Irradiation of materials with short, intense ion pulses at NDCX-II

Seidl, P. A.; Barnard, J. J.; Feinberg, E.; Friedman, A.; Gilson, E. P.; Grote, D. P.; Ji, Q.; Kaganovich, I. D.; Ludewigt, B.; Persaud, A.; Sierra, C.; Silverman, M.; Stepanov, A. D.; Sulyman, A.; Treffert, F.; Waldron, W. L.; Zimmer, M.; Schenkel, T.

doi:10.1017/s0263034617000295

Irradiation of materials with short, intense ion pulses at NDCX-II

Journal Article · Wed May 31 00:00:00 EDT 2017 · Laser and Particle Beams

DOI:https://doi.org/10.1017/s0263034617000295· OSTI ID:1393897

Seidl, P. A. ^[1]; Barnard, J. J. ^[2]; Feinberg, E. ^[1]; Friedman, A. ^[2]; Gilson, E. P. ^[2]; Grote, D. P. ^[2]; Ji, Q. ^[1]; Kaganovich, I. D. ^[3]; Ludewigt, B. ^[1]; Persaud, A. ^[1]; Sierra, C. ^[1]; Silverman, M. ^[1]; Stepanov, A. D. ^[3]; Sulyman, A. ^[1]; Treffert, F. ^[4]; Waldron, W. L. ^[1]; Zimmer, M. ^[4]; Schenkel, T. ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
TU Darmstadt, Darmstadt (Germany)

Here, we present an overview of the performance of the Neutralized Drift Compression Experiment-II (NDCX-II) accelerator at Berkeley Lab, and report on recent target experiments on beam-driven melting and transmission ion energy loss measurements with nanosecond and millimeter-scale ion beam pulses and thin tin foils. Bunches with around 10¹¹ ions, 1 mm radius, and 2–30 ns full width at half maximum duration have been created with corresponding fluences in the range of 0.1–0.7 J/cm². To achieve these short pulse durations and mm-scale focal spot radii, the 1.1 MeV [megaelectronvolt (10⁶ eV)] He⁺ ion beam is neutralized in a drift compression section, which removes the space charge defocusing effect during final compression and focusing. The beam space charge and drift compression techniques resemble necessary beam conditions and manipulations in heavy ion inertial fusion accelerators. In conclusion, quantitative comparison of detailed particle-in-cell simulations with the experiment plays an important role in optimizing accelerator performance

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Contributing Organization:: Work supported by the US DOE under contracts DE-AC0205CH11231 (LBNL), DE-AC52-07NA27344 (LLNL), and DE-AC02-09CH11466 (PPPL). F. Treffert and M. Zimmer thank Professor Markus Roth for stimulating discussions.

Grant/Contract Number:: AC02-05CH11231; AC02-09CH11466; AC52-07NA27344

OSTI ID:: 1393897

Alternate ID(s):: OSTI ID: 1513148
OSTI ID: 1436629

Report Number(s):: LLNL-JRNL--738688; PII: S0263034617000295

Journal Information:: Laser and Particle Beams, Journal Name: Laser and Particle Beams Journal Issue: 02 Vol. 35; ISSN 0263-0346

Publisher:: Cambridge University PressCopyright Statement

Country of Publication:: United States

Language:: English

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