Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4874981
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Funding
- NSF CAREER Grant [1054164]
- DARPA [N66001-11-1-4208]
- NSF/DNDO [F021166]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1054164] Funding Source: National Science Foundation
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High intensity, short pulse lasers can be used to accelerate electrons to ultra-relativistic energies via laser wakefield acceleration (LWFA) [T. Tajima and J. M. Dawson, Phys. Rev. Lett. 43, 267 (1979)]. Recently, it was shown that separating the injection and acceleration processes into two distinct stages could prove beneficial in obtaining stable, high energy electron beams [Gonsalves et al., Nat. Phys. 7, 862 (2011); Liu et al., Phys. Rev. Lett. 107, 035001 (2011); Pollock et al., Phys. Rev. Lett. 107, 045001 (2011)]. Here, we use a stereolithography based 3D printer to produce two-stage gas targets for LWFA experiments on the HERCULES laser system at the University of Michigan. We demonstrate substantial improvements to the divergence, pointing stability, and energy spread of a laser wakefield accelerated electron beam compared with a single-stage gas cell or gas jet target. (C) 2014 AIP Publishing LLC.
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