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Going Nuclear: Notes from the officially unofficial book tour
I work in the analytical labs at one of Europe’s oldest and largest nuclear sites: Sellafield, in northwestern England. I spend my days at the fume hood front, pipette in one hand and radiation probe in the other (and dosimeter pinned to my chest, of course). Outside the lab, I have a second job: I moonlight as a writer and public speaker. My new popular science book—Going Nuclear: How the Atom Will Save the World—came out last summer, and it feels like my life has been running at full power ever since.
H. Funaba, K. Y. Watanabe, S. Sakakibara, S. Murakami, I. Yamada, K. Narihara, K. Tanaka, T. Tokuzawa, M. Osakabe, Y. Narushima, M. Yokoyama, S. Ohdachi, Y. Takeiri, H. Yamada, K. Kawahata, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 141-149
Chapter 3. Confinement and Transport | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10801
Articles are hosted by Taylor and Francis Online.
The magnetic configuration of the Large Helical Device (LHD) changes with the increment in beta. To distinguish between the beta effect and the configuration effect on the gradual degradation of the global confinement property in the high-beta LHD plasmas, the local transport characteristics are studied by considering the change in the major radius of the magnetic flux surface with the beta value. A model transport coefficient that has the same nondimensional parameter dependence as the international stellarator scaling 2004 (ISS04) is introduced and used as the reference. The dependence of the local transport characteristics in high-beta plasmas on the major radial position of a geometric center of the magnetic flux surface is compared with that in low-beta plasmas. The dependence of the local transport in the peripheral region is correlated more with beta itself than the magnetic configuration effect, whereas the core transport appears to be correlated more with the configuration effect. The comparison of the experimental transport coefficients and the calculation results shows that the resistive pressure gradient-driven turbulence can be considered as one of the causes of this degradation.