Beryllium window device with gas and water cooling protection

Abstract

The application discloses a beryllium window device with gas and water cooling protection, which is characterized by comprising a water cooling beryllium window and a gas beryllium window protection device; the gas beryllium window protection device comprises a Kapton film, two gas pipelines and a terminal flange; a fixed flange on the atmospheric side of the water cooling beryllium window is connected with the terminal flange, the Kapton film is installed in a knife edge of the fixed flange; two through holes are arranged on the side wall of the fixed flange and are respectively in sealed connection with the gas pipelines, one of the gas pipelines is used for connecting cooling air to cool beryllium sheets in the water cooling beryllium window, and the other gas pipeline is used for discharging gas to form air cooling circulation. On the basis of the water cooling beryllium window, a set of gas protection device is added, and the service life of the beryllium window can be prolonged by means of air cooling, and the harm of beryllium oxidation to the human body can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of synchrotron radiation technology and relates to a beryllium window device that combines gas and water cooling protection for use in synchrotron radiation beamlines under ultra-high vacuum environments. By using cooling water and helium, the beryllium window is protected from high loads and high heat at the HEPS fourth-generation light source, extending the beryllium window fatigue time and thus the equipment's service life. Background Technology

[0002] Beryllium, an atomic number 4, exhibits minimal absorption of high-energy synchrotron radiation, making it a preferred material for optical windows. Since synchrotron radiation beams typically operate in ultra-high vacuum environments, beryllium windows, constructed from welded beryllium, can achieve both vacuum isolation and high synchrotron radiation penetration. Although beryllium has relatively high thermal conductivity, the power density and intensity of synchrotron radiation far exceed its thermal efficiency. Traditional beryllium windows typically employ water cooling, circulating cooling water through a copper absorber to dissipate heat generated on the beryllium sheet into the absorber, which is then dissipated through the cooling water. Because light usually illuminates the center of the beryllium sheet, and synchrotron radiation is continuous, the temperature of the beryllium sheet rises rapidly, leading to oxidation on its surface. Beryllium oxide is a carcinogen with high toxicity; inhalation can cause chronic illnesses and endanger the safety of laboratory personnel. Furthermore, beryllium oxidation reduces surface uniformity, particularly negatively impacting the results of synchrotron radiation imaging experiments. More importantly, prolonged exposure to high temperatures can cause micropores to form on the surface of the beryllium plate, eventually leading to gas leakage and affecting the operation of the beamline station.

[0003] While the above cooling method can reduce the temperature of the beryllium window, it is inefficient and unsuitable for high power density experimental scenarios. Once the power density increases, the heat dissipation effect of the beryllium plate deteriorates, and oxidation will occur on the surface of the beryllium plate, which will not only endanger personal safety but also affect the stable operation of the beam. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention aims to provide a beryllium window device that combines gas and water cooling protection. The present invention mainly includes a water-cooled beryllium window assembly and a gas cooling assembly. The water-cooled beryllium window assembly includes an upstream loose flange, a stainless steel connecting pipe, a copper absorber, beryllium plates, and cooling water pipes; the gas cooling assembly includes a Kapton membrane, a sealing flange, and fixing bolts.

[0005] The technical solution of this invention is as follows: A beryllium window device that combines gas and water cooling protection is characterized by comprising a water-cooled beryllium window and a gas beryllium window protection device; the gas beryllium window protection device includes a Kapton membrane, two gas pipes, and an end flange; the fixed flange on the atmospheric side of the water-cooled beryllium window is connected to the end flange, and the Kapton membrane is installed in the knife edge of the fixed flange; the side wall of the fixed flange is provided with two through holes, which are respectively sealed and connected to one of the gas pipes, wherein one of the gas pipes is used to introduce cooling air to cool the beryllium plates in the water-cooled beryllium window, and the other gas pipe is used to discharge gas, forming an air cooling cycle.

[0006] Preferably, the fixed flange end face on the atmospheric side of the water-cooled beryllium window is provided with a threaded hole, and the end flange and the fixed flange are connected together by bolts.

[0007] Preferably, the fixed flange end face is provided with equally spaced M6 threaded holes, and the end flange and the fixed flange are connected together by M6 connecting bolts.

