Transport and spatial energy deposition of relativistic electrons in copper-doped fast ignition plasmas

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Jarrott, L. C.
McGuffey, C.
Beg, F. N.
Solodov, A. A.
Theobald, W.
Qiao, B.
Stoeckl, C.
Betti, R.
Chen, H.
Delettrez, J. A.

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2017

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Fast electron transport and spatial energy deposition are investigated in integrated cone-guided Fast Ignition experiments by measuring fast electron induced copper K-shell emission using a copper tracer added to deuterated plastic shells with a geometrically reentrant gold cone. Experiments were carried out at the Laboratory for Laser Energetics on the OMEGA/OMEGA-EP Laser where the plastic shells were imploded using 54 of the 60 OMEGA60 beams (3 omega, 20 kJ), while the high intensity OMEGA-EP (BL2) beam (1 omega, 10 ps, 500 J, I-peak > 10(19) W/cm(2)) was focused onto the inner cone tip. A retrograde analysis using the hybrid-PIC electron transport code, ZUMA, is performed to examine the sensitivity of the copper K-alpha spatial profile on the laser-produced fast electrons, facilitating the optimization of new target point designs and laser configurations to improve the compressed core areal density by a factor of 4 and the fast electron energy coupling by a factor of 3.5. Published by AIP Publishing.

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Jarrott, L. C., McGuffey, C., Beg, F. N., Solodov, A. A., Theobald, W., Qiao, B., … Wei, M. S. (2017). Transport and spatial energy deposition of relativistic electrons in copper-doped fast ignition plasmas. Physics of Plasmas, 24(10), 102710. doi:10.1063/1.4999108

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This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Jarrott, L. C., et al. "Transport and spatial energy deposition of relativistic electrons in copper-doped fast ignition plasmas." Physics of Plasmas 24.10 (2017): 102710. and may be found at https://doi.org/10.1063/1.4999108.

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1070-664X

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