Abstract
A smart radiation device (SRD) that is a variable emittance radiator has been developed as a thermal control material for spacecraft. The SRD has the unique feature of large variation of the total hemispherical emittance εH near room temperature. The εH of the SRD changes depending on its temperature. However, there is a drawback of a large solar absorptance αS. It is too large to use as a thermal control material for spacecraft. In order to reduce the large α S, spectral selective multilayer film was developed. This multilayer film reflects solar radiation and transmits far-infrared radiation to maintain the variation in the εH of the SRD. This paper presents thermal radiative properties of the SRD with spectral selective multilayer film. The multilayer film was designed by using a genetic algorithm (GA). The designed multilayer film was evaporated on the surface of the SRD by the electron beam evaporation method. The experimental results of αS and εH of the SRD with the multilayer film agreed well with calculated results.
| Original language | English |
|---|---|
| Pages (from-to) | 757-769 |
| Number of pages | 13 |
| Journal | International Journal of Thermophysics |
| Volume | 24 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2003 May |
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Keywords
- Genetic algorithm
- LaSrMnO
- Manganese oxide
- Multilayer films
- Optical constants
- Solar absorptance
- Spectral reflectance
- Total hemispherical emittance
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Mechanics of Materials
- Computational Mechanics
- Fluid Flow and Transfer Processes
- Physics and Astronomy (miscellaneous)
Cite this
Development of Spectral Selective Multilayer Film for a Variable Emittance Device and Its Radiation Properties Measurements. / Shimazaki, K.; Ohnishi, A.; Nagasaka, Yuji.
In: International Journal of Thermophysics, Vol. 24, No. 3, 05.2003, p. 757-769.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development of Spectral Selective Multilayer Film for a Variable Emittance Device and Its Radiation Properties Measurements
AU - Shimazaki, K.
AU - Ohnishi, A.
AU - Nagasaka, Yuji
PY - 2003/5
Y1 - 2003/5
N2 - A smart radiation device (SRD) that is a variable emittance radiator has been developed as a thermal control material for spacecraft. The SRD has the unique feature of large variation of the total hemispherical emittance εH near room temperature. The εH of the SRD changes depending on its temperature. However, there is a drawback of a large solar absorptance αS. It is too large to use as a thermal control material for spacecraft. In order to reduce the large α S, spectral selective multilayer film was developed. This multilayer film reflects solar radiation and transmits far-infrared radiation to maintain the variation in the εH of the SRD. This paper presents thermal radiative properties of the SRD with spectral selective multilayer film. The multilayer film was designed by using a genetic algorithm (GA). The designed multilayer film was evaporated on the surface of the SRD by the electron beam evaporation method. The experimental results of αS and εH of the SRD with the multilayer film agreed well with calculated results.
AB - A smart radiation device (SRD) that is a variable emittance radiator has been developed as a thermal control material for spacecraft. The SRD has the unique feature of large variation of the total hemispherical emittance εH near room temperature. The εH of the SRD changes depending on its temperature. However, there is a drawback of a large solar absorptance αS. It is too large to use as a thermal control material for spacecraft. In order to reduce the large α S, spectral selective multilayer film was developed. This multilayer film reflects solar radiation and transmits far-infrared radiation to maintain the variation in the εH of the SRD. This paper presents thermal radiative properties of the SRD with spectral selective multilayer film. The multilayer film was designed by using a genetic algorithm (GA). The designed multilayer film was evaporated on the surface of the SRD by the electron beam evaporation method. The experimental results of αS and εH of the SRD with the multilayer film agreed well with calculated results.
KW - Genetic algorithm
KW - LaSrMnO
KW - Manganese oxide
KW - Multilayer films
KW - Optical constants
KW - Solar absorptance
KW - Spectral reflectance
KW - Total hemispherical emittance
UR - http://www.scopus.com/inward/record.url?scp=0141806128&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0141806128&partnerID=8YFLogxK
U2 - 10.1023/A:1024044417708
DO - 10.1023/A:1024044417708
M3 - Article
AN - SCOPUS:0141806128
VL - 24
SP - 757
EP - 769
JO - International Journal of Thermophysics
JF - International Journal of Thermophysics
SN - 0195-928X
IS - 3
ER -