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The XFEL Laser Heater
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Astronomy. Hoegenergifysik. (Acceleratorfysik)
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Astronomy. Hoegenergifysik. (Acceleratorfysik)
2008 (English)In: Proceedings of the European particle Accelerator Conference EPAC08, 2008Conference paper, Published paper (Other scientific)
Abstract [en]

The high-brilliance photo-cathode gun foreseen for the X-FEL will provide beams with extremely small momentum spread that will make the beam susceptible to micro-bunching instabilities which will spoil SASE operation. It is therefore desirable to increase the momentum spread to a level that prevents these instabilities but still is compatible with SASE operation. The laser heater will achieve this by superimposing a transversely polarized laser and the electron beam in a properly tuned undulator, thereby producing a momentum modulation that is smeared out in a dogleg chicane to obtain the desired momentum spread increase. We present the initial design and layout of the laser heater system for the X-FEL in Hamburg.

Place, publisher, year, edition, pages
2008.
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URN: urn:nbn:se:uu:diva-17494OAI: oai:DiVA.org:uu-17494DiVA, id: diva2:45265
Available from: 2008-06-25 Created: 2008-06-25

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