1. FIP/P1-8, T. Kobayashi et al
FIP/P1-8, T. Kobayashi et al., “Progress in Development and Fabrication of the JT-60SA ECH/CD System”
1. Cyclic test of a full scaled (~7m) mock up of launcher steering system
Linear motion
(40 cm)
Rotation
(+/-20°)
Bellows
Liner guide
(w/ lubricant)
(w/o lubricant)
Angular
bearing
Requirement
Failure
Improved
Achieved
Number of test cycles
100,000
10,000
1,000
Long-stroke bellows
Vertical bellows
Rigid shaft
Angular bearings
Linear guide
Required life time has been satisfied by an improvement with solid lubricant.
2. Measurement of transmission line temperature at high-power (0.5 MW/20 s)
MB5
MB6
MB7
MB4
MB3
MB2
MB1
Gyrotron
Dummy load
Measured temperature rise: 2 – 1.2 degree per 1 MJ injection.
1 MW/100 s injection required in JT-60SA is acceptable.
Cooling system design based on the experimental result was carried out.
3. The preparation of the JT-60SA ECH/CD system toward first plasma experiment is smoothly progressing by the above results and the successful gyrotron development.
IAEA FEC 2018