Accelerator electron beam window

Abstract

The utility model relates to an electron beam window of an accelerator, which is of a composite film structure and comprises a titanium foil base layer and a graphene film layer, the thickness of the titanium foil base layer ranges from 10 micrometers to 15 micrometers, the thickness of the graphene film layer ranges from 1 nm to 50 nm, and the graphene film layer adheres to and grows on the lower surface of the titanium foil base layer. According to the electron beam window of the accelerator, the graphene film layer adheres to and grows on the surface of the titanium foil base layer to form a composite film structure, so that the electron beam window not only has excellent mechanical strength and heat-conducting property, but also is simple in preparation process and low in cost. Therefore, the accelerator has a wide application prospect in the technical field of accelerators, and particularly has important application value in the fields of high-energy physical research, medical diagnosis and the like.

Description

Technical Field

[0001] The utility model relates to an electron accelerator, and more specifically to an accelerator electron beam window. Background Art

[0002] The known electron accelerator includes a cylinder, an electron gun, an accelerating tube and an electron beam window, wherein the accelerating tube is installed in the cylinder, the electron gun is installed at the top of the accelerating tube, and the electron beam window is installed on the cylinder at the bottom. The electron beam generated by the electron gun is accelerated when passing through the accelerating tube, and then passes through the electron beam window to irradiate the product. The function of the electron beam window is to allow the high-speed electron beam to be transmitted from the vacuum area of ​​the accelerating tube to the external environment while maintaining isolation between the vacuum and the atmosphere.

[0003] During the operation of the accelerator, the electron beam window, as a key component, needs to withstand the bombardment of high-energy electron beams and maintain good heat dissipation performance and mechanical strength.

[0004] The commonly used electron beam window is a titanium window with a thickness of 20 to 30 μm. Although the titanium window has certain strength and heat dissipation, under the bombardment of high-power and high-energy electron beams, the temperature rises very quickly and the life span is rapidly shortened. The thickness of the titanium window is reduced, and the mechanical strength drops sharply, and it is easy to break. Therefore, improving this situation is a current situation that needs to be urgently solved in the accelerator. Utility Model Content

[0005] In order to solve the problems of short service life of titanium windows in the above-mentioned prior art, the utility model provides an accelerator electron beam window.

[0006] According to the accelerator electron beam window of the utility model, it is a composite membrane structure, which includes a titanium foil base layer and a graphene film layer, wherein the thickness of the titanium foil base layer is between 10μm-15μm, the thickness of the graphene film layer is 1nm to 50nm, and the graphene film layer is attached and grown on the lower surface of the titanium foil base layer.

[0007] Preferably, the graphene film layer comprises a plurality of graphene monolayers deposited layer by layer on a titanium foil base layer.

[0008] Preferably, the graphene film layer is a uniform and dense graphene film layer directly deposited on the titanium foil base layer.

[0009] Preferably, the thickness of the graphene film layer is 1-10 nm.

[0010] Preferably, the thickness of the graphene film layer is 5-10 nm.

[0011] Preferably, the thickness of the titanium foil base layer is 10 μm.

[0012] Preferably, the titanium foil base layer is a titanium alloy thin layer.

[0013] Preferably, the titanium foil base layer is a titanium aluminum vanadium alloy thin layer.

[0014] Preferably, the composite membrane structure is circular, square or strip-shaped.

[0015] According to the accelerator electron beam window of the utility model, the graphene film layer is attached and grown on the surface of the titanium foil base to form a composite film structure, which not only has excellent mechanical strength and thermal conductivity, but also has a simple preparation process and low cost. Therefore, it has a wide range of application prospects in the field of accelerator technology, especially in the fields of high-energy physics research, medical diagnosis, etc. It has important application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The invention is an accelerator electron beam window according to a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present utility model are given below in conjunction with the accompanying drawings and described in detail.

[0018] like Figure 1 As shown, the accelerator electron beam window according to a preferred embodiment of the utility model is a composite membrane structure 1, which includes a titanium foil base layer 11 and a graphene film layer 12, wherein the graphene film layer 12 is attached and grown on the lower surface of the titanium foil base layer 11 (i.e., the exit surface of the electron beam 3).

[0019] The composite membrane structure 1 can be in various shapes such as round, square or long strip, and fixedly mounted on the cylinder. It should be understood that the various shapes are to meet the requirements of cylinders of different electron accelerators. The specific installation and fixing method is the same as the prior art and will not be repeated here.

