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The microXAS beamline at the Swiss Light Source (SLS) is a microprobe facility optimized for X-ray absorption spectroscopy (XAS), X-ray fluorescence (XRF) and X-ray diffraction (XRD) experiments requiring high spatial resolution. It is designed for monochromatic and pink X-ray beams with high flux and energy resolution combined with dynamic (sub-)micron focusing capabilities.

As a special feature, the beamline also allows microXAS measurement of closed radioactive samples with micro-scale resolution.

Partner: PSI

Website: http://www.sls.psi.ch

Beamline specifics

• In-vacuum undulator (U19) providing high brightness X-rays in an energy range (~4 - ~20keV)

• Rh-coated mirror collimating beam vertically and focusing beam horzontally

• Fix-exit double crystal monochromator equipped with 2 crystal pairs (Si(111); Si(311))v

• Kirkpatrick-Baez (KB) mirror system; design goal > 1x1μm²

beam size adjustable to sample

• Available detector systems:

32-element Ge solid state fluorescence detector
wavelength dispersive X-ray detector system (WDX) for experiments requiring the highest energy resolution
CCD area detector for diffraction experiments

PSI Beamline 3D model of the detector portal.

• Sample manipulator with 6 degrees of freedom:

allowing fast XRF elemental mapping
suited for Gracing-Incidence X-ray Absorption Fine Structure (GI-XAFS) and X-ray Standing Waves (XSW) experiments

• Measurements of radioactive samples

modular concept with local shielding
active specimen containment system suited for micro-beam experiment
hot laboratory available as user lab for sample preparation and sample storage.

PSI Beamline 32 element Ge solid state detector

Access requirements:

Security clearance, medical checks to ensure radiation protection requirements and on-site safety training.

Daniel GROLIMUND

+41 (0) 56 310 47 82

Andre SCHEIDEGGER

+41 (0) 56 310 21 84