Conveners
Theory and Simulation 2 - Plasma: part 1
- Yinon Ashkenazy (The Hebrew University of Jerusalem (IL))
Theory and Simulation 2 - Plasma: part 2
- Flyura Djurabekova (University of Helsinki)
Matthew Hopkins
(Sandia National Laboratories)
06/11/2013, 11:00
Christopher H. Moore, Matthew M. Hopkins, Jeremiah J. Boerner, Paul S. Crozier, Stan G. Moore
The study of arc discharge often begins with Paschen’s analysis of breakdown processes under a number of assumptions. These assumptions are usually not valid in practice. We investigate changes to breakdown voltage when violating the assumption of uniform background gas.
Stefan Anton Parviainen
(Helsinki Institute of Physics (HIP))
06/11/2013, 11:30
I will talk about how the sputtering yield of Cu is increased in the presence of an electric field. The sputtering yield is important from the point of view of the plasma formation, and we need to be able to explain where all the neutral atoms are coming from that are needed for the plasma. The sputtering yield is used as an input parameter for e.g.
the PIC simulations, so it's good to...
Michael Keidar
(George Washington University)
07/11/2013, 09:00
We will present the state of the art modeling approach to describe the plasma (primarily interelectrode) of the vacuum arc. The model is based on the free boundary plasma expansion. The character of the plasma expansion depends on the anode geometries (disk anode, ring anode, and small anode relatively to the expanding plasma). Peculiarities of the high-current vacuum arc will be discussed....
Kyrre Ness Sjobaek
(University of Oslo (NO))
07/11/2013, 09:30
A full arc cycle (ignition-growth-steady-state-extinction) is simulated using the particle-in-cell (PIC) code ArcPic2D.
The model features electrons, singly charged ions, and neutrals which are tracked in a rotational symmetric geometry with 2 position components and 3 velocity components between two parallel plates.
Modelled interactions are long range electrostatic fields (PIC), coulomb...
Dmitry Shmelev
(Institute of Electrophysics RAS)
07/11/2013, 10:00
A 1D PIC/DSMC model was developed to simulate the near-cathode layer of plasma with the parameters typical for plasma of vacuum arc cathode spot. The model takes into account the main types of inelastic and elastic collisions (including the coulomb one) of particles in the plasma as well as evaporation and thermo-field electron emission from the cathode.
A wide range of characteristics of the...
Matthew Hopkins
(Sandia National Laboratories)
07/11/2013, 11:30
Matthew M. Hopkins, Jeremiah J. Boerner, Christopher H. Moore, Paul S. Crozier, Stan G. Moore, Matthew T. Bettencourt, Russell Hooper
The spatial, temporal, and model capability demands for simulating vacuum arc discharges are enormous. The simulation must evolve from an initial collisionless vacuum (or near vacuum) state through a sputtering phase with surface interaction and low...
