[ExI] Accelerator on a Chip: How It Works
johnkclark at gmail.com
Sun Sep 29 15:45:50 UTC 2013
On Sun, Sep 29, 2013 at 5:26 AM, Anders Sandberg <anders at aleph.se> wrote:
>> Original paper at http://arxiv.org/abs/1308.0464
> > So if one can accelerate electrons to 50 GeV in 100 feet, that means a
> one meter chip would presumably get you 500 MeV(linear increase in energy
> by length). The paper merely claims 25 MeV/m, but 25 MeV is still a pretty
> penetrating beam.
They make a rather interesting comment on that subject:
"After writing of the manuscript we became aware of a recently proposed
innovative scheme combining plasma based acceleration with the periodic
field reversal at grating structures, which may lead to scalable
accelerators with a sustained acceleration gradient up to TeV/m "
That paper is at:
And in that paper they say:
"In our simulations, we show that a sustained acceleration rate of 2.3
TeV/m is feasible with the plasma structures."
> I don't think this design lends itself to firing a lot of electrons
I would think you could have an array of accelerator channels spaced
exactly one wavelength apart in the vertical direction.
> as a particle beam weapon (efficiency of energy transfer from the laser
> into the electrons will still be low; you could just fire the laser at the
I agree, I don't think electron beams would make much of a weapon, but who
knows, weapon makers can be ingenious.
> but as they say, this is a good electron source for free-electron X-ray
And cheap practical X-ray lasers could have profound implications for
microchip manufacturing, and phase contrast X-ray imaging, and yes perhaps
John K Clark
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