Colliding pulse injection experiments in non-collinear geometryfor controlled laser plasma wakefield acceleration of electrons
An optical injection scheme for a laser-plasma basedaccelerator which employs a non-collinear counter-propagating laser beamto push background electrons in the focusing and acceleration phase viaponderomotive beat with the trailing part of the wakefield driver pulseis discussed. Preliminary experiments were performed using a drive beamof a_0 = 2.6 and colliding beam of a_1 = 0.8 both focused on the middleof a 200 mu m slit jet backed with 20 bar, which provided ~; 260 mu mlong gas plume. The enhancement in the total charge by the collidingpulse was observed with sharp dependence on the delay time of thecolliding beam. Enhancement of the neutron yield was also measured, whichsuggests a generation of electrons above 10 MeV.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director. Office of Science. High EnergyPhysics
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 929389
- Report Number(s):
- LBNL-63271; R&D Project: 455401; BnR: KA1501020; TRN: US0803608
- Resource Relation:
- Conference: 2008 Particle Accelerator Conference,Albuquerque, NM, June 25 - 29, 2007
- Country of Publication:
- United States
- Language:
- English
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