System and method for the direct calorimetric measurement of laser absorptivity of materials
Abstract
A method and system for calorimetrically measuring the temperature-dependent absorptivity of a homogeneous material dimensioned to be thin and flat with a predetermined uniform thickness and a predetermined porosity. The system includes a material holder adapted to support and thermally isolate the material to be measured, an irradiation source adapted to uniformly irradiate the material with a beam of electromagnetic radiation, and an irradiation source controller adapted to control the irradiation source to uniformly heat the material during a heating period, followed by a cooling period when the material is not irradiated. A thermal sensor measures temperature of the material during the heating and cooling periods, and a computing system first calculates temperature-dependent convective and radiative thermal losses of the material based on the measured temperature of the material during the cooling period when beam intensity is zero, followed by calculation of the temperature-dependent absorptivity of the material based on the temperature-dependent convective and radiative thermal losses determined from the cooling period.
- Inventors:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1568081
- Patent Number(s):
- 10234411
- Application Number:
- 15/213,210
- Assignee:
- Lawrence Livermore National Security, LLC (Livermore, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01K - MEASURING TEMPERATURE
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- AC52-07NA27344
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 07/18/2016
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Rubenchik, Alexander, Golosker, Ilya V., LeBlanc, Mary M., Mitchell, Scott C., and Wu, Sheldon S. System and method for the direct calorimetric measurement of laser absorptivity of materials. United States: N. p., 2019.
Web.
Rubenchik, Alexander, Golosker, Ilya V., LeBlanc, Mary M., Mitchell, Scott C., & Wu, Sheldon S. System and method for the direct calorimetric measurement of laser absorptivity of materials. United States.
Rubenchik, Alexander, Golosker, Ilya V., LeBlanc, Mary M., Mitchell, Scott C., and Wu, Sheldon S. Tue .
"System and method for the direct calorimetric measurement of laser absorptivity of materials". United States. https://www.osti.gov/servlets/purl/1568081.
@article{osti_1568081,
title = {System and method for the direct calorimetric measurement of laser absorptivity of materials},
author = {Rubenchik, Alexander and Golosker, Ilya V. and LeBlanc, Mary M. and Mitchell, Scott C. and Wu, Sheldon S.},
abstractNote = {A method and system for calorimetrically measuring the temperature-dependent absorptivity of a homogeneous material dimensioned to be thin and flat with a predetermined uniform thickness and a predetermined porosity. The system includes a material holder adapted to support and thermally isolate the material to be measured, an irradiation source adapted to uniformly irradiate the material with a beam of electromagnetic radiation, and an irradiation source controller adapted to control the irradiation source to uniformly heat the material during a heating period, followed by a cooling period when the material is not irradiated. A thermal sensor measures temperature of the material during the heating and cooling periods, and a computing system first calculates temperature-dependent convective and radiative thermal losses of the material based on the measured temperature of the material during the cooling period when beam intensity is zero, followed by calculation of the temperature-dependent absorptivity of the material based on the temperature-dependent convective and radiative thermal losses determined from the cooling period.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 19 00:00:00 EDT 2019},
month = {Tue Mar 19 00:00:00 EDT 2019}
}
Works referenced in this record:
Determination of Thermal Properties of Materials
patent, January 1965
- Parker, William J.; Butler, Clay P.; Abbott, Gaynor L.
- US Patent Document 3165915
Differential Radiometer Having High and Low Absorption Characteristics
patent, October 1967
- Clifford, Richard P.
- US Patent Document 3348047
High frequency response multilayer heat flux gauge configuration
patent, February 1988
- Epstein, Alan H.; Guenette, Gerald R.; Norton, Jr., Robert James
- US Patent Document 4,722,609
Method for calibrating a heat flux gauge
patent, March 1989
- Epstein, Alan H.; Guenette, Gerald R.; Norton, Jr., Robert James
- US Patent Document 4,812,050