Eric Montgomery

Advancing Ultrafast Electron Microscopy with RF-Driven and Frequency Tunable Pulser

Ryan A. Gnabasik, Eric Montgomery, Chunguang Jing, Alexei D. Kanareykin

Ultrafast electron microscopy (UEM) has emerged as an essential tool in materials science, enabling the study of nanoscale dynamics with high spatial, temporal, and energy resolutions. Building upon transmission electron microscopy (TEM), UEM similarly addresses a wide range of materials science questions …

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Statistically elucidated responses from low-signal contrast mechanisms in ultrafast electron microscopy

Spencer A. Reisbick, Alexandre Pofelski, Myung‐Geun Han, Chuhang Liu et autres

The emergence of ultrafast electron microscopy (UEM) has enabled the discovery of strongly correlated dynamic mechanisms, including electron–phonon coupling, structural phase transitions, thermal transport, and electromagnetic deflection. Most UEM systems operate stroboscopically, meaning that the technique is susceptible to artifacts, mistakes, and …

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Automated Process Control for Industrial Production of Alkali Antimonide Photocathodes

Vitaly Pavlenko, Eric Montgomery, Harish B. Bhandari

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In Situ Ultra-fast TEM Observation of Acoustic Excitation of 128° Y-X LiNbO3

Kayla A. Callaway, Spencer A. Reisbick, Shashi Poddar, Eric Montgomery et autres

During in situ electron microscopy observations, a variety of stimuli are controllably applied to a specimen during observations. Key examples of prior work in this area includes heating, cooling, electric and magnetic fields, liquids, gases, and applied strain [1]. For high-speed time-resolved …

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Advancements in Laser-Free UltraFast Electron Microscopy

D. Leonhardt, Eric Montgomery, Chunguang Jing, Bart Wyderski et autres

TEMs are used to connect photonics, nanodevice architecture, and biophysics, each with their individual intrinsic response times on the nanoscale. The continued evolution of applications and maturation of basic TEM instruments have not only created additional sectors in the electron microscopy industry …

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Ion-beam-assisted growth of cesium-antimonide photocathodes

Pallavi Saha, Eric Montgomery, Shashi Poddar, Oksana Chubenko et autres

We report on the novel use of a Cs+ ion gun for an ion-beam-assisted molecular-beam-epitaxy (IBA-MBE) method to sequentially deposit Cs-Sb cathodes on room temperature substrates as opposed to the standard technique of thermal evaporation on elevated-temperature substrates. The details of the …

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Erratum: “Theory of photoemission from cathodes with disordered surfaces” [J. Appl. Phys. 133, 053102 (2023)]

Pallavi Saha, Oksana Chubenko, J. K. Nangoi, T. A. Arias et autres

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Demonstration of thermal limit mean transverse energy from cesium antimonide photocathodes

Alimohammed Kachwala, Pallavi Saha, P.K. Bhattacharyya, Eric Montgomery et autres

The mean transverse energy (MTE) of electrons emitted from cathodes is a critical parameter that determines the brightness of electron beams for applications, such as x-ray free electron lasers, particle colliders, and ultrafast electron scattering experiments. Achieving a MTE close to the …

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Broadband Ultrafast Electron Microscopy Using Electrically Driven Pulse Generation

Spencer A. Reisbick, Myung‐Geun Han, Chuhang Liu, Alexandre Pofelski et autres

Advancements in electron microscopy technology have expanded the power of a TEM such that sub-angstrom spatial resolution and microsecond temporal resolution are common with modern detectors. Ultrafast electron microscopy (UEM) is a recent development that expands TEM capabilities to a broader temporal …

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Characterization of transverse electron pulse trains using RF powered traveling wave metallic comb striplines

Spencer A. Reisbick, Alexandre Pofelski, Myung‐Geun Han, Chuhang Liu et autres

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353 Cerebellar Tonsil Reduction for Surgical Treatment of Chiari I Malformation in Children

Eric Montgomery, Dale M. Swift, Mark Nicholas Pernik, Brett A. Whittemore et autres

INTRODUCTION: There remains much debate around ideal surgical technique for Chiari Malformation Type 1. Although recent trends favor less invasive techniques, growing evidence may support tonsillar reduction via resection or coagulation. METHODS: We retrospectively reviewed 456 consecutive children (<18 years of age) …

Theory of photoemission from cathodes with disordered surfaces

Pallavi Saha, Oksana Chubenko, J. K. Nangoi, T. A. Arias et autres

Linear-accelerator-based applications like x-ray free electron lasers, ultrafast electron diffraction, electron beam cooling, and energy recovery linacs use photoemission-based cathodes in photoinjectors for electron sources. Most of these photocathodes are typically grown as polycrystalline materials with disordered surfaces. In order to understand …

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