CN114842986A - Evacuation flow washing device and method for ICF target pellets - Google Patents
Evacuation flow washing device and method for ICF target pellets Download PDFInfo
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- CN114842986A CN114842986A CN202210500813.1A CN202210500813A CN114842986A CN 114842986 A CN114842986 A CN 114842986A CN 202210500813 A CN202210500813 A CN 202210500813A CN 114842986 A CN114842986 A CN 114842986A
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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)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
An ICF target pill evacuation flow washing device and method, the apparatus includes the target pill, the target pill is connected with one end of the target pill gas-filled tube, the other end of the target pill gas-filled tube is connected with inlet of the target pill air extractor control valve, outlet of deuterium gas source control valve, the inlet of the target pill air extractor control valve is connected with outlet of deuterium gas source control valve, the outlet of the target pill air extractor control valve is connected with inlet of the target pill air extractor, the inlet of deuterium gas source control valve is connected with deuterium gas source outlet; in the method, an air extraction stage and an air inflation stage are adopted, wherein 1 time of air extraction and 1 time of air inflation are taken as an air evacuation flow washing process, and 5 times of air evacuation flow washing process are carried out, so that the content of impurity gas in the target pellet 1 is lower than 205ppm, and the required time is shortest; the invention can more conveniently control the concentration of impurity gas in the target pellet within an allowable range in a time-saving manner, thereby improving the success rate of ignition.
Description
Technical Field
The invention relates to the technical field of Inertial Confinement Fusion (ICF) target pellets, in particular to an evacuation flow washing device and method of ICF target pellets.
Background
Inertial confinement nuclear fusion (ICF) is a nuclear fusion technology, which uses laser shock wave to initiate nuclear fusion reaction, and is one of the main methods for realizing fusion ignition. In the experiment, the target pellet needs to be filled with high-purity deuterium gas to meet the fusion requirement of the freezing target.
In general, the concentration of impurity gases in the target pellet is required to be less than 205 ppm. In order to realize such a harsh concentration requirement and improve the ignition success rate of fusion, a complete evacuation flow washing method needs to be established. The traditional evacuation flow washing method (the inflation rate effect [ J ] in the ICF plane freezing target preparation) is to continuously evacuate the target pill to extremely low pressure and then fill deuterium gas, and the method is time-consuming and cannot effectively judge whether the content of impurity gas in a cavity meets the experimental requirements.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an evacuation flow washing device and method for ICF target pellets, which can more conveniently control the concentration of impurity gas in the target pellets within an allowable range in a time-saving manner, thereby improving the ignition success rate.
In order to achieve the purpose, the invention adopts the technical scheme that:
a target pill evacuating and washing device comprises a target pill 1, wherein the target pill 1 is connected with one end of a target pill inflation tube 2, the other end of the target pill inflation tube 2 is connected with an inlet of a target pill air extractor control valve 3 and an outlet of a deuterium gas source control valve 5, an inlet of the target pill air extractor control valve 3 is connected with an outlet of the deuterium gas source control valve 5, an outlet of the target pill air extractor control valve 3 is connected with an inlet of a target pill air extractor 4, and an inlet of the deuterium gas source control valve 5 is connected with an outlet of the deuterium gas source 6.
A method of evacuating a flow wash apparatus using a target pellet comprising
Air extraction stage: the control valve 3 of the target pill air extractor is opened, the control valve 5 of the deuterium gas source is closed, the target pill air extractor 4 is operated, the air extraction process is started, and when the pressure in the target pill is lower than the set intermediate pressure p mid,capsule When the target pill is exhausted, the control valve 3 of the target pill air extractor is closed, and the air extraction process is finished;
and (3) an inflation stage: and (3) opening the deuterium gas source control valve 5, closing the target pill air pump control valve 3, injecting the deuterium gas in the deuterium gas source 6 into the target pill 1 through the target pill inflation tube 2, and closing the deuterium gas source control valve 5 when the pressure in the target pill 1 reaches 99.9kPa to finish the inflation process.
5 times of evacuation flow washing process was carried out by using 1 time of evacuation and 1 time of inflation as evacuation flow washing process, in which the content of impurity gas in the target pellet 1 was less than 205ppm and the time required was the shortest.
The invention has the beneficial effects that: the method adopts a numerical simulation method to calculate the pressure in the target pill and the content change of impurity gas under different evacuation flow washing intermediate pressures, and provides a specific evacuation flow washing process of the ICF target pill.
Drawings
FIG. 1 is a schematic structural view of a target pill evacuation flow washing apparatus.
FIG. 2 is a graph of the pressure and residual air concentration changes in a target pellet during an evacuation flow wash.
