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The Alcator C-Mod mirror Langmuir probe system has been used to sample data time series of fluctuating plasma parameters in the outboard mid-plane far scrape-off layer. We present a statistical analysis of one second long time series of…

We present measurements of the cooling length $\ell_E$ for hot electrons in a GaAs-based high mobility two-dimensional electron gas (2DEG). The thermal measurements are performed on a long 60 $\mu$m-wide channel, which is Joule-heated at…

Mesoscale and Nanoscale Physics · Physics 2026-01-21 A. K. Jain , J. T. Nicholls , S. N. Holmes , G. Jaliel , C. Chen , I. Farrer , D. A. Ritchie

We study the onset of electron heating in intense laser-solid interactions and its impact on the spectral quality of radiation pressure accelerated ions in both hole boring and light sail regimes. Two- and three-dimensional particle-in-cell…

Plasma Physics · Physics 2022-11-01 H. -G. Jason Chou , Anna Grassi , Siegfried H. Glenzer , Frederico Fiuza

We perform numerical studies in QCD kinetic theory to investigate the energy and angular profiles of a high energy parton - as a proxy for a jet produced heavy ion collisions - passing through a Quark-Gluon Plasma (QGP). We find that the…

High Energy Physics - Phenomenology · Physics 2023-05-16 Y. Mehtar-Tani , S. Schlichting , I. Soudi

Context. The transition from left-hand to right-hand polarized Alfv\'en waves depends on the wavenumber, the ratio of kinetic to magnetic pressure $\beta$, temperature anisotropy, and ion composition of the plasma. Along with the…

Recent work has raised considerable interest on the nature of thin metallic wires. We have investigated the melting behavior of thin cylindrical Pb wires with the axis along a (110) direction, using molecular dynamics and a well-tested…

Condensed Matter · Physics 2015-06-25 O. Gulseren , F. Ercolessi , E. Tosatti

Recently our group analyzed how the probability distribution for the jet opening angle is modified in an ensemble of jets that has propagated through an expanding cooling droplet of plasma [1]. Each jet in the ensemble is represented…

Nuclear Theory · Physics 2018-03-14 Jasmine Brewer , Krishna Rajagopal , Andrey Sadofyev , Wilke van der Schee

A thin dark thread is observed in a UV/EUV solar jet in the 171A, 193A and 211A and partially in 304A. The dark thread appears to originate in the chromosphere but its temperature does not appear to lie within the passbands of the…

Solar and Stellar Astrophysics · Physics 2015-05-30 R. J. Morton , G. Verth , J. A. McLaughlin , R. Erdélyi

We conduct particle-in-cell simulations to estimate the effects of circularly and linearly polarized SEL 100 PW lasers on flat Th targets with thicknesses of 50 nm, 100 nm and 250 nm, as well as easy to manufacture conical Th targets with…

During the standard ac lock-in measurement of the resistance of a two-dimensional electron gas (2DEG) applying an ac current $I = \sqrt{2} I_0 \sin(\omega t)$, the electron temperature $T_e$ oscillates with the angular frequency $2 \omega$…

Mesoscale and Nanoscale Physics · Physics 2022-09-14 Akira Endo , Shingo Katsumoto , Yasuhiro Iye

A new method for measuring the electron temperature of the plasma in GOL-NB facility is proposed. The proposed method is based on measuring the ratio of intensities of spectral lines emitted by fast atoms injected into the plasma. The beams…

Plasma Physics · Physics 2023-07-31 S. Polosatkin

The effect of geometrical confinement, atomic position and orientation of Silicon nanowires (SiNWs) on their thermal properties are investigated using the phonon dispersion obtained using a Modified Valence Force Field (MVFF) model. The…

Mesoscale and Nanoscale Physics · Physics 2015-05-30 Abhijeet Paul , Mathieu Luisier , Gerhard Klimeck

We report on the plasma properties of small-scale transient events identified in the quiet Sun, coronal holes and their boundaries. We use spectroscopic co-observations from SUMER/SoHO and EIS/Hinode combined with high cadence imaging data…

Solar and Stellar Astrophysics · Physics 2015-06-05 M. S. Madjarska , Z. Huang , J. G. Doyle , S. Subramanian

Measurements of the drift velocities of electrons and holes as functions of electric field and temperature in high-purity n- and p-type silicon with <100> crystal orientation are presented. The measurements cover electric field values…

Instrumentation and Detectors · Physics 2015-12-09 C. Scharf , R. Klanner

The electron temperature is a crucial parameter for the determination of the gas-phase metallicity of galaxies. Low electron temperature is expected for metal-rich galaxies, theoretically. We report the discovery that temperature, as…

Astrophysics of Galaxies · Physics 2026-03-06 Ziming Peng , Renbin Yan , Zesen Lin , Xihan Ji , Man-Yin Leo Lee , Yuguang Chen

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 method for measurement of transverse profile (emittance) of the bunch by detecting of radiation arising scattering at of the bunch on the scanning wire is wide-spread. In this work the information about scattering bunch is proposed to…

Accelerator Physics · Physics 2009-10-31 S. G. Arutunian , N. M. Dobrovolski , M. R. Mailian , I. G. Sinenko , I. E. Vasiniuk

Comparison of appropriate theoretical derived line ratios with observational data can yield estimates of a plasma's physical parameters, such as electron density or temperature. The usual practice in the calculation of the line ratio is the…

Solar and Stellar Astrophysics · Physics 2014-11-20 J. G. Doyle , S. Chapman , P. Bryans , D. Perez-Suarez , A. Singh , H. Summers , D. W. Savin

We predict that superconducting particles will show an apparent increase in thickness at low temperatures when measured by electron holography. This will result not from a real thickness increase, rather from an increase in the mean inner…

Superconductivity · Physics 2013-06-18 J. E. Hirsch

A hydrophobic constriction site can act as an efficient barrier to ion and water permeation if its diameter is less than the diameter of an ion's first hydration shell. This hydrophobic gating mechanism is thought to operate in a number of…

Subcellular Processes · Quantitative Biology 2007-05-23 Oliver Beckstein , Mark S. P. Sansom