PRELIMINARY EVALUATION OF NEW UV/VUV RADIOMETRIC STANDARDS

Award Information
Agency: Department of Commerce
Branch: N/A
Contract: N/A
Agency Tracking Number: 14680
Amount: $34,929.00
Phase: Phase I
Program: SBIR
Awards Year: 1991
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Visidyne Inc
Corporate Place, South Bedford St, Burlington, MA, 01803
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Gary Galica
 (617) 273-2820
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THERE ARE ONLY A FEW RADIOMETRIC STANDARDS AVAILABLE IN THE 115-350 NM WAVELENGTH REGION. AMONG THEM ARE THE ARGON MINI-ARC AND THE DEUTERIUM LAMP. BOTH LAMPS PROVIDE STABLE SOURCES OF UV/VUV RADIATION, AND CAN BE CALIBRATED BOTH IN RADIANCE AND IRRADIANCE. HOWEVER, EACH HAS DISADVANTAGES THAT LIMIT ITS USEFULNESS AS A BENCHTOP OR SPACE-QUALIFIED STANDARD. ONE POSSIBLE ALTERNATIVE SECONDARY RADIOMETRIC STANDARD FOR THE UV/VUV IS THE RF-EXCITED ELECTRODELESS DISCHARGE LAMP. THESE LAMPS ARE SMALL, HAVE LOW INPUT POWER REQUIREMENTS, HAVE A LONG LIFETIME, AND HAVE BEEN ADAPTED FOR SPACEFLIGHT. BY VARYING THE RARE GAS FILL PRESSURE (FROM A FEW TORR TO TENS OF TORR) EITHER CONTINUUM RADIATION OR SPECTRALLY PURE LINE RADIATION CAN BE GENERATED IN THE UV AND VUV. PRELIMINARY MEASUREMENTS ON A KRYPTON VUV CONTINUUM LAMP INDICATE THAT THE LAMPS ARE LONG-LIVED AND STABLE ENOUGH TO BE CONSIDERED AS POSSIBLE RADIOMETRIC STANDARDS. THE OBJECTIVE FOR THE PHASE 1 EFFORT IS THE EVALUATION OF A FEW RF-EXCITED LAMPS IN TERMS OF THEIR SUITABILITY AS SECONDARY UV/VUV RADIOMETRIC STANDARDS. BY CHARACTERIZING A FEW KEY SOURCE PARAMETERS, ONE CAN DETERMINE WHETHER FURTHER CONSIDERATION OF THESE SOURCES IS WARRANTED.

* information listed above is at the time of submission.

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