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TY - CONF AU - Seidl, P.A. AU - Barnard, J.J. AU - Feinberg, E. AU - Friedman, A. AU - Gilson, E.P. AU - Grote, D.P. AU - Ji, Q. AU - Kaganovich, I. AU - Ludewigt, B.A. AU - Persaud, A. AU - Schenkel, T. AU - Silverman, M. AU - Stepanov, A.D. AU - Sulyman, A.A. AU - Treffert, F. AU - Waldron, W.L. AU - Zimmer, M. ED - Schaa, Volker RW ED - Power, Maria ED - Shiltsev, Vladimir ED - White, Marion TI - Recent Experiments at NDCX-II: Irradiation of Materials Using Short, Intense Ion Beams J2 - Proc. of NAPAC2016, Chicago, IL, USA, October 9-14, 2016 C1 - Chicago, IL, USA T2 - North American Particle Accelerator Conference T3 - 3 LA - english AB - We present an overview of the performance of the Neutralized Drift Compression Experiment-II (NDCX-II) accelerator at Berkeley Lab, and summarize recent studies of material properties created with nanosecond and millimeter-scale ion beam pulses. The scientific topics being explored include the dynamics of ion induced damage in materials, materials synthesis far from equilibrium, warm dense matter and intense beam-plasma physics. We summarize the improved accelerator performance, diagnostics and results of beam-induced irradiation of thin samples of, e.g., tin and silicon. Bunches with over 3x10¹⁰ ions, 1-mm radius, and 2-30 ns FWHM duration have been created. To achieve these short pulse durations and mm-scale focal spot radii, the 1.2 MeV He⁺ ion beam is neutralized in a drift compression section which removes the space charge defocusing effect during final compression and focusing. Quantitative comparison of detailed particle-in-cell simulations with the experiment play an important role in optimizing accelerator performance; these keep pace with the accelerator repetition rate of ~1/minute. PB - JACoW CP - Geneva, Switzerland SP - 755 EP - 757 KW - ion KW - experiment KW - target KW - plasma KW - focusing DA - 2017/01 PY - 2017 SN - 978-3-95450-180-9 DO - 10.18429/JACoW-NAPAC2016-WEPOA29 UR - https://jacow.org/napac2016/papers/wepoa29.pdf ER -