NDLI: Insertion devices for 4/sup th/ generation light sources

Content Provider	IEEE Xplore Digital Library
Author	Pfluger, J.
Copyright Year	1999
Description	Author affiliation: HASYLAB, DESY, Hamburg, Germany (Pfluger, J.)
Abstract	The next generation of light sources will consist of Free Electron Lasers (FEL's) using the principle of Self Amplified Spontaneous Emission (SASE). They will be driven by Linacs using low emittance photocathodes. Transverse RMS beam sizes are typically 20-50 /spl mu/m and the bunch lengths are of the same magnitude. Worldwide several projects are under construction or in a design phase to cover the whole spectral range down to 0.1 nm. Very long undulators are needed for SASE FELs in order to reach saturation. Their lengths may easily reach 100 m for the X-ray FELs. In order to minimize the total length and maximize output power they must meet two criteria: First, tough magnetic specifications must be fulfilled in order to have optimum overlap between electron and laser beam. Second, additional external strong focusing is required in order to keep the electron beam size small over the whole undulator length. In this contribution problems related with the design of very long undulators are addressed. Alternative ways of providing the strong focusing are outlined and special attention is given to the magnetic design of undulators with integrated strong focusing. As an example the work done at the undulator under construction for the FEL at the TESLA Test Facility in Hamburg is presented.
Starting Page	157
Ending Page	161
File Size	525394
Page Count	5
File Format	PDF
ISBN	0780355733
DOI	10.1109/PAC.1999.795651
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-03-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Undulators Electron beams Free electron lasers Laser beams Structural beams Saturation magnetization Light sources Electron emission Spontaneous emission Linear accelerators
Content Type	Text
Resource Type	Article

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SASE based 4/sup th/ generation light sources and the LCLS project

Energy recovery linacs light sources: an overview

Start-to-end jitter simulations of the linac coherent light source

Layout of the Diagnostic Section for the European XFEL

Coherent spontaneous emission in high gain free-electron lasers

Measurements of exponential gain and saturation of SASE at the APS LEUTL

Laser based synchrotron light sources

Free electron laser amplifier experiment based on 3.5 MeV linear induction accelerator

Design and manufacture of a prototype undulator for the LCLS project

Insertion devices for 4/sup th/ generation light sources

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