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A low temperature oven has been developed to produce calcium beam with Electron Cyclotron Resonance Ion Source (ECRIS). The atom flux from the oven has been studied experimentally as a function of the temperature and the angle of emission…

加速器物理 · 物理学 2021-04-28 A. Leduc , T. Thuillier , L. Maunoury , O. Bajeat

In this paper, we present a theoretical study aimed at investigating the rate-limiting factors in thin-film evaporative heat transfer processes, considering the finite-rate evaporation kinetics. The problems of evaporation of a flat…

流体动力学 · 物理学 2024-05-31 H. Zhao , R. Poole , Z. Zhou

The cold emission of particles from surfaces under intense electric fields is a process which underpins a variety of applications including atom probe tomography (APT), an analytical microscopy technique with near-atomic spatial resolution.…

We self-consistently estimate the outflow rate from the accretion rates of an accretion disk around a black hole in which both the Keplerian and the sub-Keplerian matter flows simultaneously. While Keplerian matter supplies soft-photons,…

天体物理学 · 物理学 2009-11-10 Santabrata Das , Indranil Chattopadhyay , A. Nandi , Sandip K. Chakrabarti

Ultrasonic wave attenuation({\alpha}) measurement by pulse-echo method exhibits pronounced dependence on experimental conditions. It is shown to be an inherent characteristic of the method itself. Estimation of {\alpha} from the component…

其他凝聚态物理 · 物理学 2018-05-14 Barnana Pal

Specific heat C_{p}(T) measurements of the heavy fermion normal-spinel structure compound LiV_{2}O_{4} were carried out using a heat-pulse calorimeter over the temperature T range from 1.2 to 108 K. The electronic specific heat C_{e}(T) of…

强关联电子 · 物理学 2010-11-12 D. C. Johnston , C. A. Swenson , S. Kondo

The role of impurity radiation in the reduction of heat loads on divertor plates in present experiments such as DIII-D, JET, JT-60, ASDEX, and Alcator C-Mod, and in planned experiments such as ITER and TPX places a new degree of importance…

plasm-ph · 物理学 2009-10-28 R. Clark , J. Abdallah , D. Post

Recently, it was noted that absorptive corrections to the electromagnetic form factor in high-energy proton-proton scattering are important for the theoretical interpretation of the $p^\uparrow{p}$ and $p^\uparrow{A}$ analyzing power…

高能物理 - 唯象学 · 物理学 2024-09-18 Andrei Poblaguev

It is well established that stellar effective temperatures determined from photometry and spectroscopy yield systematically different results. We describe a new, simple method to correct spectroscopically derived temperatures ("excitation…

星系天体物理 · 物理学 2015-06-15 Anna Frebel , Andrew R. Casey , Heather R. Jacobson , Qinsi Yu

The floating potential of a probe, emitting a sufficiently high electron current, yields a fairly accurate approximation of the plasma potential. This is an advantage in comparison to the conventional Langmuir probe where, after…

等离子体物理 · 物理学 2007-05-23 Ramin Madani , Codrina Ionita , Roman Schrittwieser , Thomas Klinger

We describe the method allowing quantitative interpretation of absorptive images of mixtures of BEC and thermal atoms which reduces possible systematic errors associated with evaluation of the contribution of each fraction. By using known…

其他凝聚态物理 · 物理学 2015-05-13 J. Szczepkowski , R. Gartman , M. Witkowski , L. Tracewski , M. Zawada , W. Gawlik

A machine learning approach has been implemented to measure the electron temperature directly from the emission spectra of a tokamak plasma. This approach utilized a neural network (NN) trained on a dataset of 1865 time slices from…

等离子体物理 · 物理学 2021-04-14 C. M. Samuell , A. G. Mclean , C. A. Johnson , F. Glass , A. E. Jaervinen

The Dark Matter Particle Explorer (DAMPE) is a satellite-borne detector designed to detect high-energy cosmic ray particles with its core component being a BGO calorimeter capable of measuring energies from $\sim$GeV to $O(100)$ TeV. The 32…

高能物理 - 实验 · 物理学 2025-10-07 JingJing Zang , Chuan Yue , Qiang Yuan , Wei Jiang , Xiang Li , Yunlong Zhang , Cong Zhao , Fabio Gargano

A simple way to visualize event-by-event average $p_T$ fluctuations is by assuming that each collision has a different temperature parameter (inverse $p_T$ slope) and that the ensemble of events has a temperature distribution about the…

核实验 · 物理学 2019-08-14 M. J. Tannenbaum

We study steady-state evaporation in an atom guide via Monte Carlo simulations. The evaporation surface follows a specific profile as a function of longitudinal guide location. We demonstrate that the choice of evaporation profile…

原子物理 · 物理学 2014-10-22 Spencer E. Olson , Georg Raithel , Andrew J. Christlieb

Doppler-broadening thermometry (DBT) can be used as a calibration-free primary reference suitable for practical applications, e.g. reliably measuring temperatures over long periods of time in environments where sensor retrieval is…

原子物理 · 物理学 2026-01-14 Nicola Agnew , Veronika Vohníková , Erling Riis , Graham Machin , Aidan S. Arnold

Thermal ablation procedures, such as high intensity focused ultrasound (HIFU) and Radiofrequency Ablation (RFA), are often used to eliminate tumors by minimally invasively heating a focal region. For this task, real-time 3D temperature…

医学物理 · 物理学 2023-01-18 Nathan Wang , Mengzhou Li , Petteri Haverinen

We present a technique based on high resolution imaging to measure the absolute temperature and the heating rate of a single ion trapped at the focus of a deep parabolic mirror. We collect the fluorescence light scattered by the ion during…

We investigate the thermal stability of the outer layers of accretion discs in which the local viscous energy dissipation rate scales with the pressure as for standard Shakura-Sunyaev discs. By solving for the accretion disc vertical…

天体物理学 · 物理学 2009-10-31 Martijn de Kool , Dayal T. Wickramasinghe

Perfect fluids are characterized as having the smallest ratio of shear viscosity to entropy density, {\eta}/s, consistent with quantum uncertainty and causality. So far, nearly perfect fluids have only been observed in the Quark-Gluon…

强关联电子 · 物理学 2014-11-26 J. D. Rameau , T. J. Reber , H. -B. Yang , S. Akhanjee , G. D. Gu , S. Campbell , P. D. Johnson