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Natural Science Forum / Physics / Fusion / June 2005Electrons from Nano Tubes
Apparently Motorola can make a cheap thin screen HDTV out of lots of short nanotubes ejecting electrons. May 28 _Science News_. This is kind of a basic question but what is the great appeal of lasers over electron beams in fusion? Bret Cahill > Apparently Motorola can make a cheap thin screen HDTV out of lots of > short nanotubes ejecting electrons. May 28 _Science News_. [quoted text clipped - 3 lines] > > Bret Cahill ..........Beacause the term "La-ser" sounds cool? ...Let's all say it together with "air quotation marks" like Doctor Evil did...."La-ser". Maybe if we changed the spelling . . . Bret Cahill > Apparently Motorola can make a cheap thin screen HDTV out of lots of > short nanotubes ejecting electrons. May 28 _Science News_. [quoted text clipped - 3 lines] > > Bret Cahill Laser photons are not charged particles Using charged particles in fusion experiments creates a whole host of problems that must be addressed. Without charge, the things are simpler. Bob <> This is kind of a basic question but what is the great appeal of lasers <> over electron beams in fusion? < Laser photons are not charged particles That's the first thing everyone notices. < Using charged particles in fusion experiments creates a whole < host of problems that must be addressed. Just one problem might be persuasive: A charged particle has one more force to overcome if the electrons ever need to get close together w/o any protons around. < Without charge, the things are simpler. Has ANYONE since Einstein valued elegance? Bret Cahill < Laser photons are not charged particles Using charged < particles in fusion experiments creates a whole host of < problems that must be addressed. Another problem is they don't go far except in a vacuum. Bret Cahill And photons don't go very far or very fast in a plasma. Fusion fuel is composed of neutral atoms; in implosion initiation the fueli is raised to the density necessary by ablative heating of the outer layers of the pellet (just as in a fusion bomb.) The charge of an electron isn't the deciding factor of how to compress the fuel; flux intensity, and for net gain in energy, cost of the flux are. Phil Weldon >< Laser photons are not charged particles Using charged > [quoted text clipped - 5 lines] > > Bret Cahill A large enough vacuum chamber might be able to accomodate enough electron guns to rival a lot of lasers. I don't know the efficiency or power density or discharge times of lasers v electron beams. I doubt the energy required for a vacuum is significant. If cold fusionists can use electrons moving through water why not use a whole lot of electrons moving through a vacuum? Bret Cahill |
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