66 



Geneva, SWITZERLAND 



LEP DETECT0R-L3 

 CERN 



"Big Science" Descriptor ; High-energy physics 



Description of Facility/Instrument ; L3 is optimized for high resolu- 

 tion measurement of energy and momentum for electrons, gamma 

 rays, and muons at 50 GeV. It uses an 8,000-ton magnet, approxi- 

 mately 12mxl2mxl2m bismuth germanate crystals for electromagnetic 

 calorimetry and uranium for hadron calorimetry. 



Date of Construction : Due in 1988 



Construction Cost : 1984 $$ : $60 million (est.) (See note below.) 



Present International Cooperation 



Nationality(s) of Ownership : 



Nationality(s) of Operational Funding : (Multinational) 



Natlonality(s) of Management Staff ; 



Nationality(s) of Researchers ; L3 Involves about 400 scientists, 

 including about 125 from 12 U.S. institutions. It is the 

 first major physics collaboration involving Western Europe, 

 the Soviet Union, the United States, and the People's Re- 

 public of China. 



Other Information : Note; This detector was not built as a construc- 

 tion project. It was fabricated using capital equipment funds. 

 Therefore, "Date of Construction" and "Construction Cost" in 

 this case refer to this type of fabrication. U.S. funding of 

 the LEP-3 Detector is expected to total $22 million. 



Geneva, SWITZERLAND 



LEP DETECTOR-OPAL 

 CERN 



"Big Science" Descriptor ; High-energy physics 



Description of Facility/ Instrument : The Omni Purpose Apparatus for 

 LEP (OPAL) is designed to cover a wide range of high-energy 

 physics, much of it unexplored, using well-tested and powerful 

 techniques and technologies. 



Date of Construction ; Due in 1988 



Construction Cost : 1984 $$ ; $32 million 



Present International Cooperation 

 Nationallty(s) of Ownership : 



Natlonallty(s) of Operational Funding : (Multinational) 



Natlonality(s) of Management Staff : 



Nationality(s) of Researchers ; OPAL involves about 130 researchers 

 from 21 research institutes in 9 countries, including the 

 United States. 



