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|    rec.arts.sf.science    |    Real and speculative aspects of SF scien    |    45,986 messages    |
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|    Message 45,568 of 45,986    |
|    Faustian Cantrip to els.d...@gmail.com    |
|    Re: Theoretical Limit for Q in Fusion Re    |
|    03 Aug 18 07:19:05    |
      From: collinbrahana@gmail.com              On Tuesday, July 31, 2018 at 3:40:46 PM UTC-7, els.d...@gmail.com wrote:       > On Tuesday, July 31, 2018 at 11:08:29 AM UTC-5, David Ellis wrote:       > > It just dawned on me, though, that I think your point is that the surface       area vs volume question is the key. Is that correct? That the larger your       reactor is (and thus, the larger your ball of plasma is) the more energy you       have "trapped" in the        plasma to increase total fusion power       >        > There you go. Now you are getting it.        >        > > I imagine this isn't entirely true in the case of direct energy       conversion, where the reactor isn't relying solely on radiated power, and is       instead using magnetic fields to tap off the kinetic energy of charged       particles zipping around the torus.       >        > You don't take away the kinetic energy of charged particles that are still       zipping around the torus. You divert some percent of them to a different path       in which you can then attempt your direct conversion.              Would this work for inertial confinement? Off the top of my head, I would       think IC would be limited to single pulses, but I am not up to date on this.               --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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