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A method for assessing the quality of electronic material properties of thin-film metal oxide semiconductor field-effect transistors (MOSFETs) is presented. By investigating samples with MOCVD-grown MoS${_2}$ channels exposed to atmospheric…

Applied Physics · Physics 2025-04-03 Eros Reato , Ardeshir Esteki , Benny Ku , Zhenxing Wang , Michael Heuken , Max C. Lemme , Olof Engström

We present a method to optimize absorption cells for precise wavelength calibration in the near-infrared. We apply it to design and optimize methane isotopologue cells for precision radial velocity measurements in the K band. We also…

Atomically thin semiconductors have versatile future applications in the information and communication technologies for the ultimate miniaturization of electronic components. In particular, the ongoing research demands not only a…

Deep learning has led to great progress in the detection of mobile (i.e. movement-capable) objects in urban driving scenes in recent years. Supervised approaches typically require the annotation of large training sets; there has thus been…

Computer Vision and Pattern Recognition · Computer Science 2022-09-22 Sangyun Shin , Stuart Golodetz , Madhu Vankadari , Kaichen Zhou , Andrew Markham , Niki Trigoni

Next-generation microreactors enable remote deployment and semi-autonomous operation, but compact, sealed, heterogeneous cores limit conventional safeguard approaches that rely on access and bulk accountancy. Limited inspection access and…

Applied Physics · Physics 2026-03-09 Reshma Ughade , Stylianos Chatzidakis

Carbon nanotubes (CNTs) are critical building blocks in nanotechnology, yet the characterization of their dynamic growth is limited by the experimental challenges in nanoscale motion measurement using scanning electron microscopy (SEM)…

Computer Vision and Pattern Recognition · Computer Science 2025-08-27 Kaveh Safavigerdini , Ramakrishna Surya , Jaired Collins , Prasad Calyam , Filiz Bunyak , Matthew R. Maschmann , Kannappan Palaniappan

We propose a novel probe technique capable of performing local low-temperature spectroscopy on a 2D electron system (2DES) in a semiconductor heterostructure. Motivated by predicted spatially-structured electron phases, the probe uses a…

Mesoscale and Nanoscale Physics · Physics 2011-01-06 Adam Sciambi , Matthew Pelliccione , Seth R. Bank , Arthur C. Gossard , David Goldhaber-Gordon

A system of two microchannel-plate detectors has been successfully implemented for tracking projectile-fragmentation beams. The detectors provide interaction positions, angles, and arrival times of ions at the reaction target. The current…

Band profiles of electronic devices are of fundamental importance in determining their properties. A technique that can map the band profile of both the interior and edges of a device at the nanometer scale is highly demanded. Conventional…

Mesoscale and Nanoscale Physics · Physics 2020-07-10 Ranran Li , Takashi Taniguchi , Kenji Watanabe , Jiamin Xue

Nb3Sn (Tc ~ 18 K and Hsh ~ 400 mT) is a prospective material to replace Nb (Tc ~ 9 K and Hsh ~ 200 mT) in SRF accelerator cavities for significant cost reduction and performance enhancement. Because of its material properties, Nb3Sn is best…

Accelerator Physics · Physics 2020-04-22 Uttar Pudasaini , Grigory V. Eremeev , Charles E. Reece , James Tuggle , Michael J. Kelley

We introduce a highly performant 3D object detector for point clouds using the DETR framework. The prior attempts all end up with suboptimal results because they fail to learn accurate inductive biases from the limited scale of training…

Computer Vision and Pattern Recognition · Computer Science 2023-08-09 Yichao Shen , Zigang Geng , Yuhui Yuan , Yutong Lin , Ze Liu , Chunyu Wang , Han Hu , Nanning Zheng , Baining Guo

The application of heat treatments on 1.3 GHz TESLA type cavities in ultra-high vacuum at 250{\deg}C to 350{\deg}C is called medium temperature or mid-T heat treatment. In various laboratories such treatments on superconducting radio…

Accelerator Physics · Physics 2024-07-18 L. Steder , C. Bate , K. Kasprzak , D. Reschke , L. Trelle , H. Weise , M. Wiencek

There is an increasing reckoning that the thermoelectric performance of a material is dependent on its microstructure. However, the microstructure-properties relationship often remains elusive, in part due to the complexity of the hierarchy…

SRF cavities for particle acceleration are conventionally operated immersed in a bath of liquid helium at 4.2 K and below. Although this cooling configuration is practically and economically viable for large scientific accelerator…

Accelerator Physics · Physics 2022-07-13 R. C. Dhuley , S. Posen , M. I. Geelhoed , J. C. T. Thangaraj

Anisotropic nanomaterials possess interesting thermal transport properties because they allow orientation of heat fluxes along preferential directions due to a high ratio (up to three orders of magnitude) between their in-plane and…

Materials Science · Physics 2017-01-10 Mykola Isaiev , Oles Didukh , Tetyana Nychyporuk , Victor Timoshenko , Vladimir Lysenko

Nitrogen-doping and furnace-baking are advanced high-Q0 recipes developed for 1.3 GHz TESLA-type cavities. These treatments will significantly benefit the high-Q0 linear accelerator community if they can be successfully adapted to different…

Direct detection of superconductivity has long been a key strength of point-contact Andreev reflection. However, its applicability to atomic-scale imaging is limited by the mechanical contact of the Andreev probe. To this end, we present a…

Superconductivity · Physics 2024-04-23 Wonhee Ko , Jose L. Lado , Petro Maksymovych

Nb3Sn is a promising next-generation material for superconducting radiofrequency cavities, with significant potential for both large scale and compact accelerator applications. However, so far, Nb3Sn cavities have been limited to cw…

Accelerator Physics · Physics 2021-02-03 S. Posen , J. Lee , D. N. Seidman , A. Romanenko , B. Tennis , O. S. Melnychuk , D. A. Sergatskov

The properties of molecular gas, the fuel that forms stars, inside the cavity of the circumnuclear disk (CND) are not well constrained. We present results of a velocity-resolved submillimeter scan (~480 to 1250 GHz}) and [CII]158um line…

Astrophysics of Galaxies · Physics 2018-08-22 Javier R. Goicoechea , M. G. Santa-Maria , D. Teyssier , J. Cernicharo , M. Gerin , J. Pety

We have fabricated arrays of High-T$_c$ Superconducting Quantum Interference Devices (SQUIDs) with randomly distributed loop sizes as sensitive antennas for Radio-Frequency (RF) waves. These sub-wavelength size devices known as…

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