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18 April 2024 |
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Recent Experiments At Ndcx-II: Irradiation Of Materials Using Short, Intense Ion Beams | P. A. Seidl
; Q. Ji
; A. Persaud
; E. Feinberg
; B. Ludewigt
; M. Silverman
; A. Sulyman
; W. L. Waldron
; T. Schenkel
; J. J. Barnard
; A. Friedman
; D. P. Grote
; E. P. Gilson
; I. D. Kaganovich
; A. Stepanov
; F. Treffert
; M. Zimmer
; | Date: |
17 Oct 2016 | Abstract: | 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
3x10^10 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. | Source: | arXiv, 1610.5253 | Services: | Forum | Review | PDF | Favorites |
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