WO2011016333A1 - 核融合照射配位決定方法、核融合照射配位決定装置、及び核融合装置 - Google Patents
核融合照射配位決定方法、核融合照射配位決定装置、及び核融合装置 Download PDFInfo
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
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- G21B1/00—Thermonuclear fusion reactors
- G21B1/11—Details
- G21B1/23—Optical systems, e.g. for irradiating targets, for heating plasma or for plasma diagnostics
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- H05H1/00—Generating plasma; Handling plasma
- H05H1/02—Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma
- H05H1/22—Arrangements for confining plasma by electric or magnetic fields; Arrangements for heating plasma for injection heating
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- the present invention relates to a fusion irradiation coordination determination method, a fusion irradiation coordination determination apparatus, and a fusion apparatus manufactured by using the fusion irradiation coordination determination method for determining the irradiation coordination of energy rays for a fusion fuel.
- Fusion is expected as a future energy source to replace fossil fuels.
- laser fusion which is a method of inertial fusion
- PW petawatt
- the fuel is compressed (implosion) in the center of the target by irradiating the laser beam to the fusion target (pellet), and it is extremely high. A density state is created.
- high density compression of the fuel is indispensable for stably generating the inertial fusion, and for that purpose, it is necessary to irradiate and compress the fusion target as uniformly as possible.
- a fusion apparatus in which the irradiation configuration of 60 laser lights is set to be spherically symmetric is known (see Non-Patent Document 1 below).
- the above-described conventional apparatus still has a problem that the uniformity of laser light irradiation is not sufficient to cause inertial fusion.
- the present invention has been made in view of such problems, and a fusion irradiation coordination determination method and fusion irradiation coordination determination that can efficiently improve the uniformity of the energy rays to be irradiated.
- An object is to provide a device and a fusion device.
- a fusion irradiation coordination determination method of the present invention is a method for calculating an irradiation configuration of an energy beam when irradiating an energy beam to a fusion fuel, and the information processing apparatus
- An initial placement step of virtually placing a predetermined number of charges on each of a predetermined number of initial coordinates on a spherical surface set using random numbers, and a predetermined number of charges placed on the initial coordinates by the information processing device Based on the Coulomb force acting between a predetermined number of charges, a coordinate analysis step for constraining the spherical surface and analyzing in time series, and an information processing device based on the coordinates analyzed by the coordinate analysis step
- a potential evaluation step for determining when the potential energy of a predetermined number of charges is stabilized, and a predetermined time at which the information processing device is determined in the potential evaluation step.
- the fusion irradiation coordination determining device of the present invention is an information processing device that calculates the irradiation coordination of energy rays when irradiating the fusion fuel with energy rays, and is set using a random number
- An initial placement means for virtually placing a predetermined number of charges on each of a predetermined number of initial coordinates on the spherical surface and a coordinate of the predetermined number of charges placed on the initial coordinates act between the predetermined number of charges.
- Coordinate analysis means that constrains on the spherical surface based on Coulomb force and analyzes in time series, and potential that determines the time when the potential energy of a predetermined number of charges is stabilized based on the coordinates analyzed by the coordinate analysis means
- the coordinates of the predetermined number of charges at the time determined by the evaluation means and the potential evaluation means are derived as the irradiation coordinates of the energy rays when the fusion fuel is arranged at the center of the spherical surface.
