A service structure of a silicon pixel in-trail detector with high heat dissipation capacity and high integration degree and a mounting method thereof

Abstract

The application discloses a silicon pixel in-diameter track detector service structure with high heat dissipation capacity and high integration degree and a mounting method thereof, which comprises a service bucket, a four-claw flange, a fixing ring, a cable output bucket, a composite sleeve ring and a heat dissipation bucket. The service bucket is composed of a variable-diameter conical half bucket, the front end of which is connected with the composite sleeve ring, and the rear end of which is connected with the fixing ring; the claw arms of the four-claw flange are rigidly connected with the service bucket; the cable output bucket is quickly assembled with the fixing ring and is used for combing and fixing cables and cooling pipelines; the heat dissipation bucket is fixed to the inner wall of the service bucket, and a closed flow channel is arranged in the heat dissipation bucket and forms a closed water cooling cavity with the inner wall of the service bucket. The three-section coaxial heat dissipation bucket and the water cooling circulation loop are adopted in the application, the variable-diameter service bucket and the annular hollow combing plate are combined, the unification of high heat dissipation capacity and high integration degree is realized, the limit performance requirement of a super silicon in-diameter track detector can be met, and the stable and high-precision operation of the detector in an extreme environment with high brightness and strong radiation can be ensured.

Description

Technical Field

[0001] This invention belongs to the field of high-precision detector mechanical design and integration technology, specifically relating to a silicon pixel inner track detector service structure with high heat dissipation capacity and high integration and its installation method, which is particularly suitable for the support, heat dissipation and integration service system of inner track detectors in high-brightness electron-positron colliders such as the Super Taum device. Background Technology

[0002] The Super Tau-Charm Facility (STCF) is a new generation of high-luminosity electron-positron collider planned and constructed in my country. Its center-of-mass energy and collision luminosity represent orders of magnitude higher than existing facilities. The facility's core scientific objectives are to accurately measure key free parameters of the Standard Model and systematically study the decay characteristics of tau-charm particles. It will also significantly improve the detection sensitivity of new physics signals beyond the Standard Model, such as exotic hadron states and dark matter candidate particles. It is a core large-scale scientific facility for my country to conduct cutting-edge research in tau-charm high-energy physics.

[0003] The STCF's extremely high collision luminosity imposes extremely demanding technical requirements on its core detection system—the inner track detector. This system must simultaneously meet several extreme performance targets within a polar angle coverage range of 20°–160°: extremely low mass budget to reduce the impact of multiple scattering of charged particles on track measurement accuracy; extremely low detector occupancy to adapt to high event rate operating environments; and excellent tolerance to strong background radiation. The performance of the inner track detector directly determines the achievement of the STCF's overall physical science objectives.

[0004] Currently, track detection technologies suitable for the aforementioned extreme performance requirements are mainly divided into two categories: micro-pattern gas detectors (MPGDs) and silicon pixel detectors. MPGDs have been successfully applied in several high-energy physics experiments such as KLOE and BES III, but their inherent spatial resolution has a theoretical upper limit, and their large structural volume makes them difficult to meet the core design requirements of STCF for precise track measurement and extreme thinness. In contrast, silicon pixel detectors, with their integrated design, can integrate the sensor and readout electronics within the pixel unit, significantly reducing the overall thickness of the detector while possessing ultra-high position resolution and excellent radiation resistance. This is currently recognized as the most promising technological path for track detectors within STCF. However, the high-density integration design and extreme thinness requirements of silicon pixel detectors also bring unprecedented engineering challenges to their supporting service structures. As the core carrier of the silicon pixel inner track detector (SMT) and its pixel modules, the service structure must simultaneously realize core functions such as mechanical support, thermal management, power transmission, and high-speed data readout. Its performance directly determines the operational stability and detection accuracy of the detector. Currently, existing SMT service structures used in high-energy physics experiments cannot simultaneously meet the STCF's multiple core requirements for efficient heat dissipation, high integration, low material budget, high-precision positioning, and ease of maintenance. This has become a key technical bottleneck restricting the performance improvement of the STCF inner track detector and ensuring the successful achievement of its scientific objectives. Therefore, developing a SMT service structure with high heat dissipation capacity and high integration has become a core technical requirement to ensure the high-performance and stable operation of the detector in extreme environments. Summary of the Invention

[0005] Purpose of the invention: In response to the requirements of silicon pixel inner track detector service structures used in high-energy physics experiments, and based on existing detector support schemes, the core objective of this invention is to provide a silicon pixel inner track detector service structure that combines high heat dissipation capability and high integration, along with a matching installation method, to meet the extreme performance requirements of STCF inner track detectors and ensure stable and high-precision operation of the detector in extreme operating environments with high brightness and strong radiation.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0007] A service structure for a silicon pixel inner track detector with high heat dissipation capability and high integration includes a service barrel, a four-jaw flange, a composite collar, a fixing ring, a cable output barrel, and a heat dissipation barrel.

