An asymmetric linac-ring collider for baryon timelike form factor measurements with existing high energy storage rings

It is considered the possibility of using a positron storage ring like CESR and a low emittance, high duty cycle electron linac or a CW racetrack microtron of 100-200 MeV to realize an asymmetric collider providing a luminosity L/spl sim/10/sup 30/ cm/sup -2/ s/sup -1/. A suitable linac can be based on the superconducting modules developed for the TESLA Test Facility (TTF) at DESY or for CEBAF at TJ Laboratory. The microtron option can be developed similarly to the existing first 2-stage of the Mainz microtron or based on the studies for the RTM of NIST/LANL in late 80's.