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Progress in the Design of a High-Gradient, THz-Driven Electron Gun

ORAL

Abstract

High energy particle sources are in demand for a variety of applications. To limit the size and cost of these sources, high accelerating gradient is required. Vacuum breakdown limits the achievable gradient in normal conducting accelerators, but using THz-frequency structures could allow for compact, GV/m-scale devices. This work will present the design of standing-wave electron guns which utilize this principle. The gun cavities are machined from copper and operate in the pi-mode at 110 GHz. In the current design, electrons are field-emitted from a diamond cathode and accelerated to 400 keV in 2 mm. The device will be tested using a pulsed 110 GHz gyrotron in order to characterize the electron beam properties and collect breakdown statistics. Future designs will also be discussed, including a Cu cathode and possibilities for reaching 1 MeV.

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Authors

  • Samantha M. Lewis

    SLAC National Accelerator Laboratory, University of California, Berkeley

  • Antara Bhattacharya

    SLAC National Accelerator Laboratory, Department of Physics, University of Nevada, Reno, 89557, USA, School of Mathematics and Physics, the University of Queensland, Brisbane, QLD 4072, Australia, University of California, Berkeley, National Institute for Materials Science, Lawrence Berkeley National Lab, Chemical Engineering, Stanford University, Santa Clara University, Lawrence Livermore National Laboratory, University of California San Diego, University of Nevada, Reno, Nihon University, Osaka U., LLNL, SLAC, U. of Nevada, Reno, California State University, Chico, Lawrence Livermore National Laboratory; UC, Irvine, Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Physics, California Polytechnic State University, San Luis Obispo, Oak Ridge National Lab, Department of Physics, California Polytechnic State University, San Luis Obispo, CA 93407, USA, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6021, New Zealand, California Polytechnic State University, University of California, Santa Barbara, Department of Physics, California Polytechnic State University, Victoria University of Wellington, Palo Alto High School, Palo Alto, CA, Navy Children School, Mumbai, Maharashtra, India

  • Antara Bhattacharya

    SLAC National Accelerator Laboratory, Department of Physics, University of Nevada, Reno, 89557, USA, School of Mathematics and Physics, the University of Queensland, Brisbane, QLD 4072, Australia, University of California, Berkeley, National Institute for Materials Science, Lawrence Berkeley National Lab, Chemical Engineering, Stanford University, Santa Clara University, Lawrence Livermore National Laboratory, University of California San Diego, University of Nevada, Reno, Nihon University, Osaka U., LLNL, SLAC, U. of Nevada, Reno, California State University, Chico, Lawrence Livermore National Laboratory; UC, Irvine, Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Physics, California Polytechnic State University, San Luis Obispo, Oak Ridge National Lab, Department of Physics, California Polytechnic State University, San Luis Obispo, CA 93407, USA, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6021, New Zealand, California Polytechnic State University, University of California, Santa Barbara, Department of Physics, California Polytechnic State University, Victoria University of Wellington, Palo Alto High School, Palo Alto, CA, Navy Children School, Mumbai, Maharashtra, India

  • Antara Bhattacharya

    SLAC National Accelerator Laboratory, Department of Physics, University of Nevada, Reno, 89557, USA, School of Mathematics and Physics, the University of Queensland, Brisbane, QLD 4072, Australia, University of California, Berkeley, National Institute for Materials Science, Lawrence Berkeley National Lab, Chemical Engineering, Stanford University, Santa Clara University, Lawrence Livermore National Laboratory, University of California San Diego, University of Nevada, Reno, Nihon University, Osaka U., LLNL, SLAC, U. of Nevada, Reno, California State University, Chico, Lawrence Livermore National Laboratory; UC, Irvine, Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Physics, California Polytechnic State University, San Luis Obispo, Oak Ridge National Lab, Department of Physics, California Polytechnic State University, San Luis Obispo, CA 93407, USA, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6021, New Zealand, California Polytechnic State University, University of California, Santa Barbara, Department of Physics, California Polytechnic State University, Victoria University of Wellington, Palo Alto High School, Palo Alto, CA, Navy Children School, Mumbai, Maharashtra, India