Magnetic Measurement Techniques for the Large-Scale Production of Undulator Segments for the European XFEL
- Li, Yuhui
- Abeghyan, Suren
- Viehweger, M.
- Yakopov, M.
- Pflueger, J.
- Berndgen, Karl-Heinz
- Baha-Shanjani, M.
- Deron, G.
- Englisch, U.
- Karabekyan, S.
- Ketenoglu, B.
- Knoll, M.
- Wolff-Fabris, F.
DOIAbstract
The European X-ray free electron laser (EXFEL) facility is currently under construction. Using the principle of self-amplified spontaneous emission (SASE), intense FEL radiation is generated in three gap-tuneable undulator systems called SASE1, SASE2, and SASE3. The electron beam energy of the EXFEL is variable between 8.5 and 17.5 GeV. SASE1 and SASE2 are hard X-ray FELs using planar undulators with a period length of 40 mm, called U40s. By a suitable choice of the beam energy and undulator gap, the wavelength can be tuned from 0.05 to 0.4 nm. SASE3 is a soft X-ray FEL using planar undulators with a period length of 68 mm, called U68s. Under the same conditions, the wavelength can be tuned from 0.4 to 5.2 nm
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