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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...

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Detalles Bibliográficos
Autores principales: Federmann, S, Caspers, F, Mahner, E, Juhasz, B, Widmann, E
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:http://cds.cern.ch/record/1459620
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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
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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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AT caspersf frequencyfinetuningofaspinflipcavityforantihydrogenatoms
AT mahnere frequencyfinetuningofaspinflipcavityforantihydrogenatoms
AT juhaszb frequencyfinetuningofaspinflipcavityforantihydrogenatoms
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