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Heat-based cancer treatment, so-called hyperthermia, can be used to destroy tumour cells directly or to make them more susceptible to chemotherapy or radiation therapy. To apply heat locally, iron oxide nanoparticles are injected into the…

Computational Engineering, Finance, and Science · Computer Science 2025-02-04 Barbara Wirthl , Paolo Decuzzi , Bernhard A. Schrefler , Wolfgang A. Wall

We demonstrate the measurement and manipulation of the temperature of cold CO molecules in a microchip environment. Through the use of time-resolved spatial imaging, we are able to observe the phase-space distribution of the molecules, and…

Sympathetic cooling of trapped ions has become an indispensable tool for quantum information processing and precision spectroscopy. In the simplest situation a single Doppler-cooled ion sympathetically cools another ion which typically has…

Atomic Physics · Physics 2013-05-30 Jannes B. Wübbena , Sana Amairi , Olaf Mandel , Piet O. Schmidt

At present, there is a worldwide effort to use cold atoms to simulate strongly correlated quantum many-body systems. It is hoped that these "simulations" will provide solutions to many unsolved problems. However, the relevant energy scales…

Quantum Gases · Physics 2009-12-01 Tin-Lun Ho , Qi Zhou

We apply an analytical approach for determining the near-field radiative heat transfer between a metallic nanosphere and a planar semi-infinite medium with some given surface structure. This approach is based on a perturbative expansion,…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Svend-Age Biehs , Oliver Huth , Felix Rüting

Hot (explosive) hydrogen burning or the Rapid Proton Capture Process (rp-process) occurs in a number of astrophysical environments. Novae and X-ray bursts are the most prominent ones, but accretion disks around black holes and other sites…

Astrophysics · Physics 2016-08-30 F. Rembges , C. Freiburghaus , T. Rauscher , F. -K. Thielemann , H. Schatz , M. Wiescher

Currently laser cooling schemes are fundamentally based on the weak coupling regime. This requirement sets the trap frequency as an upper bound to the cooling rate. In this work we present a numerical study that shows the feasibility of…

Quantum Physics · Physics 2015-05-18 S. Machnes , M. B. Plenio , B. Reznik , A. M. Steane , A. Retzker

The problems of stripper target behavior in the nonstationary intense particle beams are considered. The historical sketch of studying of radiation damage failure of carbon targets under ion bombardment is presented. The simple model of…

Accelerator Physics · Physics 2008-11-26 S. G. Lebedev , A. S. Lebedev

We explore near-field radiative heat transfer between two bodies under time modulation by developing a rigorous fluctuational electrodynamics formalism. We demonstrate that time modulation can results in the enhancement, suppression,…

Optics · Physics 2024-04-24 Renwen Yu , Shanhui Fan

Artificial Intelligence (AI) surrogate models provide a computationally efficient alternative to full-physics simulations, but no public datasets currently exist for training and validating models of high-explosive-driven, multi-material…

Understanding the dynamics of positron cooling in gases, including the fraction of positrons surviving to thermalisation, is critical for accurate interpretation of positron lifetime spectra, for the development of efficient positron…

Atomic Physics · Physics 2017-11-22 D. G. Green

Quantum simulation aims to recreate complex many-body phenomena in controlled environments, offering insights into dynamics that are otherwise difficult to model. Existing platforms, however, are often complex and costly to scale, typically…

This study was undertaken to develop a system for heat transfer simulation for optimization and treatment planning of magnetic hyperthermia treatment (MHT) using magnetic particle imaging (MPI). First, we performed phantom experiments to…

Medical Physics · Physics 2016-05-27 Natsuo Banura , Atsushi Mimura , Kohei Nishimoto , Kenya Murase

Stellar nuclear fusion reactions take place in a hot, dense plasma within stars. To account for the effect of these environments, the theory of open quantum systems is used to conduct pioneering studies of thermal and atomic effects on…

Nuclear Theory · Physics 2023-05-18 Iain Lee , Gilbert Gosselin , Alexis Diaz-Torres

A mathematical model has been developed to simulate the kinetic and thermal behaviour of a porous solid pellet undergoing chemical reaction with a gas. The model describes the chemical reaction itself, the transfer of the gaseous species…

Chemical Physics · Physics 2016-12-14 F Patisson , D Ablitzer

A critical relation in the study of neutron star cooling is the one between surface temperature and interior temperature. This relation is determined by the composition of the neutron star envelope and can be affected by the process of…

High Energy Astrophysical Phenomena · Physics 2019-03-13 M. J. P. Wijngaarden , Wynn C. G. Ho , Philip Chang , Craig O. Heinke , Dany Page , Mikhail Beznogov , Daniel J. Patnaude

The interaction between an ultrastrong laser and a cone-like target is an efficient approach to generate high power radiations like attosecond pulses and terahertz waves. The object is to study the $\gamma$-ray generation under this…

Plasma Physics · Physics 2022-06-28 Cui-Wen Zhang , Yi-Xuan Zhu , Jian-Feng Lv , Bai-Song Xie

We present a combined experimental and theoretical study of beam formation from a cryogenic buffer gas cell. Atoms and molecules are loaded into the cell by laser ablation of a target, and are cooled and swept out of the cell by a flow of…

Atomic Physics · Physics 2017-09-13 N. E. Bulleid , S. M. Skoff , R. J. Hendricks , B. E. Sauer , E. A. Hinds , M. R. Tarbutt

We simulated the response of a 4p calorimetric g-detector array to decays of radioactive isotopes on the s-process path. The GEANT 3.21 simulation package was used. The main table contains estimates on the maximum sample size and required…

Nuclear Experiment · Physics 2009-10-01 A. Couture , R. Reifarth

We study how jets driven by active galactic nuclei influence the cooling flow in Perseus-like galaxy cluster cores with idealised, non-relativistic, hydrodynamical simulations performed with the Eulerian code ATHENA using high-resolution…

Astrophysics of Galaxies · Physics 2018-12-12 Davide Martizzi , Eliot Quataert , Claude-Andre Faucher-Giguere , Drummond Fielding