REDUCTION OF PROTON LOSSES IN HERA BY COMPENSATING TUNE RIPPLE DUE TOPOWER-SUPPLIES

We present a novel method of modifying the proton losses in hadron col liders by generating external tune modulations without interfering wit h the normal luminosity operation. The main application of the method is to reduce the proton loss rates, to minimize the background rates i n the colliding beam experiments of HERA. Another potential applicatio n is to control the particle diffusion in the beam halo without affect ing the beam core, which might provide a useful option for the interna l fixed target experiment in HERA.