- a radiation coordination deriving means that constrains on the spherical surface based on Coulomb force and analyzes in time series, and potential that determines the time when the potential energy of a predetermined number of charges is stabilized based on the coordinates analyzed by the coordinate analysis means
- the coordinates of the predetermined number of charges at the time determined by the evaluation means and the potential evaluation means are derived as the irradiation coordinates of the energy rays when the fusion fuel is arranged at the center of the sp
- fusion irradiation coordination determination method and fusion irradiation coordination determination apparatus charges are virtually arranged at a predetermined number of initial coordinates on the spherical surface by the information processing apparatus, and the coordinates of the charges are time-series. Based on the coordinates when the potential energy of the charge is stabilized, the irradiation configuration of the energy beam when the fusion fuel is arranged at the center of the spherical surface is derived. Thereby, the uniformity of the irradiation intensity
- the fusion apparatus of the present invention is a fusion apparatus manufactured using the above-described fusion irradiation coordination determination method, and is a fusion target for igniting a fusion reaction by irradiating energy rays. And a predetermined number of energy ray sources provided at positions corresponding to the irradiation configuration calculated by the fusion irradiation configuration determining method when the fusion target is arranged at the center of the spherical surface.
- the uniformity of the irradiation intensity of the energy beam for the fusion fuel is improved, so that the inertial fusion can be stably generated.
- the uniformity of the energy beam to be irradiated can be improved efficiently.
- FIG. 8A is a diagram showing the principle of the central ignition method, which is one method of inertial fusion
- FIG. 8B is a diagram showing the principle of the fast ignition method, which is another method of inertial fusion.
- a spherical target 901 composed of a DT fuel layer 902 and an ablator layer 903 is used as a fusion target (pellet) for igniting a fusion reaction.
- the spherical fuel layer 902 is compressed in a spherical symmetry. Then, the relatively low-density high-temperature plasma formed in the central portion at the final stage is compressed by the surrounding low-temperature and high-density plasma, thereby generating a hot spot for igniting the fusion reaction in the central portion.
- a target 911 composed of a DT fuel layer 912, an ablator layer 913, and a cone 914 is used.
- the fuel layer 912 is compressed to the center by irradiating the fuel portion of the target 911 with the laser beam 915B.
- the petawatt laser beam 915A is irradiated from the cone 914 side, and high energy electrons are generated at the tip of the cone 914.
- the high-energy electrons are transmitted through and transported through a cone 914 made of a metal thin film such as gold, and finally heat the fuel compressed to a high density, thereby generating a hot spot for ignition of a fusion reaction.
- the fusion irradiation coordination determination method and fusion irradiation coordination determination apparatus of the present invention are for designing the irradiation coordination of energy rays in a fusion apparatus in order to meet such a requirement.
- a laser beam is used as an energy beam irradiated during fusion ignition
- a D (deuterium) -T (tritium) reaction is assumed as a fusion reaction
- a DT fuel is assumed as a corresponding fusion fuel.
- FIG. 1 is a block diagram showing a functional configuration of an irradiation configuration determining apparatus 1 according to a preferred embodiment of the present invention
- FIG. 2 is a hardware block diagram showing a hardware configuration of the irradiation configuration determining apparatus 1.
- FIG. 3 is a perspective view of the information processing apparatus that operates as the irradiation configuration determination apparatus 1.
- the irradiation configuration determination apparatus 1 functionally includes an input unit 101, an initial arrangement unit (initial arrangement unit) 102, a coordinate analysis unit (coordinate analysis unit) 103, and a potential evaluation unit (potential evaluation unit). Means) 104, an optimum coordination determining unit (irradiation coordination deriving unit) 105, and an output unit 106.
- the information processing apparatus 30 shown in FIGS. 2 and 3 operates as the irradiation coordination determination apparatus 1.
- the information processing apparatus 30 includes a reading device 12 such as a floppy disk drive device, a CD-ROM drive device, a DVD drive device, a working memory (RAM) 14 in which an operating system is resident, and a program stored in the recording medium 10.
- a display device 18 such as a display, a mouse 20 and a keyboard 22 as input devices, a communication device 24 for sending and receiving data and the like, and a CPU 26 for controlling execution of a program.
- the information processing device 30 can access the program stored in the recording medium 10 from the reading device 12, and the irradiation configuration determining device 1 according to the present invention is used by the program. It becomes possible to operate as.
