Method and device for efficiently adsorbing deuterium gas by accelerator neutron source titanium film

Abstract

The invention relates to the technical field of accelerator neutron source titanium film adsorption, in particular to a method and device for efficiently adsorbing deuterium gas through an accelerator neutron source titanium film. According to the technical scheme, the device comprises a vacuum adsorption chamber, a gas inlet pipeline used for introducing high-purity deuterium gas is installed on one side of the top of the vacuum adsorption chamber, a flow meter is installed on the gas inlet pipeline, a high-temperature heating system is installed on the inner wall of the bottom of the vacuum adsorption chamber, and a high-vacuum pumping unit is installed at the bottom of the vacuum adsorption chamber. The temperature, the flow and the pressure in the process of adsorbing the deuterium gas by the titanium film are accurately regulated and controlled, and the method comprises the following steps of: firstly performing high vacuum pumping in a sample treatment stage, and then heating and cooling at a specific temperature; the heating temperature, the deuterium gas flow and the chamber pressure are strictly controlled in the deuterium charging stage, and the adsorption efficiency and the adsorption capacity of the titanium film on the deuterium gas are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of accelerator neutron source titanium film adsorption, and in particular to a method and a device for efficiently adsorbing deuterium gas on an accelerator neutron source titanium film. Background Art

[0002] Deuterium (D2) is a molecular form of hydrogen isotope and has broad application prospects, especially in the fields of accelerator neutron source, nuclear fusion research, nuclear reactors, deuterium labeling technology, deuteration reaction, etc. Deuterium, as an isotope of hydrogen, has higher quality and characteristics and can effectively participate in high-energy reactions such as neutron production and nuclear fusion. The application of deuterium adsorption technology in accelerator neutron source is mainly used for deuterium ion beam bombarding deuterium target to produce neutrons. Deuterium target uses deuterium adsorption material as target material, and accelerates deuterium ions to bombard deuterium target by accelerator to produce neutrons. Therefore, it is of great significance to study and develop methods that can efficiently adsorb deuterium under normal conditions. Titanium and its alloys have been widely used as adsorption materials in hydrogen storage. Titanium has a strong hydrogen adsorption capacity, and a titanium hydride film with a certain adsorption capacity can be formed on the surface of titanium-based materials. These characteristics make titanium materials an important research object in the field of hydrogen and deuterium adsorption. Titanium membrane can adsorb deuterium at a relatively low temperature, and has a large adsorption capacity and good thermal stability.

[0003] In the process of deuterium adsorption on the titanium film of the accelerator neutron source, temperature, flow rate and pressure are three key parameters, which have an important influence on the deuterium adsorption performance of the titanium film. Reasonable adjustment of these parameters can significantly improve the adsorption efficiency and adsorption capacity of the titanium film, and optimize the adsorption process. By adjusting these parameters, the adsorption process can be optimized and the adsorption capacity of the titanium film for deuterium can be improved. The appropriate temperature range can enhance the adsorption effect, the reasonable deuterium flow rate can ensure sufficient contact time, and the appropriate pressure can help increase the concentration of deuterium molecules on the surface of the titanium film. In practical applications, it is necessary to optimize these parameters according to specific needs and combined with experimental conditions to achieve efficient adsorption of deuterium by the titanium film.

[0004] Therefore, the present application proposes a method and device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source. Summary of the invention

[0005] The purpose of the present invention is to address the problem in the background technology that titanium film has poor adsorption capacity for deuterium gas, and to propose a method and device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source.

[0006] In a first aspect, the present application provides a device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source, comprising:

[0007] A vacuum adsorption chamber, wherein a gas inlet pipe for introducing high-purity deuterium gas is installed on one side of the top of the vacuum adsorption chamber, a flow meter is installed on the gas inlet pipe, a high-temperature heating system is installed on the inner wall of the bottom of the vacuum adsorption chamber, and a high-vacuum exhaust unit is installed at the bottom of the vacuum adsorption chamber;

[0008] An infrared camera temperature monitoring system installed on the top of the vacuum adsorption chamber for observing the inside of the vacuum adsorption chamber;

[0009] The chamber pressure monitoring system is installed on the top of the vacuum adsorption chamber to observe the pressure of the vacuum adsorption chamber.

[0010] Optionally, the high temperature heating system is a high temperature heating table.

