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Superconducting radio-frequency (SRF) niobium cavities are critical for modern particle accelerators, as well as for advancing superconducting quantum systems and enabling ultra-sensitive searches for new physics. In this work, we report a…

Accelerator Physics · Physics 2025-05-21 D. Bafia , A. Grassellino , M. Checchin , J. F. Zasadzinski , A. Romanenko

Scanning superconducting quantum interference device (SQUID) microscopy is a magnetic imaging technique combining high-field sensitivity with nanometer-scale spatial resolution. State-of-the-art SQUID-on-tip probes are now playing an…

Mesoscale and Nanoscale Physics · Physics 2022-03-03 M. Wyss , K. Bagani , D. Jetter , E. Marchiori , A. Vervelaki , B. Gross , J. Ridderbos , S. Gliga , C. Schönenberger , M. Poggio

In recent years, the progress on low temperature detector technologies has allowed design of large scale experiments aiming at pushing down the sensitivity on the neutrino mass below 1\,eV. Even with outstanding performances in both energy…

As progress towards real implementations of cryogenic high gradient normal conducting accelerating cavities continues, a more mature understanding of the surface physics in this novel environment becomes increasingly necessary. To this end,…

Accelerator Physics · Physics 2023-10-19 Gerard Lawler , Fabio Bosco , James Rosenzweig

Intrinsic Josephson junctions in high-temperature superconductor Bi2Sr2CaCu2O8 are known for their capability to emit high-power terahertz photons with widely tunable frequencies. Hotspots, as inhomogeneous temperature distributions across…

Superconductivity · Physics 2020-07-15 Xianjing Zhou , Xu Han , Dieter Koelle , Reinhold Kleiner , Xufeng Zhang , Dafei Jin

Nanoscale hot spots forming tens of nanometers beneath the gate in advanced FinFET and HEMT devices drive heat transport into a non-Fourier regime, challenging conventional (Fourier-based) finite-element (FEM) analyses and complicating…

Mesoscale and Nanoscale Physics · Physics 2026-01-01 Tanvirul Abedien , Tianli Feng

Hetero-epitaxial crystalline films underlie many electronic and optical technologies but are prone to forming defects at their hetero-interfaces. Atomic-scale defects such as threading dislocations that propagate into a film impede the flow…

We present precision spectroscopy on electrically trapped formaldehyde (H$_2$CO), demonstrating key attributes which will enable molecular spectroscopy with unprecedented precision. Our method makes use of a microstructured electric trap…

Atomic Physics · Physics 2018-07-19 Alexander Prehn , Martin Ibrügger , Gerhard Rempe , Martin Zeppenfeld

Cool-down dynamics of superconducting accelerating cavities became particularly important for obtaining very high quality factors in SRF cavities. Previous studies proved that when cavity is cooled fast, the quality factor is higher than…

Accelerator Physics · Physics 2015-04-22 M. Martinello , A. Romanenko , M. Checchin , A . Grassellino , A. C. Crawford , A. Melnychuk , D. A. Sergatskov

Jet flavour tagging is crucial in experimental high-energy physics. A tagging algorithm, DeepJetTransformer, is presented, which exploits a transformer-based neural network that is substantially faster to train than state-of-the-art graph…

High Energy Physics - Experiment · Physics 2025-02-11 Freya Blekman , Florencia Canelli , Alexandre De Moor , Kunal Gautam , Armin Ilg , Anna Macchiolo , Eduardo Ploerer

We propose a laboratory-scale experiment to locally measure the general relativistic frame-dragging effect on Earth using the macroscopic quantum properties of a novel superfluid $^4$He single Josephson junction gyrometer. We derive the…

Quantum Physics · Physics 2025-10-24 Kai-Isaak Ellers , Marios Christodoulou , K. C. Schwab , K. Birgitta Whaley

Tracer particles designed specifically for X-ray particle tracking and imaging velocimetry (XPTV and XPIV) are necessary to widen the range of flows that can be studied with these techniques. In this study, we demonstrate in-lab XPTV using…

Fluid Dynamics · Physics 2022-11-30 Jason T. Parker , Jessica DeBerardinis , Simo A. Mäkiharju

Since the late '80s, CERN has pioneered the development of niobium thin film radio-frequency (RF) cavities deposited on copper substrates for several particle accelerator applications. However, niobium thin film cavities historically…

Accelerator Physics · Physics 2023-05-17 Antonio Bianchi , Walter Venturini Delsolaro

The STAR Silicon Strip Detector (SSD) completes the three layers of the Silicon Vertex Tracker (SVT) to make an inner tracking system located inside the Time Projection Chamber (TPC). This additional fourth layer provides two dimensional…

Multi-Object Tracking in thermal images is essential for surveillance systems, particularly in challenging environments where RGB cameras struggle due to low visibility or poor lighting conditions. Thermal sensors enhance recognition tasks…

Computer Vision and Pattern Recognition · Computer Science 2025-07-04 Duong Nguyen-Ngoc Tran , Long Hoang Pham , Chi Dai Tran , Quoc Pham-Nam Ho , Huy-Hung Nguyen , Jae Wook Jeon

To achieve Ampere-class electron beam accelerators the pulse delivery rate need to be much higher than the typical photo injector repetition rate of the order of a few kilohertz. We propose here an injector which can, in principle, generate…

Accelerator Physics · Physics 2022-09-13 Y. Ji , R. C. Dhuley , C. Edward , J. C. T. Thangaraj , D. Mihalcea , P. Piot O. Mohsen , I. Salehinia , V. Korampally

The axion is a hypothetical particle which is a candidate for cold dark matter. Haloscope experiments directly search for these particles in strong magnetic fields with RF cavities as detectors. The Relic Axion Detector Exploratory Setup…

Scanning tunneling microscope (STM) is a powerful tool for studying the structural and electronic properties of materials at the atomic scale. The combination of low temperature and high magnetic field for STM and related spectroscopy…

Materials Science · Physics 2018-11-13 Syu-You Guan , Hsien-Shun Liao , Bo-Jing Juang , Shu-Cheng Chin , Tien-Ming Chuang , Chia-Seng Chang

We demonstrate a simple capacitive based method to quickly and efficiently locate micron size conductive samples on insulating substrates in a scanning tunneling microscope (STM). By using edge recognition the method is designed to locate…

Mesoscale and Nanoscale Physics · Physics 2014-02-04 Guohong Li , Adina Luican , Eva Y. Andrei