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The effect of mid-T heat treatment on flux trapping sensitivity was measured on several 1.3 GHz single cell cavities subjected to vacuum annealing at temperature of 150 - 400 $^\circ$C for a duration of 3 hours. The cavity was cooldown with…

Accelerator Physics · Physics 2024-05-17 Pashupati Dhakal , Bashu Dev Khanal , Eric Lechner , Gianluigi Ciovati

We quantify the effects of electron thermal conduction on the properties of hot accretion flows, under the assumption of spherical symmetry. Electron heat conduction is important for low accretion rate systems where the electron cooling…

Astrophysics · Physics 2011-02-11 Bryan M. Johnson , Eliot Quataert

The effect of fluid flow on crystal nucleation in supercooled liquids is not well understood. The variable density and temperature gradients in the liquid make it difficult to study this under terrestrial gravity conditions. Nucleation…

We demonstrate that the dynamic nuclear polarization (DNP) of phosphorus donors in silicon can be very effective in a magnetic field of 4.6 T and at temperatures below 1 K. The DNP occurs due to the Overhauser effect following a cross…

This paper investigates the impact of an applied magnetic field on the yield and hot-spot temperature of inertial confinement fusion implosions. A scaling of temperature amplification due to magnetization is shown to be in agreement with…

We calculate the energy and hydrostatic pressure densities of a hot quark-gluon plasma in thermal equilibrium through diagrammatic analyses of the statistical average, $\langle \Theta_{\mu \nu} \rangle$, of the energy-momentum-tensor…

High Energy Physics - Phenomenology · Physics 2016-08-15 Y. Hisamatsu , A. Niégawa

We study hydrogen plasmas at magnetic fields B ~ 10^{12}-10^{13} Gauss, densities ~ 10^{-3}-10^3 g/cc and temperatures T ~ 10^{5.5}-10^{6.5} K, typical of photospheres of middle-aged cooling neutron stars. We construct an analytical free…

Plasma Physics · Physics 2009-10-31 A. Y. Potekhin , G. Chabrier , Yu. A. Shibanov , J. Ventura

Sizable nuclear spin polarization is pumped in individual InP/GaInP dots in a wide range of external magnetic fields B_ext=0-5T by circularly polarized optical excitation. We observe nuclear polarization of up to ~40% at Bext=1.5T and…

We experimentally demonstrate a method for obtaining nuclear spin hyperpolarization, that is, polarization significantly in excess of that expected for a thermal equilibrium. By exploiting a modified Overhauser process, we obtain more than…

Materials Science · Physics 2009-02-26 D. R. McCamey , J. van Tol , G. W. Morley , C. Boehme

The effect of annealing in high pressure oxygen atmosphere on superconducting transition temperatures for ceramic samples of magnetic superconductor europium based 1222 ruthenocuprate was studied. It was shown that the properties of the…

Superconductivity · Physics 2020-06-08 E. Yu. Beliayev , I. G. Mirzoev

Differentially rotating flows of unmagnetized, highly conducting plasmas have been created in the Plasma Couette Experiment. Previously, hot-cathodes have been used to control plasma rotation by a stirring technique [C. Collins et al.,…

Nucleate boiling heat transfer (NBHT) from enhanced structures is an effective way to dissipate high heat flux. In the present study, the cavities behaviours for nucleation on roughened surface are numerically studied on the entire…

Fluid Dynamics · Physics 2016-08-11 Yu-Tong Mu , Li Chen , Qinjun Kang , Wen-Quan Tao

Our understanding of the core-collapse supernova explosion mechanism is incomplete. While the favoured scenario is delayed revival of the stalled shock by neutrino heating, it is difficult to reliably compute explosion outcomes and…

High Energy Astrophysical Phenomena · Physics 2022-03-08 Sarah E. Gossan , Jim Fuller , Luke F. Roberts

We study stimulated emission and absorption of gravitons in a squeezed vacuum state immersed in a thermal radiation bath. Employing one-loop interaction-picture perturbation theory, we track the time evolution of the graviton number…

Cosmology and Nongalactic Astrophysics · Physics 2025-07-16 Atsuhisa Ota

Bulk 13C polarization can be strongly enhanced in diamond at room-temperature based on the optical pumping of nitrogen-vacancy color centers. This effect was confirmed by irradiating suitably aligned single-crystals at a ~50 mT field…

In recent years, coronal loops have been the focus of studies related to the damping of different magnetohydrodynamic (MHD) surface waves and their connection with coronal seismology and wave heating. For a better understanding of wave…

Solar and Stellar Astrophysics · Physics 2019-03-06 K. Karampelas , T. Van Doorsselaere , M. Guo

The self-consistent inclusion of plasma effects in opacity calculations is a significant modeling challenge. As density increases, such effects can no longer be treated perturbatively. Building on a recently published model that addresses…

Plasma Physics · Physics 2024-10-08 C. E. Starrett , C. J. Fontes , H. B. Tran Tan , J. M. Kasper , J. R. White

We investigate the role of magnetic field on the gas dynamics in a galactic bulge region by three dimensional simulations with radiative cooling and heating. While high-temperature corona with $T>10^6\ {\rm K}$ is formed in the halo…

Astrophysics of Galaxies · Physics 2024-04-05 Kensuke Kakiuchi , Takeru. K. Suzuki , Shu-ichiro Inutsuka , Tsuyoshi Inoue , Jiro Shimoda

The helicity flux density is a novel quantity which characterizes the angle-dependence of the helicity of radiative gravitons and it may be tested by gravitational wave experiments in the future. We derive a quadrupole formula for the…

General Relativity and Quantum Cosmology · Physics 2025-01-28 Jiang Long , Run-Ze Yu

By molecular dynamics simulations, we have studied the enhanced heating process of salty ice and water by the electric field of applied microwaves at 2.5 GHz, and those in the range 2.5-10 GHz for the frequency dependence. We show that…

Materials Science · Physics 2008-08-18 Motohiko Tanaka , Motoyasu Sato