High power terahertz radiation source based on electron beam wakefields.
Rev Sci Instrum
; 84(2): 022706, 2013 Feb.
Article
em En
| MEDLINE
| ID: mdl-23464188
ABSTRACT
A table top device for producing high peak power (tens of megawatts to a gigawatt) T-ray beams is described. An electron beam with a rectangular longitudinal profile is produced out of a photoinjector via stacking of the laser pulses. The beam is also run off-crest of the photoinjector rf to develop an energy chirp. After passing through a dielectric loaded waveguide, the beam's energy becomes modulated by its self-wake. In a chicane beamline following the dielectric energy-bunching section this energy modulation is converted to a density modulation-a bunch train. The density modulated beam can be sent through a power extraction section, like a dielectric loaded accelerating structure, or simply can intercept a foil target, producing THz radiation of various bandwidths and power levels.
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MEDLINE
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En
Ano de publicação:
2013
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Article