[0020] The titanium foil base layer 11 is a thin layer of titanium alloy, composed of titanium (Ti), aluminum (Al) and vanadium (V), such as Ti-6Al-4V. The thickness of the titanium foil base layer 11 is between 10 μm and 15 μm. In a preferred embodiment, the thickness of the titanium foil base layer 11 is 10 μm. It should be understood that the titanium foil base layer 11 has a high melting point and good thermal conductivity. When the electron beam 2 passes through, the active surface 11a of the titanium foil base layer 11 has less absorption of the electron beam 2.

[0021] The graphene film layer 12 includes a plurality of graphene monolayers deposited layer by layer on the titanium foil base layer 11. It should be understood that the growth of the graphene film layer 12 on the titanium foil base layer 11 can be achieved by a variety of methods, such as chemical vapor deposition or physical vapor deposition. Compared with the scheme of growing graphene on a copper foil substrate and then transferring the graphene film, directly depositing graphene on the titanium foil base layer 11 can form a uniform and dense graphene film layer 12 on the surface of the titanium foil base layer 11 and ensure good bonding between the graphene film layer 12 and the titanium foil base layer 11.

[0022] The thickness of the graphene film layer 12 is 1 nm to 50 nm. It should be understood that the thickness of a graphene monolayer is about 0.334 nm, and multiple graphene monolayers are generated layer by layer to form the graphene film layer 12. In a preferred embodiment, the thickness of the graphene film layer 12 is 10 nm.

[0023] The cooling system 3 arranged outside the electron beam window cools the graphene film layer 12 by strong wind, ensuring that the electron beam window will not be damaged due to overheating, while ensuring the stability and safety of the electron beam processing process.

[0024] In particular, graphene as a nanomaterial has excellent strength, low density and good thermal conductivity. Growing graphene on the surface of the titanium foil base layer 11 can not only significantly improve the mechanical properties of the titanium foil base layer 11, but also greatly improve the thermal conductivity of the composite membrane structure 1, which helps to quickly dissipate the heat generated during the bombardment of the electron beam 2.

[0025] Compared with the traditional titanium window with a thickness of 20 to 30 μm, the thickness of the composite membrane structure 1 of the utility model can be reduced to 10-15 μm. This is due to the high strength and high thermal conductivity of graphene. The attenuation of the electron beam 2 in the titanium foil base layer 11 is greatly reduced, so that the temperature rise is also significantly controlled, and its strength is not reduced, but improved.

[0026] The high thermal conductivity of the graphene film layer 12 enables the composite film structure 1 to quickly dissipate heat when it is bombarded by the electron beam 2, thereby avoiding heat accumulation on the window and making the temperature of the composite film structure 1 significantly lower than that of traditional titanium windows, further enhancing the strength of the composite film structure 1, reducing the sublimation of the titanium foil base layer 11, and significantly extending the life of the window.

[0027] The above is only a preferred embodiment of the utility model, and is not intended to limit the scope of the utility model. The above embodiments of the utility model can also be modified in various ways. That is, all simple, equivalent changes and modifications made according to the claims and the contents of the specification of the utility model application fall within the scope of protection of the claims of the utility model patent. The conventional technical contents are not described in detail in the utility model.

Claims

1. An accelerator electron beam window, characterized in that: The accelerator electron beam window is a composite membrane structure, which includes a titanium foil base layer and a graphene membrane layer, wherein the thickness of the titanium foil base layer is between 10μm and 15μm, the thickness of the graphene membrane layer is between 1nm and 50nm, and the graphene membrane layer is attached and grown on the lower surface of the titanium foil base layer.

2. The accelerator electron beam window according to claim 1, characterized in that: The graphene film layer includes a plurality of graphene monolayers deposited layer by layer on a titanium foil base layer.

3. The accelerator electron beam window according to claim 1, characterized in that: The graphene film layer is a uniform and dense graphene film layer directly deposited on the titanium foil base layer.

4. The accelerator electron beam window according to claim 1, characterized in that: The thickness of the graphene film layer is 1-10nm.

5. The accelerator electron beam window according to claim 4, characterized in that: The thickness of the graphene film layer is 5-10nm.

6. The accelerator electron beam window according to claim 1, characterized in that: The thickness of the titanium foil base layer is 10 μm.

7. The accelerator electron beam window according to claim 1, characterized in that: The titanium foil base layer is a thin layer of titanium alloy.

8. The accelerator electron beam window according to claim 7, characterized in that: The titanium foil base layer is a titanium-aluminum-vanadium alloy thin layer.

9. The accelerator electron beam window according to claim 1, characterized in that: The composite membrane structure is round, square or long strip.

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