ire event: shot 030703.39

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IRE Event: shot 030703.39 2003/9/10

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IRE Event: shot 030703.39. 2003/9/10. Characters of Internal reconnection event ( IRE ) in experiment. 等离子体中心压强迅速下降,时间尺度 100-200 微秒( thermal quench ); 热能迅速从芯部向边界输运,电流分布边平; ( 然而 )IRE 事件并没有大的破坏性,观察到 resilience 属性; 随着热淬灭的发生,等离子体电流有约 10% 的增加。 IRE 事件的发生伴随低 m 和 n 模; 等离子体截面拉长(垂直方向)。. - PowerPoint PPT Presentation

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Page 1: IRE Event: shot 030703.39

IRE Event: shot 030703.39

2003/9/10

Page 2: IRE Event: shot 030703.39

Characters of Internal reconnection event ( IRE ) in experiment

• 等离子体中心压强迅速下降,时间尺度 100-200 微秒( thermal quench );

• 热能迅速从芯部向边界输运,电流分布边平;• ( 然而 )IRE 事件并没有大的破坏性,观察到 res

ilience 属性;• 随着热淬灭的发生,等离子体电流有约 10% 的

增加。• IRE 事件的发生伴随低 m 和 n 模;• 等离子体截面拉长(垂直方向)。

Page 3: IRE Event: shot 030703.39

IRE Event of Shot 030703.39

6.0 6.2 6.4 6.6 6.8 7.0 7.2 7.4 7.6 7.8 8.0-10

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Page 4: IRE Event: shot 030703.39

Noise before OH initiation

Page 5: IRE Event: shot 030703.39

Breakdown delay phase

Page 6: IRE Event: shot 030703.39

Multi-resolution analysis of wavelet (1001-1200points)

Page 7: IRE Event: shot 030703.39

Lock mode from multi-resolution analysis of wavelet ?

Page 8: IRE Event: shot 030703.39

Fast Fourier Analysis: Energy of high frequency

Page 9: IRE Event: shot 030703.39

Disruption caused by locked mode ?

• Shot 030703.39 放电,从磁测量信号观察到了 IRE现象?破裂发生在 6.9 ms 附近。此次放电等离子体的 dIp/dt 约为 26MA/s 。

• 从傅立叶频谱分析看,信号的能量主要集中在高频部分 >45 kHz, 在 10k Hz 附近也沉积了部分能量 ;从小波分析看,处于高频段 >40 kHZ 的锁摸现象很明显,是锁模导致了等离子体的破裂,但是由于 ST 位形的约束性能而出现了等离子体电流的回弹。 ---IRE---

• 030109 的实验数据没有类似的破裂现象发生• 锁摸和 IRE 产生的机理和条件?

Page 10: IRE Event: shot 030703.39

Shot 030703.40: locked mode without disruption ?

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Page 11: IRE Event: shot 030703.39

High frequency (d1) locked mode ?

Page 12: IRE Event: shot 030703.39

Multi-resolution analysis of wavelet: No locked mode ?

Page 13: IRE Event: shot 030703.39

Compared with shot 030703.39high energy of about 10 kHz

Page 14: IRE Event: shot 030703.39

Shot 030703.41 : Without locked mode

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Page 15: IRE Event: shot 030703.39

Shot 030703.41

Page 16: IRE Event: shot 030703.39

Shot 030703.38: Disruption

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