Acousto‐optic spectrum analyzer for plasma diagnostics
作者:
J. H. Irby,
D. Beals,
期刊:
Review of Scientific Instruments
(AIP Available online 1987)
卷期:
Volume 58,
issue 8
页码: 1387-1392
ISSN:0034-6748
年代: 1987
DOI:10.1063/1.1139419
出版商: AIP
数据来源: AIP
摘要:
An acousto‐optic rf spectrometer (AOS) has been designed and constructed for use on the CONSTANCE B and TARA mirror experiments at MIT. The AOS is an analog preprocessor of data that can come from a variety of sources, including rf probes and microwave/laser scattering experiments. The output of the AOS is the Fourier transform amplitude of the input in a parallel format suitable for computer acquisition. The spectrometer, having a bandwidth of 500 MHz and a resolution of 1 MHz, together with its receiver, is capable of looking at fluctuations anywhere in the frequency range of a few MHz up to 4 GHz. Power levels of a few nanowatts can be detected. Complete 500‐MHz‐wide spectra can be processed and acquired at the rate of 1 every 10 &mgr;s. The optical components, receiver, and data‐acquisition interface will be discussed, and initial data taken on the CONSTANCE B experiment will be shown.
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