Tailored terahertz pulses from a laser-modulated electronbeam

Conference · Tue Jul 19 04:00:00 EDT 2005

OSTI ID:860237

Martin, Michael C; Byrd, John; Hao, Zhao; Robin, David; Sannibale, Fernando; Schoenlein, Robert W; Zholents, Alexander; Zolotorev, Max

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: Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director. Office of Science. Office of Basic EnergySciences
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 860237
• Report Number(s): LBNL--58991; BnR: KC0204016
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
Terahertz synchrotron slicing coherent synchrotronradiation