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HT-7托卡马克上电子回旋辐射计及前端研究

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核电子学与探测技术 2009年第2期29卷 423-428页

作者：熊刚凌必利费勤山提昂李二众中国科学院等离子体物理研究所合肥230031

介绍了安装在HT-7托卡马克装置上的电子回旋辐射外差诊断系统的原理;设计了一套测量系统,测量了石英玻璃和TPX材料在微波波段的插入损耗,为系统设计提供了必要的数据;研究了等离子体物理实验过程中在石英玻璃上沉积的膜的微波传输特性;... 详细信息

介绍了安装在HT-7托卡马克装置上的电子回旋辐射外差诊断系统的原理;设计了一套测量系统,测量了石英玻璃和TPX材料在微波波段的插入损耗,为系统设计提供了必要的数据;研究了等离子体物理实验过程中在石英玻璃上沉积的膜的微波传输特性;测量了诊断系统的天线方向角,并分析了天线方向角给电子温度测量带来的影响。

关键词：电子回旋辐射毫米波插入损耗天线方向角

Analysis of diffusive coefficient of electron heat pulse based on singular value decomposition in HT-7 tokamak

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Chinese Physics B 2010年第3期19卷 374-378页

作者：李二众凌必利刘永提昂胡立群高翔 Institute of Plasma Physics Chinese Academy of Sciences

In this paper, singular value decomposition （SVD） as a filter-noise method is applied to electron cyclotron emission （ECE） diagnostic signals. The decomposed vectors contain the information about sawtooth such as the temporal vectors that show the sawtooth period and the spatial vectors that indicate the inverse radius. The propagation of electron heat pulse is investigated from electron cyclotron emission signals by using the perturbation method in HT-7 tokamak. The heat diffusivities are obtained at different densities in ohmic plasmas. The special result is that the heat diffusivity becomes larger as the heat pulse propagates outwards from the outside of the inverse radius.

关键词： electron cyclotron emission ohmic plasma heat diffusivity tokamak

用于EAST电子温度分布诊断的光栅多色仪系统

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用于EAST电子温度分布诊断的光栅多色仪系统

Measurement of Magnetic Island Width by Multi-Channel ECE Radiometer on HT-7 Tokamak

第十四届全国等离子体科学技术会议暨第五届中国电推进技术...

作者：刘永凌必利李二众中国科学院合肥物质科学研究院等离子体物理研究所

光栅多色仪系统是一种利用测量托卡马克等离子体电子回旋辐射强度来得到电子温度分布的诊断系统。托卡马克等离子体中,纵场与大半径成反比,而电子回旋辐射的频率只与磁感应强度有关。因此,沿着大半径方向,电子回旋辐射的频率与位置是一一对

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Plasma Science and Technology 2013年第3期15卷 217-220页

作者：韩翔凌必利高翔刘永提昂李二众徐立清王嵎民 Institute of Plasma Physics Chinese Academy of Sciences

A 16-channel electron cyclotron emission （ECE） radiometer has been employed to observe the （m, n） = （2, 1） magnetic island structure on HT-7 tokamak, where m and n represent the poloidal and toroidal mode number respectively. The results indicate that the island width is about 7 cm when the magnetic island is saturated during the m/n = 2/1 mode. The location of resonance surface can be determined by plotting the contour of ECE relative fluctuation. This method could be applied to the HT-7 and EAST campaigns in the future for the research of neoclassical tearing modes （NTMs）.

关键词： magnetic island width ECE fluctuation HT-7 tokamak

Present Status of the Electron Cyclotron Emission Measurements on HT-7 and EAST

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Plasma Science and Technology 2011年第3期13卷 352-356页

作者：刘永提昂韩翔王嵎民李二众凌必利胡立群高翔 Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

Present status of the diagnostics for electron cyclotron emission measurements on both HT-7 and EAST is reported. A 16-channel heterodyne radiometer system and a 20-channel grating polychromator, have been installed on HT-7 and EAST. A 32-channel heterodyne radiometer system, with a wider frequency coverage and better spatial resolution, is being built. In order to provide a reliable electron temperature profile, an in-situ absolute calibration system is currently being built. With the ECE measurements, study on the electron heat transport and the anomalous Doppler resonance is conducted.

