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

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

Research output: Contribution to journalReview articlepeer-review

16 Scopus citations

Abstract

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. Quantitative comparison of detailed particle-in-cell simulations with the experiment plays an important role in optimizing accelerator performance.

Original languageEnglish (US)
Pages (from-to)373-378
Number of pages6
JournalLaser and Particle Beams
Volume35
Issue number2
DOIs
StatePublished - Jun 1 2017

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Fusion energy
  • Induction accelerator
  • Materials
  • Radiation damage
  • Space charge

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