Internal transport barrier triggered by non-linear lower hybrid wave deposition under condition of beam-driven toroidal rotation

2015 ◽  
Vol 22 (3) ◽  
pp. 032507 ◽  
Author(s):  
Q. D. Gao ◽  
R. V. Budny
Keyword(s):  
Lower Hybrid ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
Transport Barrier ◽  
Toroidal Rotation ◽  
Non Linear ◽  
Internal Transport Barrier ◽  
Internal Transport

Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)

2002 ◽  
Vol 9 (5) ◽  
pp. 2156-2164 ◽  
Author(s):  
J. Mailloux ◽  
B. Alper ◽  
Y. Baranov ◽  
A. Becoulet ◽  
A. Cardinali ◽  
...  
Keyword(s):  
Current Drive ◽  
Lower Hybrid ◽  
Transport Barrier ◽  
Lower Hybrid Current Drive ◽  
Internal Transport Barrier ◽  
Internal Transport

Improved confinement through internal transport barrier formation with lower hybrid current drive in the Hefei Tokamak-7

2002 ◽  
Vol 9 (12) ◽  
pp. 4996-5000 ◽  
Author(s):  
Bojiang Ding ◽  
Guangli Kuang ◽  
Yuexiu Liu ◽  
Jiafang Shan ◽  
Weici Shen ◽  
...  
Keyword(s):  
Current Drive ◽  
Lower Hybrid ◽  
Transport Barrier ◽  
Barrier Formation ◽  
Lower Hybrid Current Drive ◽  
Internal Transport Barrier ◽  
Internal Transport

Heat transport analysis of the improved confinement discharge with LHW in the HT-7 tokamak

2009 ◽  
Vol 76 (2) ◽  
pp. 229-237 ◽  
Author(s):  
X. M. ZHANG ◽  
X. SHEN ◽  
B. N. WAN ◽  
Z. W. WU ◽  
J. FU ◽  
...  
Keyword(s):  
Heat Transport ◽  
Current Drive ◽  
Lower Hybrid ◽  
Ion Temperature ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
Transport Barriers ◽  
Internal Transport Barriers ◽  
Transport Analysis ◽  
Internal Transport

AbstractIn the HT-7 tokamak, heat transport analysis is carried out for the lower hybrid current drive (LHCD) experiments. Electrons and ions are coupled and good confinement can be obtained by properly optimizating LHCD and plasma parameters. Under the conditions that the plasma current is about 220 kA, the lower hybrid wave (LHW) power is about 300 kW and the central line-averaged density is about 1.5×1013 cm−3, lower hybrid wave power deposition is off-axis. Local transport analysis illustrated that both electron and ion thermal diffusivities are decreased during the LHW phase, and the electron internal transport barriers (eITBs) are formed while been accompanied by the ion internal transport barriers (iITBs) during LHW phase. Ions are heated by electron-ion collision in the region of the barriers although the ohmic power and the LHW power were absorbed by the electrons. Both electron temperature and ion temperature are increased during the LHW phase, and in the confinement region, the electron-to-ion temperature ratio, Te/Ti varies from 2.0 ~ 2.5 during OH phase to 1.3 ~ 1.6 during LHW injected into the plasma, which shows that electron confinement is not degraded by the electron–ion collisions meanwhile ions are also confined. The energy confinement is increased from 13 ms to 25 ms due to the formation of electron and ion internal transport barries after the LHW is injected into the plasma. LHW driven current and bootstrap current contribute to 60% of the total current.

Generation of the kinetic alfven wave and lower hybrid wave in space plasma

2001 ◽  
Vol 7 (2s) ◽  
pp. 59-66
Author(s):  
A.K. Yukhimuk ◽  
◽  
V.N. Fedun ◽  
Yu. Voitenko ◽  
E.K. Sirenko ◽  
...  
Keyword(s):  
Space Plasma ◽  
Alfven Wave ◽  
Lower Hybrid ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
Kinetic Alfvén Wave ◽  
Kinetic Alfven Wave

X-ray Measurements during Plasma Current Start-up Experiments using the Lower Hybrid Wave on the TST-2 Spherical Tokamak

2012 ◽  
Vol 132 (7) ◽  
pp. 485-489 ◽  
Author(s):  
Takuma Wakatsuki ◽  
Akira Ejiri ◽  
Hidetoshi Kakuda ◽  
Yuichi Takase ◽  
Takanori Ambo ◽  
...  
Keyword(s):  
Lower Hybrid ◽  
Spherical Tokamak ◽  
Plasma Current ◽  
Hybrid Wave ◽  
Lower Hybrid Wave ◽  
X Ray ◽  
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