The feasibility of the use of Overhauser effect in a nuclear free precession magnetometer.

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.

Department dc:contributor.department

Electrical Engineering

Grantor dc:publisher

Monterey, CA; Naval Postgraduate School

Year dc:date.issued

1959

Author dc:creator

• Cooper, D. L.

Language dc:language.iso

en_US

Handle dc:identifier.uri

https://hdl.handle.net/10945/14217

OAI identifier oai:identifier

oai:calhoun.nps.edu:10945/14217