Operation of an Optical Klystron with Small Dispersion

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The IR Upgrade design at Jefferson Lab uses an optical klystron in order to enhance the flexibility of the free-electron laser system and to match the efficiency to the energy recovery lattice. Most optical klystrons operate with a strong dispersion section [1]. The IR upgrade design requires operation with a dispersion of only a few periods in order to allow the full range of efficiency of the FEL to be explored. This paper will study the details of an optical klystron in this small dispersion limit. The peak gain vs. dispersion section strength has an oscillatory behavior, suggesting that the ... continued below

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272 Kilobytes pages

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Benson, Stephen V. September 1, 2002.

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The IR Upgrade design at Jefferson Lab uses an optical klystron in order to enhance the flexibility of the free-electron laser system and to match the efficiency to the energy recovery lattice. Most optical klystrons operate with a strong dispersion section [1]. The IR upgrade design requires operation with a dispersion of only a few periods in order to allow the full range of efficiency of the FEL to be explored. This paper will study the details of an optical klystron in this small dispersion limit. The peak gain vs. dispersion section strength has an oscillatory behavior, suggesting that the dispersion section strength should be adjusted in unit steps rather than continuously. The gain vs. the effective number of periods is calculated and found to be, on average, in good agreement with theory. Finally, some comments on the relative merits of using an optical klystron or a uniform wiggler in a high power FEL will be presented.

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272 Kilobytes pages

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  • FEL 2002, Argonne National Lab., Argonne, IL (US), 09/08/2002--09/13/2002

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  • Report No.: JLAB-ACC-02-11
  • Report No.: DOE/ER/40150-2159
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 801206
  • Archival Resource Key: ark:/67531/metadc742751

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • September 1, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 5, 2016, 8:24 p.m.

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Benson, Stephen V. Operation of an Optical Klystron with Small Dispersion, article, September 1, 2002; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc742751/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.