Saturday, January 5, 2013

The LDX - yes, a levitating dipole

The LDX - Levitating dipole experiment.

It sounds pretty crazy: a levitating wire of current as a fusion reactor! It turns out not to be only a MIT's grad-student thesis project: its simplistic set-up might prove an elegant solution.

I reviewed a book (Friedberg- Plasma physics and Fusion Energy)trying to understand it and it is pretty simple:

  • Get a wire into the shape of a cube
  • Put it inside a huge spherical vaccum chamber 
  • Get some nicely shaped B fields on top and bottom of chamber to levitate your loop of wire
  • Get some gas going (D or He3 that is... methane fusion has pretty small CS)
  • Heat your plasma with microwaves

Their major problems ahead are that they have to use D-D or D-He3 reactions because they have to keep their nice and superconducting loop of wire cool to run large enough currents to ever achieve decent fusion conditions.

It's a cool experiment nonetheless in the light that nobody has built any experiment that big (5-m diameter in MIT) a loop of wire and levitated it to fully study astrophysical plasmas like that before.

I hope transport is not a mess.
It also 

Saturday, December 8, 2012

An Overview

Hey,

In this particular post I will create a quick list of all the ideas 'to-review' in the near future.  This post would be updated as new ideas are discovered in the web.


HOT-Fusion

Magnetic Confinement
  • Tokamaks
    • ITER, JET, etc... 
  • Stellarators
    • TJ-II, Weldstein 7X, etc..
  • Cross-fire
    • Brasilian dude, not much serious coverage in the media, I wonder why? http://www.crossfirefusion.com/nuclear-fusion-reactor/crossfire-fusion-reactor.html 
  • Tri-alpha energy 
  • General Fusion - Canada
  • Ignitor - Italy/Russia

Electrostatic Confinement
  •  Polywell (Robert Bussard)
    • There are a few amateurs pushing this forward
    • Energy-Matter conversion corporation also
  •  Fusors
    •  Why don't they work?
    • http://www.fusor.net/
    • http://www.thestate.com/2012/06/10/2309526/17-year-old-physics-star-making.html#.UMPjj9FJyBs
    •  
       
Dynamic-Plasmoid ? Inertial Confinement

  • Plasma focus: http://lawrencevilleplasmaphysics.com/
    • They 'benefit' from instabilities to ignite their plasma
    • They slow down their alphas to get energy.


COLD-Fusion

I will not focus on this regime of fusion since I am no chemist. I will try, nonetheless, to deepen major newcasts.

  • Oh man, more people risking their careers down the drain:
  • http://phys.org/news/2011-01-italian-scientists-cold-fusion-video.html

An intro

Hello there,

The present blog has a simple goal:  to serve as a hub of simplified reviews on nuclear fusion proposals.  I am currently studying a masters in nuclear fusion within the European EMFusion consortium, and thus find all the fusion ideas posted in the internet very intriging.


This 'database' would include at least a simplified analysis of any idea posted.  I will try to the best of my ability and time-resources to describe the fusion ideas in more detail than the average 'news cast'.  The lack of depth in media fusion-reviews is the 'raison-de-etre' of this blog.  Also, I would like my 15 year-old sister to understand it!

I would finally like to add that the reviews are my personal opinion. I shall try to observe projects from a 'Saganian' perspective (if I might coin the term); however, I am an engineer by training and thus will question the feasibility of ideas beyond the fact that they are 'cool'.

Cheers,