Operation of the Fermilab Accelerator as a Proton Storage Ring

To evaluate its potential for colliding beam experiments a preliminary exploration of the Fermilab main ring operating in the storage ring mode has been made. Beam lifetime and horizontal size measurements have been obtained at 75, 100, 135, and 200 GeV/c. The data, when compared to predictions of a gas scattering model, imply the existence of other additional effects which merit further investigation.