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An optically thin $p$-$^{11}$B plasma loses more energy to bremsstrahlung than it gains from fusion reactions, unless the ion temperature can be elevated above the electron temperature. In thermal plasmas, the temperature differences…

等离子体物理 · 物理学 2015-12-09 Michael J. Hay , Nathaniel J. Fisch

The analysis of Balmer-dominated optical spectra from non-radiative (adiabatic) SNRs has shown that the ratio of the electron to proton temperature temperature at the blast wave is close to unity at v_s <= 400 km/s, but declines sharply…

天体物理学 · 物理学 2009-11-11 Parviz Ghavamian , J. Martin Laming , Cara E. Rakowski

We investigate the acceleration of charged particles (both electrons and protons) at collisionless shocks predicted to exist in the vicinity of solar flares. The existence of standing termination shocks has been examined by flare models and…

高能天体物理现象 · 物理学 2015-06-04 Fan Guo , Joe Giacalone

We investigate the electrical conductivity (sigma) of quark matter via the Kubo formula at finite temperature and zero quark density (T>0, mu=0) in the presence of an external strong magnetic field. For this purpose, we employ the dilute…

高能物理 - 唯象学 · 物理学 2015-06-05 Seung-il Nam

This paper overviews experimental and numerical results on acceleration of narrow energy spread ion beams by an electrostatic collisionless shockwave driven by 1 um (Omega EP) and 10 um (UCLA Neptune Laboratory) lasers in near critical…

等离子体物理 · 物理学 2020-08-26 S. Tochitsky , A. Pak , F. Fiuza , D. Haberberger , N. Lemos , A. Link , D. H. Froula , C. Joshi

Collisionless shocks heat electrons in the solar wind, interstellar blast waves, and hot gas permeating galaxy clusters. How much shock heating goes to electrons instead of ions, and what plasma physics controls electron heating? We…

空间物理 · 物理学 2021-01-01 Aaron Tran , Lorenzo Sironi

We demonstrate through high-fidelity particle-in-cell simulations a simple approach for efficiently generating 20+ GeV electron beams with the necessary charge, energy spread, and emittance for use as the injector for an electron arm of a…

加速器物理 · 物理学 2024-06-10 Thamine N. Dalichaouch , Xinlu L. Xu , Fei Li , Frank S. Tsung , Warren B. Mori

We present extensive new \emph{ab initio} path integral Monte Carlo (PIMC) simulations of the uniform electron gas (UEG) in the high-temperature regime, $8\leq\theta=k_\textnormal{B}T/E_\textnormal{F}\leq128$. This allows us to study the…

等离子体物理 · 物理学 2022-11-23 Tobias Dornheim , Jan Vorberger , Zhandos Moldabekov , Gerd Röpke , Wolf-Dietrich Kraeft

Suprathermal fusion reactions, initiated by energetic particles slowing down and scattering in dense plasmas, can modify the burn dynamics at inertial confinement fusion (ICF) regimes. A 0D time-dependent Monte-Carlo code has been developed…

等离子体物理 · 物理学 2026-04-09 Marcus Borscz , Thomas A. Mehlhorn , Patrick A. Burr , Igor Morozov , Sergey Pikuz

We carry out highly accurate \emph{ab initio} path integral Monte Carlo (PIMC) simulations to directly estimate the free energy of various warm dense matter systems including the uniform electron gas and hydrogen without any nodal…

量子气体 · 物理学 2024-07-02 Tobias Dornheim , Zhandos Moldabekov , Sebastian Schwalbe , Jan Vorberger

Femtosecond electron bunches with keV energies and eV energy spread are needed by condensed matter physicists to resolve state transitions in carbon nanotubes, molecular structures, organic salts, and charge density wave materials. These…

The evolution of a dilute electron-positron fireball is calculated in the regime of strong magnetization and very high compactness (l ~10^3-10^8). Heating is applied at a low effective temperature (< 25 keV), and the fireball is allowed to…

高能天体物理现象 · 物理学 2015-06-17 Christopher Thompson , Ramandeep Gill

We analyse the effects of applying an electric field on the critical temperature, Ts, at which superionicity appears in archetypal fast ion conductor CaF2 by means of molecular dynamics simulations. We find that the onset of superionicity…

材料科学 · 物理学 2015-08-31 Claudio Cazorla

An experimental investigation on laser plasma acceleration of electrons has been carried out using 3 TW, 45 fs duration titanium sapphire laser pulse interaction with nitrogen gas jet at intensity of 2x10^18 W/cm^2. We have observed stable…

等离子体物理 · 物理学 2018-06-25 B. S. Rao , A. Moorti , J. A. Chakera , P. A. Naik , P. D. Gupta

The motivation for PF calorimetry is to experimentally measure the energy of hadron jets with excellent resolution. In particle flow designs, sigma(E)/E < 5% should be possible for a range of jet energies from 50 GeV to 250 GeV, important…

仪器与探测器 · 物理学 2022-07-20 Randal Ruchti , Katja Kruger

We use large hybrid (kinetic protons-fluid electrons) simulations to investigate the transport of energetic particles in self-consistent electromagnetic configurations of collisionless shocks. In previous papers of this series, we showed…

高能天体物理现象 · 物理学 2015-06-22 Damiano Caprioli , Anatoly Spitkovsky

We propose an efficient mechanism to heat a plasma by an intense microwave field solving the equation of ion motion in a wave field and a constant magnetic field in a large coupling regime. The mechanism does not relies explicitly on…

等离子体物理 · 物理学 2007-05-23 Marco Frasca

This paper presents a new chemical kinetic model developed for the simulation of auto-ignition and combustion of engine surrogate fuel mixtures sensitized by the presence of NOx. The chemical mechanism is based on the PRF auto-ignition…

化学物理 · 物理学 2009-03-26 Jörg Anderlohr , A. Pires Da Cruz , Roda Bounaceur , Frédérique Battin-Leclerc

An integrated simulation approach fully based upon particle-in-cell (PIC) model is proposed, which involves both fast particle generation via laser solid-density plasma interaction and transport and energy deposition of the particles in…

等离子体物理 · 物理学 2015-01-12 W. -M. Wang , P. Gibbon , Z. -M. Sheng , Y. -T. Li

Two-dimensional simulations of ion beam driven fast ignition are presented. Ignition energies of protons with Maxwellian spectrum and carbon ions with quasimonoenergetic and Maxwellian energy distributions are evaluated. The effect of the…

等离子体物理 · 物理学 2009-10-08 J. J. Honrubia , J. C. Fernandez , M. Temporal , B. M. Hegelich , J. Meyer-ter-Vehn