78 



Upton, NY., U.S.A. 



TANDEM/ AGS HEAVY ION FACILITY 

 Brookhaven National Laboratory (BNL) 

 U.S. Dept . of Energy 



"Big Science" Descriptor : Nuclear physics 



Description of Facility/Instrument : The Tandem Complex consists of two 

 model MP tandem accelerators which, in the coupled mode, are equiv- 

 alent to a single 20 million volt terminal tandem. Accelerated 

 Ions of over 50 Isotopes of 40 different elements are available 

 for experiments. Using a beam transfer line under construction 

 "from the Tandem Complex to the Alternating Gradient Synchrotron 

 (AGS), heavy ions up to mass 32 (sulphur) will be Injected into 

 the AGS and accelerated up to 14 billion electron volts per 

 atomic mass unit, seven times higher than the heavy Ion energies 

 available at the Bevalac . Accelerated heavy Ions from the Tandem 

 Complex are used for research programs In heavy ion reactions, 

 nuclear structure, and atomic physics. The Tandem/ AGS facility 

 will be used to search for evidence of the quark-gluon plasma or 

 quark matter by the collision of relatlvlstlc heavy ions with 

 heavy targets like uranium. 



Date of Construction ; Tandems 1965-1969, Transfer Line 1984-86 



Construction Cost : 1984 $$ : $47 million plus AGS cost 



Present International Cooperation 



Nationallty(s) of Ownership : U.S. 

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

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

 Natlonallty(8) of Researchers : U.S., England, the Federal 



Republic of Germany, Argentina, Brazil, Denmark, and Israel 



Because nuclear physics Is an international activity, 

 with knowledge freely shared among its practitioners, this 

 laboratory has extensive Interactions with people and insti- 

 tutions in foreign countries. 



More than 95 percent of researchers working at DOE 

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

 approximately equal and reciprocal bases, American nuclear 

 scientists use foreign facilities. 



A heavy ion experiment has been approved for the AGS 

 when the Transfer Line from the Tandem to the AGS is complete. 

 About one-fourth of the participants in the first large 

 experiment planned for the completed Tandem/AGS heavy ion 

 facility are Japanese and, under a U.S. -Japan Accord, about 

 $300,000 in equipment will be furnished by the Japanese. 



Potential for Future International Cooperation : Beam time at this 



facility is available without charge for the best research pro- 

 posals worldwide. 



