Spontaneous Brillouin Scattering Temperature/Strain Sensors for CICC Superconductors

Award Information
Agency:
Department of Energy
Branch
n/a
Amount:
$100,000.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
DE-FG02-07ER84720
Award Id:
84179
Agency Tracking Number:
82742
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
9030 S. Rita Road, Ste. 120, Tucson, AZ, 85747
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
014750785
Principal Investigator:
JihongGeng
Dr
(520) 799-7441
geng@npphotonics.com
Business Contact:
JimFountain
Mr
(520) 799-7424
fountain@npphotonics.com
Research Institute:
n/a
Abstract
A real-time distributed sensor is needed for superconductivity quench detection in large superconducting magnets, such as those used in plasma fusion confinement systems. This project will use spontaneous Brillouin backscattering to achieve simultaneous spatially-resolved temperature and strain determination in real time in cryogenic environments, by measuring the Brillouin frequency shift and the gain bandwidth simultaneously. The innovation involves the coherent radio frequency (RF) detection of spontaneous Brillouin scattering (SBS) in fiber by using a CW single-frequency Brillouin fiber laser as a frequency-shifted local oscillator. The approach optically moves the coherent Brillouin beat signal from the conventional microwave range into the radio frequency range, enabling a system that can measure the Brillouin frequency shift and the gain bandwidth in real time with advanced digital techniques (such as DSP and FPGA). The immunity of the fiber optic sensor to electromagnetic fields will make it an ideal candidate for a quench detection system and for a general superconducting magnet diagnostic during heat treatment, charging, running, and even during the quenches. Commercial Applications and other Benefits as described by the awardee: The successful accomplishment of this project should revolutionize sensor technologies used for temperature and strain sensing in cryogenic environments. In addition to the fusion application, the technology should find wide use in large facilities such as power plants and particle accelerators. Finally, a real-time distributed temperature/stain sensor could provide an advance warning capability and eventually generate countermeasures that minimize the effects of terrorism, or of natural and accidental events.

* information listed above is at the time of submission.

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