quadrupole

Paper	Title	Other Keywords	Page
MOPPH048	ARC-EN-CIEL Project Electron Beam Dynamics	electron, emittance, linac, focusing	118
	M.-E. Couprie, A. Loulergue, C. Bruni SOLEIL, Gif-sur-Yvette
	ARC-EN-CIEL project is based on the development of fourth generation light source of high brilliance and tunable in the UV-X domain. The project will evolved into three phases leading to different light performances: first and second phases are in single pass configuration with energy of 220 MeV and 1 GeV respectively, while third phase comports recirculation loops at 1 GeV and 2 GeV. For delivering a high brilliance light source with high peak power short pulses, the high charge electron beam should have subpicoseconde duration with low emittance and energy spread. In order to keep optimal slice characteristics for light production, phase space non linearities due to optics aberrations and collective effects should be minimized. In ERL configuration, a critical consequence of collective effects is the Beam Break Up instability, which forms a feedback loop between the beam and the cavities. This contribution aims at presenting the electron beam dynamics for the ARC-EN-CIEL project in single pass and ERL configuration, especially on the conditions for minimizing non linearities and Beam Break Up instability.
WEBAU05	Magnetic Measurements, Tuning and Fiducialization of LCLS Undulators at SLAC	undulator, alignment, background, linac	314
	V. Kaplounenko, A. W. Weidemann, Z. R. Wolf, Yu. I. Levashov SLAC, Menlo Park, California
	A new Magnetic Measurement Facility (MMF) has been built at Stanford Linear Accelerator Center (SLAC) to measure, tune and fiducialize undulators for Linac Coherent Light Source (LCLS) project. Climate controlled MMF utilizes two magnetic measurement benches and a large Coordinate Measurement Machine (CMM) and provides a throughput of one undulator segment a week. Magnetic measurement, tuning and fiducialization process is being presented and first tuning results are discussed.
	Slides