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Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms
As part of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) physics program a spin-flip cavity, for measurements of the ground-state hyperfine transition frequency of antihydrogen atoms, is needed. The purpose of the cavity is to excite antihydrogen atoms depending on their po...
Autores principales: | , , , , |
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Lenguaje: | eng |
Publicado: |
2012
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Materias: | |
Acceso en línea: | http://cds.cern.ch/record/1459620 |
_version_ | 1780925198275444736 |
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author | Federmann, S Caspers, F Mahner, E Juhasz, B Widmann, E |
author_facet | Federmann, S Caspers, F Mahner, E Juhasz, B Widmann, E |
author_sort | Federmann, S |
collection | CERN |
description | As part of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) physics program a spin-flip cavity, for measurements of the ground-state hyperfine transition frequency of antihydrogen atoms, is needed. The purpose of the cavity is to excite antihydrogen atoms depending on their polarisation by a microwave field operating at 1.42 GHz. The delicacy of designing such a cavity lies in achieving and maintaining the required properties of this field over a large aperture of 10 cm and for a long period of time (required amplitude stability is 1% over 12 h). This paper presents the frequency fine tuning techniques developed to obtain the desired centre frequency of 1.42GHz with a Q value below 500 as well as the circuit used for the frequency sweep over a bandwidth of 6MHz. |
id | cern-1459620 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2012 |
record_format | invenio |
spelling | cern-14596202022-08-17T13:25:41Zhttp://cds.cern.ch/record/1459620engFedermann, SCaspers, FMahner, EJuhasz, BWidmann, EFrequency Fine-tuning of a Spin-flip Cavity for Antihydrogen AtomsAccelerators and Storage RingsAs part of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) physics program a spin-flip cavity, for measurements of the ground-state hyperfine transition frequency of antihydrogen atoms, is needed. The purpose of the cavity is to excite antihydrogen atoms depending on their polarisation by a microwave field operating at 1.42 GHz. The delicacy of designing such a cavity lies in achieving and maintaining the required properties of this field over a large aperture of 10 cm and for a long period of time (required amplitude stability is 1% over 12 h). This paper presents the frequency fine tuning techniques developed to obtain the desired centre frequency of 1.42GHz with a Q value below 500 as well as the circuit used for the frequency sweep over a bandwidth of 6MHz.CERN-ATS-2012-123oai:cds.cern.ch:14596202012-05-20 |
spellingShingle | Accelerators and Storage Rings Federmann, S Caspers, F Mahner, E Juhasz, B Widmann, E Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms |
title | Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms |
title_full | Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms |
title_fullStr | Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms |
title_full_unstemmed | Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms |
title_short | Frequency Fine-tuning of a Spin-flip Cavity for Antihydrogen Atoms |
title_sort | frequency fine-tuning of a spin-flip cavity for antihydrogen atoms |
topic | Accelerators and Storage Rings |
url | http://cds.cern.ch/record/1459620 |
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