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Minimum quench power dissipation and current non-uniformity in international thermonuclear experimental reactor type NbTi cable-in-conduit conductor samples under direct current conditions
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10.1063/1.4709438
/content/aip/journal/jap/111/9/10.1063/1.4709438
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/9/10.1063/1.4709438

Figures

Image of FIG. 1.
FIG. 1.

PFIS (left) and PFCI (right) samples layout.1,10

Image of FIG. 2.
FIG. 2.

PFIS bottom joint cross section.

Image of FIG. 3.
FIG. 3.

PFCN1 upper termination featuring the combo box design.13

Image of FIG. 4.
FIG. 4.

PFCN1 bottom “U” bend in the hairpin box.

Image of FIG. 5.
FIG. 5.

Electrical network modelling the CICC in the code JackPot.

Image of FIG. 6.
FIG. 6.

Finite element models of the PFIS/PFCI (left) and the PFCN1 (right) terminations.

Image of FIG. 7.
FIG. 7.

PFCI Run # 035-01 power dissipation distribution at quench taking into account the coil axial temperature profile (Y secondary axis).

Image of FIG. 8.
FIG. 8.

Summary of the simulated (square and diamond) and measured (dot) Ic and Tcs for PFIS.

Image of FIG. 9.
FIG. 9.

Electric field evolution versus temperature for PFCN1 Tcs Run #SSPF2D180510 with transport current 20 kA and SULTAN background field 5 T.

Image of FIG. 10.
FIG. 10.

Strand dissipation versus quench current for different quench lengths of the PFIS (left) and PFCN1 (right).

Image of FIG. 11.
FIG. 11.

Strand dissipation distribution at quench in the cross section of PFIS W where the strand peak power generation is located for 13.5 kA at 6 T background field.

Image of FIG. 12.
FIG. 12.

Strand dissipation distribution at quench in the cross section of PFIS W where the strand peak power generation is located for 41.5 kA at 6 T background field.

Image of FIG. 13.
FIG. 13.

Vector plot of the self-field over the cross section of a PFIS leg (left) and SULTAN background field axial profile (right). The self-field in the centre of the CICC is not zero due to the second leg of the U-shaped sample carrying an opposing current. The self-field is higher at the surface of cable due to the assumption of uniform current distribution over the cross section. At the inner edge (x ∼ 18 mm) self and background field sum, while they subtract at the outer edge (x ∼ −18 mm).The insert shows one leg of the PFIS sample with the used system of reference.

Image of FIG. 14.
FIG. 14.

Strand dissipation distribution along the z-axis of PFIS W for 13.5 kA at 6 T background field.

Image of FIG. 15.
FIG. 15.

Strand dissipation distribution along the z-axis of PFIS W for 41.5 kA at 6 T background field.

Image of FIG. 16.
FIG. 16.

Strand power dissipation distribution along PFIS z-axis.

Image of FIG. 17.
FIG. 17.

Strand peak power dissipation density at quench. Solid lines show the sample trend.

Image of FIG. 18.
FIG. 18.

Cable power dissipation density at quench. Solid lines show the sample trend.

Image of FIG. 19.
FIG. 19.

Overload of the strand with peak power dissipation at quench versus quench current.

Tables

Generic image for table
Table I.

Design and operating parameters of ITER PF coils.

Generic image for table
Table II.

Summary of the JackPot model parameters used in the PFIS simulation.

Generic image for table
Table III.

Peak quench power and current non-uniformity of the samples at operating conditions of ITER PF coils.

Generic image for table
Table IV.

PFIS conductor and sample parameters.

Generic image for table
Table V.

PFCI conductor and sample parameters.

Generic image for table
Table VI.

PFCN1 conductor parameters.

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/content/aip/journal/jap/111/9/10.1063/1.4709438
2012-05-02
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Minimum quench power dissipation and current non-uniformity in international thermonuclear experimental reactor type NbTi cable-in-conduit conductor samples under direct current conditions
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/9/10.1063/1.4709438
10.1063/1.4709438
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