Title :
Influence of thermal expansion of coil bobbins made of DFRP and GFRP on quench characteristics of superconducting coils
Author :
Takao, T. ; Watanabe, K. ; Kubosaka, T. ; Suzuki, T. ; Kashima, T. ; Yamanaka, A. ; Fukui, S.
Author_Institution :
Fac. of Sci. & Technol., Sophia Univ., Tokyo, Japan
fDate :
6/1/1999 12:00:00 AM
Abstract :
We have excited two types of superconducting coils having same specifications. One is made of DFRP (Dyneema(R) fiber reinforced plastic) bobbins which expands during cooling process from room temperature to liquid helium temperature. The other is made of GFRP (glass fiber reinforced plastic) bobbins which contract during the cooling process. Firstly, we have numerically estimated changes of winding tensions of the two types of the coils by the cooling down. And then, training behaviors of the DFRP and GFRP coils wound with the same winding tension at room temperature were measured. Influence of quench currents in the training quenches and the number of quenches to reach to the maximum currents on the winding tensions at liquid helium temperature is systematically discussed.
Keywords :
glass fibre reinforced plastics; superconducting coils; thermal expansion; winding (process); Dyneema fiber reinforced plastic; coil bobbins; glass fiber reinforced plastic bobbins; liquid helium temperature; quench characteristics; quench currents; room temperature; superconducting coils; thermal expansion; training behavior; winding tensions; Conductors; Cooling; Fiber reinforced plastics; Glass; Superconducting coils; Temperature; Thermal expansion; Thermal quenching; Wounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
