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Digitale Medien

Sensitivity improvement of a Varian E-109 EPR spectrometer with a low noise microwave amplifier (1988)

Dexheimer, S. L. ; Klein, M. P.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 59 (1988), S. 764-766

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Details

ISSN: 1089-7623

Quelle: AIP Digital Archive

Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: The installation of a low noise GaAsFET microwave preamplifier into a Varian E-109 homodyne X-band EPR spectrometer is described, and measurements of the resulting improvement in sensitivity as a function of microwave power are presented. Particular attention is paid to modification of the automatic frequency control (AFC) system to compensate for the preamplifier gain, which would otherwise result in instability of the AFC servoloop and decreased spectrometer performance at moderate microwave power levels. Specific details are provided for modification of the Varian E-102 bridge, but the general approach is applicable to other spectrometers.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.1139824

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