Results 41 to 50 of about 4,253 (208)

Role of Radio Frequency and Microwaves in Magnetic Fusion Plasma Research [PDF]

, 2017
The role of electromagnetic (EM) waves in magnetic fusion plasma—ranging from radio frequency (RF) to microwaves—has been extremely important, and understanding of EM wave propagation and related technology in this field has ...
Hawryluk, Hutchinson, Stix
core   +2 more sources

Commissioning of 170 GHz, 1 MW EC H&CD in KSTAR

EPJ Web of Conferences, 2012
The newly installed electron cyclotron heating and current drive (EC H&CD) system with a frequency of 170 GHz was successfully commissioned and used for the second-harmonic ECH-assisted startup in 2011 operational campaign of the KSTAR.
Oda Y., Kajiwara K., Cho M.H., Park H., Namkung W., Kwon M., Kwak J. G., Yang H. L., Bae Y. S., Kim J. S., Han W. S., Kim H. J., Park S. I., Joung M., Sakamoto K., Jeong J. H., Hosea J., Ellis R., Doane J., Olstad R.   +19 more
doaj   +1 more source

On hybrid scenarios in KSTAR

Nuclear Fusion, 2020
We report the status of hybrid scenario experiments in Korea Superconducting Tokamak Advanced Research (KSTAR). The hybrid scenario is defined as stationary discharges with B N >= 2.4 and H_89 >= 2.0 at q_95 < 6.5 without or with very mild sawtooth activities in KSTAR. It is being developed towards reactor-relevant conditions.
Na, Y.S., Lee, Y.H., Byun, C.S., Kim, S.K., Lee, C.Y., Park, M.S., Yang, S.M., Kim, B., Jeon, Y.M., Citrin, J., Choi, G.J., Juhn, J.W., Kang, J.S., Kim, H.S., Kim, J.H., Ko, W.H., Kwon, J.M., Lee, W.C., Woo, M.H., Yi, S., Yoon, S.W., Yun, G.S., Team, KSTAR   +22 more
openaire   +3 more sources

Study of Synergetic Effect of X2 and X3 EC Wave in KSTAR

EPJ Web of Conferences, 2015
An experimental study of the X-mode absorption at the second and the third harmonic frequencies has been performed in KSTAR tokamak. The X2 EC frequency is 110 GHz and the X3 EC frequency is 170 GHz at the nominal KSTAR operating toroidal magnetic field.
Bae Y.S., Decker J., Jeong J.H., Lee K.D.   +3 more
doaj   +1 more source

Measurement of fast ion life time using neutron diagnostics and its application to the fast ion instability at ELM suppressed KSTAR plasma by RMP

Nuclear Engineering and Technology, 2019
The confinement degradation of the energetic particles during RMP would be a key issue in success of realizing the successful energy production using fusion plasma, because a 3.5 MeV energetic alpha particle should be able to sustain the burning plasma ...
Jong-Gu Kwak, M.H. Woo, T. Rhee
doaj   +1 more source

Study of off-axis current drive using EC top-launch in KSTAR [PDF]

EPJ Web of Conferences, 2019
The off-axis current drive using electron cyclotron (EC) wave is typically very low due to the low density and temperature and electron trapping effect when it is launched from outside midplane.
Bae Young-soon
doaj   +1 more source

Dynamics of cold pulses induced by super-sonic molecular beam injection in the EAST tokamak

, 2018
Evolution of electron temperature, electron density and its fluctuation with high spatial and temporal resolutions are presented for the cold pulse propagation induced by super-sonic molecular beam injection (SMBI) in ohmic plasmas in the EAST tokamak ...
Cao, Bin, Liu, Ahdi, Liu, Xiang, Liu, Yong, Naulin, Volker, Shi, Yuejiang, Zhang, Shoubiao, Zhang, Tao, Zhao, Hailin, Zhou, Chu, Zhou, Tianfu, Zou, Xiaolan   +11 more
core   +1 more source

Toroidal mode number estimation of the edge-localized modes using the KSTAR 3-D electron cyclotron emission imaging system [PDF]

, 2014
A new and more accurate technique is presented for determining the toroidal mode number n of edge-localized modes (ELMs) using two independent electron cyclotron emission imaging (ECEI) systems in the Korea Superconducting Tokamak Advanced Research ...
Bak, J.G., Choi, M.J., Domier, C.W., Kim, M., Lee, J., Lee, J.E., Lee, S.G., Lee, W., Luhmann, N.C., Park, Hyeon Keo, Park, Y.S., Sabbagh, S.A., Yun, G.S.   +12 more
core   +1 more source

Predicting Rock Brittleness Using a Robust Evolutionary Programming Paradigm and Regression-Based Feature Selection Model

Applied Sciences, 2022
Brittleness plays an important role in assessing the stability of the surrounding rock mass in deep underground projects. To this end, the present study deals with developing a robust evolutionary programming paradigm known as linear genetic programming (
Mehdi Jamei, Ahmed Salih Mohammed, Iman Ahmadianfar, Mohanad Muayad Sabri Sabri, Masoud Karbasi, Mahdi Hasanipanah   +5 more
doaj   +1 more source

Demonstration of sawtooth period control with EC waves in KSTAR plasma

EPJ Web of Conferences, 2015
The sawtooth period control in tokamak is important issue in recent years because the sawtooth crash can trigger TM/NTM instabilities and drive plasmas unstable.
Jeong J. H., Bae Y. S., Joung M., Kim D., Goodman T. P., Sauter O., Sakamoto K., Kajiwara K., Oda Y., Kwak J. G., Namkung W., Cho M. H., Park H., Hosea J., Ellis R.   +14 more
doaj   +1 more source