We present a fullyimplicit electromagnetic particleincell monte carlo collision code, called ninja, written for the simulation of inductively coupled plasmas. Using multiple benchmarks and performance measurements on the us oak ridge national laboratory titan. For plasmas, charged particles interact self consistently via the electromagnetic fields they themselves produce. A fluid particleincell pic model is proposed for the numerical solution of the continuity equation of electrons and ions in transient electrical gas discharges.
High performance solvers for implicit particle in cell. For symmetric species, such as a pair plasma, the trapped particle distribution is essentially equal. His research focuses on the particleincell simulation algorithm for the relativistic plasma drift, lorentz boosted frame simulation technique, and physics of plasmabased accelerator. Part of the lecture notes in physics book series lnp, volume 615. A particleincell simulation with monte carlo collisions was developed to study ion extraction from a capacitivelycoupled argon plasma through a grid. Marx generator connected to peaking capacitor and peaking switch can generate ultrawideband uwb radiation. I wrote a paper on dbd discharges particle in cell simulations of initial argon.
Computational cycle for particle in cell simulations sm lund, uspas, 2016 selfconsistent simulations 3 numerical solution of particle and distribution methods a. Numerical solution of particle and distribution methods. Two examples illustrate the application of the particleincell method in beam dynamics and plasma physics. Their space coordinates are continuous and they can occupy position anywhere within the mesh. Particleincell simulation of rfq in ssc internet archive. In this method, individual particles in a lagrangian frame are tracked in continuous phase space, whereas moments of the distribution such as densities and currents are computed simultaneously on eulerian mesh points.
But avoid asking for help, clarification, or responding to other answers. This book introduces the techniques needed to produce realistic simulations and animations of particle and rigidbody systems. Vlasov and particleincell simulations chapter highpower. This is used to calculate diffusion coefficients using the einstein equation. Home browse by title theses study of the critical ionization velocity effect by particle in cell simulation study of the critical ionization velocity effect by particle in cell simulation january 1992.
Particle in cell consulting llc is a small californiabased business providing services to the electric propulsion, space environment, and contamination control communities. The reactions occurring in a gaseous discharge, such as ionization of neutral molecules, electron attachment. A new peaking switch is designed for converting the. In addition, we cover topics related to particle sampling and variable specific weight. The particleincell method refers to a technique used to solve a certain class of partial differential equations. I will expose some problems we encounter when we simulate a large number of. The following is a very brief history of particleincell simulation techniques developed at the space plasma and plasma processing lab sp3 at the australian national university, where i did my phd. I am integrating particles by boris scheme, grid is simply constructed as cellijk, with dimensions of k x l x m and the distribution process is a little bit tricky, but not very hard after all. The particleincell computing method for fluid dynamics, in methods in computational physics, vol. Particleincell simulations of the nearfield of a lower hybrid grill. The basement and resent development of the particleincell method are presented. A fullyimplicit particleincell monte carlo collision. This example brings together the field classes of the preceding tutorials with this tutorials particles class.
Particleincell simulation of plasmas a tutorial springerlink. Study of the critical ionization velocity effect by. Lorentz boosted frame simulation technique in particlein. The advent of distributed computing platforms holds the promise of performing these simulations at greater resolution in a shorter amount of time. The international journal of high performance computing applications 33. Particle in cell simulation of peaking switch for breakdown evaluation abstract. Particlebased simulation of plasmas book chapter iopscience. A discrete element method dem, also called a distinct element method, is any of a family of numerical methods for computing the motion and effect of a large number of small particles. The stopping power also depends on the e ective particle shape of the macroparticle. The presence of positive and negative plasma species mitigates the ejection of particles that occurs due to space charge repulsion. A particle in cell pic simulation 4 is a numerical method to resolve states for particles, magnetic and electric. The method gained popularity for plasma simulation in the late 1950s and early 1960s by. Physics free fulltext particleincell simulation of. These conclusions are veri ed in particleincell simulations.
A molecular dynamics simulation of liquid argon in a periodic simulation cell where the particle positions are not wrapped to be placed in the opposing face of the cell when they cross the boundary. Particleincell code for plasma simulation opensource, userfriendly and designed for high performances on supercomputers, it is applied to a wide range of physics studies. Particlein cell pic and vlasov simulations both solve the vlasov. The following is a very brief history of particleincell simulation techniques developed at the space plasma and plasma processing lab sp3 at the australian national university, where i. Particleincell kinetic simulation software center picksc. A fully kinetic plasma simulation based upon the particleincell and monte carlo collision methodologies was developed to model axisymmetric closeddrift hall effect thruster discharges. This chapter describes the particleincell algorithm. Pic methods were already in use as early as 1955, even before the first fortran compilers were available. The simulation cell is reproduced throughout the space to form an infinite mesh.
Particle modeling modeling and simulation in science, engineering and technology softcover reprint of the original 1st ed. Particleincell pic simulation is a standard simulation technique used to solve a variety of problems in science and industry, particularly problems in plasma physics. The particles that we follow are in the central cell. Particleincell simulation of ion beam extraction from a. Particleincell simulation of electrical gas discharges. Interesting perspectives on the history and philosophy behind pic for plasma simulation can be found in. Particleincell pic is a technique commonly used to simulate motion of charged particles. Thanks for contributing an answer to physics stack exchange. It is housed within the ucla departments of physics and astronomy and of electrical engineering, and institute for digital research and education idre.
