Operational experience with third harmonic RF cavity for improved beam acceleration through transition in the Fermilab Main Ring

An RF cavity operating at three times the frequency of the present Main Ring RF system at Fermilab has been installed to minimize the beam loss and longitudinal emittance (/spl epsivsub l/) growth related to the transition crossing. Tests have been carried out with beam intensities ranging from 3/spl times/10/sup 9/ to 2.3/spl times/10/sup 10/ ppb and /spl epsivsub lspl sime/0.07 eVs. No beam loss conditions have been attained. Attempts have been made to reduce emittance growth after the transition.<>