CiPo - Home Page

Welcome to Circular Polarization!

The Circular Polarization beamline (CiPo) is primarely characterized by its capability of providing a synchrotron radiation beam of variable polarization (Circular to Linear) in a very broad range of photon energies, 5 to 900 eV. The photon beam is produced by an Electromagnetic Elliptical Wiggler and is dispersed by means of two collinear monochromators, a Normal Incidence Monochromator (NIM) and a Spherical Grating Monochromator (SGM), that alternatively provide two beams in the UV-VUV (5 - 40 eV) and soft X-rays (40 - 900 eV) respectively. The availability of such a wide photon energy spectrum,  together with the polarization selection makes the CiPo beamline extremely flexible for the experimental activity.

Research Highlights

Interplay between Supramolecularity and Substrate Symmetry in the Dehydrogenation of D‑Alaninol on Cu(100) and Cu(110) Surfaces

In this paper we report, by combination of photoelectron spectroscopy, low-energy electron diffraction, and density functional theory calculations, on the adsorption of the D-enantiomer of alaninol on Cu(100) and on Cu(110) with the aim of revealing dehydrogenation in the formation of the molecular chiral superstructure.  J. Phys. Chem. C, 117, 10545 (2013)

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Resonant Circular Dichroism of Chiral Metal-Organic Complex

A sizable enhancement of the circular dichroism in photoelectron spectroscopy has been measured and computed for the metal complex -cobalt(III) tris-acetylacetonate highest occupied molecular orbital state in the region of the Co 3p-3d Fano resonance. PRL, 108, 083001 (2012)

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Thermal switching of the magnetization in an iron film on a magnetically active template MnAs/GaAs(001)

The magnetization direction of a thin Fe film can be fully reversed in a thermal cycle of a few degrees close to room temperature, without making use of an external magnetic field. Phys. Rev. B 81, 220401 (2010)

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Chemical synthesis in acetonitrile containing discharges. Insights from photoionization experiments with synchrotron radiation

The photoinduced ion chemistry of acetonitrile is investigated by using tuneable VUV synchrotron radiation in an octupolar ion guide with mass spectrometric detection. The appearance energies and yields of primary photoions and secondary ionic products are measured. Chem. Phys., 398, 269-277 (2012)

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Substrate-Driven Formation of Bidimensional Arrays of Co Nanocrystals in TiO2 Thin Films

Planar arrays of cobalt nanoparticles embedded in TiO2 layers prepared by pulsed laser deposition on amorphous Si3N4 membranes were studied by means of  high resolution transmission electron microscopy, revealing the presence of Co nanocrystals arranged in bidimensional arrays at the film-substrate interface. J. Phys. Chem. C, 117, 687 (2013)

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Conformational Sensitivity in Photoelectron Circular Dichroism of 3-Methylcyclopentanone

Temperature-dependent photoelectron circular dichroism (PECD) spectroscopy studies of the HOMO state and the carbonyl carbon 1s core-level allowed to separate the contributions of each conformer to the photoelectron dichroism.  ChemPhysChem, 14, 1723 (2013)

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User Area

Proposal Submission

We invite users and collabrators to discuss their proposals with the beamline local contacts well in advance before the submission deadline. This is crucial for a careful assesment of the experiment feasibility and may lead to improvements in the proposed experimental plan. Our website provides a wealth of informaiton on experiment feasibilty and proposal submission. For more info, please vist the CiPo - Info for Users.

Call for proposals

The deadline for proposal submission for beamtime allocation from January 1st to June 30th, 2017 will be September 15th, 2016.

Last Updated on Friday, 27 September 2013 17:02