High-gain harmonic generation of soft X-rays with the `fresh bunch` technique

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We report numerical simulations (using the TDA code) and analytic verification of the generation of 64 {Angstrom} high power soft X- rays from an exponential regime single pass seeded FEL. The seed is generated in the FEL using the High Gain Harmonic Generation (HGHG) technique combined with the `Fresh bunch` technique. A seed pulse at 2944 {Angstrom} is generated by conventional laser techniques. The seed pulse produces an intense energy modulation of the rear part of a I GeV, 1245 {Angstrom} electron beam in a `modulator` wiggler. In the `radiator` wiggler, (resonant to 64 {Angstrom}), the energy modulation creates beam ... continued below

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16 p.

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Yu, Li-Hua & Ben-Zvi, I. October 1996.

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Description

We report numerical simulations (using the TDA code) and analytic verification of the generation of 64 {Angstrom} high power soft X- rays from an exponential regime single pass seeded FEL. The seed is generated in the FEL using the High Gain Harmonic Generation (HGHG) technique combined with the `Fresh bunch` technique. A seed pulse at 2944 {Angstrom} is generated by conventional laser techniques. The seed pulse produces an intense energy modulation of the rear part of a I GeV, 1245 {Angstrom} electron beam in a `modulator` wiggler. In the `radiator` wiggler, (resonant to 64 {Angstrom}), the energy modulation creates beam density modulation followed by radiation of the 46{sup th} harmonic of the seed. We use a magnetic delay to position the 64 A{Angstrom} radiation at the undisturbed front of the bunch to serve as a seed for a single pass, exponential growth FEL. After a 9 m long exponential section followed by a 7 m long tapered section the radiation power reaches 3.3 GW.

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16 p.

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OSTI as DE97001524

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  • 18. international free electron laser conference and 3. FEL Users` workshop, Rome (Italy), 25-30 Aug 1996

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  • Other: DE97001524
  • Report No.: BNL--63639
  • Report No.: CONF-9608133--12
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 434974
  • Archival Resource Key: ark:/67531/metadc682222

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Office of Scientific & Technical Information Technical Reports

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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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  • October 1996

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  • July 25, 2015, 2:20 a.m.

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  • Nov. 9, 2015, 12:31 p.m.

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Yu, Li-Hua & Ben-Zvi, I. High-gain harmonic generation of soft X-rays with the `fresh bunch` technique, article, October 1996; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc682222/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.