Gradiometer Based on Nonlinear Magneto-Optic Rotation

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$70,000.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
NNG05CA79C
Agency Tracking Number:
040887
Solicitation Year:
2004
Solicitation Topic Code:
S1.01
Solicitation Number:
n/a
Small Business Information
Southwest Sciences Inc
1570 Pacheco St Suite E-11, Santa Fe, NM, 87505-3993
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
153579891
Principal Investigator:
David Christian Hovde
Principal Investigator
(513) 272-1323
dchovde@swsciences.com
Business Contact:
Alan Stanton
President
(505) 984-1322
astanton@swsciences.com
Research Institution:
n/a
Abstract
This Phase I SBIR project will demonstrate sensitive measurements of magnetic field gradients by nonlinear atomic spectroscopy. The gradients are determined by measuring the magnitudes of the magnetic fields in two atomic vapor cells. A vertical cavity surface emitting laser is used to create an atomic coherence. This coherent state is long lived because of the special construction of the atomic vapor cell. A measurement of the Larmor precession frequency of the coherent state gives a precise measurement of the magnetic field. The field measurement precision should be 0.3 fT in a 1 Hz bandwidth. Two such probes can be tethered at the ends of 80 m cables from a rotating space craft. Typical geophysical gradients of ~ 250 fT can be measured from a single spacecraft with excellent signal/noise. The system uses no cryogenic fluids, no consumable chemicals, and will operate from a few Watts of electrical power.

* information listed above is at the time of submission.

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