A 2-D imaging heat-flux gauge

Technical Report · Mon Jul 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5286249· OSTI ID:5286249

Noel, B W; Borella, H M ^[1]; Beshears, D L; Sartory, W K; Tobin, K W; Williams, R K ^[2]; Turley, W D ^[3]

---

1. Los Alamos National Lab., NM (United States)
2. Oak Ridge National Lab., TN (United States)
3. EG and G Energy Measurements, Inc., Goleta, CA (United States). Santa Barbara Operations

This report describes a new leadless two-dimensional imaging optical heat-flux gauge. The gauge is made by depositing arrays of thermorgraphic-phosphor (TP) spots onto the faces of a polymethylpentene is insulator. In the first section of the report, we describe several gauge configurations and their prototype realizations. A satisfactory configuration is an array of right triangles on each face that overlay to form squares when the gauge is viewed normal to the surface. The next section of the report treats the thermal conductivity of TPs. We set up an experiment using a comparative longitudinal heat-flow apparatus to measure the previously unknown thermal conductivity of these materials. The thermal conductivity of one TP, Y{sub 2}O{sub 3}:Eu, is 0.0137 W/cm{center dot}K over the temperature range from about 300 to 360 K. The theories underlying the time response of TP gauges and the imaging characteristics are discussed in the next section. Then we discuss several laboratory experiments to (1) demonstrate that the TP heat-flux gauge can be used in imaging applications; (2) obtain a quantum yield that enumerates what typical optical output signal amplitudes can be obtained from TP heat-flux gauges; and (3) determine whether LANL-designed intensified video cameras have sufficient sensitivity to acquire images from the heat-flux gauges. We obtained positive results from all the measurements. Throughout the text, we note limitations, areas where improvements are needed, and where further research is necessary. 12 refs., 25 figs., 4 tabs.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOD; Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5286249
• Report Number(s): LA-12129-MS; ON: DE92000153
• Country of Publication: United States
• Language: English

Related Subjects

47 OTHER INSTRUMENTATION
36 MATERIALS SCIENCE
HEAT FLUX
MEASURING METHODS
MEASURING INSTRUMENTS
DESIGN
THERMAL CONDUCTIVITY
CAMERAS
COMPUTER PROGRAM DOCUMENTATION
EUROPIUM
GADOLINIUM OXIDES
IMAGES
LAYERS
LUMINESCENCE
OPTICAL SYSTEMS
PHOSPHORS
SENSITIVITY
SULFUR OXIDES
TERBIUM
THIN FILMS
TURBINES
YTTRIUM OXIDES
CHALCOGENIDES
ELEMENTS
FILMS
GADOLINIUM COMPOUNDS
MACHINERY
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RARE EARTHS
SULFUR COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TURBOMACHINERY
YTTRIUM COMPOUNDS
440500* - Thermal Instrumentation- (1990-)
360603 - Materials- Properties