Une plateforme pour l’analyse de matériaux par faisceaux d’ions à ARRONAX. Étude de l’effet d’humidité sur les échantillons

Abstract

Quantification of soil pollution with methods based on X-ray detection like X-Ray Fluorescence (XRF) suffers of multiple bias (moisture, surface state) especially when it's used for in-situ analysis using portable-XRF. In order to study the effect of moisture on the results of an analysis performed using X-Ray, we have performed studies using high energy PIXE/PIGE at the ARRONAX. Samples were made of sand of different types. High energy PIXE/PIGE allows us to avoid bias from surface state and to focus on moisture effect. It also allows to assess the chemical composition of the sample. Results show a different behavior for each element present in volcanic sand.

Bremsstrahlung X-rays as a non-invasive tool for ion beam monitoring

“…A Faraday cup [14] is adapted to monitor the beam intensity when the beam crosses a thin sample. Non-invasive methods exist like the Ar fluorescence from the air to monitor the beam intensity of the incident beam [15]. It requires less room in the beam path and avoids material activation and damage induced by the irradiation.…”