Power Spectrum Calculation for the Cornell Wiggler a Sase Experiment at BNL

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Recently the authors showed [I] that the widely used simulation code TDA3D, even though a single frequency code, can be used to determine the power spectrum in the SASE process with excellent approximation in the exponential growth regime. In this paper, they apply this method to the BNL Cornell Wiggler A SASE experiment as an example. When the gain is not very high, there are many modes in the radiation, which seems to make the analytical calculation very difficult. However, they show that the increment of the radiation due to SASE over the spontaneous radiation can be expanded in terms … continued below

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15 pages

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Yu, L. H. August 16, 1998.

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Recently the authors showed [I] that the widely used simulation code TDA3D, even though a single frequency code, can be used to determine the power spectrum in the SASE process with excellent approximation in the exponential growth regime. In this paper, they apply this method to the BNL Cornell Wiggler A SASE experiment as an example. When the gain is not very high, there are many modes in the radiation, which seems to make the analytical calculation very difficult. However, they show that the increment of the radiation due to SASE over the spontaneous radiation can be expanded in terms of guided modes with rapid convergence. Thus when the spontaneous radiation is subtracted from the SASE power during the calculation, there is a good agreement between the analytical theory and the numerical simulation.

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15 pages

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INIS; OSTI as DE00758973

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  • FREE ELECTRON LASER, WILLIAMSBURG, VA (US), 08/16/1998--08/21/1998

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  • Report No.: BNL--65854
  • Report No.: KC0204011
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 758973
  • Archival Resource Key: ark:/67531/metadc704659

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  • August 16, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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Yu, L. H. Power Spectrum Calculation for the Cornell Wiggler a Sase Experiment at BNL, article, August 16, 1998; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc704659/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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