时 间： 2016年05月03日（周二） 14:30

地 点： 三楼会议室313

报告人1： 高丽（HUST）

题 目1： Plasma transport behaviors during minor disruption with 2/1 locked mode on J-TEXT

摘要：

Minor disruptions caused by 2/1 mode locking are studied on J-TEXT tokamak with RMP set to 2/1 mode. The transport process of electrons is clearly observed by three-wave polar meter-interferometer system (POLARIS). The diffusion coefficient is determined using the standard time-to-peak analysis. The results indicate that a large increase in diffusion coefficient well in advance of the major disruption.

报告人2： 黄都伟（HUST）

题 目2： Suppression of runaway current generation by SMBI in disruption

摘要：

Runaway current generated in ITER disruption can lead to severe damage at plasma facing components. The generation and suppression of runaway electron (RE) have been investigated in J-TEXT tokamak. RE current was created with rapid argon injection by a massive gas injection (MGI) valve. Supersonic molecular beam injection (SMBI) as a highly efficient fueling method can provide a high beam velocity and deep penetration depth. A small amount of hydrogen injected by SMBI during the quiescent plasma current flattop can induce magnetic penetrations, and then cause plasma instability which increases RE loss rapidly. SMBI has been used to mitigate disruption generated RE current in the J-TEXT tokamak. It is found that hydrogen SMBI before disruption can suppress RE current generation efficiently, while injection at RE current plateau has not dissipate effect.

报告人3： 佟瑞海（HUST）

题 目3： Introduction of runaway electrons and the observation of runaway electron by infrared camera on J-TEXT

摘要：

When the energy of confined runaway electrons approaches several tens of MeV, the runaway electrons can emit the synchrotron radiation in the range of infrared wavelength. An infrared (IR) camera working in the wavelength of 4-5μm has been developed to study the runaway electrons in the J-TEXT tokamak. The camera is located in the equatorial plane looking tangentially into the direction of runaway electron approach, working in a frame rate of 1000fps with the exposure time 10μs. The pattern of the runaway beam inside the plasma is observed at the flattop phase. The behavior of runaway beam has been studied in different target plasmas. It is found that the application of resonant magnetic perturbations (RMP) and supersonic molecular beam injection (SMBI) can affect the transport of runaway electrons by enhancing the internal magnetic perturbation. The behavior of runaway current has been observed directly by the IR camera during the runaway electron plateau in the massive gas injection triggered disruptions.

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