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Oak Ridge, TN. , U.S.A. 



ADVANCED TOROIDAL FACILITY (ATF) 

 Oak. Ridge National Laboratory (ORNL) 

 U.S. Dept. of Energy 



"Big Science" Descriptor : Magnetic fusion 



Description of Facility/Instrument : ATF Is a torsatron stellarator. 

 Its purpose is to investigate plasma behavior at high toroidal 

 beta under "steady-state" conditions and to explore a high beta 

 mode known as the "second stability" regime. 



Date of Construction : 1987 



Construction Cost : 1984 $$ : $50-$70 million 



Present International Cooperation 



Nationality(s) of Ownership : U.S. 



Nationality(s) of Operational Funding : U.S. (planned) 

 Natlonallty(s) of Management Staff : U.S. (planned) 

 Nationality(8) of Researchers : U.S. (planned) 



Potential for Future International Cooperation : ATF is the U.S. 



facility from which active collaboration is based in the stel- 

 larator area. The United States is now completing negotiations 

 on two agreements formalizing productive work in this field. 

 One is an International Energy Agency agreement with the European 

 Community (specifically with the Federal Republic of Germany) 

 and the other Is an agreement with Spain. 



