Gyrotron development for high-power, long-pulse electron cyclotron heating and current drive at two frequencies in JT-60SA and its extension toward operation at three frequencies

2015 ◽  
Vol 55 (6) ◽  
pp. 063008 ◽  
Author(s):  
T. Kobayashi ◽  
S. Moriyama K. Yokokura ◽  
M. Sawahata ◽  
M. Terakado ◽  
S. Hiranai ◽  
...  
Keyword(s):  
High Power ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Pulse Electron ◽  
Electron Cyclotron Heating ◽  
Long Pulse

Development of high-power, long-pulse, multi-frequency ECH/CD system for JT-60SA

2021 ◽  
Author(s):  
Takayuki Kobayashi ◽  
Hibiki Yamazaki ◽  
Shinichi Hiranai ◽  
Masayuki Sawahata ◽  
Masayuki Terakado ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Stable Operation ◽  
Electron Cyclotron Heating ◽  
Dummy Load ◽  
Mode Purity ◽  
Long Pulse

Abstract A gyrotron and a matching optics unit (MOU) for the multi-frequency electron cyclotron heating and current drive (ECH/CD) system in JT-60SA have been developed successfully. The gyrotron demonstrated stable operation at high powers of 1.5 MW for 5 s and 1.9 MW for 1 s at 110 GHz. To obtain high HE11 mode purity (> 90%) at the outlet of the waveguide in the ECH/CD launcher, a MOU for operating at three frequencies of 82 GHz, 110 GHz, and 138 GHz that includes three pairs of water-cooled phase correcting mirrors has been developed, which allows the mirrors to be changed without opening the evacuated MOU. The mode purity at the inlet of a dummy load in the transmission line was evaluated at high-power and an HE11 mode purity of > 90% was obtained at three frequencies.

scholarly journals Recent Results from the Development of the Electron Cyclotron Heating System for JT-60SA toward High-Power Long-Pulse Operations

2012 ◽  
Vol 7 (0) ◽  
pp. 2405029-2405029 ◽  
Author(s):  
Akihiko ISAYAMA ◽  
Takayuki KOBAYASHI ◽  
Kenji YOKOKURA ◽  
Mitsuru SHIMONO ◽  
Masauki SAWAHATA ◽  
...  
Keyword(s):  
High Power ◽  
Heating System ◽  
Electron Cyclotron ◽  
Electron Cyclotron Heating ◽  
Long Pulse

scholarly journals High-power gyrotrons for electron cyclotron heating and current drive

2019 ◽  
Vol 59 (7) ◽  
pp. 073001 ◽  
Author(s):  
M.K.A. Thumm ◽  
G.G. Denisov ◽  
K. Sakamoto ◽  
M.Q. Tran
Keyword(s):  
High Power ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Electron Cyclotron Heating

Long-Pulse Improved Central Electron Confinement in the TCV Tokamak with Electron Cyclotron Heating and Current Drive

2001 ◽  
Vol 86 (8) ◽  
pp. 1530-1533 ◽  
Author(s):  
Z. A. Pietrzyk ◽  
C. Angioni ◽  
R. Behn ◽  
S. Coda ◽  
T. P. Goodman ◽  
...  
Keyword(s):  
Electron Cyclotron ◽  
Current Drive ◽  
Electron Cyclotron Heating ◽  
Electron Confinement ◽  
Long Pulse

High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system

2011 ◽  
Vol 82 (6) ◽  
pp. 063506 ◽  
Author(s):  
K. Takahashi ◽  
K. Kajiwara ◽  
Y. Oda ◽  
A. Kasugai ◽  
N. Kobayashi ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
High Power ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Drive System ◽  
Electron Cyclotron Heating ◽  
Wave Experiment

High power experiments of remote steering launcher for electron cyclotron heating and current drive

2003 ◽  
Vol 65 (4) ◽  
pp. 589-598 ◽  
Author(s):  
K Takahashi ◽  
C.P Moeller ◽  
K Sakamoto ◽  
K Hayashi ◽  
T Imai
Keyword(s):  
High Power ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Electron Cyclotron Heating

Progress in the ITER electron cyclotron heating and current drive system design

2015 ◽  
Vol 96-97 ◽  
pp. 547-552 ◽  
Author(s):  
Toshimichi Omori ◽  
Ferran Albajar ◽  
Tullio Bonicelli ◽  
Giuseppe Carannante ◽  
Mario Cavinato ◽  
...  
Keyword(s):  
System Design ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Drive System ◽  
Electron Cyclotron Heating
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