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A superconducting transformer system for high current cable testing
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10.1063/1.3340888
/content/aip/journal/rsi/81/3/10.1063/1.3340888
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/3/10.1063/1.3340888

Figures

Image of FIG. 1.
FIG. 1.

Simplified schematic of the superconducting transformer and feedback system.

Image of FIG. 2.
FIG. 2.

Amplification factor as a function of secondary turns for load inductances from 0 to , based on the geometry used in the transformer described here. The actual turn number chosen is , yielding a reasonable performance for both low-inductance short samples and higher-inductance test coils.

Image of FIG. 3.
FIG. 3.

Artist impression of the superconducting transformer system. Dimensions are in millimeters.

Image of FIG. 4.
FIG. 4.

Electrical equivalent circuit of a Rogowski coil.

Image of FIG. 5.
FIG. 5.

Electrical schematic of the transformer and control system.

Image of FIG. 6.
FIG. 6.

Block schematic of the transformer and control system.

Image of FIG. 7.
FIG. 7.

Amplitude and phase of the transfer function of the transformer as a function of frequency.

Image of FIG. 8.
FIG. 8.

Amplitude and phase of the transfer function of the total system as a function of frequency.

Image of FIG. 9.
FIG. 9.

Secondary current as a function of primary current with the secondary heater switched on.

Image of FIG. 10.
FIG. 10.

Effective ratio between the primary and secondary current.

Image of FIG. 11.
FIG. 11.

Electric field as a function of transport current, measured on a Rutherford cable at 11 T applied magnetic field. The inset shows the data for Cable 1 on a double logarithmic scale.

Tables

Generic image for table
Table I.

Secondary cable and primary wire specifications (uninsulated).

Generic image for table
Table II.

Transformer system specifications.

Generic image for table
Table III.

Approximate Rogowski coil specifications.

Generic image for table
Table IV.

Current measurement calibration summary.

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/content/aip/journal/rsi/81/3/10.1063/1.3340888
2010-03-24
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A superconducting transformer system for high current cable testing
http://aip.metastore.ingenta.com/content/aip/journal/rsi/81/3/10.1063/1.3340888
10.1063/1.3340888
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