Compact, low power radio frequency cavity for femtosecond electron microscopy

The Review of Scientific Instruments
A LassiseO J Luiten

Abstract

Reported here is the design, construction, and characterization of a small, power efficient, tunable dielectric filled cavity for the creation of femtosecond electron bunches in an existing electron microscope without the mandatory use of femtosecond lasers. A 3 GHz pillbox cavity operating in the TM(110) mode was specially designed for chopping the beam of a 30 keV scanning electron microscope. The dielectric material used is ZrTiO(4), chosen for the high relative permittivity (ε(r) = 37 at 10 GHz) and low loss tangent (tan δ = 2 × 10(-4)). This allows the cavity radius to be reduced by a factor of six, while the power consumption is reduced by an order of magnitude compared to a vacuum pillbox cavity. These features make this cavity ideal as a module for existing electron microscopes, and an alternative to femtosecond laser systems integrated with electron microscopes.

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Citations

Jan 22, 2013·Annual Review of Physical Chemistry·Anton BartyHenry N Chapman
Jul 28, 2016·Science·A Ryabov, P Baum
Oct 6, 2016·Structural Dynamics·W VerhoevenO J Luiten
Sep 2, 2019·The Review of Scientific Instruments·W VerhoevenO J Luiten
Apr 12, 2017·Structural Dynamics·J G H FranssenO J Luiten
Nov 9, 2019·Physical Review Letters·Takumi SannomiyaYukinori Nagatani
Oct 9, 2019·Structural Dynamics·Lixin ZhangPieter Kruit
Oct 15, 2021·Physical Chemistry Chemical Physics : PCCP·Wyatt A Curtis, David J Flannigan

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Methods Mentioned

BETA
electron
electron crystallography
electron microscopy

Software Mentioned

CST
GPT
GENERAL PARTICLE TRACER ( GPT )
CST Microwave Studio

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