- the functions realized by the respective units shown in FIG. 1 are such that a predetermined program is read on the hardware such as the CPU 26 and the memory 16 shown in FIG. This is realized by operating the mouse 20, the keyboard 22, and the display 18 and reading and writing data in the work memory 14 and the memory 16.
- the input unit 101 accepts an input of the number of irradiation coordinates of energy rays in the fusion device to be designed. That is, the input unit 101 receives information on the number of irradiation coordinates using the mouse 20 and the keyboard 22, and stores the received data on the number of irradiation coordinates in the work memory 14 or the like.
- the initial placement unit 102 has a random number generation unit 102a, and sets the spherical S 0 centered at the origin O in a virtual space, with reference to the random number generated by the random number generation unit 102a
- the initial placement unit 102 arranged at a position represented by virtually N B number of charge Q i the respective initial coordinate r0 i on a sphere S 0.
- the coordinate analysis unit 103 adds a condition (
- the second term on the right side of the above formula (1) is an artificial viscosity term for preventing minute vibration of the solution.
- Optimal coordination determination unit 105 when the potential energy is determined to be stabilized by potential evaluation unit 104, identifies the coordinates r i of N B number of charge Q i corresponding to the stabilization time. Then, the optimum coordination determining unit 105 derives these coordinates r i as coordinates corresponding to the optimum irradiation coordination of energy rays when the fusion target is arranged at the center of the spherical surface S 0 . Then, the optimum coordination determining unit 105 sends the derived coordinates r i to the output unit 106, and the output unit 106 outputs the output to the display 18 and the communication device 24 in a predetermined output format such as a table data format.
- a predetermined output format such as a table data format.
- FIG. 4 is a flowchart showing a processing procedure when determining the irradiation configuration by the irradiation configuration determining apparatus 1.
- the input unit 101 of the illumination coordinated determining apparatus 1 the input of the irradiation coordination number N B of the energy ray on nuclear fusion device to be designed is accepted (step S201).
- the potential evaluation unit 104 determines whether or not the sum E P of potential energies of all charges Q i is equal to or less than the threshold Th P , and the determination result is sent to the optimum coordination determination unit 105 (step S206). ).
- the optimal coordination determination unit 105 determines whether the sum E P is equal to or less than the threshold value Th P (step S206; YES).
- the optimal coordination determination unit 105 the N B number of coordinates r i being calculated at that point, fusion target the determined as coordinates corresponding to the optimum irradiation coordination of energy rays when is placed in the center of the spherical S 0.
- the output unit 106 outputs information related to the coordinates of the optimal irradiation configuration to the display 18 or the like, and the process ends (step S207).
- step S206 when the total sum E P exceeds the threshold Th P (step S206; NO), the process returns to step S203, and the calculation of the coordinates r i of the charge Q i related to the time of the next step is repeated.
- FIG. 5 is a plan view showing the structure of the fusion device 201 manufactured based on the coordinates of the optimum irradiation configuration in this case, and FIG. 6 shows the irradiation configuration of energy rays in the fusion device 201 of FIG. It is a conceptual diagram for demonstrating.
- the nuclear fusion device 201 includes a spherical target 202 and a laser light irradiation source 203 that is disposed at 48 locations around the spherical target 202 and that irradiates the spherical target 202 with laser light. Yes.
- the laser beam irradiation source 203 is provided at a position where the spherical target 202 corresponds to the optimal irradiation coordination of assuming are located at the center of the sphere S 0.
- the laser beam irradiation source 203 passes through the virtual coordinate points P A and P B on the spherical surface S 0 derived by the irradiation configuration determining device 1, toward the center of the spherical target 202, and the laser beam L It arrange
- These coordinate points for determining the optimal coordination of the laser beam irradiation source 203 two sets of the 24-point coordinate pattern P A, divided into P B, the coordinate point P A, which corresponds to the pattern A in Table 1 adjacent Six squares are formed by four points, and coordinate points P B corresponding to the pattern B in Table 1 form eight equilateral triangles by three adjacent points. Then, as shown in FIG.
