Matthew Andorf

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

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 subsystemcritical 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 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.

Light transport and amplification for a proof-of-principle experiment of Optical Stochastic Cooling

LIGHT TRANSPORT AND AMPLIFICATION FOR A PROOF-OF-PRINCIPLE EXPERIMENT OF OPTICAL STOCHASTIC COOLING M. B. Andorf, Ph.D. Department of Physics Northern Illinois University, 2018 Dr.Philippe Piot, Director The Optical Stochastic Cooling (OSC) is a proposed technique that holds promise for the cooling of heavy-ions and dense TeV scale hadron beams. In the OSC a particle radiates a short wave-packet in an upstream ”pickup” undulator and is made to interact with its own radiation in a downstream ”kicker” undulator providing a corrective energy kick. In this thesis we present formulas and wave-optics simulations to compute the single-particle kick amplitude. The wave-optics simulations are further used to model amplification of the pickup radiation in a solid-state gain medium. This research was carried out in preparation of a proof-of-principle demonstration of the OSC in Fermilab’s Integrable Optics Test Accelerator (IOTA) using 100 MeV electrons. NORTHERN ILLINOIS UNIVERSITY DE KALB, ILLINOIS

Amplifier for optical stochastic cooling

The amplification of electromagnetic radiation emitted from charged-particle beams can be used for beam cooling. We discuss our progress to develop such a system using undulator radiation.