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Ingá

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Inga is a tree of the Inga genus with diversity center in the Amazon rainforest. (Photo: João Medeiros )

OVERVIEW

Inga is a beamline that would originally explore the characterization of materials by Inelastic X-ray Scattering (IXS), where there is a change of energy of the photons scattered in interactions with matter. Part of the original scientific program of the Ingá beamline was transferred to the EMA beamline. The design of this beamline is being re-evaluated.

Conventional X-ray diffraction and scattering techniques assume that the energy of the scattered photons is equal to the incident photons, that is, the scattering is elastic. The Inga beamline will explore the characterization of materials by inelastic scattering (IXS), in which the interactions between photons and matter cause a change in energy (or momentum) of the scattered photons.

All of these experiments can be combined with instrumentation to simulate high pressure environments, such as those used in the Ema micro-spectroscopy beamlinem, and laser synchronization techniques to study the time evolution of the first moments of physical, chemical and biological phenomena. This will allow spectroscopic investigation of the absorption edge of light elements in high pressure environments or temporal evolution of elementary excitation.

Inelastic scattering experiments require a high intensity of X-rays. Therefore, two Undulators in series are used to generate a high flux of photons in the sample. Furthermore, Inga will be able to operate in two focus modes. The first will have the capacity for micro-focus and scan, with beam size of order of 10 micrometres x 10 micrometres order, being dedicated to any IXS experiments requiring micro-focusing, for example by Raman mapping. The second mode will have a line type focus of 10 micrometres x 1 micrometres dedicated to direct tomography experiments with contrast of light elements by Raman X-ray Scattering.