CN108877960A - ICF freezes target assembly and ICF shielding case opening speed best practice - Google Patents
ICF freezes target assembly and ICF shielding case opening speed best practice Download PDFInfo
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- CN108877960A CN108877960A CN201710337554.4A CN201710337554A CN108877960A CN 108877960 A CN108877960 A CN 108877960A CN 201710337554 A CN201710337554 A CN 201710337554A CN 108877960 A CN108877960 A CN 108877960A
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- heat radiation
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- target assembly
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21B—FUSION REACTORS
- G21B1/00—Thermonuclear fusion reactors
- G21B1/11—Details
- G21B1/19—Targets for producing thermonuclear fusion reactions, e.g. pellets for irradiation by laser or charged particle beams
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- High Energy & Nuclear Physics (AREA)
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Abstract
The invention discloses a kind of ICF freezing target assembly and ICF shielding case opening speed best practices, it includes heat radiation screening cover that the ICF, which freezes target assembly, it is vacuum area in the heat radiation screening cover, thermal machine structure is provided in vacuum area, the outside up and down of thermal machine structure is each provided with a cold ring, thermal machine structure inner close fitting has golden chamber, gold is intracavitary to be filled with filling gas, the center of golden chamber is fixed with freezing pellet by support membrane, heat radiation screening cover is made of dismountable two parts, which is connected by shielding case connection structure.The ICF shielding case opening speed best practice, includes the following steps：Determine the radiation temperature of heat radiation screening cover；Model is established according to radiation temperature and specific cryogenic target situation；Determine heat radiation screening cover unfolding mode；Different shielding case opening speeds, the opening speed optimized and corresponding time are provided.
Description
Technical field
The invention belongs to inertial confinement fusions（ICF）Target spot fire field, and in particular to a kind of ICF freezing target assembly and ICF
Shielding case opening speed best practice.
Background technique
In inertial confinement fusion (ICF), cryogenic target has higher initial fuel density and the pre- heat-sensing of lower shock wave
Characteristic, can reduce compression pellet required for energy, on year-on-year basis under the conditions of neutron yield of the cryogenic target in thermonuclear fusion than
Non-frozen target significantly increases, and therefore, cryogenic target has become the preferred target type for realizing ICF igniting in the world.In order to inhibit auspicious
The growth of benefit-Taylor instability, deuterium tritium (DT) layer thickness uniformity has to be larger than 99% and inside surface roughness in cryogenic target
Root mean square is less than 1 μm, corresponds to surface temperature difference less than 0.1mK.Its driving source can be laser and the particle beams, and recent years
With laser technology, especially ultrashort chirped pulse amplification technique (Chirped PulseAmplification, abbreviation CPA)
It proposes and mature, the output intensity of laser is made to have obtained great promotion, therefore, most common driving source or laser,
It and is the nd glass laser of short wavelength.
For the mode of Laser Driven.ICF is realized by the spherical implosion of pellet, first before above process progress
First to open the heat radiation screening cover for weakening radiation.Shielding case is opened, and external environment radiation is directly projected into black chamber, to black chamber
Inside heating dramatically increases, and radiation intensity and black intracavitary heat convection increase, and the temperature field disturbance of pellet is exacerbated, for point
Fiery process influences very big.
It is original high by experimental test procedures cost, need to carry out different experiments for different structures, and
Due to the uncertainty of igniting, cause the probability of failure larger.
According to the inventor's study, although the opening speed of very little, pellet surface temperature is very slow in initial stage rising,
Fully open that the time required for shielding case is longer simultaneously, therefore there are optimal opening speeds.
Summary of the invention
It is an object of the invention to be directed to present shielding case opening speed and time uncertain status, one kind is provided
ICF freezing target assembly and ICF shielding case opening speed best practice, method of the invention illustrate identical freezing target size knot
Structure, the optimal opening speed of obtained cryogenic target be it is the same, it is unrelated with radiation temperature etc..
