Published June 12, 1961 | Version v2
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Theory of a metrology for the earths magnetic field based on the resonance of polarised atomic nuclei (1962)

Creators

  • 1. Commissariat a l'Energie Atomique, Grenoble (France). Centre d'Etudes Nucleaires

Description

The problems presented by the metrology of the earths field are studied from two points of view. a. The first, purely physical, concerns the study of NMR transducers in their role for the transformation of the magnetic field into a frequency. The possibilities and limitations are outlined. The use of an equivalent model is introduced systematically in the considerations of NMR phenomena, this makes it possible to treat all problems of interaction between a spin system and an electric detection system in a unified form. b. The other point of view concerns the restitution of the nuclear signal frequency in the form of a directly perceptible observable. The treatment of information is considered from a statistical angle, which leads to the study of an optimisation process concerning the linearization of the measurement as well as the minimisation of noise effects. (author)

Availability note (English)

Available from INIS in electronic form

Abstract (French)

Les problemes que pose la metrologie du champ terrestre sont etudies sous un double aspect: a. L'un, purement physique, concerne l'etude des traducteurs a RMN dans leur role de transformation du champ magnetique en une frequence. On en degage les possibilites et les limitations. L'emploi d'un modele equivalent est introduit de maniere systematique pour rendre compte des phenomenes de RMN, ce qui permet de traiter sous forme unifiee tous les problemes d'interaction entre un systeme de spins et un systeme electrique de detection. b. L'autre aspect concerne la restitution de la frequence du signal nucleaire sous la forme d'une observable directement perceptible. On considere le traitement de l'information sous l'aspect statistique, ce qui amene a etudier un processus d'optimisation concernant la linearisation de la mesure aussi bien que la minimisation des effets des bruits. (auteur)

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Additional details

Additional titles

Original title (French)
Theorie d'une metrologie du champ magnetique terrestre basee sur la resonance de noyaux atomiques polarises (1962)

Publishing Information

Imprint Pagination
175 p.
Report number
CEA-R--2035

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
37045183
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
FREQUENCY MEASUREMENT; FREQUENCY MODULATION; GEOMAGNETIC FIELD; GEOPHYSICS; NUCLEAR MAGNETIC RESONANCE; POLARIZATION; SIGNAL-TO-NOISE RATIO; SIGNALS; SPIN; TRANSDUCERS
Descriptors DEC
ANGULAR MOMENTUM; DIMENSIONLESS NUMBERS; MAGNETIC FIELDS; MAGNETIC RESONANCE; MODULATION; PARTICLE PROPERTIES; PHYSICS; RESONANCE

Optional Information

Notes
89 refs.