Development of Central Solenoid for JT-60SA

Author

Kizu, K. ; Murakami, H. ; Tsuchiya, K. ; Yoshida, Kenta ; Nomoto, Kazuki ; Imai, Yuki ; Minato, T. ; Obana, T. ; Hamaguchi, S. ; Takahata, K.

Author_Institution

Japan Atomic Energy Agency, Naka, Japan

Volume

23

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

4200104

Lastpage

4200104

Abstract

Several components for central solenoid (CS) of JT-60 Super Advanced (JT-60SA) were newly developed and tested. The butt-type joint, the electrical resistance of which is about 2 nΩ, was developed to increase the winding diameter. The insulation system, which consists of Glass/Kapton/Glass tape and Bisphenol A diglycidyl ether (DGEBA) epoxy, showed sufficient tensile strength after the irradiation of 100 kGy. Insulation characteristics of 4 × 4 winding stack sample after the compression of 705 kN 36 000 times was able to withstand voltages larger than 21 kV. The heat treatment and transfer of the CS model coil with superconductor were conducted. The pancake temperature during flat top was maintained at 923 ± 4 K. The maximum temperature difference in the pancake was 30 K. All manufacturing processes were confirmed so that the mass production of CS will be started in 2013.

Keywords

electrical resistivity; heat transfer; heat treatment; solenoids; superconducting coils; tensile strength; DGEBA epoxy; JT-60 Super Advanced; JT-60SA; butt type joint; central solenoid; electrical resistance; heat transfer; heat treatment; insulation system; pancake temperature; tensile strength; winding diameter; Bonding; Conductors; Insulation; Joints; Superconducting cables; Temperature measurement; Windings; $hbox{Nb}_{3}hbox{Sn}$; Butt joint; JT-60 Super Advanced (JT-60SA); central solenoid (CS);

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2227647

Filename

6353535