ICF freezes target assembly, specifically includes heat radiation screening cover 1, is vacuum area 3, vacuum in the heat radiation screening cover 1
Thermal machine structure 4 is provided in region 3, the outside up and down of thermal machine structure 4 is each provided with a cold ring 5, thermal machine
4 inner close fitting of structure has golden chamber 6, and filling gas 7 is filled in golden chamber 6, and the center of golden chamber 6 is fixed with cryogenic target by support membrane 8
Ball 9, heat radiation screening cover 1 are made of dismountable two parts, which is connected by shielding case connection structure 2.Heat engine
The upper and lower side of tool structure 4 is each provided with a laser light incident mouth 10, and storm wind window 12 is arranged on the outside of laser light incident mouth 10.
A kind of ICF shielding case opening speed best practice, includes the following steps：
1）Determine the radiation temperature of heat radiation screening cover 1；
2）Model is established according to radiation temperature and specific cryogenic target situation；
3）Determine 1 unfolding mode of heat radiation screening cover；
4）Different 1 opening speeds of shielding case, the opening speed optimized and corresponding time are provided.
The beneficial effects of the present invention are：The pellet retention time can be maximized, as igniting it is accurate according to and provide most
The window time changed greatly, effectively improves ignition success rate.It is original high by experimental test procedures cost, using the method,
Disposable successful probability can be improved, greatly save cost and improve success rate.Method of the invention illustrates identical cryogenic target
Dimensional structure, the optimal opening speed of obtained cryogenic target be it is the same, it is unrelated with radiation temperature etc., therefore the increase and decrease of part-structure
It will not affect that optimization opening speed, only will affect the retention time, part-structure increase and decrease mentions after size to determine in experiment for this
Great convenience is supplied.
Detailed description of the invention
Fig. 1 is that ICF freezes target assembly.
Fig. 2 is the ICF freezing target assembly that storm wind window is added.
Fig. 3 is freezing pellet cross-sectional view.
Specific embodiment
The present invention is made further instructions below in conjunction with drawings and examples.
If opening speed is 0.05m/s, initial shielding case temperature is 100K, keeps shielding case to open, the target after 0.185s
The ball temperature difference rises 0.1mk, this is the very big problem that igniting faces.
With reference to Fig. 1,2,3, of the invention is applied to ICF device, which includes heat radiation screening cover 1, shielding case connection
Structure 2, vacuum area 3, thermal machine structure 4, cold ring 5, golden chamber 6, filling gas 7, support membrane 8, pellet 9, laser light incident mouth
（LEH）10, storm wind window 11, wherein pellet 9 includes shell 12, fuel ice sheet 13, fuel gas 14.
The present invention is the best practice of ICF shielding case opening time.It is divided into following steps：
Step 1：Determine the radiation temperature of heat radiation screening cover；
Step 2：Model is established according to radiation temperature and specific cryogenic target situation；
Step 3：Determine heat radiation screening cover unfolding mode；
Step 4：Different shielding case opening speeds, the opening speed optimized and corresponding time are provided.
Embodiment one：With reference to Fig. 1, the golden chamber 6 for accommodating freezing pellet 9 is located in thermal machine structure 4, laser light incident mouth
（LEH）10 be the window of laser light incident when lighting a fire, and golden 6 internal diameter of chamber is 5.44mm, internal height 10mm, with a thickness of 10 μm.Outside golden chamber 6
Side is thermal machine structure 4 made of raffinal, and freezing 9 outermost shell of pellet, 12 material is hydrocarbon polymer, cryogenic target
9 outer diameter of ball is 1.16mm, and intermediate fuel ice sheet 13 is the DT ice sheet of 63 μ m-thicks, and most fuel gas 14 is DT gas.Cryogenic target
Ball 9 is about that the support membrane 7 that 0.1 μm of material is polymer thin film is supported on the center of structure by thickness.Outside heat radiation screening
It is vacuum area 3 between cover 1 and thermal machine structure 4, heat radiation screening cover 1 consists of two parts, and is connected with connection structure 2.
Step 1：The temperature of heat radiation screening cover 1 is 100K under the operating condition；
Step 2：External environment radiation temperature is 300K, ICF structure such as Fig. 1；
Step 3：1 unfolding mode of heat radiation screening cover is the disconnection of connection structure 2, and heat radiation screening cover 1 is at the uniform velocity beaten in parallel to two sides
It opens；
Step 4：With opening speed 0.01m/s, calculating fully opens the temperature difference in the freezing pellet 9 of heat radiation screening cover 1 and rises to
Time needed for 0.1mK；
Step 5：Increase opening speed, above step is repeated, until finding the corresponding optimal opening speed of retention time longest；
Step 6：Under this operating condition, optimal opening speed is obtained between 1-3m/s.
