CAEP - China Academy of Engineering Physics

Mianyang, China

CAEP - China Academy of Engineering Physics

Mianyang, China

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Peng X.,China Academy of Engineering Physics | Wang Z.,CAEP - China Academy of Engineering Physics
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2014

The Z-pinch driven fusion-fission hybrid reactor (Z-FFR) concept, proposed by CAEP, utilizes high-energy neutrons produced by Z-pinch driven inertial confinement fusion (ICF) to drive the sub-critical fission reactor for energy release. The Z-FFR innovative concepts such as local-holistic-ignition fusion target and advanced sub-critical power reactor, and it has advantages in security, economy and environment, and might promisingly be a millennial energy source which could effectively solve the climate problem and deal with the energy crisis. This paper introduces the current status of the conceptual research on Z-FFR in CAEP. The principle, structure and operation characteristics of the energy system are expounded in three aspects, the fusion-target design, the low-repetitive Z-pinch driver and the sub-critical fission reactor. The costs of the system are estimated, and the future developmental roadmap is put forward.


Wang H.,CAEP - China Academy of Engineering Physics | Wang H.,Zuse Institute Berlin | Agarwal A.,Free University of Berlin
European Physical Journal: Special Topics | Year: 2015

In this paper, we investigate the equilibrium statistical properties of both the force and potential interpolations of adaptive resolution simulation (AdResS) under the theoretical framework of grand-canonical like AdResS (GC-AdResS). The thermodynamic relations between the higher and lower resolutions are derived by considering the absence of fundamental conservation laws in mechanics for both branches of AdResS. In order to investigate the applicability of AdResS method in studying the properties beyond the equilibrium, we demonstrate the accuracy of AdResS in computing the dynamical properties in two numerical examples: The velocity auto-correlation of pure water and the conformational relaxation of alanine dipeptide dissolved in water. Theoretical and technical open questions of the AdResS method are discussed in the end of the paper. © 2015, EDP Sciences and Springer.


Wang Y.,CAEP - China Academy of Engineering Physics
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2013

The interaction physics between energetic particle and plasma are introduced. The energy loss and energy needed by single particle and pass through time on energetic C, Si, Ar, Au and U in equimolar DT plasma at 1000 g/cm3 in density and 50 μm in diameter and room temperature were calculated by Monte Carlo method. The feasibility of ICF ignition by swift heavy ions irradiation were proved. In theory, heavier ion mass ensures better ICF ignition. The heavy ions beam intensity and single ion energy needed by ignition are about MA and over GeV, respectively. The duration is several picoseconds.


Cao Y.,CAEP - China Academy of Engineering Physics
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2013

The optimized design method based on signal to noise ratio of the image is presented for the object of two-dimensional Gaussian distribution based on the theoretical analysis of the technology of X-ray in-line phase contrast imaging. The imaging systems under the radiation of sub-micrometer focus X-ray source, laser-based micrometer focus X-ray source and synchrotron radiation X-ray source are optimized by means of numerical simulation. The outcome shows that the method based on signal to noise ratio can increase the signal to noise ratio of the image and get more reasonable imaging distance premised by decreasing the contrast slightly when compared with the contrast method.


Liang Z.,CAEP - China Academy of Engineering Physics
Lecture Notes in Electrical Engineering | Year: 2016

This paper focuses on the mechanical model uncertainty quantification when the system parameters are in the form of probability box; for example, when the probability distribution of the system variable is specified by interval parameters, the variable is in the form of probability box. We develop an improved outer discretization method (IODM) for constructing random sets which provides a convenient mechanism for representing probability box. The method can increase the fineness of the random set’s approximation to the bounds of the probability box with a limited focal element. It is shown that the method is helpful for the uncertainty quantification when the model is computationally expensive. © Springer-Verlag Berlin Heidelberg 2016.


Peng S.M.,CAEP - China Academy of Engineering Physics
Journal of Nuclear Materials | Year: 2015

Beryllides (Be12Ti) are expected to be used as the advanced neutron multiplier in the DEMO blanket because of their peculiar properties. In this paper the structural, elastic, and electronic properties of Be12Ti under high pressure are studied through first-principle calculations based on pseudopotential plane-wave density functional theory (DFT) within the generalized gradient approximation (GGA). The calculated lattice parameters are in good agreement with experimental data and the calculated elastic constants of Be12Ti increase monotonically with increasing pressure, demonstrating that Be12Ti satisfies the mechanical stability criteria under applied pressure. Related mechanical properties such as bulk modulus (B), shear modulus (G), Young's modulus (E), and Poisson's ratio (ν) are also studied for polycrystalline Be12Ti. The calculated B/G value shows that Be12Ti behaves in a ductile manner, and high pressure can significantly improve the ductility of Be12Ti. Additionally, the electronic properties of Be12Ti under several different pressures are successfully calculated and discussed. © 2015 Published by Elsevier B.V.


