US tokamak research Page: 11 of 13
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teries of eokan.a>: era:ispore renai r. ’loresc 1 ved. The aoparer.e ior. hear eor-
duocivicy is compatible with neoclassical theory, but since the ior. heat con-
duction channel as a relatively minor feature of the energy balance, one can-
not exclude an anomalous enhancement up to a factor of approximately 5 ir.
the hi chess-tempera cure cases* The effect cf trapped-tarticle modes ir. ?L7
is clearly less severe than hac been anticipated on the basis of some sim-
piifisd quasi-lir.ear transport models, but the onset of important anomalous-
diffusion losses at ccllisionalities somewhat below those .of the FIT repine
cannot be ruled out — and is even rather probable* Fortunec~ly the decree
ox co 11 isior.iessr.ess required ir. a conventional tokamak. ignition reactor
need not go beyond that already achieved in PL7, but "hct-icr. igr.it,or."
senemas, for example, will enter an entirely new regime.
.is regards the electron thermal conductivity, further studies tr. Ph”
have confirmed the original impression '12] that confinement ir. the central
high-temperature plasma region actually improves during neutral-beam driver,
electron-tempera tur-- excursions. From these observe tiers, ore co ui d draw
tine simp 1 emir.dec conclusion that scales up proportionately with Ta,
but a r.umber cf ether interpretations are equally reason.able. For example,
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Furth, H.P. US tokamak research, article, October 1, 1979; New Jersey. (https://digital.library.unt.edu/ark:/67531/metadc1098234/m1/11/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.