[0008] Preferably, the water-cooled beryllium window includes a loose flange inner ring, a loose flange outer ring, a front connecting pipe, two cooling pipes, a fixed flange, a rear connecting pipe, a beryllium plate, and an absorber; the absorber has a through hole, and the beryllium plate is welded to one side of the through hole to form a beryllium window; the absorber has two channels, which are respectively connected to one of the cooling pipes to form a water-cooled circulation channel; the rear connecting pipe and the front connecting pipe are respectively connected to the front and rear end faces of the absorber, and the loose flange inner ring and the loose flange outer ring are connected to the fixed flange.

[0009] Preferably, the front and rear ends of the absorber are respectively provided with a groove for connecting to the rear connecting pipe and the front connecting pipe; the through hole is located in the groove shown.

[0010] Preferably, the rear connecting pipe and the front connecting pipe are connected to the groove by electron beam welding.

[0011] Preferably, the beryllium window and the cooling pipe are connected by electron beam welding.

[0012] Preferably, both the front connecting pipe and the rear connecting pipe are stainless steel connecting pipes.

[0013] Preferably, the end flange is sealed to the Kapton membrane by a rubber ring.

[0014] Preferably, the cooling air is helium or argon.

[0015] The advantages of this invention are as follows: The beryllium window device of this invention adds a gas protection device to the water-cooled beryllium window. By using gas-cooling, it can not only extend the service life of the beryllium window, but also avoid the harm to the human body caused by beryllium oxidation.

[0016] The advantages of this invention are mainly as follows: First, in the beryllium window gas protection device of this invention, the end flange and Kapton membrane are directly sealed by a rubber ring. When the Kapton membrane is damaged, it can be directly replaced, reducing the cost of use. Second, helium or argon can be used for ventilation. These gases have good cooling efficiency, which can significantly improve heat exchange, reduce the surface temperature of the beryllium plate, and extend the service life. Attached Figure Description

[0017] Figure 1 Structural diagram of the beryllium window gas protection device of the present invention.

[0018] Figure 2 This is a structural diagram of a water-cooled beryllium window.

[0019] Figure 3 This is a cross-sectional view of the water-cooled beryllium window.

[0020] Figure 4 This is an exploded view of a gas beryllium window protection device.

[0021] Figure 5 This is an assembly diagram of a gas beryllium window protection device.

[0022] Reference numerals: 1-Water-cooled beryllium window, 2-Gas beryllium window protection device; 101-Loose flange inner ring, 102-Loose flange outer ring, 103-Front connecting pipe, 104-Cooling copper pipe, 105-Fixed flange, 106-Rear connecting pipe, 107-Beryllium plate, 108-Copper absorber; 201-Kapton membrane, 202-Gas pipeline, 203-M6 connecting bolt, 204-End flange. Detailed Implementation

[0023] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0024] like Figure 1 The beryllium window gas protection device shown is an example of the present invention, which mainly includes a water-cooled beryllium window 1 and a matching gas beryllium window protection device 2. The water-cooled beryllium window 1 and the matching gas beryllium window protection device 2 are connected by bolts.

[0025] like Figure 2 and Figure 3 As shown, the water-cooled beryllium window 1 mainly consists of a loose flange inner ring 101, a loose flange outer ring 102, a front connecting pipe 103, a cooling copper pipe 104, a fixed flange 105, a rear connecting pipe 106, a beryllium plate 107, and a copper absorber 108. The copper absorber 108 has a through hole, and the beryllium plate 107 is brazed to one side of the through hole to form a beryllium window. The beryllium window welding assembly and the cooling copper pipe 104 are then connected by electron beam welding to form the beryllium plate and copper cooling assembly. The front and rear ends of the copper absorber 108 are respectively provided with grooves for welding the rear connecting pipe 106 and the front connecting pipe 103 to the beryllium plate and copper cooling assembly by electron beam welding. Finally, the loose flange inner ring 101, the loose flange outer ring 102, and the fixed flange 105 are welded to the welding assembly by argon arc welding to form the entire water-cooled beryllium window assembly. After the water-cooled beryllium window is welded, it is installed on the beamline station. The inner ring 101 side of the loose flange is connected to the vacuum side, and the fixed flange 105 side is installed to the atmospheric side, so that the beryllium plate is subjected to positive pressure.

[0026] Both the front connecting pipe 103 and the rear connecting pipe 106 are stainless steel connecting pipes.

