Wave-Optics Modeling of the Optical-Transport Line for Passive Optical Stochastic Cooling

TL;DR

This paper models the optical transport line in optical stochastic cooling using wave-optics simulations to support a Fermilab experiment, estimating energy kicks in electron beams for improved beam cooling.

Contribution

It presents wave-optics simulation results of the optical transport line for OSC, supporting a proof-of-principle experiment at Fermilab's IOTA.

Findings

Simulation estimates of energy kicks in 100-MeV electrons.

Validation of focusing optics for OSC system.

Support for experimental design at Fermilab.

Abstract

Optical stochastic cooling (OSC) is expected to enable fast cooling of dense particle beams. Transition from microwave to optical frequencies enables an achievement of stochastic cooling rates which are orders of magnitude higher than ones achievable with the classical microwave based stochastic cooling systems. A subsytem critical to the OSC scheme is the focusing optics used to image radiation from the upstream "pickup" undulator to the downstream "kicker" undulator. In this paper, we present simulation results using wave-optics calculation carried out with the {\sc Synchrotron Radiation Workshop} (SRW). Our simulations are performed in support to a proof-of-principle experiment planned at the Integrable Optics Test Accelerator (IOTA) at Fermilab. The calculations provide an estimate of the energy kick received by a 100-MeV electron as it propagates in the kicker undulator and interacts with the electromagnetic pulse it radiated at an earlier time while traveling through the pickup undulator.