PULSED ABSORPTION DIFFRACTOMETER FOR DETECTING TRACE SPECIES

Award Information
Agency:
National Science Foundation
Branch
n/a
Amount:
$49,929.00
Award Year:
1993
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
21613
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Science Research Laboratory
15 Ward St, Somerville, MA, 02143
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Allen Flusberg
(617) 547-1122
Business Contact:
() -
Research Institution:
n/a
Abstract
WITH THE INCREASE IN ATMOSPHERIC POLLUTION AND A NEW, GROWING PUBLIC AWARENESS OF RESULTING ENVIRONMENTAL DAMAGE, THERE IS A NEED FOR NEW TECHNOLOGY TO MEASURE THE CONCENTRATION OF TRACE SPECIES IN THE ATMOSPHERE. EXTRACTIVE METHODS, IN WHICH A SEALED SAMPLE OF AIR IS ANALYZED IN A LABORATORY, ARE EXPENSIVE AND INAPPLICABLE TO CONTINUOUS, IN SITU MONITORING OF CONCENTRATIONS. THE DEVELOPMENT OF AN INSTRUMENT CALLED A PULSED ABSORPTION DIFFRACTOMETER (PAD) IS BEING DEVELOPED TO FILL THIS NEED. THE BASIS OF THIS INSTRUMENT IS THE DETECTION OF A TRANSIENT, VOLUMETRIC DIFFRACTION GRATING THAT IS FORMED AFTER A PULSED LASER BEAM IS ABSORBED BY TRACE SPECIES PRESENT IN THE ILLUMINATED REGION. THE PAD IS SENSITIVE TO PARTS-PER-TRILLION TRACE-GAS CONCENTRATIONS, 2-3 ORDERS OF MAGNITUDE BETTER THAN INSTRUMENTS BASED ON OTHER APPROACHES TO MONITOR TRACE SPECIES IN THE FIELD.

* information listed above is at the time of submission.

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