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Nakamura, Hiroo; Tsuji, Shunji; Nagami, Masayuki
Japan Atomic Energy Research Inst., Tokyo (Japan)1989
Japan Atomic Energy Research Inst., Tokyo (Japan)1989
AbstractAbstract
[en] In JT-60, hydrogen H-mode experiments with outer and lower divertors were performed. In the outer divertor, H-mode were obtained, similar to the ones observed in the other lower/upper divertors. Its threshold absorbed power and electron density were 16 MW and 1.8 x 1019m-3. In the two combined heatings with NB+ICRF and NB+LHRF, H-mode discharges are also obtained. Moreover, in new configuration of lower divertor, H-mode phases without and with ELM are obtained. Typical results of the lower divertor are shown to compare the H-mode characteristics between the two configurations. Improvement of the energy confinement time in the two divertors was limited to 10 %. Analyses on ballooning/interchange instabilities were carried out with precise equlibria of JT-60. These results showed that the both modes were enough stable. (author)
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Aug 1989; 58 p
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