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Extended Bonner sphere spectrometer for dynamic neutron spectrum on HL-2A

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Plasma Science and Technology 2017年第7期19卷 118-123页

作者： Chunyu JIANG Jing CAO Zihao LIU Xiaofei JIANG xianying song Yipo ZHANG Zejie YIN Department of Modern Physics University of Science and Technology of China Hefei 230026 People＇s Republic of China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of China Hefei 230026 People＇s Republic of China Southwestern Institute of Physics Chengdu 610041 People＇s Republic of China

The extended Bonner sphere spectrometer （EBSS） at the HL-2A tokamak for the neutron spectrum is described. This device was developed on the basis of previous Bonner sphere spectrometry （BSS）, aiming to obtain a more accurate neutron spectrum in the HL-2A tokamak hall. The previous BSS contained eight Bonner spheres （BS）. This EBSS contains 13 3He-filled detectors embedded in polyethylene spheres （PS）, pre-amplifiers, and a parallel processing data acquisition system （DAQ）. A response matrix is simulated in Geant4 taking the effect of the environment into account.

关键词： extended Bonner sphere spectrometer neutron spectrum tokamak

Dose Monitoring of Pulse Neutron on HL-2A Tokamak

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Southwestern Institute of Physics Annual Report 2005年第1期 85-86页

作者： song xianying LI Xu YANG Jinwei

From Sep. 3 of 2005 to Oct. 26, the HL-2A tokamak experiment carded out 42 days discharge operation, and successfully completed many experiments. These experiments include divertor operation, high density, molecular beam injection, LHCD, siliconizafion. Experimental results create new records. The parameters achieved in that year were as follows： plasma current Ip = 320 kA, toroidal magnetic field BT=2.2 T, plasma density ne = 4.2×10^19 m^-3, plasma exist time tp = 1580 ms, plasma current plateau time is 1200 ms, electron temperature is 900 eV, ion temperature is 800 eV. To protect worker and public and assess neutron radiation level, we monitored neutron dose in radiation controlled area by the pulse neutron dose monitoring system, which was made by institude of high energy physics, chinese academy of sciences and southwestern institute of physics, china nation nuclear corporation （ CNNC ）.

关键词： Photoneutron Neutron dose Dose assessment

Development of Prototype Neutron Flux Monitor for ITER

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Plasma Science and Technology 2005年第3期7卷 2860-2862页

作者： Yang Jinwei song xianying Zhang Wei Li Xu Lee Wenzhong Wang Shiqing Xiao Gongshan Yang Bo Lu Shuangtong Southwestern Institute of Physics Chengdu 610041China Beijing Nuclear Instruments Factory Beijing 100020China

The prototype neutron flux monitor consists of a high purity ^(235)U fission chamber detector and a'blank'detector,which is a fissile material free detector with the same dimension as the fission chamber detector to identify noise issues such as noise coming from gamma *** main parameters of the fission chamber assembly that have been measured in the laboratory are confirmed to approach the technological level of the International Thermonuclear Experimental Reactor(ITER)in the near *** prototype neutron flux monitor will be further developed to become a neutron flux monitor suitable for the operation phase of D-D fusion on the ITER.

关键词： neutron flux monitor fission chamber detector international thermonuclear experimental reactor(ITER) plateau characteristic curve discrimination threshold

Fusion Neutron Flux Monitor for ITER

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Southwestern Institute of Physics Annual Report 2004年第1期 47-50页

作者： YANG Jinwei ZHANG Wei song xianying LI Xu

It is necessary to develop a series of fission chamber in different sensitivities from high to very low sensitivity for covering the yield range of fusion neutron 10^13～10^21n·s-1 produced by ITER. The high sensitivity fission chamber employs high purity 235U as fissile material, 1 ～ 1.5 g 235U is coated on the multi-electrodes, its structure is shown in Fig. 1 （a）.

