|fusion_fission_paper.pdf||2006-03-22 11:41:17||Friedwar Winterberg|
Thinking in Different Ways to Combine Fusion with Fission
Author: Friedwar M. Winterberg
Submitted: 2005-12-14 11:31:33
University of Nevada Reno
1664 N. Virginia St.
Reno, Nevada 89557-0
The common goal of CTR, but in particular ICF, is a low yield with a high gain. Fission triggered large thermonuclear explosive devices meet the second, but not the first of these two conditions. Such devices depend on the rare isotopes U235, Pu239, or U233, but for them the fusion output greatly exceeds the fission output, limiting the "fallout". Thinking in different ways to combine fusion with fission, three questions come up: 1.Are there ways where both conditions can be met, and where the "fallout" from fission is small? 2.Can the conditions be met without U235, Pu239, or U233, but with U238, or Th232, and perhaps with the fission of light nuclei, in particular B10, the latter having no "fallout"? 3.Are there concepts for magnetic fusion combining fusion with fission without U235, Pu239 or U233? In my talk I will present reasons why under the above stated conditions two things seem to be possible: 1. The greatly facilitated fast ignition of thermonuclear micro-explosions with a comparatively small amount of U238 or Th232. 2.The greatly enhanced pulsed magnetic fusion burn by the fission of U238, Th232, or of light nuclei in combination with a neutron moderator. In either one of these cases the burn is "autocatalytic" in the sense that nuclear reactions by fusion neutrons in a halo surrounding the fusion plasma drive in the halo thermomagnetic currents which compress the fusion plasma, increasing the thermonuclear reaction and neutron production rate, which in turn will amplify the thermomagnetic currents.