Electricity: measuring and testing – Particle precession resonance – Using an electron resonance spectrometer system
Patent
1987-11-20
1989-03-14
Levy, Stewart J.
Electricity: measuring and testing
Particle precession resonance
Using an electron resonance spectrometer system
333 20, G01R 3320
Patent
active
048127639
ABSTRACT:
An electron spin resonance spectrometer comprises a resonator containing a sample and arranged in a magnetic field of constant strength and high homogeneity. A microwave bridge can be supplied with microwave energy in the form of an intermittent signal. Measuring signals emitted by the resonator are supplied to a detector and a signal evaluation stage. A line provided between a microwave source and the microwave bridge is subdivided into parallel pulse-shaping channels, one of them containing a phase shifter, an attenuator and a switch for the signal passing through the pulse-shaping channels. In order to be able to set, if possible, an unlimited plurality of pulse sequences for experiments of all kinds, the pulse-shaping channels are supplied in equal proportions from the line by means of a divider. All pulse-shaping channels are provided with a phase shifter and an attenuator. The pulse-shaping channels are re-united by means of a combiner arranged before the input of a common microwave power amplifier.
REFERENCES:
Mailer et al., "Computer-Controlled . . . Spectrometer", Rev. Sci. Instrum. 56(10), Oct. 1985.
"An Active Microwave Delay Line for Reducing the Dead Time in Electronic Spin Echo Spectrometry" by Narayana, published by the Department of Chemistry of the University of Houston, Tex., as early as in 1982.
Bruker Analytische Mebtechnik GmbH Silberstreifen
Levy Stewart J.
O'Shea Kevin D.
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