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Argonne, IL., U.S.A. 



ARGONNE TANDEM/LINAC ACCELERATOR SYSTEM (ATLAS) 

 Argonne National Laboratory (ANL) 

 U.S. Dept. of Energy 



"Big Science" Descriptor : Nuclear physics 



Description of Facility/Instrument : ATLAS Includes two component 



parts, a tandem Van de Graaff with a nine million volt terminal 

 potential, and the ATLAS superconducting linear accelerator 

 (llnac) which raised the accelerating power to the equivalent of 

 a 50 million volt (terminal) tandem. Heavy ion beams are used 

 for studies of high-spin nuclear states, fission and fusion re- 

 actions, quasi-elastic and deep inelastic reactions, and mass 

 spectrometry. Technical performance of the accelerator em- 

 phasizes precise timing and energy stability. 



Date of Construction : Tandem in 1959-61, ATLAS llnac in 1982-85 



Construction Cost : 1984 $$ : $27.5 million 



Present International Cooperation 



Nationallty(s) of Ownership : U.S. 



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



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



Natlonallty(s) of Researchers : U.S., Canada, England, Denmark, 



the Federal Republic of Germany, Japan, Israel, the People's 

 Republic of China, France, Finland, Australia, Brazil, 

 Sweden, Belgium, Poland, and Hungary 



Because nuclear physics is an international activity, 

 trlth knowledge freely shared among its practitioners, this 

 laboratory has extensive Interactions with people and insti- 

 tutions in foreign countries. 



>fc>re than 95 percent of researchers working at DOE 

 nuclear physics accelerators are from U.S. institutions. On 

 approximately equal and reciprocal bases, U.S. nuclear sci- 

 entists use foreign facilities. 



Potential for Future International Cooperation : Beam time at this 



facility Is available without charge for the best research pro- 

 posals worldwide. 



