R Li, A Picksley, C Benedetti, F Filippi, J Stackhouse, L Fan-Chiang, H E Tsai, K Nakamura, C B Schroeder, J van Tilborg, E Esarey, C G R Geddes, A J Gonsalves
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引用次数: 0
Abstract
Modern laser plasma accelerators often require plasma waveguides tens of centimeters long to propagate a high-intensity drive laser pulse. Tapering the longitudinal gas density profile in 10 cm scale gas jets could allow for single stage laser plasma acceleration well beyond 10 GeV with current petawatt-class laser systems. Via simulation and interferometry measurements, we show density control by longitudinally adjusting the throat width and jet angle. Density profiles appropriate for tapering were calculated analytically and via particle-in-cell simulations and were matched experimentally. These simulations show that tapering can increase electron beam energy using 19 J laser energy from ∼9 GeV to >12 GeV in a 30 cm plasma and the accelerated charge by an order of magnitude.
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Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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