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

Abstract

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 2more » 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.« less

Authors:
; ; ; ; ; ; ; ; ; ; ;  [1]; ; ;  [2]; ;  [3]; ; ;  [4]
  1. Stanford Linear Accelerator Center, Menlo Park, CA (United States)
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Physics
  3. Lawrence Livermore National Lab., CA (United States)
  4. Lawrence Berkeley Lab., CA (United States)
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10114933
Report Number(s):
SLAC-PUB-6312; LBL-33456; CONF-930722-56
ON: DE94005235; TRN: AHC29402%%80
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Annual meeting of the Society of Photo-Optical Instrumentation Engineers (SPIE),San Diego, CA (United States),11-16 Jul 1993; Other Information: PBD: Aug 1993
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 42 ENGINEERING; LINEAR ACCELERATORS; X-RAY LASERS; DESIGN; LIGHT SOURCES; FREE ELECTRON LASERS; ACCELERATOR FACILITIES; PERMANENT MAGNETS; BEAM DYNAMICS; 430100; 426002; DESIGN, DEVELOPMENT, AND OPERATION; LASERS AND MASERS

Citation Formats

Seeman, J T, Bane, K, Boyce, R, Loew, G, Morton, P, Nuhn, H D, Paterson, J, Pianetta, P, Raubenheimer, T, Tatchyn, R, Vylet, V, Winick, H, Pellegrini, C, Rosenzweig, J, Travish, G, Prosnitz, D, Scharlemann, E T, Halbach, K, Kim, K J, and Xie, M. Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac. United States: N. p., 1993. Web.
Seeman, J T, Bane, K, Boyce, R, Loew, G, Morton, P, Nuhn, H D, Paterson, J, Pianetta, P, Raubenheimer, T, Tatchyn, R, Vylet, V, Winick, H, Pellegrini, C, Rosenzweig, J, Travish, G, Prosnitz, D, Scharlemann, E T, Halbach, K, Kim, K J, & Xie, M. Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac. United States.
Seeman, J T, Bane, K, Boyce, R, Loew, G, Morton, P, Nuhn, H D, Paterson, J, Pianetta, P, Raubenheimer, T, Tatchyn, R, Vylet, V, Winick, H, Pellegrini, C, Rosenzweig, J, Travish, G, Prosnitz, D, Scharlemann, E T, Halbach, K, Kim, K J, and Xie, M. Sun . "Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac". United States. https://www.osti.gov/servlets/purl/10114933.
@article{osti_10114933,
title = {Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac},
author = {Seeman, J T and Bane, K and Boyce, R and Loew, G and Morton, P and Nuhn, H D and Paterson, J and Pianetta, P and Raubenheimer, T and Tatchyn, R and Vylet, V and Winick, H and Pellegrini, C and Rosenzweig, J and Travish, G and Prosnitz, D and Scharlemann, E T and Halbach, K and Kim, K J and Xie, M},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/10114933}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {8}
}

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