Embodiment two：With reference to Fig. 1, the golden chamber 6 for accommodating freezing pellet 9 is located in thermal machine structure 4, laser light incident mouth（LEH）
10 be the window of laser light incident when lighting a fire, and golden 6 internal diameter of chamber is 5.44mm, internal height 10mm, with a thickness of 10 μm.It is on the outside of golden chamber 6
Thermal machine structure 4 made of raffinal, freezing 9 outermost shell of pellet, 12 material are hydrocarbon polymer, are freezed outside pellet 9
Diameter is 1.16mm, and intermediate fuel ice sheet 13 is the DT ice sheet of 63 μ m-thicks, and most fuel gas 14 is DT gas.Freeze pellet 9 by
Thickness is about that the support membrane 7 that 0.1 μm of material is polymer thin film is supported on the center of structure.Outside heat radiation screening cover 1 with
It is vacuum between thermal machine structure 4, heat radiation screening cover 1 consists of two parts, and is connected with connection structure 2.
Step 1：The temperature of heat radiation screening cover is 100K under the operating condition；
Step 2：External environment radiation temperature is 200K, ICF structure such as Fig. 1；
Step 3：1 unfolding mode of heat radiation screening cover is the disconnection of connection structure 2, and heat radiation screening cover 1 is at the uniform velocity beaten in parallel to two sides
It opens；
Step 4：With opening speed 0.01m/s, calculating fully opens the temperature difference in the freezing pellet 9 of heat radiation screening cover 1 and rises to
Time needed for 0.1mK；
Step 5：Increase opening speed, above step is repeated, until finding the corresponding optimal opening speed of retention time longest；
Step 6：Under this operating condition, optimal opening speed is obtained between 1-3m/s.
Embodiment three：With reference to Fig. 2, the golden chamber 6 for accommodating freezing pellet 9 is located in thermal machine structure 4, laser light incident mouth（LEH）
10 be the window of laser light incident when lighting a fire, absorptivity 0.9, laser light incident mouth（LEH）There is storm wind window 11 outside 10, absorptivity is
0.9, golden 6 internal diameter of chamber is 5.44mm, internal height 10mm, with a thickness of 10 μm.It is heat engine made of raffinal on the outside of golden chamber 6
Tool structure 4, freezing 9 outermost shell of pellet, 12 material are hydrocarbon polymer, and freezing 9 outer diameter of pellet is 1.16mm, intermediate fuel
Ice sheet 13 is the DT ice sheet of 63 μ m-thicks, and most fuel gas 14 is DT gas.It is about that 0.1 μm of material is that pellet 9, which is freezed, by thickness
The support membrane 7 of polymer thin film is supported on the center of structure.It is between outside heat radiation screening cover 1 and thermal machine structure 4
Vacuum, heat radiation screening cover 1 consist of two parts, and are connected with connection structure 2.
Step 1：The temperature of heat radiation screening cover is 100K under the operating condition；
Step 2：External environment radiation temperature is 300K, ICF structure such as Fig. 1；
Step 3：1 unfolding mode of heat radiation screening cover is the disconnection of connection structure 2, and heat radiation screening cover 1 is at the uniform velocity beaten in parallel to two sides
It opens；
Step 4：With opening speed 0.01m/s, calculating fully opens the temperature difference in the freezing pellet 9 of heat radiation screening cover 1 and rises to
Time needed for 0.1mK；
Step 5：Increase opening speed, above step is repeated, until finding the corresponding optimal opening speed of retention time longest；
Step 6：Under this operating condition, optimal opening speed is obtained between 1-3m/s, but the retention time significantly increases.
Although illustrating the present invention only in conjunction with specific embodiment, however, it will be apparent that the present invention is not so limited, and
And if it includes all technically equivalent ones of described device and their compositions --- they fall into of the invention
In range.
