A superconducting magnet spectrometer was launched up to an altitude of 36.5km by using a large bolloon-borne in order to observe high energy cosmic rays and to search for primordial antimatter in the Universe. The first balloon-borne experiment was successfully carried out in Northern Canada in summer of 1993. Development of the superconducting magnet spectrometer and progress of the baloon-borne experiment are described in this report.
This paper presents an overview of the superconductive magnetically levitated system (maglev) program in the United States. Although the U.S. Maglev Program was once stopped in 1975, the increasing congestion in the U.S. transportation system in the late 1980's and other factors have led to a reawakening of national interest in Maglev technology. In 1990 the National Maglev Initiative (NMI) was established, and it funded 27 studies related to Maglev technologies and economics, and four System Concept Definition (SCD) studies. Technical requirements in the SCD and technologies in the SCD systems designed by teams led by Bechtel Corp., Foster-Miller Inc., Grumman Aerospace Corp. and Magneplane International, Inc. will be reviewed. A plan for the Maglev prototype development program proposed in the NMI program will be also presented.
As YBCO oxide superconductor has high critical temperature and high critical magnetic field, a great deal of research has been conducted due to great potential applications. The evaluation of the mechanical property of YBCO system is therefore important in addition to superconducting properties. However such studies are few, and the fracture mechanism of YBCO has not been investigated. In this paper, the Br