作者机构：
[Xia, Yiqun; Zheng, Weina; Li, Reirei; Xia, Liangshu] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Xia, Yiqun] China Inst Atom Energy, Dept Radiochem, POB 275-26, Beijing 102413, Peoples R China.;[Tans, Kaixuan] Univ South China, Sch Nucl Resource & Nucl Fuel Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xia, Liangshu] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
摘要：
Basic aspects of uranium adsorption by rice husk have been investigated. The influences of various experimental parameters such as pH, time, adsorbent dosage, rice husk size, temperature and various concentrations of uranium on uptake were evaluated. The thermodynamics and kinetics of adsorption were analyzed by FT-IR and SEM. The adsorption capacity for uranium on rice husk increased upon increasing initial concentration of uranium and temperature, while decreased with the increase of the amount of rice husk. Maximum uranium adsorption was observed at pH = 3 and particle size between 120 μm and 150 μm. Adsorption equilibrium was achieved within 60 min. At 25 °C, the saturated adsorption capacity qmax was up to 15.14 mg/g when the initial concentration of uranium ranged from 10 to 400 mg/dm3. The adsorption of uranium followed Langmuir adsorption isotherm and according to quasi-second order kinetic equation. The calculated values of δHo, δS0, and δGo indicated that the biosorption process was endothermic and spontaneous. Based on FT-IR spectra it may be concluded that hydroxyl, carbonyl, P-O and Si=O groups are the main active sites.
作者机构：
[李广] School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China;[谢珍妮; 袁小兰; 李瑞瑞; 夏良树] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
摘要：
Collisionless damping of the geodesic acoustic mode due to electron dynamics in rotating tokamak plasmas is investigated. A dispersion relation of the geodesic acoustic mode with a non-adiabatic electron response in a rotating tokamak is derived and solved both analytically and numerically. It is found that the collisionless damping of the geodesic acoustic mode, due to electron dynamics, significantly increases with the increasing toroidal rotation, especially in the large safety factor regime. The rotation-induced frequency up-shift of the geodesic acoustic mode increases the resonant velocity, which enables a larger number of electrons to resonate with the geodesic acoustic mode. The significant increase of the number of the resonant electrons significantly enhances the collisionless damping of the geodesic acoustic mode. The result indicates that in rotating tokamak plasmas a more complete picture of the geodesic acoustic mode should include the electron dynamics.
期刊：
PHYSICS OF PLASMAS,2016年23(1):012301 ISSN：1070-664X
通讯作者：
Cao, Jinjia
作者机构：
[Xiang, Dong; Huang, Qianhong; Gong, Xueyu; Cao, Jinjia] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wang, Aike] Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China.;[Yu, Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.
通讯机构：
[Cao, Jinjia] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
plasma collision processes;plasma flow;plasma kinetic theory;plasma transport processes
摘要：
The enhanced transport of passing energetic ions (PEIs) in presence of the resonant interactions with a rotating magnetic island is investigated within the drift kinetic framework. When the island rotation plays a role in the resonant interaction, we find that the velocities of PEIs satisfy a constraint relation of resonant flux surface in phase space. The resonant flux surfaces overlap with the magnetic flux surfaces in real space. A new transport channel responsible for the PEIs moving across the magnetic flux surfaces, i.e., continuously overlapping, is found. Two kinds of radial motions can be induced by the surface overlapping: one arises from the coupling between the resonance and the collision with the background plasma and the other from not completely overlapping of the two surfaces. The two radial motions and the symmetry-breaking induced radial motion constitute the total radial motion. When the pitch-angle scattering rate is very weak, the surface-shear induced transport is dominant. Only a small increase in the collision rate can significantly influence the total transport.
摘要：
The dependence of the wave packet process of three-level ladder K2 molecules on pulse width was investigated via time-dependent wave packet method, and was firstly quantified. There is no Autler-Townes splitting in the photoelectron spectrum with weaker pump intensity or shorter pulse width. The oscillation period of wave packet increases and the oscillation amplitude decreases with increasing pulse width. The pulse width affects Rabi oscillation, which results in the periodical change of the populations of the electronic state. Quantifying its effect on the population of the excited state shows that the change frequency varies with increasing pump intensity. The results illustrates that the needed population in electronic state of interested can be obtained by controlling pulse width, which provide some important basis for light manipulation of molecular processes experimentally.
作者机构：
[赵桂芝; 吴喜军; 李志强; 周青芝; 肖德涛; Shan, Jian] School of Nuclear Science and Technology, University of South China, Hengyang, China;[李志强] School of Physics and Electronic Engineering, Hengyang Normal University, Hengyang, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
作者机构：
[徐守龙; 蔡祥鸣; 武钊; 邹树梁] Hunan Provincial Key Laboratory of Emergency Safety Technology and Equipment for Nuclear Facilities, University of South China, Hengyang, 421001, China;[黄有骏] Nuclear Power Institute of China, Chengdu, 610213, China;[罗志平] Institute of Nuclear Agricultural Science &, Space Mutation Breeding, Changsha, 410125, China;[徐守龙; 蔡祥鸣; 武钊; 邹树梁] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
作者机构：
[Wang, Meng; Xu, Yuxi] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China.;[Wang, Meng] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.;[Duan, Xidong] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Duan, Xiangfeng] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.;[Duan, Xiangfeng] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA.
