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Figure 1 indicates by green colors the amplitude of the temperature variation due to the momentary heating inside and outside the magnetic island at the time slice indicated by red lines. The dashed lines indicate the timing when the confinement performance (adiabaticity) changes. When the confinement performance (adiabaticity) is bad (left : ? < 0), the temperature variations are invading into the inner part of the magnetic island. (The area inside the magnetic island becomes green.) When the confinement performance (adiabaticity) changes to a good state (right : ? > 0), the invasion of temperature variations into the inner part of the magnetic island is suppressed and there are no temperature variations inside the magnetic island. (The area inside the magnetic island remains white.).
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