Particle in cell simulation of plasma thrusters ieee. I am able to do the steps 1, 2 and 4, but not the poisson part. B transport, plasma flow past a charged sphere, and a simple ion gun. The ringing instability in particleincell calculations of lowspeed flow. Computer simulation has reached a stage where it can be a highly useful tool for guiding theory and for making predictions of space plasma phenomena, ranging from. Enhanced stopping of macroparticles in particleincell. We can simulate the properties of an infinite system. Particle modeling modeling and simulation in science. The affine particleincell method acm transactions on. Principles of particle in cell simulations semantic scholar. This course introduces the particle in cell method used for kinetic plasma simulations using a stepbystep approach.
Nearest grid point, cloud in cell, area, splines e. We will develop 1d, 3d, and 2d axisymmetric codes to simulate plasma sheath, e. Simulation results were used to derive the waveform and magnitude of the spurious electric fields. During the simulation, particles are free to move in the central original cell. When the particle shape is a bspline of order zero a case called cloudincell, the particle is subdivided to the cells according to its overlap. Numerical simulation analysis of flow patterns and particle transport in the head laser ablation cell with respect to inductively coupled plasma spectrometry h. A threedimensional implicit particleincell ipic3d method implemented by s. The alfven critical ionization velocity civ mechanism for the anomalously rapid ionization of a neutral cloud moving across a magnetized plasma at a supercritical velocity was proposed originally to explain the formation of the early solar system. In this seminar i will introduce the basics for computer particle plasma simulation.
The first step to decide how to model a system of interacting particles is to distinguish between weakly and. Ninja employs a kinetic enslaved jacobianfree newton krylov method to solve selfconsistently the interaction between the electromagnetic field generated by the radiofrequency coil. The ucla particleincell pic and kinetic simulation software center picksc was created through an nsf software infrastructure for sustained innovation si2 award. Sp3 has had a long history of involvement with computer modelling of plasma. The particleincell pic method refers to a technique used to solve a certain class of partial differential equations. Realtime simulation of large bodies of water with small scale. The particleincell pic method was used to study various plasma thruster concepts. The simulation captures two dimensions in space and three in velocity. The particleincell pic method refers to a technique used to solve a certain class of partial. With avx particle system can simulate 2,000,000 particles on my i7 3770k source code and compiled demo available at github. Numerical simulation analysis of flow patterns and. Computational cycle for particle in cell simulations.
A onedimensional simulation of the plasma reactor was coupled with a twodimensional simulation of. Local charge density is simply number of particles in individual cell and divided by volume of the same cell. This advanced plasma simulation course is a follow up to pic fundamentals. The method gained popularity for plasma simulation in the lat. Stationary plasma thruster spt, high effic particle in cell simulation of plasma thrusters. Our third and final example of this important class is a particleincell program, which simulates the motion of charged particles in a static sinusoidal electrical field in two dimensions. In this method, individual particles or fluid elements in a lagrangian frame are tracked in continuous phase space, whereas moments of the distribution such as densities and currents are computed simultaneously on eulerian stationary mesh points. The text focuses on both the theoretical and practical aspects of developing and implementing physically based dynamicsimulation engines. Keywords plasma heating, microwaves, lower hybrid grill, lower hybrid waves, particleincell simulation, parasitic absorption, wave coupling, thermonuclear devices. Can anyone suggest to me about the simulation of plasma by pic.
The particleincell pic technique has a rich history and its use in plasma physics continues to grow. Molecular simulationdiffusion coefficients wikibooks. Can you give me some suggestions about the pic method or some books. This means any particle that crosses one boundary of the cell, will reappear on the opposite side. Opensource, userfriendly and designed for high performances on supercomputers, it is applied to a wide range of physics studies. Beam dynamics study in rfq was done using 3dimensional particleincell code beampath 1. Concept and limitations mark eric dieckmann why and when. Radiofrequency rf charged particle traps, such as the paul trap or higher order rf multipole traps, may be used to trap quasineutral plasma. When the particle shape is a bspline of order zero a case called cloudin cell, the particle is subdivided to the cells according to its overlap. I will expose some problems we encounter when we simulate a large number of particles and how we can proceed. Though dem is very closely related to molecular dynamics, the method is generally distinguished by its inclusion of rotational degreesoffreedom as well as stateful contact and often. Simulation results show that this rfq structure is characterized by stable value of beam transmission efficiency at least 95% for both zerocurrent mode and for space charge dominated regime. If you want to learn more about those, i dont feel like i can give this subject justice better than chapter 11 of birdsall and langdons seminal plasma physics via computer simulation text. Guide to dynamic simulations of rigid bodies and particle.
530 1268 1250 549 135 1121 244 1541 66 415 816 754 1377 675 270 1196 1045 1539 570 1411 399 190 1246 1011 740 695 970 1072 1142 1234 107 1428 56 144