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November 9–12, 2025
Washington, DC|Washington Hilton
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Latest News
NRC’s hybrid AI workshop coming up
The Nuclear Regulatory Commission will host a hybrid public workshop on September 24 from 9 a.m.-5 p.m. Eastern time to discuss its activities for the safe and secure use of artificial intelligence in NRC-regulated activities.
Mikirou Yoshinuma, Akira Ando, Noriyoshi Sato, Masaaki Inutake, Toshiro Kaneko, Kunihiko Hattori, Rikizo Hatakeyama
Fusion Science and Technology | Volume 39 | Number 1 | January 2001 | Pages 191-194
Topical Lectures | doi.org/10.13182/FST01-A11963439
Articles are hosted by Taylor and Francis Online.
Radial potential profiles are precisely controlled to vary both radial electric field Er and its shear by using a 10-segmented endplate in an ECR-produced plasma. Observed frequencies and intensities of flute-mode and drift-mode fluctuations depend on the potential profile. The frequencies are Doppler shifted by E × B drift. The flute-mode fluctuation is identified as Kelvin-Helmholtz type instability which is destabilized by strong E × B flow shear. The drift-mode fluctuation is destabilized in the region of small and negative electric field. When the E × B rotation frequency shear is increased with Er being fixed, the drift-mode fluctuations increase once in a weaker shear region, attain its peak at a certain shear and then decrease in the strong shear region. This behavior suggests that the rotation frequency shear of net ion drift which is determined from both E × B drift and diamagnetic drift is important for stabilizing the drift mode.