Claims (8)
1.ICF freezes target assembly, which is characterized in that including heat radiation screening cover（1）, the heat radiation screening cover（1）Interior is vacuum
Region（3）, vacuum area（3）Inside it is provided with thermal machine structure（4）, thermal machine structure（4）Up and down outside be each provided with
One cold ring（5）, thermal machine structure（4）Inner close fitting has golden chamber（6）, golden chamber（6）It is interior to be filled with filling gas（7）, golden chamber（6）
Center pass through support membrane（8）It is fixed with freezing pellet（9）, heat radiation screening cover（1）It is made of dismountable two parts, this two
Part passes through shielding case connection structure（2）It is connected.
2. ICF according to claim 1 freezes target assembly, which is characterized in that thermal machine structure（4）Upper and lower side respectively set
It is equipped with a laser light incident mouth（10）, laser light incident mouth（10）Storm wind window is arranged in outside（12）.
3. ICF according to claim 1 freezes target assembly, which is characterized in that freezing pellet（9）Including from outside to inside and according to
The shell of secondary setting（12）, fuel ice sheet（13）And fuel gas（14）.
4. ICF according to claim 3 freezes target assembly, which is characterized in that shell（12）It is made of hydrocarbon polymer.
5. ICF according to claim 3 freezes target assembly, which is characterized in that fuel ice sheet（13）For the DT of 50-70 μ m-thick
Ice sheet.
6. ICF according to claim 3 freezes target assembly, which is characterized in that fuel gas（14）It is DT gas.
7. ICF according to claim 1 freezes target assembly, which is characterized in that golden chamber（6）Internal diameter be 5-6mm, it is internal high
9-11mm is spent, with a thickness of 9-11 μm.
8.ICF shielding case opening speed best practice, which is characterized in that this method is based on described in any one of claims 1 to 7
ICF freeze target assembly, include the following steps：
1）Determine heat radiation screening cover（1）Radiation temperature；
2）ICF cryogenic target mounted cast is established according to actual device；
3）Determine heat radiation screening cover（1）Unfolding mode；
4）Different heat radiation screening covers are provided（1）Opening speed, the opening speed optimized and corresponding time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710337554.4A CN108877960A (en) | 2017-05-15 | 2017-05-15 | ICF freezes target assembly and ICF shielding case opening speed best practice |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710337554.4A CN108877960A (en) | 2017-05-15 | 2017-05-15 | ICF freezes target assembly and ICF shielding case opening speed best practice |
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| CN108877960A true CN108877960A (en) | 2018-11-23 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863285A (en) * | 2020-06-24 | 2020-10-30 | 中国工程物理研究院激光聚变研究中心 | Cryogenic target low-temperature adsorption inhibition device |
| CN113158520A (en) * | 2021-04-09 | 2021-07-23 | 西安交通大学 | Fuel ice layer interface tracking simulation method for freezing target system |
| CN113178266A (en) * | 2021-04-09 | 2021-07-27 | 西安交通大学 | ICF (intensive Care Filter) freezing target device containing directional infrared auxiliary heating |
| CN113176795A (en) * | 2021-04-09 | 2021-07-27 | 西安交通大学 | ICF device comprising annular infrared injection and temperature control method for preparing target pellet ice layer |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111863285A (en) * | 2020-06-24 | 2020-10-30 | 中国工程物理研究院激光聚变研究中心 | Cryogenic target low-temperature adsorption inhibition device |
| CN111863285B (en) * | 2020-06-24 | 2022-03-25 | 中国工程物理研究院激光聚变研究中心 | Cryogenic target low-temperature adsorption inhibition device |
| CN113158520A (en) * | 2021-04-09 | 2021-07-23 | 西安交通大学 | Fuel ice layer interface tracking simulation method for freezing target system |
| CN113178266A (en) * | 2021-04-09 | 2021-07-27 | 西安交通大学 | ICF (intensive Care Filter) freezing target device containing directional infrared auxiliary heating |
| CN113176795A (en) * | 2021-04-09 | 2021-07-27 | 西安交通大学 | ICF device comprising annular infrared injection and temperature control method for preparing target pellet ice layer |
| CN113158520B (en) * | 2021-04-09 | 2022-10-28 | 西安交通大学 | Fuel ice layer interface tracking simulation method for freezing target system |
| CN113178266B (en) * | 2021-04-09 | 2023-04-25 | 西安交通大学 | ICF freezing target device containing directional infrared auxiliary heating |
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