Liquid helium-free superconducting magnets and their applications

✍ Scribed by K. Watanabe; S. Awaji; T. Fukase; Y. Yamada; J. Sakuraba; F. Hata; C.K. Chong; T. Hasebe; M. Ishihara

• Book ID: 104110775
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 348 KB
• Volume: 34
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/s0011-2275(05)80150-x

✦ Synopsis

A new superconducting magnet (4.6 T, 38 mm room temperature bore) which consists of a low-T~ Nb3Sn superconducting magnet and high-To Bi2Sr2Ca2Cu3Olo current leads has been working in vacuum for about 7400 hours without trouble. An experiment at a field of 3.7 T, which is generated by an operating current of 370 A, has been continuously performed for 1200 hours. The high-T~ current leads have experienced 13 thermal cycles from room temperature to 10 K. It is found that the high-T~ current leads can hold excellent superconducting properties for a long enough time to be practically used. As a next step, an 11 T-52 mm room temperature bore, a 6 T-220 mm room temperature bore and a 5 T-~ 50 mm × 10 mm room temperature gap liquid helium-free superconducting magnet are now under construction.