Tailored terahertz pulses from a laser-modulated electronbeam
Interaction of an electron beam with a femtosecond laserpulseco-propagating through a wiggler modulates the electronenergieswithin a short slice of the electron bunch comparable with the durationof the laser pulse (Figure 1). Propagating around an electron storagering, this bunch develops a longitudinal density perturbation due to thedispersion of electron trajectories. Figure 1 shows how this createsfemtosecond electron bunch wings which are used for femtosecond x-raylight. In addition, this density perturbation emits temporally andspatially coherent tera-hertz pulses whichare inherently synchronized tothe modulating laser. This gives us a new way to study coherentsynchrotron radaition, and creates an opportunity for tuning the THzemmission specifically for the needs of a given experiment.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. Office of Basic EnergySciences
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 860237
- Report Number(s):
- LBNL-58991; R&D Project: 458121; BnR: KC0204016
- Resource Relation:
- Conference: IRMMW-THz 2005: The Joint 30th InternationalConference on Infrared and Millimeter Waves and 13th InternationalConference on Terahertz Electronics, Williamsburg, Virginia USA,September 19-23, 2005
- Country of Publication:
- United States
- Language:
- English
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