- the center of gravity G B of the eight equilateral triangles formed by the coordinate point P B is positioned on the extended line from the center of each face of octahedron S 1 around the spherical target 202 heart
- the laser beam irradiation source 203 is arranged such that the six square centroids G A formed by the coordinate points P A are located on an extension line from the center of each vertex of the regular octahedron S 1 .
- a laser beam irradiation source is provided at a position corresponding to the irradiation configuration.
- the coordinates ( ⁇ , ⁇ ) obtained by applying the are the coordinates of the optimum irradiation configuration derived by the irradiation configuration determining device 1.
- the information processing device 30 virtually arranges the charge Q i at the initial coordinates of the irradiation configuration number N B on the spherical surface S 0 , coordinates r i charge Q i is analyzed in a time series, based on the coordinates r i of the time the sum E P of the potential energy of the charge Q i is stabilized, it is arranged fusion target in the center of the spherical surface S 0
- the irradiation configuration of the energy beam is derived.
- the uniformity of the irradiation intensity of the laser beam to the fusion fuel is improved with a smaller number of coordinations than the conventional one. be able to.
- FIG. 7 is a graph showing a simulation result of irradiation uniformity of the fusion apparatus in the present embodiment.
- the power non-uniformity on the horizontal axis indicates the degree of intensity difference between laser beams of a plurality of coordinations
- the irradiation uniformity on the vertical axis indicates the laser light irradiation on the spherical surface S 0.
- a value obtained by dividing the standard deviation of the intensity by the average value is shown.
- the irradiation coordination of the laser light obtained by the irradiation coordination determining method and the irradiation coordination determining apparatus 1 of the present embodiment when the irradiation coordination number N B is larger than 20, the center of the spherical surface S 0 is set. It was also confirmed that there were no laser beams facing each other as a reference. Therefore, it is possible to avoid performance degradation due to damage caused by the facing laser light source.
- the irradiation distribution with improved uniformity of laser beam irradiation is determined.
- the position can be efficiently derived within a limited range of calculation capability and calculation time.
- the uniformity of the irradiation intensity of the energy beam with respect to the fusion target is improved. It can be generated stably.
- the potential evaluation step it is determined whether or not the temporal change in the sum of potential energies of the predetermined number of charges at the time is less than or equal to a predetermined value, or the potential evaluation means It is preferable to determine whether or not the temporal change in the total potential energy is equal to or less than a predetermined value. In this case, irradiation coordination with improved uniformity of energy beam irradiation can be efficiently derived.
- the present invention uses a fusion irradiation coordination determination method, a fusion irradiation coordination determination apparatus, and a fusion apparatus manufactured by using the fusion irradiation coordination determination method for determining the irradiation coordination of energy rays for fusion fuel, and irradiation. It is possible to efficiently improve the uniformity of the energy rays to be performed.
- Irradiation configuration determination apparatus 30 ... Information processing apparatus, 102 ... Initial arrangement part (initial arrangement means), 103 ... Coordinate analysis part (coordinate analysis means), 104 ... Potential evaluation part (potential evaluation means), 105 ... Optimum Coordination determining unit (irradiation configuration deriving means), 201... Fusion device, 202... Spherical target (fusion target), 203... Laser beam irradiation source (energy ray source), S 0 .
