The ITER Central Solenoid

Author

Schultz, Joel H. ; Antaya, Timothy ; Feng, Jun ; Gung, Chen-Yu ; Martovetsky, Nicolai ; Minervini, Joseph V. ; Michael, Philip ; Radovinsky, Alexi ; Titus, Peter

Author_Institution

Plasma Sci. & Fusion Center, MIT, Cambridge, MA

fYear

2005

fDate

Sept. 2005

Firstpage

1

Lastpage

4

Abstract

The central solenoid for the International Thermonuclear Experimental Reactor (ITER), a fusion tokamak experiment with the goal of generating 500 MW of fusion power with high gain (Q>10), must provide most of the volt-seconds needed to induce and sustain a 15 MA plasma for burn times of >400 s. The 6.4 GJ central solenoid design requires a 45 kA conductor and has a peak field of 13 T. The central solenoid consists of six pancake-wound modules, stacked vertically, and held in axial compression by an external structure. The five-stage cable has 1/3 copper and 2/3 advanced Nb3Sn strands in a thick superalloy conduit and is cooled by the forced-flow of supercritical helium through the cable space. Key design issues include the qualification of a conduit with adequate fatigue strength, avoiding filament damage from transverse Lorentz loads, eliminating axial tension in the winding insulation, and qualification of space-saving intramodule butt joints

Keywords

Tokamak devices; fatigue; fusion reactor design; solenoids; superconducting cables; superconducting magnets; 1/3 copper strands; 2/3 advanced Nb₃Sn strands; ITER central solenoid; International Thermonuclear Experimental Reactor; axial tension elimination; fatigue strength; filament damage; five-stage cable; fusion power; fusion tokamak experiment; six pancake-wound modules; space-saving intramodule butt joints; superconducting magnets; supercritical helium forced-flow; thick superalloy conduit; transverse Lorentz loads; winding insulation; Conductors; Copper; Fusion power generation; Fusion reactor design; Inductors; Plasmas; Power generation; Qualifications; Solenoids; Tokamaks; ITER; cable in conduit; fusion reactors; superconducting magnets; superconductors;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering 2005, Twenty-First IEEE/NPS Symposium on

Conference_Location

Knoxville, TN

Print_ISBN

0-4244-0150-X

Electronic_ISBN

0-4244-0150-X

Type

conf

DOI

10.1109/FUSION.2005.252874

Filename

4018908