Optimizing SAXS and AXRD experiments with a rotating anode X-ray generator @UNC

S. LIMANDRI; S. CEPPI; V. GALVÁN JOSA; G. TIRAO

Pucón

Conferencia; XVI Latin American Seminary of Analysis by X-ray Techniques ? SARX; 2018

A rotating anode XR generator was recently received and installed atthe Nuclear and Atomic Spectroscopy Group at National University ofCórdoba (UNC). This source is a RIGAKU RU 200 with 12kW maximumpower and Cu anode (interchangeable) and will allow us to performexperiments demanding high intensity, a very collimated and/ormonochromatic XR beam, impossible to perform with a conventional source.The equipment also allows focalizing the electron beam impinging on theanode, which allows controlling the size of the XR source (Figs 1-3).The X-Ray source, originally dedicated to measurements of XRD ofmacromolecules was received in donation by CCT Bahía Blanca (Argentina),after 20 years of having fallen into disuse. The following upgrades weredone in order to became the equipment operative:Incorporation of a new vacuum pump; construction and installation ofrefrigerating circuits; replacement of all the vacuum seals. Currently, we areinstalling the radiological protection, including aperture sensors.Currently we are optimizing two experiments in the two independentXR exits: small angle scattering (SAXS) and anomalous diffraction (AXRD).Other experiments are planned to be included in a near-future: Totalreflection X-Ray Fluorescence (TRXRF), Grazing incidence X-Ray diffraction(GIXRD) and Spatially resolved X-Ray Diffraction (SRXRD).We present the designs and technical specifications for the constructionof the mentioned lines, the first tests and the future applications.