PAC2013 - List of Authors (Duris, J.P.)

Paper	Title	Page
TUPAC29	Modeling Space Charge Effects in Optical Bunchers	511
	L.V. Ho, J.P. Duris, R.K. Li, P. Musumeci UCLA, Los Angeles, California, USA
	Funding: DOE grant DE-FG02-92ER40693 This paper introduces a 1-D, self-consistent simulation of Inverse Free Electron Laser (IFEL) based optical bunchers. Starting with a review of the conventional (monochromatic) IFEL bunching, we consider slow amplitude variation and multiple harmonics of the fundamental radiation wave. We model two new bunching schemes – the adiabatic and harmonic microbuncher and compare the bunching mechanisms between the optical bunchers as well as space charge effects to the modified IFEL interaction. Here, we present a model approximating the space charge fields and verification of the simulation with the well-known Free Electron Laser (FEL) simulator, Genesis 1.3.

TUPMA16	High Capture Low Energy Spread Inverse Free Electron Laser Accelerator	619
	J.P. Duris, R.K. Li, P. Musumeci, E.W. Threlkeld UCLA, Los Angeles, California, USA
	Funding: This work was supported by DOE grant DE-FG02-92ER40693, Defense of Threat Reduction Agency award HDTRA1-10-1-0073, and University of California Office of the President award 09-LR-04-117055-MUSP. We present the design and construction of a strongly period-, field-, and gap-tapered helical undulator for use in a high-gradient, high-efficiency helical IFEL experiment at Brookhaven ATF. The undulator design achieves efficient acceleration without prebunching by matching the ponderomotive and resonant energy gradients along the length of the interaction for the measured laser parameters. Simulations based on the measured undulator fields and experimental parameters suggest that as much as 43 % of a 50 MeV beam will be accelerated to 94 MeV with 2.3 % rms energy spread.

Paper

Title

Page

Modeling Space Charge Effects in Optical Bunchers

511

L.V. Ho, J.P. Duris, R.K. Li, P. Musumeci
UCLA, Los Angeles, California, USA

Funding: DOE grant DE-FG02-92ER40693
This paper introduces a 1-D, self-consistent simulation of Inverse Free Electron Laser (IFEL) based optical bunchers. Starting with a review of the conventional (monochromatic) IFEL bunching, we consider slow amplitude variation and multiple harmonics of the fundamental radiation wave. We model two new bunching schemes – the adiabatic and harmonic microbuncher and compare the bunching mechanisms between the optical bunchers as well as space charge effects to the modified IFEL interaction. Here, we present a model approximating the space charge fields and verification of the simulation with the well-known Free Electron Laser (FEL) simulator, Genesis 1.3.

TUPMA16

High Capture Low Energy Spread Inverse Free Electron Laser Accelerator

619

J.P. Duris, R.K. Li, P. Musumeci, E.W. Threlkeld
UCLA, Los Angeles, California, USA

Funding: This work was supported by DOE grant DE-FG02-92ER40693, Defense of Threat Reduction Agency award HDTRA1-10-1-0073, and University of California Office of the President award 09-LR-04-117055-MUSP.
We present the design and construction of a strongly period-, field-, and gap-tapered helical undulator for use in a high-gradient, high-efficiency helical IFEL experiment at Brookhaven ATF. The undulator design achieves efficient acceleration without prebunching by matching the ponderomotive and resonant energy gradients along the length of the interaction for the measured laser parameters. Simulations based on the measured undulator fields and experimental parameters suggest that as much as 43 % of a 50 MeV beam will be accelerated to 94 MeV with 2.3 % rms energy spread.