OPTIMIZING SAXS AND AXRD EXPERIMENTS WITH A ROTATING ANODE X-RAY GENERATOR @ UNC

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

Congreso; XVI Conferencia Latinoamericana de Técnicas por Rayos X; 2018

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