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Beamline Optics Group

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31 August 2017

First beam in optics hutch

Beam profile on screen at 102 m under different bending conditions of the offset mirrors.
Beam profile on screen at 102 m under different bending conditions of the offset mirrors.

On August 31st, 2017, SwissFEL reached the next milestone by sending the first X-rays into the Optics Hutch. The Aramis undulators of SwissFEL produced SASE-radiation with 1.2 nm wavelength. The beam entered the Aramis-beamline along the pink beam path of Bernina via two vertical offset mirrors and was detected on the diagnostic photon screen at the end of the Optics Hutch. A stable and well shaped beam with a diameter of 1.5 mm was observed. With the bendable offset mirrors we were able to manipulate the profile to enlarge and reduce the vertical its size from 660 µm (rms) down to 260 µm (rms) without introducing distortions. The gas based intensity and position monitor in the frontend could be calibrated and determined a pulse energy of approximately 5 µJ. We are now looking forward to the next commissioning time in October to commission the monochromatic beam path of Bernina and the second branchline Alvra.

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Dr. Rolf Follath
Beamline Optics Group
Paul Scherrer Institut
Telephone: +41 56 310 51 14
E-mail: rolf.follath@psi.ch


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SLS Beamline Optics Group
WSLA/ 124

Uwe Flechsig

Telephone: +41 56 310 4535
E-mail: uwe.flechsig@psi.ch

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