Beamline I1011 - Short information
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Beamline I1011 is a soft X-ray beamline, covering the energy range 200 to 2000 eV. The source is an
elliptically polarizing undulator, providing linearly and circularly polarized radiation. This makes
magnetic circular dichroism (MCD) in absorption possible, in addition to photo absorption using linearly
polarized light. The beamline is based on a collimated plane grating monochromator design. This beamline
is currently in a build up phase and propsals should be discussed with the beamline manager before submitting them.
Contact persons:
Gunnar Öhrwall (Beamline manager)
Dimitri Arvanitis (magnetism related research)
Olof Karis (magnetism related research)
Technical data:
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Source
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Elliptically polarizing undulator.
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| Polarization state |
Circular plus or minus, linear horizontal or vertical. |
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Pre-focusing optics
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Sagittaly collimating and tangentially focussing toroidal mirror.
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Monochromator
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Plane grating monochromator (336 l/mm, 1221 l/mm and 1400 l/mm gratings) with plane mirror.
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Focusing optics
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Sagittally focussing cylindrical mirror.
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Energy range
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200 - 2000 eV (horizontal pol.).
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Energy resolution
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E/dE = 3x103 - 1.5x104
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Photon flux on sample
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~ 1012 ph/s/0.1%bw
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Spot size on sample
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0.2(v) x 0.8(h) mm2
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Experimental station
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The end stations is mounted directly after the exit slit. There exists two end stations for the beamline.
One experimental station provides an omnidirectional vector field with a magnitude of up to 0.4 T (long term goal 1T),
intended for XMCD in the electron yield mode and soft X-ray scattering experiments. The chamber is rotatable around
the X-ray propagation axis. The second end station is a UHV system with one preparation chamber equipped with a
sputter gun and LEED with auxiliary ports for user supplied equipment, for example evaporators. The analysis
chamber contain a pair of water cooled coils providing a field up to about 0.1 T. Measurements are conducted
in electron yield mode.
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