Electron storage ring from Cornell synchrotron?

If Congress approves President Carter’s science budget, Cornell University will proceed with plans to convert the Wilson Laboratory synchrotron facility into an electron storage ring. The President’s budget includes an NSF request for funds to build the storage ring (known as CESR); design and prototype stages are already well advanced. The storage ring is to be housed in the synchrotron tunnel, and—in a novel injection scheme—the synchrotron itself injects electrons into the ring. Maximum design luminosity is ${10}^{32}/{\mathrm{cm}}^2\hspace{0.17em}\sec$ at about 8 GeV, so that the efficient operating range for CESR lies between that of existing storage rings (SPEAR at Stanford and DORIS at DESY) and the PETRA and PEP rings now under construction. Both SPEAR and DORIS have maximum beam energies of about 4 GeV, whereas PEP and PETRA are to have maximum luminosity at energies of about 15 GeV. In the range 4 GeV–8 GeV, the CESR design calls for four times the luminosity of the higher‐energy rings. This is a particularly important consideration because, in storage rings, all experimental areas must operate at the same energy at any one time, and colliding‐beam experiments can take several months, even at high luminosities.

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