[0011] Optionally, the infrared camera temperature monitoring system includes a glass observation window installed on the top of the vacuum adsorption chamber, and the top of the vacuum adsorption chamber is installed with an infrared camera located above the glass observation window.

[0012] Optionally, the chamber pressure monitoring system includes a vacuum gauge installed on the top of the vacuum adsorption chamber.

[0013] Optionally, the high vacuum pumping unit includes a vacuum pumping system connected to the vacuum adsorption chamber, the vacuum pumping system includes a molecular pump, the molecular pump is connected to a mechanical pump, the vacuum pumping system is connected to the molecular pump, and the molecular pump is connected to the mechanical pump.

[0014] Optionally, the vacuum adsorption chamber is a stainless steel cube chamber with a size of 400mm×400mm×400mm, and the outer wall of the vacuum adsorption chamber is provided with cooling water channel ribs.

[0015] In a second aspect, the present application provides a method for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source, which is applied to the device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source as described in the first aspect, and comprises the following steps:

[0016] S1. Place the sample to be prepared into titanium film on the high-temperature heating table of the vacuum adsorption chamber, and turn on the high vacuum pumping unit to provide a high vacuum environment for the vacuum adsorption chamber;

[0017] S2, when the vacuum inside the vacuum adsorption chamber reaches 10 -5 After the Pa level, the high-temperature heating stage was turned on to heat the sample surface to 500°C and keep it warm for 30 minutes. After the insulation was completed, the high-temperature heating device was turned off and the titanium film sample was allowed to cool to room temperature.

[0018] S3. After reaching room temperature, turn off the high vacuum pumping unit, then turn on the high temperature heating stage and set the temperature to 300-600°C, then turn on the flow meter to fill the vacuum adsorption chamber with deuterium gas;

[0019] S4. After the pressure in the vacuum adsorption chamber reaches 4E+4-1.5E+5Pa, turn off the deuterium gas supply, wait for the sample temperature to reach 300℃-600℃, turn off the high-temperature heating stage, and then let the sample cool naturally to room temperature to complete the titanium film adsorption of deuterium gas experiment.

[0020] Optionally, in step S3, when deuterium gas is charged, the flow meter (1) is set to a flow rate of 500-2000 sccm.

[0021] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:

[0022] The vacuum adsorption chamber can be evacuated to 10 -5 The high vacuum degree of Pa level effectively prevents the titanium film from oxidizing and ensures the good deuterium absorption performance of the titanium film. The infrared camera temperature monitoring system can observe the surface temperature of the titanium film sample in real time, with a measurement range of 0-800℃ and an accuracy of ±1%, and feed back the temperature to the high-temperature heating device in real time to achieve precise temperature control, providing guarantee for the titanium film to adsorb deuterium at the appropriate temperature.

[0023] The chamber pressure monitoring system can monitor the gas pressure inside the vacuum adsorption chamber in real time, with a pressure monitoring range of 5×10 -6 Pa-1×10 5 Pa, with an accuracy of ±30%, it is easy to adjust the deuterium filling pressure, explore the best deuterium filling pressure conditions, and optimize the adsorption process. The high temperature heating system (high temperature heating table) can provide a high temperature environment from room temperature to 650°C, with a heating rate of 10°C / min, which can provide different high temperature conditions for the titanium membrane to adsorb deuterium gas and improve the adsorption efficiency.

[0024] The present invention precisely controls the temperature, flow rate and pressure during the deuterium adsorption process of the titanium membrane, including first evacuating a high vacuum and then heating and cooling at a specific temperature during the sample processing stage; and strictly controlling the heating temperature, deuterium flow rate and chamber pressure during the deuterium charging stage, thereby significantly improving the adsorption efficiency and capacity of the titanium membrane for deuterium. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The schematic diagram is a structural diagram of a device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source;

[0026] Figure 2 The present invention is a flow chart of a method for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source.