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Abstract
Description
を用いて、電荷Qiの座標ri(i=1,…,NB)に関するNB個の連立運動方程式を時間積分して解くことにより、全ての座標riを時系列に算出する。ここで、上記式(1)の右辺第2項は解の微小振動を防止するための人工粘性項である。
により計算する。そして、ポテンシャル評価部104は、総和EPの時間的変化が所定の閾値ThP以下であるか否かを判定することによって、電荷Qiのポテンシャルエネルギーが安定化したか否かを判定する。例えば、前回計算された座標riに基づく総和EPと今回計算された座標riに基づく総和EPとの差が、閾値ThP=10-16以下であるか否かを判定する。
ここで、導出される座標は、仮想的な球面S0上の極座標(θ,φ)によって表されている。図5は、この場合の最適照射配位の座標に基づいて製造された核融合装置201の構造を示す平面図であり、図6は、図5の核融合装置201におけるエネルギー線の照射配位を説明するための概念図である。
照射配位数NB=24の場合には、次表3に示すデータに対して次式;
θi+4m+8k=(-1)mθi+180m,
φi+4m+8k=(-1)mφi+95.6192m+120k,
i=1,2,3,4; m=0,1; k=0,1,2
を適用することにより得られる座標(θ,φ)が、照射配位決定装置1によって導出される最適照射配位の座標である。
θi+6m+12k=(-1)mθi+180m,
φi+6m+12k=(-1)mφi+37.2604m+90k,
i=1,2,…,6; m=0,1; k=0,1,2,3
を適用することにより得られる座標(θ,φ)が、照射配位決定装置1によって導出される最適照射配位の座標である。
θi+7m+14k=(-1)mθi+180m,
φi+7m+14k=(-1)mφi+88.8328m+72k,
i=1,2,…,7; m=0,1; k=0,1,2,3,4,
(θ71,φ71)=(0,0),(θ72,φ72)=(180,0)
を適用することにより得られる座標(θ,φ)が、照射配位決定装置1によって導出される最適照射配位の座標である。
Claims (5)
- 核融合燃料に対してエネルギー線を照射する際の前記エネルギー線の照射配位を算出する方法であって、
情報処理装置が、乱数を用いて設定された球面上の所定数の初期座標のそれぞれに、仮想的に前記所定数の電荷を配置する初期配置ステップと、
前記情報処理装置が、前記初期座標に配置された前記所定数の電荷の座標を、前記所定数の電荷の間に作用するクーロン力に基づいて、前記球面上に拘束させて時系列に解析する座標解析ステップと、
前記情報処理装置が、前記座標解析ステップによって解析された座標に基づいて、前記所定数の電荷のポテンシャルエネルギーが安定化した時点を判定するポテンシャル評価ステップと、
前記情報処理装置が、前記ポテンシャル評価ステップにおいて判定された時点における前記所定数の電荷の座標を、前記球面の中心に核融合燃料を配置させた場合の前記エネルギー線の照射配位として導出する照射配位導出ステップと、
を備えることを特徴とする核融合照射配位決定方法。 - 前記ポテンシャル評価ステップでは、前記時点における前記所定数の電荷のポテンシャルエネルギーの総和の時間的変化が所定値以下であるか否かを判定する、
ことを特徴とする請求項1記載の核融合照射配位決定方法。 - 核融合燃料に対してエネルギー線を照射する際の前記エネルギー線の照射配位を算出する情報処理装置であって、
乱数を用いて設定された球面上の所定数の初期座標のそれぞれに、仮想的に前記所定数の電荷を配置する初期配置手段と、
前記初期座標に配置された前記所定数の電荷の座標を、前記所定数の電荷の間に作用するクーロン力に基づいて、前記球面上に拘束させて時系列に解析する座標解析手段と、
前記座標解析手段によって解析された座標に基づいて、前記所定数の電荷のポテンシャルエネルギーが安定化した時点を判定するポテンシャル評価手段と、
前記ポテンシャル評価手段によって判定された時点における前記所定数の電荷の座標を、前記球面の中心に核融合燃料を配置させた場合の前記エネルギー線の照射配位として導出する照射配位導出手段と、
を備えることを特徴とする核融合照射配位決定装置。 - 前記ポテンシャル評価手段は、前記時点における前記所定数の電荷のポテンシャルエネルギーの総和の時間的変化が所定値以下であるか否かを判定する、
ことを特徴とする請求項3記載の核融合照射配位決定装置。 - 請求項1記載の核融合照射配位決定方法を用いて製造された核融合装置であって、
エネルギー線を照射することによって核融合反応を点火させるための核融合ターゲットと、
前記核融合ターゲットを前記球面の中心に配置させたときの前記核融合照射配位決定方法で算出された照射配位に相当する位置に設けられた前記所定数のエネルギー線源と、
を備えることを特徴とする核融合装置。
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US13/388,500 US9230694B2 (en) | 2009-08-06 | 2010-07-20 | Method of determining nuclear fusion irradiation coordinates, device for determining nuclear fusion irradiation coordinates, and nuclear fusion device |
JP2011525844A JP5669106B2 (ja) | 2009-08-06 | 2010-07-20 | 核融合照射配位決定方法、核融合照射配位決定装置、及び核融合装置 |
