112 



San Diego, CA. , U.S.A. 



DOUBLET III-D 



GA Technologies, Inc. 



U.S. Dept. of Energy 



"Big Science" Descriptor : Magnetic fusion 



Description of Facility/Instrument ; This facility was known formerly 



as Doublet III. Doublet III is a major tokamak facility initiated 

 to investigate the confinement characteristics and beta limits 

 of doublet-shaped plasmas. Doublet IIl-D is an upgrade which 

 will explore the properties of highly shaped, high beta plasmas 

 with low aspect ratios. 



Date of Construction ;; 1978 for Doublet III, 1986 for Doublet III-D 



Construction Cost; 198A $$ ; $175-$225 million 



Present International Cooperation 



Nationality(s) of Ownership : U.S. 

 Nationality(s) of Operational Funding: 



U.S. 



Natlonality(s) of Management Staff ; U.S. 

 Natlonality(s) of Researchers ; U.S. -Japan 



A major part of the Doublet program has been accomplished 

 in collaboration with the Japan Atomic Energy Research Institute 

 (JAERI). A five-year agreement which was initiated in August 

 1979 provided for a major upgrading of the base Doublet III 

 capability, and for an equal sharing of the experimental time 

 between the U.S. and JAERI physics teams. The collaboration 

 has proceeded well, with both experimental teams having obtained 

 Important new results. An extension of the five-year agreement 

 which started in September 1984 has provided for continued parti- 

 cipation of several JAERI scientists per year In Doublet III 

 experiments as equal members of a single scientific team. At 

 present, the Japanese have contributed about $70 million to 

 the collaborative effort, of which $55 million is hardware, 

 and the rest is operating expenses. In addition, the Japanese 

 have provided about 25 percent of the scientific manpower on the 

 experiment . 



