Journal article
Simultaneous measurement of temperature and emissivity of lunar regolith simulant using dual-channel millimeter-wave radiometry
Review of scientific instruments, Vol.82(5), pp.054703-054703-10
05/2011
Handle:
https://hdl.handle.net/2376/108484
PMID: 21639528
Abstract
Millimeter wave (MMW) radiometry can be used for simultaneous measurement of emissivity and temperature of materials under extreme environments (high temperature, pressure, and corrosive environments). The state-of-the-art dual channel MMW passive radiometer with active interferometric capabilities at 137 GHz described here allows for radiometric measurements of sample temperature and emissivity up to at least 1600 °C with simultaneous measurement of sample surface dynamics. These capabilities have been used to demonstrate dynamic measurement of melting of powders of simulated lunar regolith and static measurement of emissivity of solid samples. The paper presents the theoretical background and basis for the dual-receiver system, describes the hardware in detail, and demonstrates the data analysis. Post-experiment analysis of emissivity versus temperature allows further extraction from the radiometric data of millimeter wave viewing beam coupling factors, which provide corroboratory evidence to the interferometric data of the process dynamics observed. These results show the promise of the MMW system for extracting quantitative and qualitative process parameters for industrial processes and access to real-time dynamics of materials behavior in extreme environments.
Metrics
9 Record Views
Details
- Title
- Simultaneous measurement of temperature and emissivity of lunar regolith simulant using dual-channel millimeter-wave radiometry
- Creators
- J S McCloy - Pacific Northwest National Laboratory, Richland, Washington 99352, USAS K SundaramJ MatyasP P Woskov
- Publication Details
- Review of scientific instruments, Vol.82(5), pp.054703-054703-10
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- United States
- Identifiers
- 99900547593001842
- Language
- English
- Resource Type
- Journal article