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Spatially Offset Raman Spectroscopy for Depth Resolved Propellant Analysis

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-23-C-0103
Agency Tracking Number: N222-126-0013
Amount: $139,993.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: N222-126
Solicitation Number: 22.2
Solicitation Year: 2022
Award Year: 2023
Award Start Date (Proposal Award Date): 2022-11-28
Award End Date (Contract End Date): 2023-05-29
Small Business Information
20 New England Business Center
Andover, MA 01810-1111
United States
DUNS: 073800062
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Katharine Lunny
 (978) 738-8245
Business Contact
 William Marinelli
Phone: (978) 738-8226
Research Institution

Physical Sciences Inc. (PSI) will develop a compact, spatially offset Raman sensor for non-contact, depth resolved measurements of solid rocket motor propellant. The Raman sensor, currently under development at PSI, will use a high throughput spatial heterodyne interferometric spectrometer (SHS). The SHS is 104 more sensitive to Raman photons than a conventional diffraction grating based slit-spectrometer operating with the same spectral resolution. The current Raman design will be modified to include a digital micromirror device (DMD) in order to collect spatially offset Raman signal (SORS) at varying penetration depths within a material. This system will utilize a commercial 785 nm laser, as well as a borescope to increase the sensor’s standoff distance. This will allow for the borescope to be inserted through the nozzle of the motor and interrogate the propellant, avoiding surface contaminants and removing the need for sample preparation prior to measurements. The Phase I effort will focus on functional testing of the SORS breadboard. In parallel, the Phase I will design a prototype mechanical borescope, in order to better inform the final design for a Phase II prototype.

* Information listed above is at the time of submission. *

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