FIG. 3 shows the time required for different target pellets to be pumped down to the intermediate pressure of the flow wash.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Referring to fig. 1, a target pill evacuating and washing device comprises a target pill 1, wherein the target pill 1 is connected with one end of a target pill inflation tube 2, the other end of the target pill inflation tube 2 is connected with an inlet of a target pill air extractor control valve 3 and an outlet of a deuterium gas source control valve 5, an inlet of the target pill air extractor control valve 3 is connected with an outlet of the deuterium gas source control valve 5, an outlet of the target pill air extractor control valve 3 is connected with an inlet of a target pill air extractor 4, and an inlet of the deuterium gas source control valve 5 is connected with an outlet of a deuterium gas source 6.
Taking an NIF target as an example, the outer diameter of the target pill 1 is 2.216mm, and the inner diameter is 1.95 mm; the inner diameter of the target pill gas-filled tube 2 is 0.01mm, and the length is 20 mm; the pressure of the deuterium gas source 6 is 100kPa, and the pressure of the target pill air extractor 4 is 100 Pa; the target pellet 1 was initially charged with 101.325kPa of air.
A method of evacuating a flow wash apparatus using a target pellet comprising
Air extraction stage: the control valve 3 of the target pill air extractor is opened, the control valve 5 of the deuterium gas source is closed, the target pill air extractor 4 is operated, the air extraction process is started, and when the pressure in the target pill is lower than the set intermediate pressure p mid,capsule When the target pill is exhausted, the control valve 3 of the target pill air extractor is closed, and the air extraction process is finished;
and (3) an inflation stage: and (3) opening the deuterium gas source control valve 5, closing the target pill air pump control valve 3, injecting the deuterium gas in the deuterium gas source 6 into the target pill 1 through the target pill inflation tube 2, and closing the deuterium gas source control valve 5 when the pressure in the target pill 1 reaches 99.9kPa to finish the inflation process.
Intermediate pressure p in target pill washing process mid,capsule The calculation of (2): respectively take p mid,capsule 10kPa, 14kPa, 18kPa, 22kPa and 26kPa, the pressure and residual air concentration in the target pellet 1 during the evacuation flow washing are plotted in fig. 2, in which the solid line is the pressure variation in the chamber of the target pellet 1, the dotted line is the residual air concentration variation in the chamber of the target pellet 1, and the dotted line is the residual air standard.
By integrating the results of FIG. 2 above, it can be seen that the total time required for the pump-down flow wash is a minimum of about 7.34 minutes for an intermediate pressure of 18kPa, with a pump-up time of 3.13 minutes and a pump-down time of 4.21 minutes, as can be seen from FIG. 2, a total of 5 pump-down and pump-up passes are required.
Claims (3)
1. A target pill evacuating and washing device comprises a target pill (1), and is characterized in that: the target pill (1) is connected with one end of a target pill inflation tube (2), the other end of the target pill inflation tube (2) is connected with the inlet of a target pill air extractor control valve (3) and the outlet of a deuterium gas source control valve (5), the inlet of the target pill air extractor control valve (3) is connected with the outlet of the deuterium gas source control valve (5), the outlet of the target pill air extractor control valve (3) is connected with the inlet of a target pill air extractor (4), and the inlet of the deuterium gas source control valve (5) is connected with the outlet of a deuterium gas source (6).
2. A method of evacuating a flow wash apparatus using target pellets as claimed in claim 1, comprising
Air extraction stage: the control valve (3) of the target pill air extractor is opened, the control valve (5) of the deuterium gas source is closed, the target pill air extractor (4) is operated, the air extraction process is started, and when the pressure in the target pill is lower than the set intermediate pressure p mid,capsule When the target pill is exhausted, the control valve (3) of the target pill air extractor is closed, and the air exhaust process is finished;
and (3) an inflation stage: and (3) opening the deuterium gas source control valve (5), closing the target pill air extractor control valve (3), injecting deuterium gas in the deuterium gas source (6) into the target pill (1) through the target pill air filling pipe (2), and closing the deuterium gas source control valve (5) when the pressure in the target pill (1) reaches 99.9kPa to finish the air filling process.
3. The method of claim 2, wherein: 5 times of evacuation flow washing process is carried out by taking 1 time of air suction and 1 time of air inflation as the evacuation flow washing process, and the content of impurity gas in the target pellet (1) is lower than 205ppm and the required time is shortest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210500813.1A CN114842986A (en) | 2022-05-10 | 2022-05-10 | Evacuation flow washing device and method for ICF target pellets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210500813.1A CN114842986A (en) | 2022-05-10 | 2022-05-10 | Evacuation flow washing device and method for ICF target pellets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114842986A true CN114842986A (en) | 2022-08-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210500813.1A Pending CN114842986A (en) | 2022-05-10 | 2022-05-10 | Evacuation flow washing device and method for ICF target pellets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114842986A (en) |
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2022
- 2022-05-10 CN CN202210500813.1A patent/CN114842986A/en active Pending
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