SLAC has two electron accelerators, the Linac Coherent Light Source (LCLS) and the Facility for Advanced Accelerator Experimental Tests (FACET), providing high-charge, high-peak-current, femtosecond electron bunches. These characteristics are ideal for generating intense broadband terahertz (THz) pulses via coherent transition radiation. For LCLS and FACET respectively, the THz pulse duration is typically 20 and 80 fs RMS and can be tuned via the electron bunch duration; emission spectra span 3–30 THz and 0.5 THz–5 THz; and the energy in a quasi-half-cycle THz pulse is 0.2 and 0.6 mJ. The peak electric field at a THz focus has reached 4.4 GV/m (0.44 V/Å) at LCLS. This paper presents measurements of the terahertz pulses and preliminary observations of nonlinear materials response.
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February 2013
Research Article|
February 22 2013
Intense terahertz pulses from SLAC electron beams using coherent transition radiation
Ziran Wu;
Ziran Wu
1Accelerator Directorate, SLAC National Accelerator Laboratory,
Stanford University
, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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Alan S. Fisher;
Alan S. Fisher
a)
1Accelerator Directorate, SLAC National Accelerator Laboratory,
Stanford University
, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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John Goodfellow;
John Goodfellow
2Department of Materials Science and Engineering,
Stanford University
, Stanford, California 94305, USA
3
Stanford Institute for Materials and Energy Science
, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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Matthias Fuchs;
Matthias Fuchs
3
Stanford Institute for Materials and Energy Science
, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
4
PULSE Institute for Ultrafast Energy Science
, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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Dan Daranciang;
Dan Daranciang
5Department of Chemistry,
Stanford University
, Stanford, California 94305, USA
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Mark Hogan;
Mark Hogan
1Accelerator Directorate, SLAC National Accelerator Laboratory,
Stanford University
, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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Henrik Loos;
Henrik Loos
1Accelerator Directorate, SLAC National Accelerator Laboratory,
Stanford University
, 2575 Sand Hill Road, Menlo Park, California 94025, USA
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Aaron Lindenberg
Aaron Lindenberg
2Department of Materials Science and Engineering,
Stanford University
, Stanford, California 94305, USA
3
Stanford Institute for Materials and Energy Science
, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
4
PULSE Institute for Ultrafast Energy Science
, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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a)
Author to whom correspondence should be addressed. Electronic mail: afisher@slac.stanford.edu.
Rev. Sci. Instrum. 84, 022701 (2013)
Article history
Received:
October 10 2012
Accepted:
December 31 2012
Citation
Ziran Wu, Alan S. Fisher, John Goodfellow, Matthias Fuchs, Dan Daranciang, Mark Hogan, Henrik Loos, Aaron Lindenberg; Intense terahertz pulses from SLAC electron beams using coherent transition radiation. Rev. Sci. Instrum. 1 February 2013; 84 (2): 022701. https://doi.org/10.1063/1.4790427
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