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Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium
For the precise measurement of the hyperfine structure of antiprotonic helium microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose front and rear faces are meshed to allow the antiprotons and laser beams to enter. The cavity is embe...
| Autores principales: | , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2004
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.nima.2004.06.144 http://cds.cern.ch/record/815074 |
| _version_ | 1780905368320212992 |
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| author | Barna, D Caspers, Friedhelm Eades, John Gilg, H Hayano, R S Hori, Masaki Horváth, M Hayano, R S Ishikawa, T Juhász, B Sakaguchi, J Suzuki, K Torii, H A Widmann, E Yamaguchi, H Yamazaki, T |
| author_facet | Barna, D Caspers, Friedhelm Eades, John Gilg, H Hayano, R S Hori, Masaki Horváth, M Hayano, R S Ishikawa, T Juhász, B Sakaguchi, J Suzuki, K Torii, H A Widmann, E Yamaguchi, H Yamazaki, T |
| author_sort | Barna, D |
| collection | CERN |
| description | For the precise measurement of the hyperfine structure of antiprotonic helium microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose front and rear faces are meshed to allow the antiprotons and laser beams to enter. The cavity is embedded in a cryogenic helium gas target. Frequency tuning of 300 MHz with Q values of 2700-3000 was achieved using over-coupling and an external triple stub tuner. We also present Monte-Carlo simulations of the stopping distribution of antiprotons in the low-density helium gas using the GEANT4 package with modified energy loss routines. |
| id | cern-815074 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2004 |
| record_format | invenio |
| spelling | cern-8150742019-09-30T06:29:59Zdoi:10.1016/j.nima.2004.06.144http://cds.cern.ch/record/815074engBarna, DCaspers, FriedhelmEades, JohnGilg, HHayano, R SHori, MasakiHorváth, MHayano, R SIshikawa, TJuhász, BSakaguchi, JSuzuki, KTorii, H AWidmann, EYamaguchi, HYamazaki, TCryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic HeliumAccelerators and Storage RingsFor the precise measurement of the hyperfine structure of antiprotonic helium microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose front and rear faces are meshed to allow the antiprotons and laser beams to enter. The cavity is embedded in a cryogenic helium gas target. Frequency tuning of 300 MHz with Q values of 2700-3000 was achieved using over-coupling and an external triple stub tuner. We also present Monte-Carlo simulations of the stopping distribution of antiprotons in the low-density helium gas using the GEANT4 package with modified energy loss routines.CERN-AB-2005-004CERN-PH-EP-2004-071oai:cds.cern.ch:8150742004-05-20 |
| spellingShingle | Accelerators and Storage Rings Barna, D Caspers, Friedhelm Eades, John Gilg, H Hayano, R S Hori, Masaki Horváth, M Hayano, R S Ishikawa, T Juhász, B Sakaguchi, J Suzuki, K Torii, H A Widmann, E Yamaguchi, H Yamazaki, T Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium |
| title | Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium |
| title_full | Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium |
| title_fullStr | Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium |
| title_full_unstemmed | Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium |
| title_short | Cryogenic Tunable Microwave Cavity at 13 GHz for Hyperfine Spectroscopy of Antiprotonic Helium |
| title_sort | cryogenic tunable microwave cavity at 13 ghz for hyperfine spectroscopy of antiprotonic helium |
| topic | Accelerators and Storage Rings |
| url | https://dx.doi.org/10.1016/j.nima.2004.06.144 http://cds.cern.ch/record/815074 |
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