Publications (15)
Error estimates for a helicity-preserving finite element discretisation of an incompressible magnetohydrodynamics system
L. Beirao da Veiga, K. Hu, L. Mascotto
We derive error estimates of a finite element method for the approximation of solutions to a seven-fields formulation of a magnetohydrodynamics model, which preserves the energy of…
Systematic effects on a Compton polarimeter at the focus of an X-ray mirror
M. Aoyagi, R. G. Bose, S. Chun +23
XL-Calibur is a balloon-borne Compton polarimeter for X-rays in the 15-80 keV range. Using an X-ray mirror with a 12 m focal length for collecting photons onto a beryllium sc…
The New Small Wheel electronics
G. Iakovidis, L. Levinson, Y. Afik +99
The increase in luminosity, and consequent higher backgrounds, of the LHC upgrades require improved rejection of fake tracks in the forward region of the ATLAS Muon Spectrometer. T…
Science Prospects for the Southern Wide-field Gamma-ray Observatory: SWGO
SWGO Collaboration, P. Abreu, R. Alfaro +303
Ground-based gamma-ray astronomy is now well established as a key observational approach to address critical topics at the frontiers of astroparticle physics and high-energy astrop…
Quantifying signals with power-law correlations: A comparative study of detrended fluctuation analysis and detrended moving average techniques
L. Xu, P. Ch. Ivanov, K. Hu +3
Detrended fluctuation analysis (DFA) and detrended moving average (DMA) are two scaling analysis methods designed to quantify correlations in noisy non-stationary signals. We syste…
Beam-test evaluation of pre-production Low Gain Avalanche Detectors for the ATLAS High Granularity Timing Detector
A. Aboulhorma, M. Ait Tamlihat, H. M. Alfanda +223
The High Granularity Timing Detector (HGTD) will be installed in the ATLAS experiment as part of the Phase-II upgrade for the High Luminosity-Large Hadron Collider (HL-LHC). It wil…
IXPE observation confirms a high spin in the accreting black hole 4U 1957+115
L. Marra, M. Brigitte, N. Rodriguez Cavero +113
We present the results of the first X-ray polarimetric observation of the low-mass X-ray binary 4U 1957+115, performed with the Imaging X-ray Polarimetry Explorer in May 2023. The…
Thermal Cycling Reliability of Hybrid Pixel Sensor Modules for The ATLAS High Granularity Timing Detector
Y. Li, A. Aboulhorma, M. Ait Tamlihat +219
The reliability of bump connection structures has become a critical aspect of future silicon detectors for particle physics. The High Granularity Timing Detector (HGTD) for the ATL…
Relativistic light synthesis of femtosecond sawtooth pulses
K. Hu, H. -C. Wu
Formation of femtosecond sawtooth pulses by high harmonic generation from relativistic oscillating mirrors is studied. For oblique incidence of -polarized laser pulse, one can e…
Competing Lattice and Defect Dynamics Govern Terahertz-Induced Ferroelectricity in Quantum Paraelectric SrTiO
L. Cheng, K. Hu, S. Yang +3
Intense terahertz (THz) pulses induce transient inversion-symmetry breaking in quantum paraelectric SrTiO, yet the underlying mechanism remains controversial. Using fields up t…
Unveiling the Hybridization Process in a Quantum Critical Ferromagnet by Ultrafast Optical Spectroscopy
Y. H. Pei, Y. J. Zhang, Z. X. Wei +5
We report the ultrafast optical pump-probe spectroscopy measurements on the recently discovered quantum critical ferromagnet CeRhGe. Our experimental results reveal the two…
Recovery of the X-ray polarisation of Swift J1727.81613 after the soft-to-hard spectral transition
J. Podgorný, J. Svoboda, M. DovÄiak +34
We report on the detection of X-ray polarisation in the black-hole X-ray binary Swift J1727.81613 during its dim hard spectral state by the Imaging X-ray Polarimetry Explorer (I…
Effect of nonlinear filters on detrended fluctuation analysis
Z. Chen, K. Hu, P. Carpena +3
We investigate how various linear and nonlinear transformations affect the scaling properties of a signal, using the detrended fluctuation analysis (DFA). Specifically, we study th…
Steady-state visual evoked potentials and phase synchronization in migraine
L. Angelini, M. De Tommaso, M. Guido +8
We investigate phase synchronization in EEG recordings from migraine patients. We use the analytic signal technique, based on the Hilbert transform, and find that migraine brains a…
STCF Conceptual Design Report: Volume 1 -- Physics & Detector
M. Achasov, X. C. Ai, R. Aliberti +424
The Super -Charm facility (STCF) is an electron-positron collider proposed by the Chinese particle physics community. It is designed to operate in a center-of-mass energy range…