Core Level Absorption & Emission Spectroscopies (CLÆSS) Beamline

This beamline was initially named 'XAS' (X-ray Absorption Spectroscopy). The name was changed in May 2009.

The CLÆSS (pronounced [kla:s]) beamline will provide a simultaneous and unified access to two complementary techniques: absorption and emission spectroscopies. The energy range is 2.4 – 65 keV. At a later stage, x-ray magnetic circular dichroism (XMCD) technique with quarter-wave plates will be added.

The sample infrastructure will include cryostats and vacuum chambers for low-temperature/low-energy measurements; gas lines, exhausts, poison gas sensors and ample space for in-situ chemical/catalytical research. A sample preparation room in close proximity to the beamline (glove box, pellet press, fume cupboards, analytical balance etc.) is planned.

Status

Under commissioning

Staff

Konstantin Klementiev: beamline scientist
Gemma Guilera: beamline scientist
Yury Nikitin, Ricardo Valcárcel, Francesc Farré, Carles Colldelram, Claude Ruget: mechanical engineering
Zbigniew Reszela, Guifré Cuní, Julio Lidón, David Fernández: computing & controls

Technical Description

• Source - Multipole Wiggler
• Front-end
• Optics layout
• Optical alignment
• Beamline performance

Experimental station

• Layout
• Core Level Emission Analyzer and Reflectometer (CLEAR)
• Sample environment
• Beamline control software

Software

• Software maintained at the beamline

Miscellaneous

• XAFS course (14-15 September 2009)
• Links and various documents

Documentation

• Original Proposal of the beamline (2005)
• Conceptual Design of ALBA XAS beamline (2006)
• Conceptual Design of X-ray emission spectrometer (2007)
• Conceptual Design Report "Requirements for quarter-wave plates on ALBA XAS beamline" (2007)
• Conceptual Design Report "Sample Environment at ALBA XAS beamline" (2008)