IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Smooth driving of Mössbauer electromechanical transducers
Autor/es:
A. L. VEIGA; M. A. MAYOSKY; N. MARTÍNEZ; P. MENDOZA ZÉLIS; G. A. PASQUEVICH; F.H. SÁNCHEZ
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer Netherlands
Referencias:
Año: 2010
ISSN:
0304-3843
Resumen:
Quality of Mössbauer spectra is strongly related to the performance of source velocity modulator. Traditional electromechanical driving techniques demand hardedged square or triangular velocity waveforms that introduce long settling times and demand careful driver tuning. For this work, the behavior of commercial velocity transducers and drive units was studied under different working conditions. Different velocity reference waveforms in constantacceleration, constantvelocity and programmablevelocity techniques were tested. Significant improvement in spectrometer efficiency and accuracy was achieved by replacing triangular and square hard edges with continuous smoothshaped transitions. A criterion for best waveform selection and synchronization is presented and attainable enhancements are evaluated. In order to fully exploit this driving technique, a compact microprocessorbased architecture is proposed and a suitable data acquisition system implementation is presented. System linearity and efficiency characterization are also shown.