关键词： electron cyclotron emission electron temperature profile heterodyne radiome-ter grating polychromator

m = 的鉴定复杂 magneto-hydro-dynamics 活动的 2 能干的模式在内部软混乱期间基于单个价值分解和断层摄影术软 -- HT-7 tokamak 上的 X 光检查排放

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Chinese Physics B 2012年第5期21卷 422-427页

作者：徐立清胡立群李二众陈开云刘志远陈晔斌张继宗周瑞杰杨茂毛松涛段艳敏 Institute of Plasma Physics Chinese Academy of Sciences

In this paper, the singular value decomposition (SVD) method as a filter is applied before the tomographic inversion of soft-X-ray emission. Series of 'filtered' signals including specific chronos and topos are obtained. (Here, chronos and topos are the decomposed spatial vectors and the decomposed temporal vectors, respectively). Given specific magnetic flux function with coupling m = 1 and m = 2 modes, the line-integrated soft-X-ray signals at all chords have been obtained. Then m = 1 and m = 2 modes have been identified by tomography of simulated 'filtered' signals extracted by the SVD method. Finaly, using the experimental line-integrated soft-X-ray signals, m = 2 competent mode of complex magnetohydrodynamics(MHD) activities during internal soft disruption is observed. This result demonstrates that m = 2 mode plays an important role in internal disruption (Here, m is the poloidal mode number).

关键词： singular value decomposition disruption soft-X-ray tomography tokamak

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HT-7装置电子回旋辐射系统接收天线改进

核聚变与等离子体物理 2010年第1期30卷 46-50页

作者：费勤山凌必利提昂刘永熊刚张莉丽李二众高翔中国科学院等离子体物理研究所合肥230031

为了提高HT-7装置上等离子体电子回旋辐射(ECE)超外差诊断系统的极向分辨率,根据高斯光学原理,分析了诊断系统天线的改进方案。优化了天线的圆形角锥喇叭尺寸和凸透镜参数以及在装置上的相对位置,使天线接收到的等离子体ECE异常模二次... 详细信息

为了提高HT-7装置上等离子体电子回旋辐射(ECE)超外差诊断系统的极向分辨率,根据高斯光学原理,分析了诊断系统天线的改进方案。优化了天线的圆形角锥喇叭尺寸和凸透镜参数以及在装置上的相对位置,使天线接收到的等离子体ECE异常模二次谐波辐射的高斯光束束半径只有30mm左右,能量的高斯光学性质损失不大于13%。

关键词：电子回旋辐射高斯光学天线系统异常模二次谐波

EAST托卡马克可见CCD诊断系统的实验研究

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EAST托卡马克可见CCD诊断系统的实验研究

Repetitive ＇Snakes＇ and Their Damping Effect on Core Toroidal Rotation in EAST Plasmas with Multiple H-L-H Transitions

第十四届全国等离子体科学技术会议暨第五届中国电推进技术...

作者：张莉丽凌必利提昂刘永熊刚李二众中国科学院等离子体物理研究所

在EAST托卡马克实验装置上研制了2套可见CCD(Charge Coupled Device)视频监测系统,主要用于观察放电过程中等离子体的位形、等离子体对内真空室器壁及内部部件的影响、偏滤器和限制器放电模式的辅助判断。该系统由两台CCD相机组成,分别...

在EAST托卡马克实验装置上研制了2套可见CCD(Charge Coupled Device)视频监测系统,主要用于观察放电过程中等离子体的位形、等离子体对内真空室器壁及内部部件的影响、偏滤器和限制器放电模式的辅助判断。该系统由两台CCD相机组成,分别安装在同一水平窗口的左右两侧,可以沿切向实时观察并永久存储等离子体截面的可

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Chinese Physics Letters 2014年第10期31卷 78-81页

作者：除立清胡立群陈开云李长征李二众赵金龙盛秀丽张继宗毛松涛 Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031

Repetitive impurity snake modes are observed after H-L mode transitions （high to low confinement modes） in EAST plasmas exhibiting multiple H-L-H transitions. Such snake modes are observed to lower the core plasma toroidal rotation. A critical impurity strength factor associated with snake-mode formation is estimated to be as high as αz,c = nz,cZ^2/ne - 0.75. These observations have implications for ITER H-mode sustainability when the heating power is only slightly above the H-mode power threshold.

关键词： Repetitive Transitions Repetitive