92 citations · 283 across the 9 of their papers we have counts for
9 papers
Atomic step disorder on polycrystalline surfaces leads to spatially inhomogeneous work functions
Morgann Berg, Sean W. Smith, David A. Scrymgeour +11
Structural disorder causes materials surface electronic properties, e.g. work function () to vary spatially, yet it is challenging to prove exact causal relationships to underly…
Simulations of ion heating due to ion-acoustic instabilities in the presheath
Lucas Beving, Matthew Hopkins, Scott Baalrud
Particle-in-cell direct simulation Monte Carlo simulations reveal that ion-acoustic instabilities excited in presheaths can cause significant ion heating. Ion-acoustic instabilitie…
A unified framework for X-shaped radio galaxies
David Garofalo, Ravi Joshi, Xiaolong Yang +3
We propose a radically different picture for X-shaped radio galaxies compared to existing models as transition objects between cold mode accreting low spinning retrograde black hol…
Interaction of Biased Electrodes and Plasmas: Sheaths, Double Layers and Fireballs
Scott D. Baalrud, Brett Scheiner, Benjamin Yee +2
Biased electrodes are common components of plasma sources and diagnostics. The plasma-electrode interaction is mediated by an intervening sheath structure that influences propertie…
Theory and simulation of anode spots in low pressure plasmas
Brett Scheiner, Edward Barnat, Scott Baalrud +2
When electrodes are biased above the plasma potential, electrons accelerated through the associated electron sheath can dramatically increase the ionization rate of neutrals near t…
Particle-in-cell study of the ion-to-electron sheath transition
Brett Scheiner, Scott D. Baalrud, Matthew M. Hopkins +2
The form of a sheath near a small electrode, with bias changing from below to above the plasma potential is studied using 2D particle-in-cell (PIC) simulations. Five cases are stud…
Theory of the Electron Sheath and Presheath
Brett Scheiner, Scott D. Baalrud, Benjamin T. Yee +2
Electron sheaths are commonly found near Langmuir probes collecting the electron saturation current. The common assumption is that the probe collects the random flux of electrons i…
Electron Preheaths: The Outsized Influence of Positive Boundaries on Plasmas
Benjamin T. Yee, Brett Scheiner, Scott D. Baalrud +2
Electron sheaths form near the surface of objects biased more positive than the plasma potential, such as in the electron saturation region of a Langmuir probe trace. Generally, th…
Extensions and Applications of the Bohm Criterion
Scott D. Baalrud, Brett Scheiner, Benjamin Yee +2
The generalized Bohm criterion is revisited in the context of incorporating kinetic effects of the electron and ion distribution functions into the theory. The underlying assumptio…