Observation of Edge Reynolds Stress Increase Preceding an L-H Transition in Compact Helical System

Yoshihiko NAGASHIMA; Kenichi NAGAOKA; Kimitaka ITOH; Akihide FUJISAWA; Mitsutaka ISOBE; Tsuyoshi AKIYAMA; Chihiro SUZUKI; Shin NISHIMURA; Yasuo YOSHIMURA; Keisuke MATSUOKA; Shoichi OKAMURA; Yuichi TAKASE; Akira EJIRI; Sanae -I. ITOH; Masatoshi YAGI; CHS Group

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Observation of Edge Reynolds Stress Increase Preceding an L-H Transition in Compact Helical System

机译：紧凑型螺旋系统中从L-H转变之前边缘雷诺应力增加的观察

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An increase in turbulent Reynolds stress preceding an L-H transition in the Compact Helical System (CHS) was observed. A positive increase in the Reynolds stress is associated with a negative jump in the floating potential. The relationship of signs is consistent with the momentum balance equation. Therefore, this observation supports the hypothesis that the Reynolds stress plays an important role in triggering the L-H transition in CHS plasmas.

机译：在紧凑型螺旋系统（CHS）中，在L-H转变之前，湍流雷诺应力有所增加。雷诺应力的正增加与浮动电位的负跳变相关。符号的关系与动量平衡方程一致。因此，该观察结果支持了雷诺应力在触发CHS血浆中L-H转变中起重要作用的假设。

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《Plasma and Fusion Research》 |2010年第10期|共1页
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Yoshihiko NAGASHIMA; Kenichi NAGAOKA; Kimitaka ITOH; Akihide FUJISAWA; Mitsutaka ISOBE; Tsuyoshi AKIYAMA; Chihiro SUZUKI; Shin NISHIMURA; Yasuo YOSHIMURA; Keisuke MATSUOKA; Shoichi OKAMURA; Yuichi TAKASE; Akira EJIRI; Sanae -I. ITOH; Masatoshi YAGI; CHS Group;
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2. Observation of radial phase shift of the edge harmonic oscillation in the edge transport barrier discharges in the Compact Helical System using beam emission spectroscopy [J] . Oishi T, Kado S, Yoshinuma M, Physics of plasmas . 2006,第10期

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8. Quiet Periods in Edge Turbulence Preceding the L-H Transition in NSTX [R] . 2010

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Observation of Edge Reynolds Stress Increase Preceding an L-H Transition in Compact Helical System

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