Traveling wave resonant ring for electron cloud studies
Within the framework of the CERN program on electron cloud effects in accelerators, a coaxial multipacting test stand was built. In order to simulate bunched beam, the test stand is subjected to short rf pulses. The field strength in a traveling wave mode is sufficient to trigger multipacting in “as...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2004-07-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.7.073501 |
| _version_ | 1831746209194180608 |
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| author | U. Iriso F. Caspers J-M. Laurent A. Mostacci |
| author_facet | U. Iriso F. Caspers J-M. Laurent A. Mostacci |
| author_sort | U. Iriso |
| collection | DOAJ |
| description | Within the framework of the CERN program on electron cloud effects in accelerators, a coaxial multipacting test stand was built. In order to simulate bunched beam, the test stand is subjected to short rf pulses. The field strength in a traveling wave mode is sufficient to trigger multipacting in “as received” surfaces, but not in chambers treated to reduce the secondary emission yield. Thus a number of upgrades in the bench setup have been pursued, mainly in two directions. The first one is a general reduction in mismatching (i.e., electrical losses) amongst the different parts of the setup. Secondly, instead of dumping the pulsed power into a load, it is recirculated by means of a broadband working regime resonant ring. This ring required the design of a directional coupler with up to 1 kV dc isolation, very low transmission losses, and a four octave bandwidth. This paper reports on the steps required to build this traveling wave resonant ring (improvements on the chamber and implementation of the coupler) and includes an appendix on the main properties of the setup that relate to electron multipacting studies. |
| first_indexed | 2024-12-21T21:10:04Z |
| format | Article |
| id | doaj.art-f6a7962ccf8e47de95c32462058a1f11 |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-21T21:10:04Z |
| publishDate | 2004-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-f6a7962ccf8e47de95c32462058a1f112022-12-21T18:50:10ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022004-07-017707350110.1103/PhysRevSTAB.7.073501Traveling wave resonant ring for electron cloud studiesU. IrisoF. CaspersJ-M. LaurentA. MostacciWithin the framework of the CERN program on electron cloud effects in accelerators, a coaxial multipacting test stand was built. In order to simulate bunched beam, the test stand is subjected to short rf pulses. The field strength in a traveling wave mode is sufficient to trigger multipacting in “as received” surfaces, but not in chambers treated to reduce the secondary emission yield. Thus a number of upgrades in the bench setup have been pursued, mainly in two directions. The first one is a general reduction in mismatching (i.e., electrical losses) amongst the different parts of the setup. Secondly, instead of dumping the pulsed power into a load, it is recirculated by means of a broadband working regime resonant ring. This ring required the design of a directional coupler with up to 1 kV dc isolation, very low transmission losses, and a four octave bandwidth. This paper reports on the steps required to build this traveling wave resonant ring (improvements on the chamber and implementation of the coupler) and includes an appendix on the main properties of the setup that relate to electron multipacting studies.http://doi.org/10.1103/PhysRevSTAB.7.073501 |
| spellingShingle | U. Iriso F. Caspers J-M. Laurent A. Mostacci Traveling wave resonant ring for electron cloud studies Physical Review Special Topics. Accelerators and Beams |
| title | Traveling wave resonant ring for electron cloud studies |
| title_full | Traveling wave resonant ring for electron cloud studies |
| title_fullStr | Traveling wave resonant ring for electron cloud studies |
| title_full_unstemmed | Traveling wave resonant ring for electron cloud studies |
| title_short | Traveling wave resonant ring for electron cloud studies |
| title_sort | traveling wave resonant ring for electron cloud studies |
| url | http://doi.org/10.1103/PhysRevSTAB.7.073501 |
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