High average current electron guns for high-power free electron lasers
High average power free-electron lasers (FELs) require high average current electron injectors capable of generating high quality, short duration electron bunches with a repetition rate equal to the frequency of the rf linac. In this paper we propose, analyze, and simulate an rf-gated, gridded therm...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2011-02-01
|
| Series: | Physical Review Special Topics. Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevSTAB.14.020702 |
| _version_ | 1819175080544960512 |
|---|---|
| author | Phillip Sprangle Joseph Peñano Bahman Hafizi Daniel Gordon Steven Gold Antonio Ting Chad Mitchell |
| author_facet | Phillip Sprangle Joseph Peñano Bahman Hafizi Daniel Gordon Steven Gold Antonio Ting Chad Mitchell |
| author_sort | Phillip Sprangle |
| collection | DOAJ |
| description | High average power free-electron lasers (FELs) require high average current electron injectors capable of generating high quality, short duration electron bunches with a repetition rate equal to the frequency of the rf linac. In this paper we propose, analyze, and simulate an rf-gated, gridded thermionic electron gun for use in high average power FELs. Thermionic cathodes can provide the necessary high current, have long lifetimes, and require modest vacuums. In the proposed configuration the rf-gated grid is modulated at the fundamental and 3rd harmonic of the linac frequency. The addition of the 3rd harmonic on the grid results in shorter electron bunches. In this configuration, every rf bucket of the linac accelerating field contains an electron bunch. Particle-in-cell simulations indicate that this approach can provide the necessary charge per bunch, bunch duration, longitudinal and transverse emittance, and repetition rate for high average power FELs operating in the IR regime. |
| first_indexed | 2024-12-22T20:49:11Z |
| format | Article |
| id | doaj.art-56bfe00ce222463dae93e449df0780aa |
| institution | Directory Open Access Journal |
| issn | 1098-4402 |
| language | English |
| last_indexed | 2024-12-22T20:49:11Z |
| publishDate | 2011-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Special Topics. Accelerators and Beams |
| spelling | doaj.art-56bfe00ce222463dae93e449df0780aa2022-12-21T18:13:08ZengAmerican Physical SocietyPhysical Review Special Topics. Accelerators and Beams1098-44022011-02-0114202070210.1103/PhysRevSTAB.14.020702High average current electron guns for high-power free electron lasersPhillip SprangleJoseph PeñanoBahman HafiziDaniel GordonSteven GoldAntonio TingChad MitchellHigh average power free-electron lasers (FELs) require high average current electron injectors capable of generating high quality, short duration electron bunches with a repetition rate equal to the frequency of the rf linac. In this paper we propose, analyze, and simulate an rf-gated, gridded thermionic electron gun for use in high average power FELs. Thermionic cathodes can provide the necessary high current, have long lifetimes, and require modest vacuums. In the proposed configuration the rf-gated grid is modulated at the fundamental and 3rd harmonic of the linac frequency. The addition of the 3rd harmonic on the grid results in shorter electron bunches. In this configuration, every rf bucket of the linac accelerating field contains an electron bunch. Particle-in-cell simulations indicate that this approach can provide the necessary charge per bunch, bunch duration, longitudinal and transverse emittance, and repetition rate for high average power FELs operating in the IR regime.http://doi.org/10.1103/PhysRevSTAB.14.020702 |
| spellingShingle | Phillip Sprangle Joseph Peñano Bahman Hafizi Daniel Gordon Steven Gold Antonio Ting Chad Mitchell High average current electron guns for high-power free electron lasers Physical Review Special Topics. Accelerators and Beams |
| title | High average current electron guns for high-power free electron lasers |
| title_full | High average current electron guns for high-power free electron lasers |
| title_fullStr | High average current electron guns for high-power free electron lasers |
| title_full_unstemmed | High average current electron guns for high-power free electron lasers |
| title_short | High average current electron guns for high-power free electron lasers |
| title_sort | high average current electron guns for high power free electron lasers |
| url | http://doi.org/10.1103/PhysRevSTAB.14.020702 |
| work_keys_str_mv | AT phillipsprangle highaveragecurrentelectrongunsforhighpowerfreeelectronlasers AT josephpenano highaveragecurrentelectrongunsforhighpowerfreeelectronlasers AT bahmanhafizi highaveragecurrentelectrongunsforhighpowerfreeelectronlasers AT danielgordon highaveragecurrentelectrongunsforhighpowerfreeelectronlasers AT stevengold highaveragecurrentelectrongunsforhighpowerfreeelectronlasers AT antonioting highaveragecurrentelectrongunsforhighpowerfreeelectronlasers AT chadmitchell highaveragecurrentelectrongunsforhighpowerfreeelectronlasers |