Synchrotron frequency spread independence of bunched-beam stochastic cooling at the Fermilab Recycler

Bunched Beam Cooling for the Fermilab Tevatron

Fermilab has been working on bunched beam transverse stochastic cooling in the Tevatron since 1990. In that time much progress has been made in understanding the difficulties of making such a system work with reasonable cooling times. Problems with common mode rejection of longitudinal signals, wide band GHz signal transmission using fiber optics, and specialized optical techniques of recursive...

Beam Position Monitors for the Fermilab Recycler Ring

Fermilab’s new Recycler Ring will recover and cool “used” antiprotons at the end of a Tevatron store and also accumulate “new” antiprotons from the antiproton source. A wideband rf system based on barrier buckets will result in unbunched beam, grouped in one to three separate partitions throughout the ring. A new beam position monitor system will measure position of any one partition at a time,...

Transverse Laser Cooling of a Radio-frequency Bunched Ion Beam in the Storage Ring Tsr

We report on the observation of the indirect transverse laser cooling eeect in a radio-frequency bunched beam of 7.3 MeV 9 Be + ions, stored in the Heidelberg Test Storage Ring and subject to direct longitudinal laser cooling. This bunched scheme ooers particular advantages for producing ultracold beams with unprecedented phase-space densities. The development of beam cooling techniques has eve...

Towards demonstration of electron cooling with bunched electron beam

Beam Manipulation and Compression Using Broadband Rf Systems in the Fermilab Main Injector and Recycler

A novel method for beam manipulation, compression, and stacking using a broad band RF system in circular accelerators is described. The method uses a series of linear voltage ramps in combination with moving barrier pulses to azimuthally compress, expand, or cog the beam. Beam manipulations can be accomplished rapidly and, in principle, without emittance growth. The general principle of the met...