68 



Hamburg, FEDERAL REPUBLIC OF GERMANY 



PETRA-II 

 DESY 



"Big Science" Descriptor : High-energy physics 



Description of Facility/Instrument ; This Is a storage ring. Its posi- 

 tron beam Is collided with an electron beam, each up to the 23 

 GeV energy level. 



Date of Construction: October 1983 



Construction Cost: 



1984 $$ 



Present International Cooperation 

 Natlonallty(s) of Ownership : 

 Natlonallty(s) of Operational Funding : 

 Natlonallty(s) of Management Staff : 

 Natlonallty(s) of Researchers: 



Hamburg, FEDERAL REPUBLIC OF GERMANY 



HERA 

 DESY 



"Big Science" Descriptor : High-energy physics 



Description of Facility/Instrument : These are storage rings In which 

 an electron beam (30 GeV) will be collided with a proton beam 

 (820 GeV). 



Date of Construction: under construction, due In 1990 



Construction Cost: 



1984 $$ 



$394 million 



Present International Cooperation 



Natlonallty(8) of Ownership : The Federal Republic of Germany, 



Canada, France, Israel, Italy, the Netherlands, and the U.K. 

 Natlonallty(s) of Operational Funding : (Currently 

 Natlonallty(s) of Management Staff : not 

 Natlonallty(s) of Researchers: operating) 