[0008] The described service barrel is composed of two conical half-barrels joined together. The front end with a smaller diameter of the conical half-barrel is connected to a composite collar, and the rear end with a larger diameter is connected to a fixing ring. The conical half-barrel is a variable-diameter cylindrical structure that penetrates axially. The diameter of its variable-diameter cylindrical section decreases gradually from the rear end to the front end, and adjacent cylindrical sections are smoothly connected by a conical transition section. An installation end face perpendicular to the radial direction is provided on the outer wall of the variable-diameter cylindrical section, and threaded holes are provided on the installation end face for the installation and fixation of the electronics components of the silicon pixel inner track detector.

[0009] The described four-jaw flange includes a central ring body and jaw arms extending radially outward from the central ring body. An oval installation hole is provided at the center of the central ring body, and threaded holes are evenly distributed in the oval installation hole for fixing the central beam tube of the detector. The jaw arms are evenly distributed at intervals of 90° centered on the central ring body to form a cross-shaped support structure; installation and fixation holes are provided at the outer ends of the jaw arms and are rigidly connected to the service barrel by screws.

[0010] The described composite collar is composed of an inner ring and an outer ring formed integrally. Multiple inclined installation platforms are provided on the inner ring for the installation and fixation of electronics components; threaded holes are provided on the outer ring for connection and fixation to the front end of the conical half-barrel of the service barrel.

[0011] The described fixing ring includes an annular body and sheet-shaped connecting plates extending radially. A square card slot is provided on the outer end face of the annular body for the connection and fixation of the cable output barrel; multiple threaded holes are evenly provided on the inner end face for the connection and fixation of the service barrel; the sheet-shaped connecting plates are used for the installation and fixation of the overall assembled service structure to improve the overall connection stability.

[0012] The described cable output barrel is composed of a conical round barrel, an annular hollow combing plate, and a buckle extending axially along the conical round barrel. The buckle corresponds to and cooperates with the square card slot on the outer end face of the fixing ring for realizing the rapid assembly between the cable output barrel and the fixing ring. Arrayed through holes are provided on the annular hollow combing plate for the hierarchical combing, limiting, and fixation of the cables of the electronics components inside the detector and the cooling pipelines.

[0013] The described heat dissipation barrel is an integrated water-cooling temperature control and wiring support component provided in support of the service barrel. It adopts a three-section coaxial heat dissipation barrel structure matching the conical half-barrel and is fixed to the inner wall of the service barrel; the heat dissipation barrel includes an inner heat dissipation barrel, a middle heat dissipation barrel, and an outer heat dissipation barrel, corresponding to the three-stage variable-diameter cylindrical sections of the service barrel respectively to improve the heat conduction efficiency and the overall structural rigidity. A closed flow channel is provided inside the heat dissipation barrel, and it cooperates with the inner wall of the service barrel to form a closed-loop water-cooling cavity. Each section of the heat dissipation barrel is connected by a connecting pipeline to form a complete closed-loop water-cooling circulation circuit. An annular support ring is provided on the outer wall of the outer heat dissipation barrel for the bundled arrangement of cables and cooling pipelines. Attached Figure Description

[0014] The following detailed description, in conjunction with the accompanying drawings and embodiments, provides a more comprehensive explanation of the silicon pixel inner track detector service structure and its installation method, which features high heat dissipation capability and high integration.

[0015] Figure 1 This is a schematic diagram of a silicon pixel inner track detector service structure with high heat dissipation capability and high integration, according to the present invention.

[0016] Figure 2 Schematic diagram of the conical half-barrel structure for the service bucket

[0017] Figure 3 Schematic diagram of a four-jaw flange structure

[0018] Figure 4 Schematic diagram of the composite collar structure

[0019] Figure 5 Schematic diagram of the heat dissipation tank structure

[0020] Figure 6 Schematic diagram of the fixed ring structure

[0021] Figure 7 Schematic diagram of cable output barrel structure Detailed Implementation

[0022] The service structure of the present invention will be further described in detail below with reference to specific embodiments.

