Fowler-Nordheim Emission in a Time-Varying Field and its Application for a THz Radiation Source

Miron Voin, Levi Schachter

Research output: Contribution to conferencePaperpeer-review

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 languageEnglish
StatePublished - 2018
EventThe 64th Annual Meeting of the Israeli Physical Society - Jerusalem, Israel
Duration: 9 Dec 20189 Dec 2018
Conference number: 64th
https://www.israelphysicalsociety.org/ips-conference-2018/ips-conference-2018-homepage

Conference

ConferenceThe 64th Annual Meeting of the Israeli Physical Society
Abbreviated titleIPS2018
Country/TerritoryIsrael
CityJerusalem
Period9/12/189/12/18
Internet address

Fingerprint

Dive into the research topics of 'Fowler-Nordheim Emission in a Time-Varying Field and its Application for a THz Radiation Source'. Together they form a unique fingerprint.

Cite this