[0027] like Figure 4 and Figure 5 As shown, the gas beryllium window protection device 2 mainly consists of a Kapton membrane 201, a gas pipe 202, M6 connecting bolts 203, and an end flange 204. First, the fixed flange 105 is machined, and a 4mm diameter through hole is drilled on it to connect to the gas pipe 202. Gas enters the rear connecting pipe 106 through the gas pipe 202 and the through hole to cool the beryllium window. The gas pipe 202 and the fixed flange 105 are then connected together by electron beam welding. Next, the Kapton membrane 201 is placed inside the blade of the fixed flange 105 to isolate the gas and prevent atmospheric gas from entering the rear connecting pipe 106 through the end flange 204. Equally spaced M6 threaded holes are drilled on the end face of the fixed flange 105, and the end flange 204 and the fixed flange 105 are connected together using M6 connecting bolts 203 to form the entire gas protection device.

[0028] In actual use, the water-cooled beryllium window 1 and the gas beryllium window protection device 2 are first connected together with bolts, then the water-cooled beryllium window 1 is installed on the beamline station, and then the cooling water is connected to the cooling water and the gas pipe 202 is connected to the cooling gas through the cooling copper pipe 104 to achieve the cooling effect of beryllium plate 107.

[0029] This invention can maximize the service life of beryllium windows in relatively harsh working environments. By inflating the Kapton film 201 between the Kapton film 201 and the beryllium window, if damage or cracks are found in the Kapton film 201, the service life can be extended at a lower cost by replacing the Kapton film 201 in a timely manner.

[0030] The device also has a beryllium plate coating option, but this option has higher coating costs, and the coating process is irreversible. The coating thickness also affects the X-ray transmittance, thus affecting the experimental results. Therefore, this gas protection device is not only replaceable, but also improves cooling efficiency and extends service life.

[0031] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A beryllium window device that provides both gas and water cooling protection, characterized in that, The device includes a water-cooled beryllium window and a gas beryllium window protection device. The gas beryllium window protection device includes a Kapton membrane, two gas pipes, and an end flange. The fixed flange on the atmospheric side of the water-cooled beryllium window is connected to the end flange, and the Kapton membrane is installed in the knife edge of the fixed flange. The side wall of the fixed flange has two through holes, which are respectively sealed and connected to one of the gas pipes. One of the gas pipes is used to introduce cooling air to cool the beryllium plates in the water-cooled beryllium window, and the other gas pipe is used to discharge gas to form an air cooling cycle.

2. The beryllium window device according to claim 1, characterized in that, The fixed flange end face on the atmospheric side of the water-cooled beryllium window is provided with threaded holes, and the end flange and the fixed flange are connected together by bolts.

3. The beryllium window device according to claim 2, characterized in that, The fixed flange end face is provided with equally spaced M6 threaded holes, and the end flange and the fixed flange are connected together by M6 connecting bolts.

4. The beryllium window device according to claim 1, 2, or 3, characterized in that, The water-cooled beryllium window includes a loose flange inner ring, a loose flange outer ring, a front connecting pipe, two cooling pipes, a fixed flange, a rear connecting pipe, a beryllium plate, and an absorber. The absorber has a through hole, and the beryllium plate is welded to one side of the through hole to form a beryllium window. The absorber has two channels, which are respectively connected to one of the cooling pipes to form a water-cooled circulation channel. The rear connecting pipe and the front connecting pipe are respectively connected to the front and rear end faces of the absorber, and the loose flange inner ring and the loose flange outer ring are connected to the fixed flange.

5. The beryllium window device according to claim 4, characterized in that, The front and rear ends of the absorber are respectively provided with a groove for connecting to the rear connecting pipe and the front connecting pipe; the through hole is located in the groove shown.

6. The beryllium window device according to claim 5, characterized in that, The rear connecting pipe and the front connecting pipe are connected to the groove by electron beam welding.

7. The beryllium window device according to claim 4, characterized in that, The beryllium window is connected to the cooling pipe by electron beam welding.

8. The beryllium window device according to claim 4, characterized in that, Both the front connecting pipe and the rear connecting pipe are stainless steel connecting pipes.

9. The beryllium window device according to claim 1, 2, or 3, characterized in that, The end flange is sealed to the Kapton membrane by a rubber ring.

10. The beryllium window device according to claim 1, 2, or 3, characterized in that, The cooling air is helium or argon.

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