[0023] See Figures 1-7 This embodiment provides a silicon pixel inner track detector service structure and its installation method with high heat dissipation capacity and high integration. Its core lies in providing a layered modular service structure scheme that can simultaneously meet the usage requirements of support and fixation, thermal management, cable guidance, structural adjustment, and convenient assembly and disassembly. The service structure includes: a service tank 1, a four-jaw flange 2, a composite collar 3, electronic components 4, a heat dissipation tank 5, a fixing ring 6, and a cable output tank 7.

[0024] The service structure module centered on the service barrel 1 is composed of four conical half-barrels 11 welded together in pairs. The front end 114 of each conical half-barrel 11 has evenly distributed threaded holes that mate with pre-drilled holes on the outer ring 31 of the composite collar 3. Similarly, the rear end 111 of each conical half-barrel 11 has evenly distributed threaded holes that match threaded holes 612 on the inner end face of the fixing ring 6. The conical half-barrel 11 is axially divided into three layers of sequentially connected variable-diameter cylindrical structures. The inner and outer diameters of these variable-diameter cylindrical sections decrease progressively from the rear end 111 to the front end 114 along the axial direction. Adjacent variable-diameter cylindrical sections are smoothly connected by conical transition sections to improve structural continuity and reduce stress concentration. Furthermore, the outer wall of the variable-diameter cylindrical section is machined with a mounting end face 112 perpendicular to the radial direction, and the mounting end face 112 is provided with a threaded hole 113 for fixing the electronic components 4 of the silicon pixel inner track detector, thereby realizing a high-density integrated arrangement in a limited space.

[0025] The four-jaw flange 2 consists of a central ring 21 and four radially extending claw arms 22. The central ring 21 has elliptical mounting holes 23 inside, used to fix the central beam tube of the inner track detector. The claw arms 22 are evenly spaced at 90° intervals along the circumference of the central ring, forming a cross-shaped four-jaw support structure. Each claw arm 22 has mounting holes 24 at its outer end and is rigidly connected to the service barrel with screws to improve overall support rigidity and coaxiality.

[0026] The composite collar 3 is composed of an integrally formed inner ring 32 and an outer ring 31. The inner ring 32 is provided with multiple inclined platforms 321, and the inclined platforms 321 are provided with threaded holes for installing and fixing the electronic components of the inner track detector; the outer ring 31 is also provided with threaded holes for connecting and fixing the composite collar 3 to the front end 114 of the service barrel 1.

[0027] The fixing ring 6 includes an annular body 61 and a sheet-like connecting plate 62 extending radially from its outer wall. The outer end face of the annular body 61 has a square groove 611, and the inner end face has multiple axially threaded holes 612 evenly distributed circumferentially. The inner diameter of the annular body 61 is the same as the inner diameter of the rear end 111 of the conical half-barrel 11, so that a continuous and smooth inner wall channel is formed after assembly. The sheet-like connecting plate 62 is used to install and fix the service structure after the overall assembly is completed, thereby improving the overall connection stability and load-bearing capacity.

[0028] The described cable output barrel 7 includes a conical barrel 71, multiple layers of annular hollow combing plates 72, and sheet-shaped buckles 73 extending along the axial direction of the conical barrel. The positions and contours of the buckles 73 correspond one-to-one with the square card slots 611 on the outer end face of the fixing ring 6. During installation, the buckles 73 are embedded into the square card slots 611, thereby achieving circumferential precise positioning, axial limiting, and quick docking and fixing between the cable output barrel 7 and the fixing ring 6. Inside the conical barrel 7, multiple layers of annular hollow combing plates 72 are coaxially arranged. Each layer of annular hollow combing plate 72 is evenly provided with multiple groups of arrayed through holes. The through holes include cable through holes and cooling pipe through holes, which are respectively used for hierarchical combing, regular arrangement, and limiting and fixing of the signal cables, high-voltage power supply cables, and cooling pipelines of the internal electronics components of the detector, so as to avoid entanglement and extrusion between the pipelines and cables, and at the same time standardize the wiring path and reduce the interference to the beam channel.

