56 



accordance with a U.S. -Japan bilateral agreement, there is 

 collaboration between these countries on advanced accelerator 

 R&D and on the Time Projection Chamber (TPC) at the PEP 

 storage ring. 



Potential for Future International Cooperation : Beam time at this 



facility, as at all forefront world high energy physics accelera- 

 tors, is available without charge for the best research proposals 

 worldwide. 



Palo Alto, CA. , U.S.A. 



POSITRON ELECTRON PROJECT (PEP) 



Stanford Linear Accelerator Center (SLAC) 



U.S. Dept. of Energy 



"Big Science" Descriptor : High-energy physics 



Description of Facility/Instrument : This facility is a storage ring 

 with beams Injected by the SLAC linear accelerator for 30 GeV 

 interactions using intersecting beams of 15 GeV electrons and 15 

 GeV positrons. The average radius of the ring is 350 meters. 

 There are six regions for simultaneous experiments. PEP was a 

 joint construction project by SLAC and by the Lawrence Berkeley 

 Laboratory. 



Date of Construction : 1976-1979 



Construction Cost : Original : $80 million 



1984 $$ : $132 million 



Present International Cooperation 



Natlonality(s) of Ownership : U.S. 



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



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



Nationallty(s) of Researchers : (See the SLAC Linear Accelerator 



for a list of international researchers and a discussion of 



international cooperation.) 



Potential for Future International Cooperation : Beam time at this 



facility is available without charge for the best research pro- 

 posals worldwide. 



