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



IMPURITY STUDIES EXPERIMENT - B (ISX-B) 

 Oak Ridge National Laboratory (ORNL) 

 U.S. Dept. of Energy 



"Big Science" Descriptor : Magnetic fusion 



Description of Facility/Instrument : ISX-B was a small tokamak. It 

 was designed to study techniques to control impurities. It 

 was later modified to investigate the stability and transport 

 of noncircular, high beta plasmas. Significant contributions 

 were made by the ISX group toward the understanding of the 

 tokamak beta limit and the energy confinement during neutral 

 beam auxiliary heating 



Date of Construction : 1978, decommissioned in 1984 



Construction Cost : 1984 $$ : $20-$30 million 



Present International Cooperation 



Natlonallty(s) of Ownership : U.S. 

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

 Nationality (s) of Management Staff : U.S. 

 Nationality (s) of Researchers : U.S. 



Other Information : ISX-B in its last year was the site of the Joint 

 European Torus (JET) beryllium test. In this test, ISX-B suc- 

 cessfully showed that beryllium could be used as a limiter ma- 

 terial in a neutral beam heated tokamak. This test was performed 

 under contract to the JET undertaking. 



See also JOINT EUROPEAN TORUS (JET). 



