Pros and Cons of Fusion Power Generation

[mheslep]

Sorry to bump again, but people might find this comment from Nebel interesting:...

link? linky-link-link please? Or which paper?

 

[TallDave]

Sorry, it doesn't let me post links :(

It was just a comment he made at Talk Polywell. Let's see if I can trick the anti-spam program:

www talk-polywell org/bb/viewtopic.php?t=468&postdays=0&postorder=asc&highlight=62500&start=30

 

[Astronuc]

The Helically Symmetric eXperiment

Something that has been overlooked.

HSX is a modular coil stellarator optimized for quasi-helically symmetry located in the Electrical and Computer Engineering department at the University of Wisconsin. Plasma physics research goals include investigation of transport, turbulence, and confinement in a quasi-helically symmetric magnetic field.

http://www.hsx.wisc.edu/

http://www.hsx.wisc.edu/parameters.shtml

Coil Current (maximum): 13.4 kiloAmperes
Magnetic Field Strength (maximum): 1.37 Tesla
Power Density: 0.23 W/cubic centimeter (with Heating Power (ECRH): 100 kiloWatts)

 

[TallDave]

Oh duh, now that I read the above I realize the power density is the ion density squared (i.e. 250 ^ 2 = 62500).

More from Nebel here. He also has a discussion in the comments with a tokamakker named Art Carlson who is known for throwing cold water on non-tokamak fusion schemes.

http://cosmiclog.msnbc.msn.com/archive/2008/06/12/1136887.aspx?p=1

 

[mheslep]

Oh duh, now that I read the above I realize the power density is the ion density squared (i.e. 250 ^ 2 = 62500).

is _related to_ the ion density.

Power density = Ion density x the fusion cross section for that ion species (D-T being highest), and fusion cross section being dependent on ion temperature.

 

[TallDave]

Ya, I assume squaring it was the rough estimate Nebel was using there.

 

[DavesPlanet]

Yes there's a picture of the latest device up on the EMC2 website w/ some joker locked inside it.

dude was not locked inside, it's the reflection of the photographer in the glass portal.