关键词： ITER NFM FC

Development of Electron Temperature Measuring System by Silicon Drift Detector

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Southwestern Institute of Physics Annual Report 2005年第1期 20-22页

作者： song xianying YANG Jinwei LIAO Min LI Xu ZHANG Yipo FUBingzhong LUO Cuiwen

The soft X-ray spectroscopy, laser Thomson scattering and electron cyclotron emission （ ECE ） are usually adopted for electron temperature measurement in fusion research of magnetic confinement. The particular soft X-ray spectroscopy has the very good spatial-temporal resolution and smaller measuring error than laser Thomson scattering, a close spatial-temporal resolution to ECE, absolute measurement ability, and smaller influence by suprathermal and runaway electrons than ECE.

关键词： Soft X-ray spectroscopy Silicon drift detector Electron temperature

Observations of Runaway Electron Generation during Disruptions on HL-2A Tokamak

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Southwestern Institute of Physics Annual Report 2004年第1期 6-8页

作者： YANG Qingwei YANG Jinwei song xianying CUI Zhengying LI Wei ZHOU Hangyu DING Xuantong

The major disruption can not only lead to the great heat loads and produce the large electromagnetic force on the first wall and divertor plates, but also can generate the runaway electrons. The runaway electrongenera... 详细信息

关键词： Runaway electron Disruption

Synergetic Effects of Runaway Electron and Vertical Instability on the Wall Damage on HL-2A Tokamak

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Southwestern Institute of Physics Annual Report 2005年第1期 17-19页

作者： YANG Yinwei YUAN Baoshan YANG Qingwei ZHANG Yipo song xianying LI Xu ZHENG Yinjia CAO Zeng

1 Generation of vertical instability Tokamak experiments show that the energy confinement time and performance are better, and the larger plasma current can be achieved for non-circular cross-sectional shape of plasma than circular cross-section. However, the external magnetic fields which are used to produce the non-circular cross sectional shape also cause the confined plasma to become unstable to small vertical displacement. In general, the ratio of elongation k is larger, the possibility of instability is more. In practice, this vertical displacement mode stabilized by feedback control system or other provided external radial magnetic field to balance out the plasma motion. Under some of situations the control system may be fail due to rapid growth rate of instability exceeding the ability of controlling. The plasma will then move vertically upwards or downwards depending upon the characteristics of instability and control failure.

关键词： Runaway electron Vertical displacement episode(VDE) Halo current

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宁波市城市污水处理厂污泥处置方案探讨

环境污染与防治 2005年第3期27卷 225-228页

作者：包薇红宋贤英宁波市环境保护科学研究设计院浙江宁波315010

随着城市污水处理率提高导致的污水污泥产量的增长趋势也使得污水污泥的处理问题更为突出。在总结国内外城市污泥处置技术发展趋势的基础上,结合宁波市的实际情况,根据无害化、减量化和资源化的原则,提出城市污泥近远期处置方案,并对处... 详细信息

随着城市污水处理率提高导致的污水污泥产量的增长趋势也使得污水污泥的处理问题更为突出。在总结国内外城市污泥处置技术发展趋势的基础上,结合宁波市的实际情况,根据无害化、减量化和资源化的原则,提出城市污泥近远期处置方案,并对处置方案作出可行性分析。

关键词：污泥处置城市污水处理厂宁波市方案探讨技术发展趋势处置方案污水处理率污水污泥增长趋势污泥产量城市污泥国内外无害化资源化减量化

Evolution of Electron Velocity Distribution during ECRH and Heating Effect Analysis

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Southwestern Institute of Physics Annual Report 2005年第1期 15-16页

作者： YANG Jinwei ZHANG Yipo LIAO Min LI Xu song xianying FU Bingzhong RAO Jun LI Yongge LUO Cuiwen CHEN Liaoyuan

1 Electron velocity distributions and energy deposition of ECW Two set of soft X-ray spectra detection system consist of high performance sillicon drift detectors （SDD） , high speed A/D transform and processing software, software pulse height analyzer （SPHA）. They are installed at mid plane （ r=0 ） and undermid plane （ r=-16.4 cm ） of HL-2A tokamak respectively to measure the time evolution of soft X-ray spectra. According to spectrum, the thermal electron and superthermal electron temperatures are derived. Because of the ratio of peak counts to background counts is very high （p/b 〉1 400-3000 ） ,

关键词： ECRH SDD Electron velocity distribution