通讯机构：
[Xu, Yuxi] F;[Duan, Xiangfeng] U;Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China.;Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA.;Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA.
期刊：
PROCEEDINGS OF THE 24TH INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING, 2016, VOL 3,2016年3
通讯作者：
Zhou, Tao
作者机构：
[Zhou, Tao; Fang, Xiaolu; Wang, Yaoxin] North China Elect Power Univ, Nucl Safety & Thermal Power Standardizat Inst, Beijing, Peoples R China.;[Zhou, Lanyu] Univ South China, Inst Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Zhou, Tao] N;North China Elect Power Univ, Nucl Safety & Thermal Power Standardizat Inst, Beijing, Peoples R China.
会议名称：
24th International Conference on Nuclear Engineering
会议时间：
JUN 26-30, 2016
会议地点：
Charlotte, NC
会议主办单位：
[Wang, Yaoxin;Zhou, Tao;Fang, Xiaolu] North China Elect Power Univ, Nucl Safety & Thermal Power Standardizat Inst, Beijing, Peoples R China.^[Zhou, Lanyu] Univ South China, Inst Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
会议论文集名称：
Proceedings of the 2016 24th International Conference on Nuclear Engineering
关键词：
Fluent;Hagen Poiseuille formula;coefficient of dynamic viscosity
摘要：
Firstly, using Fluent laminar model simulate volumetric flow rate and pressure differential. second, using Hagen Poiseuille formula calculate coefficient of dynamic viscosity. Then we can calculate laminar flow numerical simulation error of fluent by contrasting the difference of coefficient of dynamic viscosity between laminar simulative results of Fluent and calculated results of Hagen Poiseuille formula. Geometric model is Circular pipe. Fluid medium is water. The study found three conclusions. Fluent model relies on simplified mathematical formula, which can not accurately describe real flow situation, so Fluent simulation results is not accurate; When inlet velocity is at the range of 0.06m/s to 0.15m/s, Given coefficient of dynamic viscosity by Fluent model is always smaller than calculated coefficient of dynamic viscosity by Hagen Poiseuille formula; Laminar flow numerical simulation error of Fluent in circular tube gradually increase along with the increase of inlet velocity at the range of 0.06m/s to 0.15m/s.
摘要：
The current driven by combined electron cyclotron wave (ECW) and high harmonic fast wave is investigated using the GENRAY/CQL3D package. It is shown that no significant synergetic current is found in a range of cases with a combined ECW and fast wave (FW). This result is consistent with a previous study [Harvey et al., in Proceedings of IAEA TCM on Fast Wave Current Drive in Reactor Scale Tokamaks (Synergy and Complimentarily with LHCD and ECRH), Arles, France, IAEA, Vienna, 1991]. However, a positive synergy effect does appear with the FW in the lower hybrid range of frequencies. This positive synergy effect can be explained using a picture of the electron distribution function induced by the ECW and a very high harmonic fast wave (helicon). The dependence of the synergy effect on the radial position of the power deposition, the wave power, the wave frequency, and the parallel refractive index is also analyzed, both numerically and physically.
摘要：
The effect of toroidal plasma rotation on q = 3 double tearing modes (DTMs) was studied numerically in cylindrical geometry using the method of reduced magnetohydrodynamic simulation. The results indicate that toroidal plasma rotation can reduce the growth rate of DTMs, but the magnitude of toroidal velocity has weak effect, especially without shear. When the shear of toroidal velocity exists, the suppression effect becomes better. Whether the velocity flow has shear or not, the growth rate of DTMs decreases as the magnitude of toroidal velocity increases. With the increase of velocity shear, the DTMs grow slowly. And the suppression effect of toroidal plasma rotation in early growth and transition stage is better, which means that the toroidal plasma rotation can suppress the linear growth of islands. Furthermore, the toroidal plasma rotation can suppress the evolution of poloidal stream. And the toroidal velocity shear on the q = 3 rational surface is more dominant than the magnitude of toroidal velocity in determining the DTM characteristics.
作者机构：
[阮锡超; 程品晶; 张奇玮; 贺国珠; 黄兴] Science and Technology on Nuclear Data Laboratory, China Institute of Atomic Energy, Beijing, China;[朱兴华] Huaneng Shandong Shidao Bay Nuclear Power Co., Ltd., Rongcheng, China;[黄兴; 程品晶] School of Nuclear Science and Technology, University of South China, Hengyang, China
