Browsing by Author "Escarate, P."

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    Assessment of Three Spectroscopic Techniques for Rapid Estimation of Calcite in Copper Ore
    (IEEE, 2010) Escarate, P.; Guesalaga Meissner, Andrés; Albertini, Valerio Rossi; Bailo, Daniele
    This paper presents the assessment of three spectroscopic techniques, i.e., Raman spectroscopy (RS), ultraviolet fluorescence (UVF) spectroscopy, and energy-dispersive X-ray diffraction (ED-XRD), for measuring calcite (CaCO3) concentration in copper ore. The results for the three methods are compared in terms of their correlation coefficient R2 and prediction error (root-mean-square error of prediction, RMSEP). These approaches substantially shorten the measurement time with respect to current laboratory procedures from 300 min down to 1,15, and 9 min for RS, ED-XRD, and UVF, respectively, while preserving a good accuracy level (RMSEP <
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    Beam shaping for laser-based adaptive optics in astronomy
    (2014) Bechet, Clementine Marie Zelia; Guesalaga Meissner, Andrés; Neichel, B.; Fesquet, V.; González Núñez, Héctor; Zuñiga, S.; Escarate, P.; Guzmán Carmine, Christian Dani
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    Energy dispersive X-ray diffraction spectroscopy for rapid estimation of calcite in copper ores
    (PERGAMON-ELSEVIER SCIENCE LTD, 2009) Escarate, P.; Bailo, D.; Guesalaga, A.; Albertini, V. Rossi
    This article presents a novel technique for measuring the concentration of calcite in copper ore samples using energy dispersive X-ray diffraction (ED-XRD). The results are compared with ultraviolet fluorescence spectroscopy (UVF) for the same group of samples. This approach substantially shortens the measuring time with respect to the current laboratory procedures from 300 min down to 15 min and 9 min for energy dispersive X-ray diffraction and ultraviolet fluorescence spectroscopy, respectively, while preserving a good accuracy level (RMSE < 0.577).
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    Rapid measurement of calcite concentration in copper ore using fluorescence spectroscopy
    (PERGAMON-ELSEVIER SCIENCE LTD, 2006) Escarate, P.; Guesalaga, A.; Otero, A.
    This work presents the development of a rapid technique for measuring the concentration of calcite in oxidized copper ore. The instrument is based on fluorescence spectroscopy in the visible and infrared range and is excited with a UV-LW lamp. The measurement takes substantially shorter times than standard procedures.
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    X-ray fluorescence spectroscopy for accurate copper estimation
    (2015) Escarate, P.; Hein, R.; Durán Toro, Mario; Ramaciotti Morales, Pedro