Nature Physics · 2009 · 548 citations · 31 references
Natural SciencesMaterials SciencePhysicsOpticsRadiation PhysicsX-ray OpticsBeam HardeningHard X-ray OpticsX-ray Focusing Optics
31
On Gauge Invariance and Vacuum Polarization
Julian Schwinger · Physical Review · 1951 · 7.1K citations
Phase retrieval algorithms: a comparison
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Laser wake field acceleration: the highly non-linear broken-wave regime
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Thomas F. Kelly, Michael K. Miller · Review of Scientific Instruments · 2007 · 857 citations · Full text
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Laser-driven soft-X-ray undulator source
M. Fuchs, R. Weingartner, A. Popp et al. · Nature Physics · 2009 · 378 citations