Electron Current Drive by Fusion-Product-Excited.......
Posted: Mon Jan 10, 2011 5:56 pm
To distract everyone from the boredoom of the last couple of days here is a good argument of discussion:
Via Physorg:
http://www.physorg.com/news/2011-01-pow ... lasma.html
And the related Arxiv article.
http://arxiv.org/abs/1009.1041
Via Physorg:
http://www.physorg.com/news/2011-01-pow ... lasma.html
Researchers at the University of Warwick’s Centre for Fusion Space and Astrophysics and the UK Atomic Energy Authority’s Culham Centre for Fusion Energy may have found a way to channel the flux and fury of a nuclear fusion plasma into a means to help sustain the electric current needed to contain that very same fusion plasma.
And the related Arxiv article.
http://arxiv.org/abs/1009.1041
Happy reading.We present first principles simulations of the direct collisionless coupling of the free energy of fusion-born ions into electron current in a magnetically confined fusion plasma. These simulations demonstrate, for the first time, a key building block of some "alpha channelling" scenarios for tokamak experiments. A fully self-consistent electromagnetic 1D3V particle-in-cell code is used to evolve a parallel drifting ring-beam distribution of 3MeV protons in a 10keV thermal deuterium-electron plasma with realistic mass ratio. Collective instability gives rise to electromagnetic field activity in the lower hybrid range of frequencies. These spontaneously excited obliquely propagating waves undergo Landau damping on resonant electrons, drawing out an asymmetric tail in the distribution of electron parallel velocities, which carries a current.