cooled with supercritical helium forcedly. The critical current of the test coil was 3.5 kA at 7 tesla. The test coil was in--stalled in a back-up coil which generated the magnetic field up to 7 tesla. This paper describes the experimental results about the propagation velocity of normal zone and the pressure rise when the forced-cooled superconducting coil quenched. We also analyzed the stability margin of the coil using computer simulation.

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Quench propagation of forced‐flow‐cooled superconducting coil

Shimada

Hamajima

Yamaguchi

1993

Electrical Engineering Japan

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Forced-flow-cooled superconducting coil (FCC) has several advantages: large stability margin; high mechanical rigidity; and good electrical insulation. As a result, FCC could provide efficient superconducting magnet systems for such large machines as fusion devices.Cable-in-conduit conductor (CICC) is regarded to be most attractive for FCC because of its good heat transfer characteristics which make the magnet more stable against disturbances. However, there are some problems. One problem is that the coolant pressure will become very high during a quench because its hydraulic diameter is relatively small. Also. the propagation of a normal zone has a close relation with the pressure rise. These characteristics must be considered in designing and protecting FCC. This paper describes the results of the stability tests of FCC and the analyses of these characteristics. and compares them with the results of numerical simulations.

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Propagation velocity for a force cooled superconductor

Cited by 17 publications

References 15 publications

The influence of cable conduction on quench propagation in force-flow cooled conductors

The influence of cable conduction on quench propagation in force-flow cooled conductors

Development of a forced-cooled superconducting coil for fusion applications

Quench propagation of forced‐flow‐cooled superconducting coil

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