Beamline D1011 - Short information
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Beamline D1011 is a bending magnet beamline covering the energy range 30 to 1500 eV. An adjustable local bump of the electron beam provides out of plane radiation. This makes magnetic circular dichroism (MCD) possible in addition to photoemission and photoabsorption using linearly polarized light. The monochromator is a modified SX-700 PGM of the same design as the monochromator on beamline I411.
Energy resolution tests: (figure 1 (25 kB GIF), figure 2 (177 Kb PDF))
Flux measurements: figure (50 Kb)
Contact persons:
Alexei Preobrajenski, beamline manager
References:
(describing the monochromator):
R. Nyholm, S. Svensson, J. Nordgren and A. Flodström, Nucl. Instr. and Meth. A 246, 267, 1986.
Technical data:
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Source
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Bending magnet, 4.7 mrad
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Pre-focusing optics
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Horizontally focusing spherical mirror.
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Monochromator
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Modified SX-700 monochromator (360 l/mm and 1220 l/mm gratings) with plane-elliptical focusing mirror.
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Energy range
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40 - 1500 eV.
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Energy resolution
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E/dE = 1.5x103 - 1.3x104.
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Photon flux on sample
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~ 1010 - 1011 ph/s.
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Spot size on sample
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1(v) x 3(h) mm2 (front chamber); 1(v) x 1(h) mm2 (back chamber)
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Experimental station
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Two experimental stations are available. The front station is mounted
directly after the exit slit of the monochromator while the back station
is mounted further down-stream and receives radiation passing through
the first end station via a re-focusing mirror system.
The first experimental system consists of separate analyzer and preparation chambers accessible via a long-travel manipulator. The analyzer chamber is equipped with a SCIENTA SES200 electron energy analyzer and an MCP detector for electron yield measurements. The preparation chamber is equipped with LEED, ion sputtering guns, gas-inlet system and a number of optional ports for user owned sample preparation accessories.
The second experimental station is a single chamber system specifically designed for MCD measurements.
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