Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode
Electron bunch lengthening due to space-charge forces in state-of-the-art rf photoinjectors limits the minimum bunch length attainable to several hundreds of femtoseconds. Although this can be alleviated by increasing the transverse dimension of the electron bunch, a larger initial radius causes pat...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2006-08-01
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| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.9.084201 |
| _version_ | 1818863611286650880 |
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| author | M. J. de Loos S. B. van der Geer Y. M. Saveliev V. M. Pavlov A. J. W. Reitsma S. M. Wiggins J. Rodier T. Garvey D. A. Jaroszynski |
| author_facet | M. J. de Loos S. B. van der Geer Y. M. Saveliev V. M. Pavlov A. J. W. Reitsma S. M. Wiggins J. Rodier T. Garvey D. A. Jaroszynski |
| author_sort | M. J. de Loos |
| collection | DOAJ |
| description | Electron bunch lengthening due to space-charge forces in state-of-the-art rf photoinjectors limits the minimum bunch length attainable to several hundreds of femtoseconds. Although this can be alleviated by increasing the transverse dimension of the electron bunch, a larger initial radius causes path-length differences in both the rf cavity and in downstream focusing elements. In this paper we show that a curved cathode virtually eliminates these undesired effects. Detailed numerical simulations confirm that significantly shorter bunches are produced by an rf photogun with a curved cathode compared to a flat cathode device. The proposed novel method will be used to provide 100 fs duration electron bunches for injection into a laser-driven plasma wakefield accelerator. |
| first_indexed | 2024-12-19T10:18:31Z |
| format | Article |
| id | doaj.art-b90ee70390d44528916e083cfb5e18cc |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-19T10:18:31Z |
| publishDate | 2006-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-b90ee70390d44528916e083cfb5e18cc2022-12-21T20:26:08ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022006-08-019808420110.1103/PhysRevSTAB.9.084201Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathodeM. J. de LoosS. B. van der GeerY. M. SavelievV. M. PavlovA. J. W. ReitsmaS. M. WigginsJ. RodierT. GarveyD. A. JaroszynskiElectron bunch lengthening due to space-charge forces in state-of-the-art rf photoinjectors limits the minimum bunch length attainable to several hundreds of femtoseconds. Although this can be alleviated by increasing the transverse dimension of the electron bunch, a larger initial radius causes path-length differences in both the rf cavity and in downstream focusing elements. In this paper we show that a curved cathode virtually eliminates these undesired effects. Detailed numerical simulations confirm that significantly shorter bunches are produced by an rf photogun with a curved cathode compared to a flat cathode device. The proposed novel method will be used to provide 100 fs duration electron bunches for injection into a laser-driven plasma wakefield accelerator.http://doi.org/10.1103/PhysRevSTAB.9.084201 |
| spellingShingle | M. J. de Loos S. B. van der Geer Y. M. Saveliev V. M. Pavlov A. J. W. Reitsma S. M. Wiggins J. Rodier T. Garvey D. A. Jaroszynski Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode Physical Review Special Topics. Accelerators and Beams |
| title | Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode |
| title_full | Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode |
| title_fullStr | Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode |
| title_full_unstemmed | Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode |
| title_short | Radial bunch compression: Path-length compensation in an rf photoinjector with a curved cathode |
| title_sort | radial bunch compression path length compensation in an rf photoinjector with a curved cathode |
| url | http://doi.org/10.1103/PhysRevSTAB.9.084201 |
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