Scientific Results using AppleSeed

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Instabilities in Fusion 
energy devices
16 Quantum Particles in a 
Infinite Well 
Laser wakefield 
particle accelerator


       The simulation of the Ion Temperature Gradient Instability in a Tokamak, a fusion energy device.  The turbulence in the nonlinear phase determines the confinement of plasma and heat in these devices.  A typical calculation takes 90 hours on four G3/266 Macintoshes.  Simulation was done by Richard Sydora.  For further details, click here.
Ion Temperature Gradient-Driven Instability in a Tokamak Plasma: 4-Node Mac-G3 Cluster

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        The simulation of Sixteen Dynamically Interacting Quantum Mechanical Particles in a Box.  These particles exhibit behavior common in the microscopic world.  One time step, containing over 40 million classical pushes and other calculations, takes five minutes on two G3/266 Macintoshes.  For more information, see Dean Dauger's Research Page.
16 Quantum Particles in a 1-D Infinite Well
Computed using a Quantum Particle-In-Cell code on a Power Mac G3 cluster

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        Using the Code WAKE, we have simulated the acceleration of an electron bunch by a relativistic wave in a plasma.  This wave is created behind an intense laser pulse propagating through a tenuous plasma, just as a wake is created behind a motor boat.  The electric fields created in such devices are much larger than in conventional accelerators.  If successful, a plasma-based accelerator could lead to a more compact linear accelerator, useful for high energy physics research, medicine, and tunable radiation sources.  This simulation models a 138 TeraWatt, 120 femtosecond laser pulse propagating down a plasma channel.  The laser's intensity, the electron plasma density and the energy of an injected electron bunch are shown initially and after 20 cm of accleration, respectively.  The red group in the bottom right diagram shows the highest energy particles (> 1.5 GeV).  This work was done by L. O. Silva, F. S. Wang, B. J. Duda, and W. B. Mori, T. Antonsen, Jr. and P. Mora.  For further information on plasma-based accelerators, click here.
A1 GeV laser wakefield stage

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