Search Results - "Fleming, Ryan L."

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    Stoichiometry control and automated growth of alkali antimonide photocathode films by molecular beam deposition by Pavlenko, Vitaly, Smedley, John, Scheinker, Alexander, Fleming, Ryan L., Alexander, Anna, Hoffbauer, Mark A., Moody, Nathan A.

    Published in Applied physics letters (28-02-2022)
    “…We report on a method of photoemissive film growth that controls stoichiometry in real time. We show that stoichiometry control using a feedback loop is…”
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    Journal Article
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    Physics of Electron Emission and Beam Dynamics from a Single Diamond Field Emitter by Huang, Chengkun, Kwan, Thomas J. T., Piryatinski, Andrei, Baker, Ryan C., Kim, Dongsung, Pavlenko, Vitaly, Andrews, Heather L., Fleming, Ryan L., Simakov, Evgenya I.

    “…Many applications such as compact accelerators and electron microscopy demand high brightness electron beams with small beam size and ultra-low emittance…”
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    Conference Proceeding
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    Study of the Beam Divergence in Diamond Field Emitter Array Cathodes by Kim, Dongsung, Andrews, Heather L., Fleming, Ryan L., Lewellen, John L., Nichols, Kimberley, Pavlenko, Vitaly, Shchegolkov, Dmitry Yu, Simakov, Evgenya I.

    “…We present the results of beam divergence studies for the diamond field emitter array (DFEA) cathodes producing high-current-density electron beams. At Los…”
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    Conference Proceeding
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    A Simple Variable Focus Lens for Field-Emitter Cathodes by Fleming, Ryan L., Andrews, Heather L., Bishofberger, Kip A., Kim, Dongsung, Lewellen, John L., Nichols, Kimberley, Shchegolkov, Dmitry Yu, Simakov, Evgenya I.

    “…We present the design and initial test results for a simple, variable-focus solenoidal lens with integrated emittance filtering. The design was developed as a…”
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    Conference Proceeding
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    Field Assisted Photoemission from Nanocrystalline Diamond and Diamond Field Emitter Arrays by Pavlenko, Vitaly, Andrews, Heather L., Aragonez, Robert J., Fleming, Ryan L., Huang, Chengkun, Kim, Dongsung, Kwan, Thomas J. T., Piryatinski, Andrei, Simakov, Evgenya I.

    “…Field emission from nanocrystalline diamond and especially from diamond field emitters is known to have an onset at low electric fields of a few MV/m, although…”
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    Conference Proceeding