[1] It was DESY's second circular accelerator and its first storage ring, with a circumference of nearly 300 m. After construction was completed in 1974, DORIS provided collision experiments with electrons and their antiparticles at energies of 3.5 GeV per beam.
By means of a special array of permanent magnets, the accelerated positrons could now be brought onto a slalom course, increasing the intensity of the emitted synchrotron radiation by a factor of 100 in comparison to conventional storage ring systems.
Among the many studies carried out with the synchrotron radiation generated by DORIS, from 1986 to 2004, the Israeli biochemist Ada Yonath (Nobel Prize in Chemistry 2009) conducted experiments that led to her deciphering the ribosome.
[2] OLYMPUS used the toroidal magnet and pair of drift chambers from the MIT-Bates BLAST experiment along with refurbished time-of-flight detectors and multiple luminosity monitoring systems.
Two-photon exchange may resolve the proton form factor discrepancy between recent measurements made using polarization techniques and ones using the Rosenbluth separation method.