Recent advances in design and R&D for the Quasi-Poloidal Stellarator experiment
- 作者：J.F. Lyon ; B.E. Nelson ; R.D. Benson ; L.A. Berry ; M.J. Cole ; P.J. Fogarty ; K.D. Freudenberg ; P.L. Goranson ; J.H. Harris ; P. Heitzenroeder ; A.D. Lumsdaine ; M.A. Madhukar ; G.H. Neilson ; T.E. Shannon ; D.
- 关键词：Stellarator ; Magnet ; Magnet R& ; D
- 刊名：Fusion Engineering and Design
- 出版年：2007
- 期刊代码：22_09203796
- 类别：pw
- 出版时间：October 2007
- 卷：82
- 期：5-14
- 页码：575-582
- 文件大小：1886 K
摘要
Engineering innovation is required to reduce cost and risk in fabrication for the Quasi-Poloidal Stellarator being developed to test key physics issues at very low plasma aspect ratio. Complex, highly accurate, stainless steel modular coil winding forms are cast and machined; conductor is wound directly onto the winding forms; a vacuum-tight cover is welded over each coil pack; the coils are vacuum pressure impregnated; the completed coils are installed in an external vacuum vessel. An internally cooled, compacted cable conductor that can be wound into complex 3-D shapes was developed. The largest and most complex of the winding forms has been cast using a patternless process (machined sand molds) and a high-temperature pour. The resulting casting required <1/10 the major weld repairs of similar sand castings using conventional patterns. As a result, QPS differs significantly in design and construction from other toroidal devices.