Calculation of coherent emissions and gain from a prebunched Free Electron Laser

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Description

This report advances a theoretical model for the single pass growth of coherent radiation in a prebunched FEL system. The FEL system includes a radio frequency linear accelerator (fr linac) as the injector, a resonator cavity with a wiggler magnet, and two highly reflective plano-concave mirrors, typically 99{percent} of the radiation is reflected inside the resonator. The model is based upon the following assumptions: a) the electron beam is cold, b) a super- electron is a particle with {approximately} 10{sup 8} elementary charges inside a bunch; the bunch length is much smaller than the radiation wavelength and the super-electron scatters ... continued below

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25 p.

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Treadwell, E.A. August 1, 1995.

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  • Treadwell, E.A. Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center

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Description

This report advances a theoretical model for the single pass growth of coherent radiation in a prebunched FEL system. The FEL system includes a radio frequency linear accelerator (fr linac) as the injector, a resonator cavity with a wiggler magnet, and two highly reflective plano-concave mirrors, typically 99{percent} of the radiation is reflected inside the resonator. The model is based upon the following assumptions: a) the electron beam is cold, b) a super- electron is a particle with {approximately} 10{sup 8} elementary charges inside a bunch; the bunch length is much smaller than the radiation wavelength and the super-electron scatters with the rf wave in a single pass through the resonator, c) a smooth phase space transition must exist between the rf linac and the resonator, d) the energy gain is low per pass and consequently in the linear gain regime, and e) if condition (b) is satisfied and the bunch is resonant with the FEL beat wave, all electrons lose energy to the wave, in the lowest order approximation. A simple scaling technique is used to calculate the output power given the number of particles in a bunch and the efficiency for retrieving coherent radiation from the resonator. 4 refs., 8 figs., 2 tabs.

Physical Description

25 p.

Notes

OSTI as DE96011010

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  • Other Information: PBD: Aug 1995

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  • Other: DE96011010
  • Report No.: PFC/RR--95-10
  • Grant Number: AC02-78ET51013
  • DOI: 10.2172/236218 | External Link
  • Office of Scientific & Technical Information Report Number: 236218
  • Archival Resource Key: ark:/67531/metadc664449

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 4:08 p.m.

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Treadwell, E.A. Calculation of coherent emissions and gain from a prebunched Free Electron Laser, report, August 1, 1995; United States. (digital.library.unt.edu/ark:/67531/metadc664449/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.