Speaker
Alex Friedman
(LBNL)
Description
A. Friedman, J. J. Barnard, R. H. Cohen, M. Dorf, D. P. Grote, S. M. Lund, W. M. Sharp
LLNL, Livermore CA 94550 USA
A. Faltens, E. Henestroza, J. W. Kwan, E. P. Lee, B. G. Logan, P. K. Roy, P. A. Seidl, J.-L. Vay , W. L. Waldron
LBNL, Berkeley CA 94720 USA
R. C. Davidson, E. P. Gilson, I. D. Kaganovich, E. A. Startsev
PPPL, Princeton NJ 08543 USA
(Heavy Ion Fusion Science Virtual National Laboratory Collaboration)
The Neutralized Drift Compression Experiment-II (NDCX-II) will produce ion beams for studies of Warm Dense Matter, target physics, and intense-beam dynamics relevant to heavy-ion-driven Inertial Fusion Energy. NDCX-II will accelerate a 20-50 nC Li pulse to 1.2-3 MeV, compress it to sub-ns duration in a neutralizing plasma, and focus it onto a target. We present: the NDCX-II machine layout and “physics design” [A. Friedman, et al., Phys. Plasmas 17, 056704 (2010)], including the use of high-occupancy pulsed-solenoid focusing and modified induction cells from LLNL’s Advanced Test Accelerator; unusual aspects of the beam dynamics (such as the use of the beam’s space charge to remove the applied head-to-tail energy tilt and halt the initial non-neutral compression in the accelerator); the simulation studies that enabled the design; estimates of robustness; prospects for using dipoles to correct for residual misalignments of the magnetic axis (and thereby suppress detrimental “corkscrew” oscillations of the beam centroid); plans for commissioning over the coming months; and some possible experiments using the machine itself and extensions.
Work performed under auspices of U.S. DoE by LLNL, LBNL, & PPPL under Contracts DE-AC52-07NA27344, DE-AC02-05CH1123, & DEFG0295ER40919.
Primary author
Alex Friedman
(LBNL)
