fusion power

 Tokamak:

 

No current device has been able to generate more fusion power than the heating energy required to start the reaction. Scientists measure this assessment with a value known as fusion gain (expressed as the symbol Q), which is the ratio of fusion power to the input power required to maintain the reaction. Q = 1 represents the breakeven point, but because of heat losses, burning plasmas are not reached until about Q = 5. Current tokamaks have achieved around Q = 0.6 with DT reactions. Fusion power plants will need to achieve Q values well above 10 to be economic.

ITER:

 

timeline

ITER > DEMO > PROTO > mass scale fusion energy. by 2060

Feb 2022

In UK, JET’s latest experiment sustained a Q of 0.33 for 5 seconds. JET is a scaled-down version of ITER, at one-tenth of the volume 

12 apr 2023

全超導托卡馬克核聚變實驗裝置（EAST）, HT-7U, 周三（12日）晚上創造了新的世界紀錄，成功實現穩態高約束模式等離子體steady state h mode 運行403秒。wiki

STEP

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