Conveners
1.1 Basic Phenomena III
- Peng Zhang (Michigan State University)
Electrical contact is an important issue to high power
microwave sources, pulsed power systems, field emitters,
thin film devices and integrated circuits, and interconnects,
etc. Contact resistance, and the enhanced ohmic heating that
results, have been treated mostly under steady state (DC)
condition. In this paper, we consider the AC contact
resistance for a simple geometry [1], namely, that...
When two conductors are separated by sufficiently thin insulating layer, electrical current can flow between them by quantum tunneling. Tunneling conductivity is important to nanoscale electrical contacts, plasmonic resonators, carbon nanotube, graphene, and other novel two-dimensional (2D) material based devices. Tunneling effects between electrodes separated by thin insulating films have...
Multipactor breakdown occurs in vacuum when RF fields cause a growth of electrons as primary electrons impact various surfaces to generate multiple secondary electrons. On dielectric surfaces, this can lead to charge build up as electron-holes accumulate. This charge accumulation affects the field structure near the dielectric surface, which may then alter or suppress a nascent multipactor...
There are a number of advanced techniques which can be used in addition to the standard suite of multipactor diagnostics to discern important information about a multipactor breakdown event. In this work some of these techniques are presented. First, a photomultiplier tube is used to measure photon emission from breakdown. The magnitude of the measured PMT events are correlated with other...
Classical theories of space-charge limited emission (SCLE) for coaxial cylindrical and concentric spherical diodes were first formulated by Langmuir and Blodgett (LB) [1,2]. Recent studies have improved upon the LB series expansion using analytical techniques [3,4]; however, they assume zero space-charge and cannot predict single-particle trajectories or solve for the shape of the potential...
Current-carrying ion acoustic instability is one of the most fundamental phenomena in plasma physics. The electron stream relative to the ion stream undergoes an electrostatic instability, e.g. Buneman instability. In the presence of thermal effects, the ion Landau damping occurs, which sets a minimum threshold for the drift velocity for the instability to grow. In this talk, a grid-based...
Plasmas are conventionally generated by manipulating electric and magnetic fields[1]. A bio-inspired mechanical device mimicking snapping shrimp snapper claw based on micro X-ray computed tomography (μ-CT) scanning was designed to explore the possibility of producing plasma mechanically[2]. The major parts of the bio-inspired device including dactyl plunger and a matching socket with...