A W Molvik

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  • A W Molvik, D Baca, F M Bieniosek, R H Cohen, A Friedman, M A Furman +6 others
  • 2003
Accelerators for heavy-ion inertial fusion energy (HIF) have an economic incentive to fit beam tubes tightly to beams, putting them at risk from electron clouds produced by emission of electrons and gas from walls. Theory and PIC simulations suggest that the electrons will be radially trapped in the ≥1 kV ion-beam potential. We are beginning studies on the(More)
  • R H Cohen, A Friedman, M A Furman, S M Lund, A W Molvik, P Stoltz +1 other
  • 2003
Stray electrons can be introduced in positive-charge accelerators for heavy ion fusion (or other applications) as a result of ionization of ambient gas or gas released from walls due to halo-ion impact, or as a result of secondary-electron emission. Electron accumulation is impacted by the ion beam potential, accelerating fields, multipole magnetic fields(More)
The achieved performance of the gas dynamic trap version of magnetic mirrors and today's technology we believe are sufficient with modest further efforts for a neutron source for material testing (Q=P fusion /P input ~0.1).. The performance needed for commercial power production requires considerable further advances to achieve the necessary high Q>>10. An(More)
  • A W Molvik, R H Cohen, A Friedman, M Kireeff Covo, S M Lund, Lawrence Livermore +4 others
  • 2004
We use the High Current Experiment (HCX) to study three mitigation measures: a rough surface to reduce electron emission and gas desorption from ions striking walls near grazing incidence, a suppressor electrode after the magnets to block beam-induced electrons off the end structures from drifting upstream, and clearing electrodes to remove electrons from(More)
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