[0027] Figure numerals: 1. flow meter; 2. vacuum adsorption chamber; 3. infrared camera; 4. glass observation window; 5. high temperature heating table; 6. vacuum gauge; 7. vacuum exhaust system; 8. molecular pump; 9. mechanical pump. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Example

[0030] First, as Figure 1 As shown, the present application provides a device for efficiently adsorbing deuterium gas by a titanium film of an accelerator neutron source, including a vacuum adsorption chamber 2. The vacuum adsorption chamber 2 is a stainless steel cube chamber with a size of 400mm×400mm×400mm. The outer wall of the vacuum adsorption chamber 2 is close to the sealing area to prevent the sealing ring from aging, hardening or melting due to high temperature, thereby causing vacuum leakage, and is provided with cooling water channel ribs;

[0031] Among them, an air inlet pipe for introducing high-purity deuterium gas is installed on one side of the top of the vacuum adsorption chamber 2, and a flow meter 1 is installed on the air inlet pipe. The flow meter 1 is connected to the deuterium gas cylinder to fill the vacuum adsorption chamber 2 with deuterium gas; the flow meter 1 is used to control the rate of deuterium gas filling to provide a stable gas input for the vacuum adsorption chamber 2. By adjusting the flow meter 1, 0-2000sccm and an accuracy of ±20sccm deuterium gas delivery can be achieved.

[0032] In addition, a high temperature heating system is installed on the inner wall of the bottom of the vacuum adsorption chamber 2, and the high temperature heating system is a high temperature heating table 5; the high temperature heating system is mainly used to heat the titanium film sample at high temperature, and provides different temperature conditions for the titanium film sample to adsorb deuterium gas to improve the adsorption efficiency, and can provide a high temperature environment from room temperature to 650°C for the sample, and the heating rate can achieve 10°C / min

[0033] In this embodiment, a high vacuum pumping unit is installed at the bottom of the vacuum adsorption chamber 2, and the high vacuum pumping unit includes a vacuum pumping system 7 connected to the vacuum adsorption chamber 2, and the vacuum pumping system 7 includes a molecular pump 8, and the molecular pump 8 is connected to a mechanical pump 9. The vacuum pumping system 7 is connected to the molecular pump 8, and the molecular pump 8 is connected to the mechanical pump 9; the molecular pumping speed is 200L / s, and the mechanical pumping speed is 20L / s. The high vacuum pumping unit can pump the vacuum degree in the vacuum adsorption chamber 2 to 10 -5 Pa level, providing a high vacuum environment for the deuterium absorbing titanium film to avoid oxidation of the titanium film and affect the deuterium absorbing performance.

[0034] It is worth mentioning that an infrared camera temperature monitoring system for observing the inside of the vacuum adsorption chamber 2 is installed on the top of the vacuum adsorption chamber 2; the infrared camera temperature monitoring system includes a glass observation window 4 installed on the top of the vacuum adsorption chamber 2, and an infrared camera 3 located above the glass observation window 4 is installed on the top of the vacuum adsorption chamber 2; the infrared camera temperature monitoring system can observe the surface temperature of the titanium film sample in real time, the infrared camera temperature monitoring system is located directly above the deuterium-absorbing titanium film, and the sample surface adsorption temperature can be observed in real time through the glass window 4, the measurement range: 0-800℃, accuracy: ±1%, and the detected temperature can be fed back to the high-temperature heating device in real time to control whether the temperature conditions are met.

[0035] A chamber pressure monitoring system is installed on the top of the vacuum adsorption chamber 2 to observe the pressure of the vacuum adsorption chamber 2. The chamber pressure monitoring system includes a vacuum gauge 6 installed on the top of the vacuum adsorption chamber 2. The chamber pressure monitoring system can observe the pressure of deuterium gas filling into the chamber in real time, and provide pressure conditions for the titanium film sample to adsorb deuterium gas. The chamber pressure monitoring system can monitor the gas pressure inside the vacuum adsorption chamber 2 in real time, and explore the optimal deuterium filling pressure conditions for titanium film deuterium adsorption by regulating the deuterium filling pressure in the vacuum adsorption chamber 2. Pressure monitoring range: 5×10 -6 Pa-1×10 5 Pa, accuracy: ±30%

[0036] In a second aspect, the present application provides a method for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source, which is applied to the device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source as described in the first aspect, and comprises the following steps:

[0037] S1, placing the sample to be prepared as a titanium film on the high-temperature heating table of the vacuum adsorption chamber 2, and turning on the high vacuum pumping unit to provide a high vacuum environment for the vacuum adsorption chamber 2;

[0038] S2, when the vacuum inside the vacuum adsorption chamber 2 reaches 10 -5 After the Pa level, the high temperature heating stage 5 is turned on to heat the sample surface to 500°C and keep the temperature for 30 minutes. After the temperature is kept, the high temperature heating device is turned off and the titanium film sample is cooled to room temperature.

