Abstract
We consider the possibility of taking advantage of nonlinear character of the Fowler-Nordheim emission law for generation of a bunched electron beam in a resonant cavity. Interaction of electron bunches, accelerated by an electrostatic field in the cavity, with the cavities eigenmodes allows for energy transfer from the e-beam to the electromagnetic field, facilitating generation of radiation. In particular, we are targeting coherent electromagnetic wave generation in the THz range. A simplified model, in absence of space charge effect, shows that in a deep saturation regime a superposition of dc and harmonic electric field in the cavity wold produce field-emitted current density which within an excellent approximation can be represented by a Gaussian profile. For high current densities, space charge effect cannot be ignored and an accurate estimation of the current density spatial/temporal distribution requires a self-consistent solution of a nonlinear electromagnetic problem. We present the latest progress of this research.
Original language | English |
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State | Published - 2018 |
Event | The 64th Annual Meeting of the Israeli Physical Society - Jerusalem, Israel Duration: 9 Dec 2018 → 9 Dec 2018 Conference number: 64th https://www.israelphysicalsociety.org/ips-conference-2018/ips-conference-2018-homepage |
Conference
Conference | The 64th Annual Meeting of the Israeli Physical Society |
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Abbreviated title | IPS2018 |
Country/Territory | Israel |
City | Jerusalem |
Period | 9/12/18 → 9/12/18 |
Internet address |