Gao Y.,CAEP - China Academy of Engineering Physics
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2015

The counter-Meshing Gears (CMG) mechanism is a discrimination mechanism which can be used in combination locks for high-consequence system surety. For an arbitrary binary Unlocking Symbol Sequence composed of equal number symbols of A and B, i.e. NA+NB, how to realize the binary discrimination teeth coding of its corresponding CMG mechanism with minimum fixed gear levels C and gear divisions D, is an important practical problem which is firstly well defined as the Optimal Normalizing CMG Coding Problem. With the toolbox comprising previously reported terms and methods, e.g. the CMG classification method, the 2-D Maze Map and the 3-color circular alternant coloring method for Critical Trap Grids (CTGs), optimal normalizing coding theory and methods for CMG Mechanisms are systematically discussed. Two optional coding methods, and their minimum requirement for the coding space (characterized with C×D) and coding algorithm, are all presented. A Figure of Merit (FoM) which characterizes the CMG coding efficiency is defined on the coding space and the symbol length of the Unlocking Symbol Sequence which dedicated for. By the FoM with clear physical meanings, the two optional Optimal Normalizing CMG Coding methods are compared, and it is concluded that the first type CMG mechanism with a coding space of C=3 and D=N+2 is the preferred method. As to the first type CMG mechanism, there is no difference between the Optimal Normalizing Coding, the previously reported Optimized coding with minimum gear levels, thus the minimum coding space of C=3 and D=N+2 are both needed and the 3-color circular alternant CTGs coloring method is a suitable coding method for both two. With application of the 3-color circular alternant CTGs coloring method, a distinct fingerprint feature can be revealed in the 2-D verification maze map that all CTGs are circular regularly allotted to only three color sets, i.e. the predesigned gear-teeth meshing between the two coupled composite gear A and B for error-locking function will alternately happen in only three discrimination gear levels. ©, 2015, Editorial Office of High Power Laser and Particle Beams. All right reserved.


Zhang L.,CAEP - China Academy of Engineering Physics | Du K.,CAEP - China Academy of Engineering Physics
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2013

Targets are physical base of the laser inertial confinement fusion (ICF) researches. The quality of the targets has extremely important influences on the reliabilities and degree of precision of the ICF experimental results. The characteristics of the ICF targets, such as complexity and microscale, high precision, determine that the target fabrication process must be a system engineering. This paper presents progresses on the fabrication technologies of ICF targets. The existing problem and the future needs of ICF target fabrication technologies are also discussed.


Wang Y.,CAEP - China Academy of Engineering Physics
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2012

The interaction physics between energetic particle and plasma are introduced. The energy loss, range and pass-through time of energetic electron, proton, D, T or He in pure D plasma of 500 g/cm 3 in density and 50 μm in diameter at room temperature or 10 keV were calculated by Monte-Carlo method. The results show that, for electron, proton, D, T or He beam, the lowest beam intensity needed for edge(center) igniting is 363(458), 187(355), 13.1(24.8), 10.9(20.9) or 9.34(17.0) MA, respectively; the longest time for single particle to pass through plasma is 0.036(0.078), 0.219(0.569), 0.241(0.651), 0.320(0.854) or 0.228(0.592) ps, respectively. All the time above is below the fuel confinement time. Because of the Bragg peak of energy loss curve or higher energy loss, the end of particle range should be located in the heating zone to improve the heating efficiency and lower the bunch intensity needed for ignition. The lowest energy for ignition should be realized by increasing bunch intensity.


He H.-L.,CAEP - China Academy of Engineering Physics
Gaoya Wuli Xuebao/Chinese Journal of High Pressure Physics | Year: 2013

A physical criterion of dynamic tensile fracture has been introduced, based on the knowledge of the micro-mechanism and the measurement of the damage evolution. The physical criterion has suggested two critical damage parameters, named as the critical void coalescence damage Dl and the critical fracturing damage Df. These two parameters are associated with a damage function model and a percolation-softening function, by which the fracture process is characterized as that the damage slowly increases in a linear manner from the initial state (D=D0) to the void linkage state (D=Dl), then changes to a nonlinear growth and rapidly approaches to the critical fracturing state (D=Df), while a final step catastrophically leads to the complete fracture state (D=1.0). Experimental measurements and numerical simulations for both of the plate impact and the cylindrical tube have verified that these two parameters (Dl and Df) physically constrain the dynamic tensile fracture and may be considered as the intrinsic material constant. Application of this physical criterion for the prediction of dynamic tensile fracture under intricate loading and for complex geometrical system has been discussed.

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