[0039] S3, after reaching room temperature, turn off the high vacuum pumping unit, then turn on the high temperature heating stage 5, and set the temperature to 300-600°C, then turn on the flow meter 1 to fill the vacuum adsorption chamber 2 with deuterium gas, and set the flow rate of the flow meter 1 to 500-2000sccm when filling with deuterium gas;

[0040] S4. After the pressure of the vacuum adsorption chamber 2 reaches 4E+4-1.5E+5Pa, the deuterium gas supply is turned off, and after the sample temperature reaches 300°C-600°C, the high-temperature heating stage 5 is turned off, and the sample is then allowed to cool naturally to room temperature, completing the experiment of titanium film adsorbing deuterium gas.

[0041] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source, characterized in that: include: A vacuum adsorption chamber (2), wherein a gas inlet pipe for introducing high-purity deuterium gas is installed on one side of the top of the vacuum adsorption chamber (2), a flow meter (1) is installed on the gas inlet pipe, a high-temperature heating system is installed on the inner wall of the bottom of the vacuum adsorption chamber (2), and a high-vacuum exhaust unit is installed at the bottom of the vacuum adsorption chamber (2); An infrared camera temperature monitoring system installed on the top of the vacuum adsorption chamber (2) for observing the inside of the vacuum adsorption chamber (2); A chamber pressure monitoring system is installed on the top of the vacuum adsorption chamber (2) and is used to observe the pressure of the vacuum adsorption chamber (2).

2. The device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source according to claim 1, characterized in that: The high temperature heating system is a high temperature heating table (5).

3. The device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source according to claim 1, characterized in that: The infrared camera temperature monitoring system comprises a glass observation window (4) installed on the top of the vacuum adsorption chamber (2), and an infrared camera (3) located above the glass observation window (4) is installed on the top of the vacuum adsorption chamber (2).

4. The device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source according to claim 1, characterized in that: The chamber pressure monitoring system comprises a vacuum gauge (6) installed on the top of the vacuum adsorption chamber (2).

5. The device for efficient deuterium adsorption by titanium film of accelerator neutron source according to claim 1, characterized in that: The high vacuum pumping unit comprises a vacuum pumping system (7) connected to the vacuum adsorption chamber (2), the vacuum pumping system (7) comprises a molecular pump (8), and the molecular pump (8) is connected to a mechanical pump (9).

6. The device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source according to claim 1, characterized in that: The vacuum adsorption chamber (2) is a stainless steel cubic chamber with a size of 400 mm×400 mm×400 mm. The outer wall of the vacuum adsorption chamber (2) is provided with cooling water channel ribs.

7. A method for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source, applied to the device for efficiently adsorbing deuterium gas on a titanium film of an accelerator neutron source as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Place the sample on which the titanium film is to be prepared on the high-temperature heating table of the vacuum adsorption chamber (2), and turn on the high vacuum pumping unit to provide a high vacuum environment for the vacuum adsorption chamber (2); S2, when the vacuum inside the vacuum adsorption chamber (2) reaches 10 -5 After reaching the Pa level, the high temperature heating stage (5) is turned on to heat the sample surface to 500°C and keep the temperature for 30 minutes. After the temperature is kept at this level, the high temperature heating device is turned off and the titanium film sample is allowed to cool to room temperature. S3. After reaching room temperature, turn off the high vacuum pumping unit, then turn on the high temperature heating table (5), set the temperature to 300-600°C, and then turn on the flow meter (1) to fill the vacuum adsorption chamber (2) with deuterium gas; S4. After the pressure of the vacuum adsorption chamber (2) reaches 4E+4-1.5E+5Pa, the deuterium gas supply is turned off, and after the sample temperature reaches 300°C-600°C, the high-temperature heating stage (5) is turned off. The sample is then allowed to cool naturally to room temperature, thus completing the titanium film adsorption of deuterium gas experiment.

8. The method for efficiently adsorbing deuterium gas by titanium film for accelerator neutron source according to claim 7, characterized in that: In the step S3, the flow meter (1) is set to a flow rate of 500-2000 sccm when charging deuterium gas.

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