Results 81 to 90 of about 1,418,864 (329)

Ionization by bulk heating of electrons in capacitive radio frequency atmospheric pressure microplasmas

, 2013
Electron heating and ionization dynamics in capacitively coupled radio frequency (RF) atmospheric pressure microplasmas operated in helium are investigated by Particle in Cell simulations and semi-analytical modeling.
, A Derzsi, Babayan S E, Becker K H, D Eremin, Hemke T, J Meichsner, J Schulze, K Dittmann, Knake N, Kong M G, Kurihara M, Niemi K, Niermann B, Phelps A V, Pipa A V, Proshina O V, Reuter S, Reuter S, Schaper L, Schulze J, Schulze J, Schulze J, Schulze J, Schulze J, T Hemke, T Mussenbrock, Turner M M, Waskoenig J, Weltmann K D, Z Donkó   +30 more
core   +1 more source

Elinvar Materials: Recent Progress and Challenges

Advanced Engineering Materials, EarlyView.
Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley   +1 more source

Field dependence of impact ionization coefficients in In0.53Ga0.47As [PDF]

, 2003
Electron and hole ionization coefficients in In/sub 0.53/Ga/sub 0.47/As are deduced from mixed carrier avalanche photomultiplication measurements on a series of p-i-n diode layers, eliminating other effects that can lead to an increase in photocurrent ...
David, J.P.R., Hill, G., Ng, J.S., Rees, G.J., Tan, C.H.   +4 more
core   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

One-photon double ionization of helium: a heuristic formula for the cross section

, 2011
Without a formal derivation, we propose a formula for the total and single-differential cross in the problem of one-photon double ionization of an atom.
Førre, Morten
core   +1 more source

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Monte-Carlo approach to calculate the ionization of warm dense matter within particle-in-cell simulations

, 2016
A physical model based on a Monte-Carlo approach is proposed to calculate the ionization dynam- ics of warm dense matters (WDM) within particle-in-cell simulations, and where the impact (col- lision) ionization (CI), electron-ion recombination (RE) and ...
Fritzsche, S., He, X. T., Wu, D., Yu, W.
core   +2 more sources

Investigating the Cosmic-Ray Ionization Rate Near the Supernova Remnant IC 443 Through H3+ Observations [PDF]

, 2010
Observational and theoretical evidence suggests that high-energy Galactic cosmic rays are primarily accelerated by supernova remnants. If also true for low-energy cosmic rays, the ionization rate near a supernova remnant should be higher than in the ...
Abdo, Acciari, Albert, Benjamin J. McCall, Brian D. Fields, Burgh, Burton, Chevalier, Claussen, Cornett, Drury, Geballe, Geoffrey A. Blake, Goto, Hewitt, Hewitt, Hirschauer, Indriolo, Indriolo, Inoue, Lodders, Lord, Mattila, Miwa Goto, Neufeld, Nick Indriolo, Padoan, Rachford, Reville, Rho, Sheffer, Skilling, Snell, Sofia, Sonnentrucker, T. R. Geballe, Takeshi Oka, Tavani, Tomonori Usuda, Troja, van Dishoeck, Webber, White, White, Yusef-Zadeh, Zhang   +45 more
core   +2 more sources

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Development of an X-ray ionization beam position monitor for PAL-XFEL soft X-rays

Journal of Synchrotron Radiation
The Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL) operates hard X-ray and soft X-ray beamlines for conducting scientific experiments providing intense ultrashort X-ray pulses based on the self-amplified spontaneous emission (SASE ...
Seonghan Kim, SunMin Hwang, Hoyoung Jang, Seungcheol Lee, HyoJung Hyun   +4 more
doaj   +1 more source