| Paper |
Title |
Page |
| MOPPH054 |
Small-Aperture Vacuum-Chamber Design for STARS
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134 |
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- J. Bahrdt, V. Duerr, M. Scheer, G. Wuestefeld, A. Meseck
BESSY GmbH, Berlin
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To demonstrate and investigate the cascaded HGHG-scheme proposed for the BESSY Soft X-ray FEL, BESSY plans to build a test-facility called STARS consisting of two HGHG stages. The radiator in the second stage is planned as an APPLE III device which provides the highest field for a circular beam pipe. The minimum Gap of 7 mm translates into a 5 mm inner diameter of the vacuum chamber. An analysis of the impact of the wakefields and the expected vacuum profile is thus required. Results of this analysis an vacuum measurements are presented.
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