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Next-generation particle accelerators demand advanced beam-diagnostic capabilities to ensure high performance, operational reliability, and sustainable machine operation. Increasing beam intensities and stored energies make the precise…

Accelerator Physics · Physics 2026-03-10 Francis René Osswald , Mohammed Chahbaoui , Xinyi Liang

We report pulse energy scaling enabled by the use of Laguerre-Gaussian single-vortex ($\text{LG}_{0,l}$) beams for spectral broadening in a sub-40 cm long Herriott-type bulk multi-pass cell. Beams with orders ${l= 1-3}$ are generated by a…

We report on the realization of an all-fiber laser source that delivers single-frequency pulses at 1645 nm, on a linearly polarized single-mode beam, based on stimulated Raman scattering in passive fibers. The pulse energy reaches 14…

The fast algorithms in Fourier optics have invigorated multifunctional device design and advanced imaging technologies. However, the necessity for fast computations has led to limitations in the widely used conventional Fourier methods,…

Applied Physics · Physics 2024-06-25 Zhi Li , Xuhao Luo , Jing Wang , Xin Yuan , Dongdong Teng , Qiang Song , Huigao Duan

Power Density Spectrum (PDS) is one of the powerful tools to study light curves of gamma-ray bursts (GRBs). We show the average PDS and individual PDS analysis with {\it Hard X-ray Modulation Telescope} (also named \insighthxmt) GRBs data.…

High Energy Astrophysical Phenomena · Physics 2024-10-21 Zi-Min Zhou , Xiang-Gao Wang , En-Wei Liang , Jia-Xin Cao , Hui-Ya Liu , Cheng-Kui Li , Bing Li , Da-Bin Lin , Tian-Ci Zheng , Rui-Jing Lu

We use SDSS imaging data in $ugriz$ passbands to study the shape of the point spread function (PSF) profile and the variation of its width with wavelength and time. We find that the PSF profile is well described by theoretical predictions…

Instrumentation and Methods for Astrophysics · Physics 2018-10-31 Bo Xin , Željko Ivezić , Robert H. Lupton , John R. Peterson , Peter Yoachim , R. Lynne Jones , Charles F. Claver , George Angeli

This paper addresses simultaneous, high-precision measurement and analysis of generic reference signals by using inexpensive commercial off-the-shelf Software Defined Radio hardware. Sine reference signals are digitally down-converted to…

Signal Processing · Electrical Eng. & Systems 2018-04-12 Carsten Andrich , Alexander Ihlow , Julia Bauer , Niklas Beuster , Giovanni Del Galdo

Reconfigurable intelligent surfaces (RISs) provide an interface between the electromagnetic world of wireless propagation environments and the digital world of information science. Simple yet sufficiently accurate path loss models for RISs…

Signal Processing · Electrical Eng. & Systems 2022-08-29 Wankai Tang , Xiangyu Chen , Ming Zheng Chen , Jun Yan Dai , Yu Han , Marco Di Renzo , Shi Jin , Qiang Cheng , Tie Jun Cui

This work discusses the suitability of typical power line communication (PLC) pulses for fault sensing in power lines via pulse-compression time-domain reflectometry (TDR). For this purpose, we first carefully outline a TDR system operating…

Signal Processing · Electrical Eng. & Systems 2019-01-24 Lucas Giroto de Oliveira , Mateus de L. Filomeno , Luiz Fernando Colla , H. Vincent Poor , Moisés V. Ribeiro

A novel phase-space source implementation has been designed for GPU-based Monte Carlo dose calculation engines. Due to the parallelized nature of GPU hardware, it is essential to simultaneously transport particles of the same type and…

Medical Physics · Physics 2013-06-21 Reid Townson , Xun Jia , Zhen Tian , Yan Jiang Graves , Sergei Zavgorodni , Steve B Jiang

While industrial-grade Yb-based amplifiers have become very prevalent, their limited gain bandwidth has created a large demand for robust spectral broadening techniques that allow for few-cycle pulse compression. In this work, we perform a…

Using GHz repetition rate pulses in burst mode has demonstrated numerous advantages for highly efficient material removal. In this work, we present high-speed (over 100 kHz) micro-laser-induced breakdown spectroscopy (micro-LIBS) with…

Optics · Physics 2025-02-18 Ayesha Noor , Emre Hasar , Parviz Elahi

Ultrashort, low-emittance electron pulses can be created at a high repetition rate by using a TM$_{110}$ deflection cavity to sweep a continuous beam across an aperture. These pulses can be used for time-resolved electron microscopy with…

Applied Physics · Physics 2018-04-24 W. Verhoeven , J. F. M. van Rens , E. R. Kieft , P. H. A. Mutsaers , O. J. Luiten

Modeling of frequency-dependent effects, contributed by the turbulence in the free electron density of interstellar plasma, is required to enable the detection of the expected imprints from the stochastic gravitational-wave (GW) background…

The serrodyne principle enables shifting the frequency of an electromagnetic signal by applying a linear phase ramp in the time domain [1]. This phenomenon has been exploited to frequency-shift signals in the radiofrequency (RF), microwave…

Shear bands resulting from plastic deformation in cold-rolled Al$_{88}$Y$_{7}$Fe$_{5}$ metallic glass were observed to display alternating density changes along their propagation direction. Electron-energy loss spectroscopy (EELS) was used…

Ultrasound imaging systems rely on accurate point spread function (PSF) estimation to support advanced image quality enhancement techniques such as deconvolution and speckle reduction. Phase aberration, caused by sound speed inhomogeneity…

Signal Processing · Electrical Eng. & Systems 2025-02-24 Wei-Hsiang Shen , Yu-An Lin , Meng-Lin Li

Multi-pass cell (MPC) compressors have proven to be the method of choice for compression of high average power long-pulse Yb lasers. Yet, generating sub-30 fs pulses at high pulse energy with compact and simple components remains a…

The reflection characteristics of a reconfigurable intelligent surface (RIS) depend on the phase response of the constituent unit cells, which is necessarily frequency dependent. This paper investigates the role of an RIS constituting unit…

Information Theory · Computer Science 2023-08-29 Omran Abbas , Qurrat-Ul-Ain Nadeem , Loïc Markley , Anas Chaaban