Data acquisition system for measuring hydrogen absorption or desorption thermally activated

RUNCO, J.; MEYER, M.

Junin Pcia. Bs. As.

Congreso; XXI Congreso Argentino de Ciencias de la Computacion; 2015

UniversidadNacional del Noroeste (UNNOBA)

Abstract. This work is part of the activities carried jointly by theLaboratory of Electronics and Experimental Physics group whose lineof research aims to study nanostructured materials suitable forhydrogen storage.Besides the usual characterization techniques (X-ray diffraction ,electron microscopy, differential scanning calorimetry and volumetricmeasurements) [1] [7], in samples containing Fe , it is possible to useSpectroscopy Mössbauer [2] sensitive atomic environment of Fe atoms.In this sense, it would be very important to observe the evolution of theMössbauer signal (constant speed mode) simultaneously with thedetection of hydrogen flow associated with thermally activateddesorption or absorption.For this purpose, a furnace has been constructed based on an annularheater [3] placed in a water cooled stainless steel chamber coupled to aflow meter. Experience involves heating the sample in a controlledmanner by recording the time, temperature and hydrogen flow whilesimultaneously and independently a Mossbauer spectrum is measured.This paper describes the development and implementation of a system thatcontrol and automates the acquisition of the aforementioned parametersThe experiment is controlled by a computer system (or Notebook PC),measuring, controlling, recording and automatically plotting theevolution of the variables of the experiment (temperature and gas flow)versus time. The software was developed in a programming language ofhigh level (Matlab , Delphi) offering the user a typical graphic userinterphase (GUI) visual languages .