Comparative analysis of design options for current leads for Wendelstein 7-X magnet system

Author

Gavrilin, Andrew V. ; Miller, John R. ; Schauer, Felix ; Van Sciver, Steven W.

Author_Institution

Nat. High Magnetic Field Lab., Tallahassee, FL, USA

Volume

12

Issue

1

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1301

Lastpage

1304

Abstract

The Wendelstein 7-X Project at Max Plank Institute for Plasma Physics, Germany, has a need of analytical and engineering design study for forced flow cooled 18 kA current leads. The main criteria for the current leads´ design should be reliability, serviceability, investment and total operating costs. Since the magnet duty cycle has very long idle current periods, two options look worth considering: gas-cooled conventional current leads properly optimized for the duty cycle to operate in over-current mode (so-called overloaded leads), and binary current leads with high temperature superconducting part. The options are analyzed in detail and optimized to minimize total operating cost with holding the serviceability in emergency case.

Keywords

composite superconductors; cooling; high-temperature superconductors; optimisation; stellarators; superconducting cables; superconducting magnets; superconducting tapes; 18 kA; Wendelstein 7-X magnet system; binary current leads; design criteria; forced flow cooled current leads; gas-cooled conventional leads; high temperature superconducting part; investment costs; long idle current periods; magnet duty cycle; optimization criterion; overcurrent mode; overloaded leads; reliability; serviceability; tape composite; total operating costs; Cooling; Costs; Helium; High temperature superconductors; Investments; Magnetic analysis; Nitrogen; Plasma temperature; Superconducting coils; Superconducting magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2002.1018641

Filename

1018641