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of '•lutfrsecting Storage Rings" (ISR), and the construction of a ten times more 

 powerful accelerator reaching 300 - iOOGeV. The Council approved the execution 

 of the first, the construction of the second, and an increase of about 50% of the 

 budget for the following four years in order to extend the research program and to 

 devote some money to RirD of the third step. It was a memorable session, since it 

 implied the appropriation of almost, one billion Swiss francs, a proof of the enthu- 

 siasm of the member states for the new laboratorj-, not only as an example of the 

 rising scientific significance of Europe, but also as a symbol for Western European 

 unit)'. 



The Intersecting Storage Rings were a new device to get much more effective 

 collisions between particles by having two opposite beams of SOGeV protons collide 

 with one another. It was the first of its kind for protons. No such device was planned 

 in the U.S. at that time. CERN took an innovative step in accelerator construction. 

 Technologically it was a great success; the intensity reached after completion in 1971 

 was much higher than expected. It changed the landscape of High Energ)- Physics. 

 Today and in the future most facilities will be built on that principle at higher 

 energies. The new installations at Fermilab and the SSC accelerator planned for 

 the U.S. are larger versions of the ISR. 



A number of interesting discoveries were made with the ISR, but some were 

 missed. CERN had yet to develop its research tradition to the level of the one in 

 the U.S. in order to exploit its facilities in the best possible way as is the case today. 



In order to accommodate the new facilities the site had to be enlarged. This 

 was done in 1964 by a gift of adjacent land on the French side of the frontier by 



