Title :
Coherent terahertz radiation from interaction of electron beam with rippled density plasma
Author :
Dahiya, D. ; Sharma, A. ; Pathak, V.B.
Author_Institution :
Center for Energy Studies, Indian Inst. of Technol., Delhi, India
Abstract :
An alternative free electron laser concept for producing coherent terahertz radiation is investigated. A weakly relativistic electron beam impinged on a rippled underdense plasma, at an angle to the ripple wave vector, interacts with a seed terahertz signal to produce a space charge beam mode. The oscillatory electron velocity due to the beam mode beats with the density ripple to generate a coherent electromagnetic wave in the terahertz frequency range in forward direction. For an electron beam with 5 MW power, one can obtain ~40 kW power at 1 THz frequency.
Keywords :
free electron lasers; plasma density; plasma-beam interactions; relativistic electron beams; terahertz wave generation; coherent electromagnetic wave generation; coherent terahertz radiation; electron beam-plasma interaction; free electron laser; frequency 1 THz; oscillatory electron velocity; power 5 MW; ripple wave vector; rippled density plasma; space charge beam mode; weakly relativistic electron beam; Electromagnetic scattering; Electron beams; Free electron lasers; Frequency; Laser beams; Laser modes; Particle beams; Plasma density; Plasma waves; Space charge;
Conference_Titel :
Plasma Science - Abstracts, 2009. ICOPS 2009. IEEE International Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2617-1
DOI :
10.1109/PLASMA.2009.5227427
