Author: Lidia, S.M.
Paper Title Page
MOEPPB005 Initial Commissioning of NDCX-II 85
  • S.M. Lidia, D. Arbelaez, W.G. Greenway, J.-Y. Jung, J.W. Kwan, T.M. Lipton, A. Pekedis, P.K. Roy, P.A. Seidl, J.H. Takakuwa, W.L. Waldron
    LBNL, Berkeley, California, USA
  • A. Friedman, D.P. Grote, W. M. Sharp
    LLNL, Livermore, California, USA
  • E.P. Gilson
    PPPL, Princeton, New Jersey, USA
  Funding: This work was performed under the auspices of the U.S Department of Energy by LLNL under contract DE AC52 07NA27344, and by LBNL under contract. DE-AC02-05CH11231.
The Neutralized Drift Compression Experiment-II (NDCX-II) will generate ion beam pulses for studies of Warm Dense Matter and heavy-ion-driven Inertial Fusion Energy. The machine will accelerate 20-50 nC of Li+ to 1.2-3 MeV energy, starting from a 10.9-cm alumino-silicate ion source. At the end of the accelerator the ions are focused to a sub-mm spot size onto a thin foil (planar) target. The pulse duration is compressed from ~500 ns at the source to sub-ns at the target following beam transport in a neutralizing plasma. We first describe the injector, accelerator, transport, final focus and diagnostic facilities. We then report on the results of early commissioning studies that characterize beam quality and beam transport, acceleration waveform shaping and beam current evolution. We present WARP simulation results to benchmark against the experimental measurements.
TUPPD046 Characterization of Li+ Alumino-Silicate Ion Source for Target Heating Experiments 1506
  • P.K. Roy, W.G. Greenway, J.W. Kwan, S.M. Lidia, P.A. Seidl, W.L. Waldron
    LBNL, Berkeley, California, USA
  • D.P. Grote
    LLNL, Livermore, California, USA
  Funding: *This work was performed under the auspices of the U.S Department of Energy by LLNL under contract DE AC52 07NA27344, and by LBNL under contract. DE-AC02-05CH11231.
The Heavy Ion Fusion Sciences (HIFS) program at Lawrence Berkeley National Laboratory will carry out warm dense matter experiments using Li+ ion beam with energy 1.2–3 MeV to achieve uniform heating up to 0.1–1 eV. Experiments will be done using the Neutralized Drift Compression Experiment-II (NDCX-II) facility. The NDCX-II accelerator has been designed to use a large diameter (10.9 cm) Li+ doped alumino-silicate source to produce short pulses of ≈93 mA beam current. Fabrication of a lithium source is complex, it is necessary to apply a higher temperature (>1200-degC) for thermionic emission, and the beam current density of this source is ~1mA/cm2 in the space-charge limited regime. Li+ emission is lower than the other alkaline ions sources (K+, Cs+). The lifetime of this source is roughly 50 hours, when pulsed. Characterization of an operational lithium alumino-silicate ion source, including beam emittance, is presented.
WEPPC031 Completed Assembly of the Daresbury International ERL Cryomodule and its Implementation on ALICE 2272
  • P.A. McIntosh, M.A. Cordwell, P.A. Corlett, P. Davies, E. Frangleton, P. Goudket, K.J. Middleman, S.M. Pattalwar, A.E. Wheelhouse
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • S.A. Belomestnykh
    BNL, Upton, Long Island, New York, USA
  • A. Büchner, F.G. Gabriel, P. Michel
    HZDR, Dresden, Germany
  • J.N. Corlett, D. Li, S.M. Lidia
    LBNL, Berkeley, California, USA
  • G.H. Hoffstaetter, M. Liepe, H. Padamsee, P. Quigley, J. Sears, V.D. Shemelin, V. Veshcherevich
    CLASSE, Ithaca, New York, USA
  • T.J. Jones, J. Strachan
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
  • R.E. Laxdal
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  • D. Proch, J.K. Sekutowicz
    DESY, Hamburg, Germany
  • T.I. Smith
    Stanford University, Stanford, California, USA
  The completion of an optimised SRF cryomodule for application on ERL accelerators has now culminated with the successful assembly of an integrated cryomodule, following an intensive 5 years of development evolution. The cryomodule, which incorporates 2 x 7-cell 1.3 GHz accelerating structures, 3 separate layers of magnetic shielding, fully adjustable & high power input couplers and fast piezo tuners, has been installed on the ALICE ERL facility at Daresbury Laboratory. It is intended that this will permit operational optimisation for maximised efficiency demonstration, through increased Qext adjustment whilst retaining both effective energy recovery and IR-FEL lasing. The collaborative design processes employed in completing this new cryomodule development are explained, along with the assembly and implementation procedures used to facilitate its successful installation on the ALICE ERL facility.  
Accelerator Systems for Heavy-ion Inertial Fusion  
  • S.M. Lidia, B.G. Logan
    LBNL, Berkeley, California, USA
  Funding: This work was performed under the auspices of the U.S. Department of Energy under Contract Numbers DE-AC02-05CH1123, DE-AC52-07NA27344 , and DE-AC02-76CH03073.
Ever since the beginning of inertial fusion research in the 1970's, when proposals to use lasers to implode mm-scale capsules containing deuterium-tritium fusion fuel for energy were first published, the world's accelerator community has been convinced that large heavy-ion particle accelerators, either induction or RF, linear or rings, could also be designed to deliver megajoules of ions in times of order 1 -10 nanoseconds to drive inertial fusion targets at the several Hz pulse rates, brightnesses, efficiencies, and durabilities required for energy. Funding for such intended accelerator development, however, has been held in abeyance pending the outcome of laser fusion ignition tests in the US National Ignition Facility. Target designs set the requirements for heavy ion accelerator designs. The status of NIF's ignition campaign, and implications for several combinations of accelerator and target design options for heavy ion inertial fusion, will be discussed.
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