Creation and Characterization of an Atomically Sharp Single/Trimer Atom Ir/W(111) Tip by Thermal Field-Assisted Faceting

Kim, Kwang Il; Hwang, Junhyeok; Pin, Min-Wook; Kwon, Jin-Won; Lee, Ha Rim; Park, In-Yong

doi:10.1017/s1431927621012307

Cited by 1 publication

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This high-performance compact pre-lens RFEA is readily applicable to various applications, especially for analyses of narrow energy distributions of charged particle beams. Examples include a monochromator, evaluations of new electron sources, an X-ray microscope, or a gas-field ion source (GFIS) (Emitter, 2007; Mankos et al, 2016; Ogawa & Takai, 2018; Kim et al, 2021). The compact pre-lens RFEA can be installed directly inside electron beam-based instruments to measure the energy distribution under certain conditions, which can be helpful to find optimized energy distribution values.…”

Section: Introductionmentioning

confidence: 99%

High-Performance Compact Pre-Lens Retarding Field Energy Analyzer for Energy Distribution Measurements of an Electron Gun

Lee

Hwang

Ogawa

et al. 2022

Microscopy and Microanalysis

Self Cite

View full text Add to dashboard Cite

The energy distribution of an electron gun is one of the most important characteristics determining the performance of electron beam-based instruments, such as electron microscopes and electron energy loss spectroscopes. For accurate measurements of the energy distribution, this study presents a novel retarding field energy analyzer (RFEA) with the feature of an additional integrated pre-lens, which enables an adjustment of beam trajectory into the analyzer. The advantages of this analyzer are its compact size and simple electrode configuration. According to trajectory simulation theories, the optimum condition arises when the incident electron beam inside the RFEA is focused on the center of a retarding electrode. Comparing I–V curves depending on whether the pre-lens working or not, it is confirmed that the use of the pre-lens dramatically improves the energy resolution and efficiency of the signal acquisition process. The pre-lens RFEA was applied to characterize a Schottky electron gun under various temperatures and extraction voltages as operational conditions. When the tip temperature was increased by 50 K, we were able to measure an energy distribution broadening of 13.8 meV with the proposed pre-lens RFEA. The relative standard deviation of energy distribution was 0.7% for each working condition.

show abstract

Section: Introductionmentioning

confidence: 99%