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Among primordial magnetogenesis models, inflation is a prime candidate to explain the current existence of cosmological magnetic fields. Assuming conformal invariance to be restored after inflation, their energy density decreases as…

Cosmology and Nongalactic Astrophysics · Physics 2012-05-11 Vittoria Demozzi , Christophe Ringeval

Recent experiments at the National Ignition Facility (NIF) have demonstrated ignition for the first time in an inertial confinement fusion (ICF) experiment, a major milestone allowing the possibility of high energy gain through burn…

The fast ignition paradigm for inertial confinement fusion (ICF) allows for extremely high gains but requires fuel to be heated very quickly to outpace hotspot disassembly and energy losses. This demands lasers with high power and…

Plasma Physics · Physics 2026-02-16 Benjamin Wang , Henry Fetsch , Nathaniel J. Fisch

A theoretical model is considered to predict the minimum ambient gas temperature at which fine iron particles can undergo thermal runaway--the ignition temperature. The model accounts for Knudsen transition transport effects, which become…

Fluid Dynamics · Physics 2023-07-06 Joel Jean-Philyppe , Aki Fujinawa , Jeffrey M. Bergthorson , XiaoCheng Mi

The National Ignition Facility(NIF) megajoule laser at the Lawrence Livermore National Laboratory(LLNL)\cite{moses} has produced a significant amount of useful physics results related to inertial confinement fusion since it began operating…

Plasma Physics · Physics 2022-08-30 Gene H. MCall

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…

The spontaneous onset of magnetic reconnection in thin collisionless current sheets is shown to result from a thermal-anisotropy driven magnetic Weibel-mode, generating seed-magnetic field {\sf X}-points in the centre of the current layer.

Space Physics · Physics 2011-05-13 R. A. Treumann , R. Nakamura , W. Baumjohann

Mounting evidence from $x$-ray observations reveals that bound objects should receive some form of energy in the past injected from non-gravitaional sources. We report that an instantaneous heating scheme, for which gases in dense regions…

Astrophysics · Physics 2009-11-07 Kai-Yang Lin , Lihwai Lin , Tak-Pong Woo , Yao-Huan Tseng , Tzihong Chiueh

Thermal radiation of the hot combustion products usually does not influence noticeably the flame propagating through gaseous mixture. the situation is changed drastically in the presence even small concentration of particles, which absorb…

Fluid Dynamics · Physics 2015-09-30 M. F. Ivanov , A. D. Kiverin , M. A. Liberman

We have studied the low-temperature behavior of the magnetization and the specific heat of the bilayered perovskite system $% La_{2-2x}Sr_{1+2x}Mn_{2}O_{7}$, for $0.30\leq x\leq 0.50$. Our analysis reveals that below 30 K the temperature…

Materials Science · Physics 2009-11-07 H. Martinho , C. Rettori , D. L. Huber , S. B. Oseroff , J. F. Mitchell

This letter presents the physics and feasibility of reactor antineutrino monitoring to verify the burnup of plutonium loaded in the reactor as a Mixed Oxide (MOX) fuel. It examines the magnitude and temporal variation in the antineutrino…

Nuclear Theory · Physics 2013-05-30 A. C. Hayes , H. R. Trellue , Michael Martin Nieto , W. B. WIlson

Five characteristic temperatures of TM = 148 K, TN = 142 K, Tt = 138 K, Tf ~ 125 K and Tg ~ 50 K were found by the measurements of the magnetization curves at various temperature. The spontaneous magnetization appears below TM. It increases…

Strongly Correlated Electrons · Physics 2015-06-12 Hiroya Sakurai

Ultrafast magnetization dynamics of nickel has been studied for different degrees of electronic excitation, using pump-probe second-harmonic generation with 150 fs/800 nm laser pulses of various fluences. Information about the electronic…

Condensed Matter · Physics 2009-10-30 J. Hohlfeld , E. Matthias , R. Knorren , K. -H. Bennemann

We present hybrid PIC simulations of fast electron transport and energy deposition in pre-compressed fusion targets, taking full account of collective magnetic effects and the hydrodynamic response of the background plasma. Results on…

Plasma Physics · Physics 2009-11-13 J. J. Honrubia , J. Meyer-ter-Vehn

The Minimum Ignition Energy (MIE) of an initially Gaussian temperature profile is found both by Direct Numerical Simulations (DNS) and from a new novel model. The model is based on solving the heat diffusion equation in zero dimensions for…

Chemical Physics · Physics 2011-10-07 Jens Tarjei Jensen , Nils Erland L. Haugen , Natalia Babkovskaia

We consider Dirac fermions moving in a plane with a static homogeneous magnetic field orthogonal to the plane. We calculate the effective action at finite temperature and density. The magnetization is derived and it is shown that the…

Condensed Matter · Physics 2011-07-19 Jens O. Andersen , Tor Haugset

Magnetic field generation in ultra-intense laser-solid interactions is studied over a range of laser intensities relevant to next-generation laser facilities ($a_0 = 50-500$) using 2D particle-in-cell simulations. It is found that fields on…

Plasma energization through magnetic reconnection in the magnetically-dominated regime featured by low plasma beta ($\beta = 8 \pi nkT_0/B^2 \ll 1$) and/or high magnetization ($\sigma = B^2/(4 \pi nmc^2) \gg 1$) is important in a series of…

High Energy Astrophysical Phenomena · Physics 2016-05-25 Fan Guo , Hui Li , William Daughton , Xiaocan Li , Yi-Hsin Liu

Inertial Confinement Fusion is a promising option to provide massive, clean, and affordable energy for humanity in the future. The present status of research and development is hindered by hydrodynamic instabilities occurring at the intense…

Plasma Physics · Physics 2020-10-28 L. P. Csernai , M. Csete , I. N. Mishustin , A. Motornenko , I. Papp , L. M. Satarov , H. Stöcker , N. Kroo

Ignition of Jet-A/air mixtures was studied behind reflected shock waves. Heating of shock tube at temperature of 150 C was used to prepare a homogeneous fuel mixture. Ignition delay times were measured from OH emission at 309 nm and from…

Chemical Physics · Physics 2014-03-18 V. P. Zhukov , V. A. Sechenov , A. Yu. Starikovskiy