Damping Ring for Test the Optical Stochastic Cooling

A compact ring can be used to verify the OSC principles. Possible parameters of such ring described in this paper. INTRODUCTION After proposal to extend Stochastic Cooling method [1] to optical bandwidths [2], the idea about testing this method on specially designed compact damping ring was described soon after [3]. It was stressed there, [3], that under rates of cooling, deviled by OSC, the method can be interesting for protons, electrons/positrons, muons, as well as for multi charge ions. Later, application of OSC to the cooling of multi-charge ions was recognized as having advantage due to coherent radiation of ions ~Z [4]. For electron and positron beams the method allows drastic reduction of final temperature with an optical amplifier of intermediate complexity. There was an idea to apply the OSC cooling to search fo r Fermi-degeneration in relativistic beam [5]. Complex introduced in [3] represented in Fig. 1 below. Figure 1: The damping ring with injection complex proposed for testing OSC [3]. One of the peculiarities was a possibility for isochronous bend with three-magnet system. Ten years later the similar bend was described in [6]. Here the influence of the quantum fluctuations in bends to the beam energy spread considered also. Latest interest to this subject initiated by Vladimir Shiltsev.