-
Author(s):
ÊÔ½¸ÀÕǤ: ÂÀÅáÀî¶³¼£¡¢»³ËܽãÌé¡¢»°¸ÍÍø¹Ô Editors: K. Tachikawa, J. Yamamoto and T. Mito
-
Title:
³ËÍ»¹ç²Ê³Ø¸¦µæ½ê¶¦Æ±¸¦µæ ³ËÍ»¹çϧÍÑÀè¿ÊĶÅÁƳƳÂÎ ¸¦µæÄ´ººÊó¹ð½ñ 2 Àè¿Ê¶â°·ÏĶÅÁƳƳÂÎ Studies on Advanced Superconductors for Fusion Device Part 2 - Metallic Superconductors other tnan Nb_3 Sn -
Date of publication:
Mar. 1997
-
Key words:
superconductor, Al5 type compound other than Nb_3Sn, Bl type compound, Cl5 type compound, Cheverel type compound, new AC wire, magnetic shield, radioactivity
-
Abstract:
A comprehensive report on the present status of the development of Nb_3Sn superconductors was published as the NIFS-MEM0-20 in March, 1996 ( Part l of this report series ). The second report of this study covers various progress so far achieved in the research and development on advanced metallic superconductors other than Nb_3Sn. Among different A15 crystal-type compounds, Nb_3Al has been fabricated into cables with large current-carrying capacity for fusion device referring its smaller sensitivity to mechanical strain than Nb_3Sn. Other high-field A15 superconductors, e. g. V_3Ga, Nb_3Ge and Nb_3(Al,Ge), have been also fabricated through different novel processes as promising alternatives to Nb_3Sn conductors. Meanwhile, Bl crystal-type NbN and C15 crystal-type V_2(Hf,Zr) high-field superconductors are characterized by their excellent tolerance to mechanical strain and neutron irradiation. Cheverel-type PbMo_6S_8 compound has gained much interests due to its extremely high upper critical field. In addition, this report includes the recent progress in ultra-fine filamentary NbTi wires for AC use, and that in NbTi/Cu magnetic shields necessary in the application of high magnetic field. The data on the decay of radioactivity in a variety of metals relating to fusion superconducting magnet are also attached as appendices. We hope that this report might contribute substantially as a useful reference for the planning of fusion apparatus of next generation as well as that of other future superconducting devices.
-
|