The feasibility of the use of Overhauser effect in a nuclear free precession magnetometer.
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Authors
Cooper, D. L.
Subjects
Advisors
Date of Issue
1959
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
en_US
Abstract
Nuclear Free Precession Magnetometers have been in use since the first successful one was built in 1954. These magnetometers, used to measure the magnitude of the Earth's magnetic field, operate on the relationship that exists between the magnitude of the environmental magnetic field and the frequency of precession of the hydrogen nuclei placed in this field. One of the serious problems that is encountered in the present magnetometers is that they require a strong constant magnetic field, several hundred times that of the Earth's field, to gain the initial conditions for operation. To remove any possible perturbations caused by this large constant field, other means of obtaining the initial conditions were searched for. This paper explores one of the possible solutions to the problem. By using the Overhauser effect, the population gain of favorable proton states may be obtained by exciting the electrons of the free radical ON(SO3)2—and then using the spin-spin coupling of energy to the proton of the aqueous solution. This will provide a large favorable proton population without the attendent large constant field.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering