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

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 10 11 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/cm 2. To achieve these short pulse durations and mm-scale focal spot radii, the 1.1 MeV [megaelectronvolt (10 6 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
 [1] ;  [2] ;  [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [3] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [1] ;  [4] ;  [1] ;  [4] ;  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. TU Darmstadt, Darmstadt (Germany)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344; AC02-09CH11466
Accepted Manuscript
Journal Name:
Laser and Particle Beams
Additional Journal Information:
Journal Volume: 35; Journal Issue: 02; Journal ID: ISSN 0263-0346
Cambridge University Press
Research Org:
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)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Contributing Orgs:
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.
Country of Publication:
United States
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Fusion energy; Induction accelerator; Materials; Radiation damage; Space; charge
OSTI Identifier: