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THz radiation as a bunch diagnostic forlaser-wakefield-accelerated electron bunches [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2006.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators:
United States. Department of Energy and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Experimental results are reported from two measurement techniques (semiconductor switching and electro-optic sampling) that allow temporal characterization of electron bunches produced by a laser-driven plasma-based accelerator. As femtosecond electron bunches exit the plasma-vacuum interface, coherent transition radiation (at THzfrequencies) is emitted. Measuring the properties of this radiation allows characterization of the electron bunches. Theoretical work on the emission mechanism is represented, including a model that calculates theTHz waveform from a given bunch profile. It is found that the spectrum of the THz pulse is coherent up to the 200 mu m thick crystal (ZnTe) detection limit of 4 THz, which corresponds to the production of sub-50fs (root-mean-square) electron bunch structure. The measurements demonstrate both the shot-to-shot stability of bunch parameters that are critical to THz emission (such as total charge and bunch length), as well as femtosecond synchrotron between bunch, THz pulse, and laser beam.
Report Numbers:
E 1.99:lbnl--60017
lbnl--60017
Other Subject(s):
Note:
Published through SciTech Connect.
02/15/2006.
"lbnl--60017"
": KA1501020"
Physics of Plasmas 13 (5) 13 5 ISSN 1070-664X; PHPAEN FT
Schroeder, C.B.; Geddes,C.G.R.; Esarey, E.; Leemans, W.P.; Filip, C.V.; Fubiani, G.; van Tilborg, J.; Toth, Cs.
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Funding Information:
DE-AC02-05CH11231
455401
View MARC record | catkey: 14683157