Optical Stochastic Cooling with an Arc-Bypass in CESR

TL;DR

This paper proposes an arc-bypass design for Optical Stochastic Cooling in CESR, enabling longer optical delays and potential multi-pass amplification, with stability analysis and feedback system considerations.

Contribution

It introduces an arc-bypass design for OSC in CESR and analyzes stability and feedback mechanisms to enhance cooling performance.

Findings

Arc-bypass provides longer optical delay than traditional designs.

Stability requirements for dipoles are characterized.

Optical feedback can relax stability tolerances.

Abstract

A proposed experiment to demonstrate Optical Stochastic Cooling (OSC) in the Cornell Electron Storage Ring (CESR) based on an arc-bypass design is presented. This arc-bypass provides significantly longer optical delay than the dog-leg style chicane, opening up the possibility of a multi-pass or staged optical amplifier that can achieve the gains required for effective cooling of hadron or heavy-ions. Beyond introducing the arc-bypass, in this paper we study the stability requirements for the dipoles comprising it and investigate the use of an optical feedback system to relax the dipole and light-path stability tolerances.