127 



Naka, JAPAN 



JT-60 



Japan Atomic Energy Research Institute ( JAERI)-Naka 



Japanese Atomic Energy Research Institute (JAERI) 



"Big Science" Descriptor : Magnetic fusion 



Description of Facility/Instrument ; JT-60 Is one of the four largest 

 tokamaks in the world. A feature that Is unique to JT-60 Is Its 

 outboard pololdal dlverter. It Is equipped with neutral beams, 

 Ion cyclotron radio frequency (ICRF), and lower hybrid current 

 drive and heating. This makes Its auxiliary heating systems the 

 most extensive of all the large tokamaks. JT-60 is also the only 

 large tokamak that is capable of doing noninductlve current 

 drive. On the other hand, it is not equipped to handle tritium, 

 which means that the Japanese will have to rely on JET and TFTR 

 (discussed previously) for their alpha particle physics. 



Date of Construction ; 1985 



Construction Cost ; $947 million in current year dollars 



Present International Cooperation 



Natlonallty(s) of Ownership : Japan 

 Nationality(s) of Operational Funding : Japan 

 Nationallty(s) of Management Staff : Japan 



Natlonallty(s) of Researchers ; Japan. At present, there is less 

 than one man-year in personnel exchanges with JT-60. 



Other Information : Construction on JT-60 began In 1978 and will be com- 

 pleted in 1985. Most of the funds for construction were spent 

 between 1980 and 1983. The budgeted cost of the facility in 

 current (year of expenditure) funds is 270 billion yen. There 

 may be some expenditures not included in this sum, but they are 

 minor. DOE's estimate of the cost in current U.S. dollars is 

 $947 million. 



