Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac

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The authors describe the possible use of the SLAC linac to drive a unique, powerful, short wavelength Linac Coherent Light Source (LCLS). Using the FEL principle, lasing is achieved in a single pass of a high peak current electron beam through a long undulator by self-amplified-spontaneous-emission (SASE). The main components are a high-brightness electron RF gun with a photocathode, two electron bunch length compressors, the existing SLAC linac, beam diagnostics, and a long undulator combined with a FODO quadrupole focusing system. The RF gun, to be installed about 1 km from the end of the SLAC linac, would produce a … continued below

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10 p.

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Seeman, J. T.; Bane, K.; Boyce, R.; Loew, G.; Morton, P.; Nuhn, H. D. et al. August 1, 1993.

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Description

The authors describe the possible use of the SLAC linac to drive a unique, powerful, short wavelength Linac Coherent Light Source (LCLS). Using the FEL principle, lasing is achieved in a single pass of a high peak current electron beam through a long undulator by self-amplified-spontaneous-emission (SASE). The main components are a high-brightness electron RF gun with a photocathode, two electron bunch length compressors, the existing SLAC linac, beam diagnostics, and a long undulator combined with a FODO quadrupole focusing system. The RF gun, to be installed about 1 km from the end of the SLAC linac, would produce a single bunch of 6 x 10{sup 9} electrons with an invariant emittance of about 3 mm-mrad and a bunch length of about 500 {mu}m. That bunch is then accelerated to 100 MeV and compressed to a length of about 200 {mu}m. The main SLAC linac accelerates the bunch to 2 GeV were a second bunch compressor reduces the length to 30--40 {mu}m and produces a peak current of 2--3 kA. The bunch is then accelerated to 7--8 GeV and transported to a 50--70 m long undulator. Using electrons below 8 GeV, the undulator could operate at wavelengths down to 2 nm, producing about 10 GW peak power in sub-ps light pulses. At a linac repetition rate of 120 Hz, the average power is about 1 W. Linac operation at lower beam energies provides longer wavelength radiation. After the undulator, the beam is deposited in a dump. The LCLS light pulses are then distributed to multiple user stations using grazing incident mirrors. Length compression, emittance control, phase stability, FEL design criteria, and parameter tolerances are discussed. A demonstration experiment is also described which uses the SLAC linac and (possibly) the PALADIN undulator to study SASE to power saturation at wavelengths of 40--360 nm.

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10 p.

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INIS; OSTI as DE94005235; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Annual meeting of the Society of Photo-Optical Instrumentation Engineers (SPIE),San Diego, CA (United States),11-16 Jul 1993

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  • Other: DE94005235
  • Report No.: SLAC-PUB--6312
  • Report No.: LBL--33456
  • Report No.: CONF-930722--56
  • Grant Number: AC03-76SF00515
  • Office of Scientific & Technical Information Report Number: 10114933
  • Archival Resource Key: ark:/67531/metadc1279671

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

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  • August 1, 1993

Added to The UNT Digital Library

  • Oct. 12, 2018, 6:44 a.m.

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  • Nov. 19, 2018, 1:54 p.m.

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Seeman, J. T.; Bane, K.; Boyce, R.; Loew, G.; Morton, P.; Nuhn, H. D. et al. Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac, article, August 1, 1993; Menlo Park, California. (https://digital.library.unt.edu/ark:/67531/metadc1279671/: accessed March 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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