EP10806333.0A EP2463863A4 (en) | 2009-08-06 | 2010-07-20 | METHOD FOR DETERMINING NUCLEAR FUSION IRRADIATION COORDINATES, DEVICE FOR DETERMINING NUCLEAR FUSION IRRADIATION COORDINATES, AND NUCLEAR FUSION DEVICE |
US14/948,495 US9672944B2 (en) | 2009-08-06 | 2015-11-23 | Method of determining nuclear fusion irradiation coordinates, device for determining nuclear fusion irradiation coordinates, and nuclear fusion device |
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US20050129159A1 (en) * | 1999-04-29 | 2005-06-16 | Condensate Energy Llc | Method and apparatus for compressing a bose-einstein condensate of atoms |
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CN101364450B (zh) | 2008-07-01 | 2012-06-27 | 上海大学 | 一种基于声空化效应实现核聚变反应的方法及其装置 |
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2010
- 2010-07-20 JP JP2011525844A patent/JP5669106B2/ja not_active Expired - Fee Related
- 2010-07-20 US US13/388,500 patent/US9230694B2/en not_active Expired - Fee Related
- 2010-07-20 CN CN201080034854.1A patent/CN102473463B/zh not_active Expired - Fee Related
- 2010-07-20 EP EP10806333.0A patent/EP2463863A4/en not_active Withdrawn
- 2010-07-20 WO PCT/JP2010/062178 patent/WO2011016333A1/ja active Application Filing
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2015
- 2015-11-23 US US14/948,495 patent/US9672944B2/en not_active Expired - Fee Related
Non-Patent Citations (4)
Title |
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KENTARO MIYAZAWA ET AL.: "Heavy Ion Beam Illumination Nonuniformity in Inertial Confinement Fusion", THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN PLASMA SCIENCE AND TECHNOLOGY KENKYUKAI SHIRYO, 2006, pages 1 - 18, XP008151358 * |
MASAKATSU MURAKAMI: "Design of a conic irradiation system for laser fusion", FUSION ENGINEERING AND DESIGN, vol. 44, 1999, pages 111 - 115, XP004161724 * |
S.G.GARANIN ET AL.: "Formation of the uniform irradiation of a target in high-power laser facilities", QUANTUM ELECTRONICS, vol. 34, no. 5, May 2004 (2004-05-01), pages 427 - 446, XP008151345 * |
See also references of EP2463863A4 * |
Also Published As
Publication number | Publication date |
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US20160104547A1 (en) | 2016-04-14 |
US9672944B2 (en) | 2017-06-06 |
JPWO2011016333A1 (ja) | 2013-01-10 |
US9230694B2 (en) | 2016-01-05 |
JP5669106B2 (ja) | 2015-02-12 |
EP2463863A4 (en) | 2016-05-11 |
EP2463863A1 (en) | 2012-06-13 |
US20120155590A1 (en) | 2012-06-21 |
CN102473463B (zh) | 2015-07-08 |
CN102473463A (zh) | 2012-05-23 |
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