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Information × Registration Number 0221U107254, 0121U110548 , R & D reports Title An influence of the cathode surface morphology on the dark current and high-gradient high-vacuum breakdown of the accelerating structures popup.stage_title Head Lebedynskyi Serhii O., Кандидат фізико-математичних наук Registration Date 30-12-2021 Organization Institute of Applied Physics National Academy of Sciences of Ukraine popup.description2  A double potential barrier model is proposed that considers additional mechanisms of high-gradient breakdowns in gas pedal structures. It is shown that the field emission current from a two-layer metal system with a thickness of the applied nanometer-size coating has an oscillatory resonance character. A quantitative replacement of the triangular potential barrier at the metal-vacuum boundary by a rectangular one with equality of their transparency coefficients is proposed to accelerate numerical calculations. The numerical value of the field emission current density was calculated using the aforementioned barrier. The presence of resonance properties of the field emission current density from a two-layer metal system with a coating thickness of nanometer dimensions was revealed. It was found that under resonance conditions and the value of the constant electric field strength E = 5 GV/m, the field emission current density from the copper surface increases more than 5 times in the case of a nanocluster on the surface or nanocavity in the near-surface metal layer compared to the electronic field emission current on an idealized metal surface. Product Description popup.authors Diachenko Mykhailo M Musienko Igor I Nikishkin Ilya Igorovich Khelemelia Olexii V popup.nrat_date 2022-03-09 Close