Influence of Structural Material and Epoxy Impregnation on Coil Strains in Y123 Pancake Coil

Author

Takao, Tomoaki ; Sakai, Shin´ichi ; Ishizu, Kentaro ; Nakayama, Daiki ; Nishimura, Kosuke ; Sakamoto, Orie ; Goto, Tetsu ; Yamanaka, A. ; Fukui, Satoshi ; Nishimura, Akira

Author_Institution

Fac. of Sci. & Technol., Sophia Univ., Tokyo, Japan

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

5

Abstract

Single-pancake coils having different winding turns are fabricated. The bobbin material used for the coils is a Dyneema fiber-reinforced plastic (DFRP), which has a thermal expansion property during cooling. The influence of the DFRP´s expansion on thermal strains of the coil during cooling is experimentally estimated. In the experiment, the thermal strains on the superconducting tape of the outermost turns in the coils are measured. The dependence of epoxy impregnation on the thermal strain of the coil is also experimentally estimated. According to the experimental data, the combination of impregnation and the bobbin´s expansion effectively decreases thermal contraction of the outermost tape.

Keywords

barium compounds; cooling; fibre reinforced plastics; high-temperature superconductors; resins; superconducting coils; superconducting tapes; thermal expansion; windings; yttrium compounds; DFRP; Dyneema fiber-reinforced plastics; Y123 single-pancake coils; YBCO; bobbin material; coil strains; cooling; epoxy impregnation; structural material; superconducting tape; thermal contraction; thermal expansion; thermal strains; winding; Coils; Integrated circuits; Materials; Strain; Temperature measurement; Thermal expansion; Windings; Bobbin; impregnation; pancake coil; thermal strain;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2285709

Filename

6632906