| タイトル | Rare Earth Doped Yttrium Aluminum Garnet (YAG) Selective Emitters |
| 本文（外部サイト） | http://hdl.handle.net/2060/19990047775 |
| 著者（英） | Pal, AnnaMarie T.; Jenkins, Phillip P.; Patton, Martin O.; Chubb, Donald L. |
| 著者所属（英） | NASA Glenn Research Center |
| 発行日 | 1999-05-01 |
| 言語 | eng |
| 内容記述 | As a result of their electron structure, rare earth ions in crystals at high temperature emit radiation in several narrow bands rather than in a continuous blackbody manner. This study presents a spectral emittance model for films and cylinders of rare earth doped yttrium aluminum garnets. Good agreement between experimental and theoretical film spectral emittances was found for erbium and holmium aluminum garnets. Spectral emittances of films are sensitive to temperature differences across the film. For operating conditions of interest, the film emitter experiences a linear temperature variation whereas the cylinder emitter has a more advantageous uniform temperature. Emitter efficiency is also a sensitive function of temperature. For holminum aluminum garnet film the efficiency is 0.35 at 1446K but only 0.27 at 1270 K. |
| NASA分類 | Solid-State Physics |
| レポートNO | NASA/TM-1999-208835
NAS 1.15:208835
E-11446 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/96310 |
