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Signal processing and general purpose data acquisition system for on-line tomographic measurements (Articolo in rivista)

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Signal processing and general purpose data acquisition system for on-line tomographic measurements (Articolo in rivista) (literal)

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Murari A.; Martin P.; Hemming O.; Manduchi G.; Marrelli L.; Taliercio C.; Hoffmann A. (1997)
Signal processing and general purpose data acquisition system for on-line tomographic measurements
in Review of scientific instruments; AIP PRESS, AMERICAN INSTITUTE OF PHYSICS, WOODBURY, NY 11797-2999 (Stati Uniti d'America)
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Murari A.; Martin P.; Hemming O.; Manduchi G.; Marrelli L.; Taliercio C.; Hoffmann A. (literal)

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11th Topical Conference on High-Temperature Plasma Diagnostics, MONTEREY, CA, MAY 12-16, 1996. La rivista è pubblicata anche online con ISSN 1089-7623. (literal)

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1 Padova Group for Fusion Research, Euratom-Enea-Cnr-Università di Padova Associations, Corso Stati Uniti 4, 35127 Padova, Italy - 2 Physikalisch-Technische Studien GmbH, Leinenweberstrasse 16, D-79108 Freiburg, Germany - (Murari A. (Reprint Author) 1; Martin P. 1; Hemming O. 1; Manduchi G. 1; Marrelli L. 1; Taliercio C. 1; Hoffmann A. 2) (literal)

Titolo

Signal processing and general purpose data acquisition system for on-line tomographic measurements (literal)

Abstract

New analog signal conditioning electronics and data acquisition systems have been developed for the soft x-ray and bolometric tomography diagnostic in the reverse field pinch experiment (RFX). For the soft x-ray detectors the analog signal processing includes a fully differential current to voltage conversion, with up to a 200 kHz bandwidth. For the bolometers, a 50 kHz carrier frequency amplifier allows a maximum bandwidth of 10 kHz. In both cases the analog signals are digitized with a 1 MHz sampling rate close to the diagnostic and are transmitted via a transparent asynchronous xmitter/receiver interface (TAXI) link to purpose built Versa Module Europa (VME) modules which perform data acquisition. A software library has been developed for data preprocessing and tomographic reconstruction. It has been written in C language and is self-contained, i.e., no additional mathematical library is required. The package is therefore platform-free: in particular it can perform online analysis in a real-time application, such as continuous display and feedback, and is portable for long duration fusion or other physical experiments. Due to the modular organization of the library, new preprocessing and analysis modules can be easily integrated in the environment. This software is implemented in RFX over three different platforms: open VMS, digital Unix, and VME 68040 CPU. (C) 1997 American Institute of Physics. (literal)

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