Status report on mirror alternatives

Abstract

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Magnetic fusion energy annual report, July 1975--September 1976

“…In fact, MFTF (also FERF) appears to be an ideal size for a self-contained reac tor module based on the field-reversal concept. 30 The beam system would also be well matched to ex periments at higher 0, if indeed higher (3 yields higher nr. The greater beam power needed to fill a given volume to a higher value off) tends to be com pensated by the improved confinement Reference 30 summarizes the present status of these and other possible ways to improve mirror confinement.…”

“…Our evaluation of the other items in Table 6 was, as reported in Ref. 30, that they represented areas where other research groups were actively working and where any contributions we could make would arise naturally from work already in progress (such as the high-beta 2XUB results, which affect the possibility of ion bumpy torus reactors). The FRM offers the potential of a compact reactor of con venient unit power output, but many areas of physics pertaining to it remain to be explored.…”

Interaction of neutrons at high energies

“…If instabilities are surmountable, it appears very likely that intense ECH will be required to permit long ranging exponentiation or Lorentz trapping build-up in devices using only modest injection currents (~ 1 mA). The simple magnetic-mirror devices may not allow economic fusion power unless the ends are stoppered in some way [10][11][12] or unless one goes to the beam-driven fusion-fission option or the beam-driven, large circulating power pure fusion devices with or without direct conversion.…”

“…This straight line curve intersects the points (100, 10 15 ) and (1000, 3 X 10 17 ) on Fig.l and hence falls well below the ignition curve for any fuel. Thus, for an ignition plasma the magnetic mirror losses must be grossly reduced as in the ion-layer or proton E-layer [ 10] or other reversed-field mirror [ 11 ], or the mirror-connected bumpy torus [12]. At this time the fuel feed mechanisms and transport loss mechanisms are essentially unresolved for these potential reactor configurations.…”

Generation and Propagation of an Intense Rotating Proton Beam

“…1 " 5 Such configurations have been experimentally realized (i) by the injection of relativistic electron beams 6 to form a reversed-field electron ring, 7 (ii) by plasma currents induced by relativistic-electron-beam injection, 8 and (ill) by reversed-field 0 pinches. 9 However, synchrotron-radiation energy losses make a relativistic electron ring unsuitable for a fusion reactor.…”