Book ChapterDOI
Automatic Frequency Control Systems
T. H. Wilmshurst
- pp 168-216
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TLDR
In this paper, a frequency control system for E.S.R. spectrometers is proposed to prevent variations in the frequency of the klystron and in the resonant frequency of spectrometer cavity from occurring.Abstract:
One of the problems to overcome when designing an E.S.R. spectrometer is to prevent variations in the frequency of the klystron and in the resonant frequency of the spectrometer cavity from occurring. These variations degrade the performance of the spectrometer in one way or another, and various automatic frequency control systems have been devised to prevent this from happening.read more
Citations
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Journal ArticleDOI
Anomalous Magnetic Anisotropy and Resonance Linewidth in CdCr2S4
B. Hoekstra,R. P. van Stapele +1 more
TL;DR: The magnetic anisotropy and ferromagnetic resonance linewidth of CdCr2S4 single crystals were studied a t helium temperatures as discussed by the authors, and it was shown that impurity ions with near-crossing levels such as Fez+ on the tetrahedral site and possibly Cr2+, on the octahedral site cannot be responsible for the anomalous behaviour of non-stoichiometric CcCr2s4 reported in the literature.
References
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Journal ArticleDOI
Electronic frequency stabilization of microwave oscillators.
TL;DR: Two circuits for use to control the frequency of a microwave oscillator by an external high Q cavity are described, and a technique by which the frequency‐stabilization systems could be used to investigate the structure of microwave absorption spectra is suggested.
Journal ArticleDOI
Automatic frequency control for an electron spin resonance spectrometer
TL;DR: In this paper, a frequency control system is described which will lock the frequency of a reflex klystron to the sample cavity of an electron spin resonance spectrometer using standard components, has large bandwidth and produces no observable broadening of absorption lines.
Journal ArticleDOI
Automatic frequency control for klystrons and a calibrator for microwave spectrometers
TL;DR: In this paper, the same cavity-modulation method can be applied to the specimen cavity of an electron spin resonance spectrometer to provide a calibrating signal which simulates absorption or dispersion in the specimen.