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

Published online by Cambridge University Press:  31 May 2017

P.A. Seidl ,
J.J. Barnard ,
E. Feinberg ,
A. Friedman ,
E.P. Gilson ,
D.P. Grote ,
Q. Ji ,
I.D. Kaganovich ,
B. Ludewigt  and
A. Persaud
...Show all authors
P.A. Seidl*
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
J.J. Barnard
Affiliation:
Lawrence Livermore National Laboratory, Livermore, USA
E. Feinberg
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
A. Friedman
Affiliation:
Lawrence Livermore National Laboratory, Livermore, USA
E.P. Gilson
Affiliation:
Princeton Plasma Physics Laboratory, Princeton, USA
D.P. Grote
Affiliation:
Lawrence Livermore National Laboratory, Livermore, USA
Q. Ji
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
I.D. Kaganovich
Affiliation:
Princeton Plasma Physics Laboratory, Princeton, USA
B. Ludewigt
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
A. Persaud
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
C. Sierra
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
M. Silverman
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
A.D. Stepanov
Affiliation:
Princeton Plasma Physics Laboratory, Princeton, USA
A. Sulyman
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
F. Treffert
Affiliation:
TU Darmstadt, Darmstadt, Germany
W.L. Waldron
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
M. Zimmer
Affiliation:
TU Darmstadt, Darmstadt, Germany
T. Schenkel
Affiliation:
Lawrence Berkeley National Laboratory, Berkeley, USA
*
Address correspondence and reprint requests to: P.A. Seidl, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Mailstop 58-0111, Berkeley, CA 94720, USA. E-mail: PASeidl@lbl.gov
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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.

Keywords

Fusion energyInduction acceleratorMaterialsRadiation damageSpace charge
Type
Research Article
Information
Laser and Particle Beams , Volume 35 , Issue 2 , June 2017 , pp. 373 - 378
Copyright
Copyright © Cambridge University Press 2017 

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Footnotes

†

Present address: XTD-IDA, Los Alamos National Laboratory, Los Alamos, NM, USA.

References

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