作者机构：
[李克华; 路兴强; 李景春; 龚学余] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[李克华] Department of Nuclear Engineering and Nuclear Technology, Engineering and Technical College of Chengdu University of Technology, Leshan 614000, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
作者机构：
[刘庆成; 刘玉娟; 吴和喜; 杨磊] Engineering Research Center of Nuclear Technology Application, Ministry of Education, East China Institute of Technology, Nanchang 330013, China;[袁新宇] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[刘庆成; 刘玉娟; 吴和喜; 杨磊] School of Nuclear Engineering and Technology, East China Institute of Technology, Fuzhou 344000, China
通讯机构：
Engineering Research Center of Nuclear Technology Application, Ministry of Education, East China Institute of Technology, China
摘要：
Heating of ions by two Alfvén waves propagating along an external magnetic field via nonresonant wave-particle interaction in low-β plasmas is studied using test-particle simulation. Due to subcyclotron ion resonance, the heating effect of the left-hand polarized Alfvén wave pair is 10% greater than that of the right-hand polarized pair. The results show that the perpendicular and parallel (to the external magnetic field) temperatures, as well as the parallel fluid velocity, vary sinusoidally with the phase difference. Furthermore, the magnitude of the oscillations decreases with the ratio of the frequencies of the two waves. When the frequency ratio reaches above 2, the effect of the phase difference vanishes.
摘要：
A wireless sensing method for the measurement of gamma radiation dose has been developed based on the fact that gamma rays can initiate the polymerization of acrylamide, which causes an increase in solution viscosity that can be detected with a wireless magnetoelastic sensor. The magnetoelastic sensor is able to wirelessly detect the resonance frequency shifts of a magnetoelastic foil in response to changes in solution viscosity. There is a linear relationship between the resonance frequency shift and gamma radiation dose in the range of 0–50 Gy (under optimal conditions) with a detection limit of 0.25 Gy. This method has the advantage of providing real-time, continuous measurement in situ. The method has been used successfully to determine the gamma radiation dose in real exposure scenarios, with satisfactory results.
作者机构：
[杨海燕; 屈国普] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[刘福东] Nuclear and Radiation Safety Center, Ministry of Environmental Protection of the People's Republic of China, Beijing 100082, China;[杨海燕; 姜子英; 王春红] China Institute of Atomic Energy, P. O. Box 275-82, Beijing 102413, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
作者机构：
[杜丹] Department of Mathematics and Physics, University of South China, Hengyang, China;[曹锦佳; 王振华; 龚学余; 扬文超; 郑平卫] Department of Nuclear Science and Technology, University of South China, Hengyang, China
通讯机构：
Department of Mathematics and Physics, University of South China, China
作者：
Yu, Jun*;Dong, J. Q.;Li, X. X.;Du, D.;Gong, X. Y.
期刊：
Journal of Plasma Physics,2012年78(6):651-655 ISSN：0022-3778
通讯作者：
Yu, Jun
作者机构：
[Du, D.; Yu, Jun] Univ S China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Dong, J. Q.] Zhejiang Univ, Inst Fus Theory & Simulat, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China.;[Dong, J. Q.] SW Inst Phys, Chengdu, Peoples R China.;[Li, X. X.; Gong, X. Y.] Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Yu, Jun] U;Univ S China, Sch Math & Phys, Hengyang 421001, Hunan, Peoples R China.
摘要：
Excitation of the geodesic acoustic mode continuum by drift wave turbulence is studied using the wave kinetic approach. For a model profile of weak non-uniform ion temperature, the forms of growth rate and radial structure of geodesic acoustic modes are obtained analytically. The growth rate is analyzed for several conditions for present-day tokamaks and compared with that for uniform ion temperature, as well as that given by the coherent mode approach for non-uniform ion temperature.
作者：
Du, Dan*;Gong, Xueyu;Wang, Zhenhua;Yu, Jun;Zheng, Pingwei
期刊：
Journal of Plasma Physics,2012年78(6):595-599 ISSN：0022-3778
通讯作者：
Du, Dan
作者机构：
[Du, Dan; Yu, Jun] Univ S China, Dept Math & Phys, Hengyang City, Hunan, Peoples R China.;[Wang, Zhenhua; Gong, Xueyu] Univ S China, Dept Nucl Sci & Technol, Hengyang City, Hunan, Peoples R China.;[Zheng, Pingwei] Univ S China, Dept Environm Protect & Safety Engn, Hengyang City, Hunan, Peoples R China.
通讯机构：
[Du, Dan] U;Univ S China, Dept Math & Phys, Hengyang City, Hunan, Peoples R China.
摘要：
A well-optimized design of an ion cyclotron resonance heating (ICRH) antenna is very important for steady-state plasma heating with high radio frequency (RF) power of several tens of megawatts. However, a sharp decrease in the coupling RF power because of impedance mismatch of ICRH system is an issue that must be resolved for present-day fusion reactors and International Thermonuclear Experimental Reactor. This paper has theoretically analyzed the ICRH antenna's impedance matching for ELMy plasmas on experimental advanced superconducting tokamak (EAST) by the transmission line theory. The results indicate that judicious choice of the optimal feeder location is found useful for adjustable capacitors' tolerance to the variations of the antenna input impedance during edge-localized mode (ELM) discharge, which is expected to be good for the design of ICRH antenna system and for real-time feedback control during ELM discharge on EAST.
期刊：
Journal of Instrumentation,2012年7(8):T08004 ISSN：1748-0221
通讯作者：
Tan, Y.
作者机构：
[Tan, Y.] Hengyang Normal Univ, Dept Phys & Elect, Hengyang City, Peoples R China.;[Xiao, D.] Univ S China, Sch Nucl Sci & Technol, Hengyang City, Peoples R China.;[Tan, Y.] Hengyang Normal Univ, Dept Phys & Elect, Huangbai Rd, Hengyang City, Peoples R China.
通讯机构：
[Tan, Y.] H;Hengyang Normal Univ, Dept Phys & Elect, Huangbai Rd, Hengyang City, Peoples R China.
关键词：
Detector control systems (detector and experiment monitoring and slow-control systems, architecture, hardware, algorithms, databases);Data acquisition concepts
作者机构：
[刘燕; 尹岚; 彭晓炜; 杨磊; 龚学余] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;[彭晓炜] Department of Engineering Physics, Tsinghua University, Beijing 100084, China;[刘燕; 杨磊] School of Opto-Electronic Information Science and Technology, Yantai University, Yantai 264005, China
通讯机构：
School of Nuclear Science and Technology, University of South China, China
摘要：
The radon exhalation rate from the medium surface is commonly derived using a scheme involving a radon detector and an accumulation chamber. The accumulation chamber accumulates the radon gas to make its concentration level inside the chamber detectable by the radon detector in the scheme. The common calculation method for deriving the exhalation rate is based on an assumption that the radon concentrations in the detector's internal cell and that in the accumulation chamber become equal with sufficient accumulation time. However, based on our recent experiments, this method tends to underestimate the actual exhalation rates as generated by our simulation facility. To correct this, we develop a new method for computing the exhalation rate based on the non-equilibrium concept. This paper presents the new method.
