THz radiation as a bunch diagnostic forlaser-wakefield-accelerated electron bunches

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Experimental results are reported from two measurementtechniques (semiconductor switching and electro-optic sampling) thatallow temporal characterization of electron bunches produced by alaser-driven plasma-based accelerator. As femtosecond electron bunchesexit the plasma-vacuum interface, coherent transition radiation (at THzfrequencies) is emitted. Measuring the properties of this radiationallows characterization of the electron bunches. Theoretical work on theemission mechanism is represented, including a model that calculates theTHz waveform from a given bunch profile. It is found that the spectrum ofthe 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 ... continued below

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van Tilborg, J.; Schroeder, C.B.; Filip, C.V.; Toth, Cs.; Geddes,C.G.R.; Fubiani, G. et al. February 15, 2006.

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Experimental results are reported from two measurementtechniques (semiconductor switching and electro-optic sampling) thatallow temporal characterization of electron bunches produced by alaser-driven plasma-based accelerator. As femtosecond electron bunchesexit the plasma-vacuum interface, coherent transition radiation (at THzfrequencies) is emitted. Measuring the properties of this radiationallows characterization of the electron bunches. Theoretical work on theemission mechanism is represented, including a model that calculates theTHz waveform from a given bunch profile. It is found that the spectrum ofthe 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 measurementsdemonstrate both the shot-to-shot stability of bunch parameters that arecritical to THz emission (such as total charge and bunch length), as wellas femtosecond synchrotron between bunch, THz pulse, and laserbeam.

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  • Journal Name: Physics of Plasmas 13 (5); Journal Volume: 13; Journal Issue: 5; Related Information: Journal Publication Date: May 2006

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  • Report No.: LBNL--60017
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1063/1.2187957 | External Link
  • Office of Scientific & Technical Information Report Number: 923273
  • Archival Resource Key: ark:/67531/metadc900873

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

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  • February 15, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 31, 2016, 4:06 p.m.

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van Tilborg, J.; Schroeder, C.B.; Filip, C.V.; Toth, Cs.; Geddes,C.G.R.; Fubiani, G. et al. THz radiation as a bunch diagnostic forlaser-wakefield-accelerated electron bunches, article, February 15, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc900873/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.