Abstract
Confinement improvement over normal ohmic level has been achieved in HT-6M tokamak by current ramp up at the rate of 12 Ma/s. After the current ramp up, the H{sub {alpha}} drops and electron temperature becomes peak profile. The plasma current increases about 10% and edge plasma density increases quite a lot (more than 50%) after the ramp up and then becomes peaking later on. Radiation loss is reduced and its profile becomes broad. Corresponding to different density range, the MHD behaviour changes from strong m = 3 and m 2 Mirnov oscillations to weak ones, Mirnov oscillation to sawtooth oscillation and small quick sawtooth to large slow ones. The energy confinement time increases about 1.6 to 1.9 times and particle confinement time increases about a factor of four. The detail current penetration process is analysed and compared to classical diffusion process. All of these phenomena is very similar to the L-H transition.
Yuedong, Meng;
Jiangang, Li;
Xiang, Gao
[1]
- Academia Sinica, Hefei, AH (China). Inst. of Plasma Physics
Citation Formats
Yuedong, Meng, Jiangang, Li, and Xiang, Gao.
Preliminary experiment results of EOH in HT-6M tokamak.
China: N. p.,
1994.
Web.
Yuedong, Meng, Jiangang, Li, & Xiang, Gao.
Preliminary experiment results of EOH in HT-6M tokamak.
China.
Yuedong, Meng, Jiangang, Li, and Xiang, Gao.
1994.
"Preliminary experiment results of EOH in HT-6M tokamak."
China.
@misc{etde_61043,
title = {Preliminary experiment results of EOH in HT-6M tokamak}
author = {Yuedong, Meng, Jiangang, Li, and Xiang, Gao}
abstractNote = {Confinement improvement over normal ohmic level has been achieved in HT-6M tokamak by current ramp up at the rate of 12 Ma/s. After the current ramp up, the H{sub {alpha}} drops and electron temperature becomes peak profile. The plasma current increases about 10% and edge plasma density increases quite a lot (more than 50%) after the ramp up and then becomes peaking later on. Radiation loss is reduced and its profile becomes broad. Corresponding to different density range, the MHD behaviour changes from strong m = 3 and m 2 Mirnov oscillations to weak ones, Mirnov oscillation to sawtooth oscillation and small quick sawtooth to large slow ones. The energy confinement time increases about 1.6 to 1.9 times and particle confinement time increases about a factor of four. The detail current penetration process is analysed and compared to classical diffusion process. All of these phenomena is very similar to the L-H transition.}
place = {China}
year = {1994}
month = {Apr}
}
title = {Preliminary experiment results of EOH in HT-6M tokamak}
author = {Yuedong, Meng, Jiangang, Li, and Xiang, Gao}
abstractNote = {Confinement improvement over normal ohmic level has been achieved in HT-6M tokamak by current ramp up at the rate of 12 Ma/s. After the current ramp up, the H{sub {alpha}} drops and electron temperature becomes peak profile. The plasma current increases about 10% and edge plasma density increases quite a lot (more than 50%) after the ramp up and then becomes peaking later on. Radiation loss is reduced and its profile becomes broad. Corresponding to different density range, the MHD behaviour changes from strong m = 3 and m 2 Mirnov oscillations to weak ones, Mirnov oscillation to sawtooth oscillation and small quick sawtooth to large slow ones. The energy confinement time increases about 1.6 to 1.9 times and particle confinement time increases about a factor of four. The detail current penetration process is analysed and compared to classical diffusion process. All of these phenomena is very similar to the L-H transition.}
place = {China}
year = {1994}
month = {Apr}
}