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Virtual gap dielectric wall accelerator

United States Patent

November 5, 2013
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A virtual, moving accelerating gap is formed along an insulating tube in a dielectric wall accelerator (DWA) by locally controlling the conductivity of the tube. Localized voltage concentration is thus achieved by sequential activation of a variable resistive tube or stalk down the axis of an inductive voltage adder, producing a "virtual" traveling wave along the tube. The tube conductivity can be controlled at a desired location, which can be moved at a desired rate, by light illumination, or by photoconductive switches, or by other means. As a result, an impressed voltage along the tube appears predominantly over a local region, the virtual gap. By making the length of the tube large in comparison to the virtual gap length, the effective gain of the accelerator can be made very large.
Caporaso; George James (Livermore, CA), Chen; Yu-Jiuan (Fremont, CA), Nelson; Scott (Patterson, CA), Sullivan; Jim (Livermore, CA), Hawkins; Steven A. (Livermore, CA)
Lawrence Livermore National Security, LLC (Livermore, CA)
12/ 761,607
April 16, 2010
GOVERNMENT RIGHTS The United States Government has rights in this invention pursuant to Contract No. DE-AC52-07NA27344 between the United States Department of Energy and Lawrence Livermore National Security, LLC.