| タイトル | Development of a cryogenic hydrogen maser at the NPL |
| 著者（英） | Mossavati, R. |
| 著者所属（英） | National Physical Lab. |
| 発行日 | 1993-06-01 |
| 言語 | eng |
| 内容記述 | A prototype Cold Hydrogen Maser (CHM) was being developed for the past year. The features of this CHM, which is designed to operate initially at 4.2 K, are the use of low loss alumina, and later sapphire, in the fabrication of the microwave cavity; possible use of superconductors for shielding; use of a cryogenic amplifier; possible coating material; and a reliable RF discharge circuit for the dissociation of hydrogen. A numerical simulation was performed to find the dimensions of the microwave cavity for the TE011 mode and the model was confirmed experimentally. The system will be used to test various wall coatings adsorbed on top of a PTFE buffer underlayer. The CHM is expected to be used as a flywheel frequency standard at the NPL with medium-term stability of one part in 10(exp 14) or better. |
| NASA分類 | LASERS AND MASERS |
| レポートNO | 94N10982 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/543321 |
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