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Stable generation of GeV-class electron beams from self-guided laser-plasma channels
Hafz, Nasr A. M.,Jeong, Tae Moon,Choi, Il Woo,Lee, Seong Ku,Pae, Ki Hong,Kulagin, Victor V.,Sung, Jae Hee,Yu, Tae Jun,Hong, Kyung-Han,Hosokai, Tomonao,Cary, John R.,Ko, Do-Kyeong,Lee, Jongmin Springer Science and Business Media LLC 2008 Nature photonics Vol.2 No.9
Laser Acceleration of Electron Beams to the GeV-class Energies in Gas Jets
Nasr A. M. Hafz,Tae Moon Jeong,Seong Ku Lee,최일우,Ki Hong Pae,Victor V. Kulagin,Jae Hee Sung,Tae Jun Yu,John R. Cary,고도경,Jongmin Lee 한국광학회 2009 Current Optics and Photonics Vol.13 No.1
In a laser-plasma wakefield accelerator, the ponderomotive force of an ultrashort high intensity laser pulse excites a longitudinal wave or plasma bubble in a way similar to the excitation of a wake wave behind a boat as it propagates on the water surface. Electric fields inside the plasma bubble can be several orders of magnitude higher than those available in conventional RF-based particle accelerator facilities which are limited by material breakdown. Therefore, if an electron bunch is properly phase-locked with the bubble’s acceleration field, it can gain relativistic energies within an extremely short distance. Here, in the bubble regime we show the generation of stable and reproducible sub GeV, and GeV-class electron beams. Supported by three-dimensional particle-in-cell simulations, our experimental results show the highest acceleration gradients produced so far. Simulations suggested that the plasma bubble elongation should be minimized in order to achieve higher electron beam energies.