Low Temperature Characteristics of MOSFET Targeting Low-Voltage High-Current Power Source for Superconducting Magnets

Author

Kawanami, Ryo ; Ishigohka, Takeshi

Author_Institution

Seikei Univ., Tokyo

Volume

16

Issue

2

fYear

2006

fDate

6/1/2006 12:00:00 AM

Firstpage

1630

Lastpage

1633

Abstract

The authors propose a low-voltage/high-current DC power source using multi-parallel-connected MOSFETs for an excitation power source of superconducting magnets. The power source can operate at 77 K in liquid nitrogen bath. The fundamental idea and some preliminary experimental results are presented. The preliminary experiment using 100 MOSFETs connected in parallel are carried out. The forward-direction voltage drop both at room temperature and 77 K has been measured. The experimental results show good prospect for this type of DC power source in order to excite superconducting magnets

Keywords

MOSFET; power supplies to apparatus; superconducting coils; superconducting magnets; 293 to 298 K; 77 K; MOSFETs; liquid nitrogen; low-voltage-high-current DC power source; superconducting coil; superconducting magnets; voltage drop; Cryogenics; Current transformers; Diodes; High temperature superconductors; Joining processes; MOSFET circuits; Manufacturing; Power MOSFET; Superconducting magnets; Voltage; Excitation of superconducting coil; MOSFET; low temperature; power source;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2006.870450

Filename

1643171