学术报告第178期—论文投稿报告

时间：2022年9月21日 周三  14:30

线下：326-2会议室

线上：腾讯会议 636-668-700

入会链接：https://meeting.tencent.com/dm/dfP0UBBpNZ3n

报告人：饶波 副教授

拟投期刊：Plasma Science and Technology （校庆专刊）

题目：Construction Progress of the HUST Field Reversed Configuration Device

摘要：A large field reversed configuration (FRC) research device named as HFRC has been constructed in Huazhong University of Science and Technology. On HFRC, a large improvement of the plasma temperature and density is expected by performing magnetic compression. In addition, fundamental plasma physics of formation and collision-merging of FRCs will be studied. The main machine, power supply and control system of HFRC have been successfully assembled and are now under test. Based on collision-merging method, HFRC has two field reversed theta pinch sections, a merging compression section, and two ending sections, and the total length reaches 15m. The design and test progress will be given in this paper.

报告人：张锦钰 研究生（东华理工大学）

负责导师：赵开君 教授

拟投期刊：Nuclear Fusion

题目：Turbulence propagation and its effects on the edge flows and turbulence during sawtooth cycles in the J-TEXT tokamak plasmas

摘要：The turbulence propagation and its effects on the edge flows and turbulence during sawtooth cycles are presented. These experiments were performed by Langmuir probe arrays and electron cyclotron emission radiometers in the J-TEXT tokamak plasmas. This study aims to understand the rapid transport phenomenon and the role of turbulence in driving flows. Beyond the mixing radius, the turbulence pulse moves faster than the sawtooth heat pulses. The result confirms the existence of turbulence propagation during sawtooth cycles. As the turbulence and heat pulses propagate to the edge, the edge turbulence, radial electric fields, pressures, and geodesic acoustic modes are all enhanced. The hysteresis relationships between intensities of the turbulence and the radial electric fields are observed. The radial electric field lags behind the turbulence and its intensity increases/decreases nearly linearly with the increase/decrease of the turbulence intensity. The observation suggests that the edge flows are driven dominantly by turbulence during sawtooth cycles. The weakness/enhancement of the edge flows accompanies the increase/decrease in the ion-ion collision rates during sawtooth cycles.