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Gradiometer Based on Nonlinear Magneto-Optic Rotation

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
76653
Program Year/Program:
2005 / SBIR
Agency Tracking Number:
040887
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Southwest Sciences, Inc.
1570 Pacheco Street Suite E-11 Santa Fe, NM 87505-3993
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2005
Title: Gradiometer Based on Nonlinear Magneto-Optic Rotation
Agency: NASA
Contract: NNG05CA79C
Award Amount: $70,000.00
 

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.

Principal Investigator:

David Christian Hovde
Principal Investigator
5132721323
dchovde@swsciences.com

Business Contact:

Alan C. Stanton
President
5059841322
astanton@swsciences.com
Small Business Information at Submission:

Southwest Sciences, Inc.
1570 Pacheco St, Suite E-11 Santa Fe, NM 87505

EIN/Tax ID: 850340320
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No