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Title: Harmonic cascade FEL designs for LUX, a facility for ultrafast x-ray science

Abstract

LUX is a design study to develop concepts for future ultrafast x-ray facilities. Presently, LUX is based on an electron beam accelerated to {approx}3-GeV energy in a superconducting, recirculating linac. Included in the design are multiple free-electron laser (FEL) beamlines which use the harmonic cascade approach to produce coherent XUV and soft X-ray emission beginning with a strong input seed at {approx}200-nm wavelength obtained from a ''conventional'' laser. Each cascade module generally operates in the low-gain regime and is composed of a radiator together with a modulator section, separated by a magnetic chicane. The chicane temporally delays the electron beam pulse in order that a ''virgin'' pulse region (with undegraded energy spread) be brought into synchronism with the radiation pulse. For a given cascade, the output photon energy can be selected over a wide range by varying the seed laser wavelength and the field strength in the undulators. We present numerical simulation results, as well as those from analytical models, to examine certain aspects of the predicted FEL performance. We also discuss lattice considerations pertinent to harmonic cascade FELs, some sensitivity studies and requirements on the undulator alignment, and temporal pulse evolution initiated by short input radiation seeds.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE. Office of Science (US)
OSTI Identifier:
833569
Report Number(s):
LBNL-55020-Conf.
R&D Project: Z3FALS; TRN: US0406729
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 26th International Free Electron Laser Conference, Trieste (IT), 08/29/2004--09/03/2004; Other Information: PBD: 25 Aug 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ALIGNMENT; DESIGN; ELECTRON BEAMS; FREE ELECTRON LASERS; HARMONICS; LASERS; PHOTONS; RADIATIONS; RADIATORS; SEEDS; SENSITIVITY; SIMULATION; WAVELENGTHS; WIGGLER MAGNETS; FREE-ELECTRON LASER HARMONIC CASCADE LUX

Citation Formats

Corlett, John, Fawley, William, Penn, Gregory, Wan, Weishi, Zholents, A, Reinsch, M, and Wurtele, Jonathan. Harmonic cascade FEL designs for LUX, a facility for ultrafast x-ray science. United States: N. p., 2004. Web.
Corlett, John, Fawley, William, Penn, Gregory, Wan, Weishi, Zholents, A, Reinsch, M, & Wurtele, Jonathan. Harmonic cascade FEL designs for LUX, a facility for ultrafast x-ray science. United States.
Corlett, John, Fawley, William, Penn, Gregory, Wan, Weishi, Zholents, A, Reinsch, M, and Wurtele, Jonathan. 2004. "Harmonic cascade FEL designs for LUX, a facility for ultrafast x-ray science". United States. https://www.osti.gov/servlets/purl/833569.
@article{osti_833569,
title = {Harmonic cascade FEL designs for LUX, a facility for ultrafast x-ray science},
author = {Corlett, John and Fawley, William and Penn, Gregory and Wan, Weishi and Zholents, A and Reinsch, M and Wurtele, Jonathan},
abstractNote = {LUX is a design study to develop concepts for future ultrafast x-ray facilities. Presently, LUX is based on an electron beam accelerated to {approx}3-GeV energy in a superconducting, recirculating linac. Included in the design are multiple free-electron laser (FEL) beamlines which use the harmonic cascade approach to produce coherent XUV and soft X-ray emission beginning with a strong input seed at {approx}200-nm wavelength obtained from a ''conventional'' laser. Each cascade module generally operates in the low-gain regime and is composed of a radiator together with a modulator section, separated by a magnetic chicane. The chicane temporally delays the electron beam pulse in order that a ''virgin'' pulse region (with undegraded energy spread) be brought into synchronism with the radiation pulse. For a given cascade, the output photon energy can be selected over a wide range by varying the seed laser wavelength and the field strength in the undulators. We present numerical simulation results, as well as those from analytical models, to examine certain aspects of the predicted FEL performance. We also discuss lattice considerations pertinent to harmonic cascade FELs, some sensitivity studies and requirements on the undulator alignment, and temporal pulse evolution initiated by short input radiation seeds.},
doi = {},
url = {https://www.osti.gov/biblio/833569}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {8}
}

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