[0029] The heat dissipation barrel 5 is a supporting component for integrated water-cooling temperature control and wiring of the conical half-barrel 11 of the inner diameter track detector. The whole adopts a three-section coaxial split structure matching the conical half-barrel 11, and is welded and fixed to the inner wall of the conical half-barrel 11 throughout, forming an integrated temperature control and support system. The described heat dissipation barrel 5 includes three parts: an inner heat dissipation barrel 51, a middle heat dissipation barrel 53, and an outer heat dissipation barrel 54, corresponding to the three-stage stepped cylindrical sections of the conical half-barrel 11 respectively. Each part of the heat dissipation barrel is a rotary body structure that precisely fits the corresponding cylindrical section of the conical half-barrel 11 to improve the heat conduction efficiency and the overall structural rigidity. Inside each section of the heat dissipation barrel, a closed internal cooling flow channel is formed by milling and grooving and then welding and sealing. The internal cooling flow channels between the inner heat dissipation barrel 51, the middle heat dissipation barrel 53, and the outer heat dissipation barrel 54 are interconnected through connecting pipelines 52 arranged along the inner wall of the conical half-barrel 11. The described connecting pipelines 52 are welded and fixed to the inner wall of the conical half-barrel 11 throughout and are closely arranged in contact with it, finally forming a complete closed-loop water-cooling circulation circuit. An inlet or outlet is provided at the end of the outer heat dissipation barrel 54 for docking with an external cooling circulation system. And an annular support ring 55 is coaxially arranged on the outer wall surface of the outer heat dissipation barrel 54. The annular support ring 55 is provided with arrayed regular holes, which are used for bundling and integrating the cables and cooling pipelines dispersed along the barrel wall and uniformly guiding them backward to the annular hollow combing plate 72 of the cable output barrel 7, thereby achieving the whole-process regular wiring and rigid support from the wire outlet end of the electronics component 4 to the cable output barrel 7, and further improving the overall wiring stability of the detector.

[0030] The present invention also provides an installation method for the above service structure, specifically including the following steps:

[0031] Step 1 (Center Positioning and Four-Claw Flange Installation): First, the center beam tube of the detector is positioned and calibrated. The center ring of the four-claw flange is then fitted onto the outside of the center beam tube, ensuring a precise fit between the elliptical mounting hole and the outer contour of the beam tube. Subsequently, screws are used to lock and secure the flange through the threaded holes circumferentially located on the center ring, ensuring the coaxiality and radial positioning accuracy between the four-claw flange and the beam tube. After installation, the horizontality and symmetry of the four claw arms are checked to ensure the assembly accuracy of subsequent service structures.

[0032] Step 2 (Pre-installation of composite collar and installation of front-end module): Install the composite collar at the designated assembly station. Prioritize the pre-installation of electronic components, readout modules and signal conversion components on multiple inclined mounting platforms of the inner ring, and complete the initial cable interface reservation. Then, align the outer ring of the composite collar with the front-end connection interface of the service barrel, and fix the connection with screws and threaded holes to ensure the stability and reliability of the front-end support structure.

[0033] Step 3 (Heat Dissipation System Assembly): Following the order from the inside out, install the inner, middle, and outer heat dissipation tanks sequentially to the corresponding three-stage variable-diameter cylindrical sections on the inner wall of the service tank, ensuring a tight fit between each heat dissipation tank section and the inner wall of the service tank. Then connect the cooling pipes between the heat dissipation tank sections to form a continuous closed flow channel, and connect it to the external cooling system interface to form a complete closed-loop water-cooling circulation circuit. After installation, perform a sealing test and a water flow test to ensure there are no leaks.

[0034] Step 4 (Assembling the main body of the service bucket): Align and splice the conical half-buckets along the axial reference surface, adjust the splice gap and coaxiality to form a complete service bucket body; then connect the rear end of the service bucket to the inner end face of the fixing ring, and tighten it evenly with multiple screws to improve the overall structural rigidity and assembly stability.

[0035] Step 5 (Quick Assembly of Cable Output Bucket): Push the cable output bucket axially into the outside of the retaining ring, so that the clips engage one by one with the square slots on the outer end face of the retaining ring. Locking with the clips achieves quick assembly. If necessary, limit screws can be added for secondary fixation to improve vibration resistance during operation.

[0036] Step Six (Cable and Cooling Piping): Pass the signal cables, power cables, and cooling pipes from the detector's internal electronic components sequentially through the annular perforated comb plate inside the cable output bin, and arrange them in layers according to functional zones. Use array-type through-holes to independently limit and restrain different types of cables, preventing mutual interference, bending, or tangling.

[0037] Step 7 (Overall Fixing and Accuracy Verification): Install the assembled service structure to the preset position using the plate-like connecting plates on the fixing ring to complete the final fixing. After installation, conduct a comprehensive test on the overall structure for coaxiality, radial runout, cable layout, and cooling system flow. Once it is confirmed that the detector's operating requirements are met, the assembly is complete.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A silicon pixel inner-track detector service structure with high heat dissipation capability and high integration, characterized in that, include: The service tank consists of a tapered half-bucket with a variable diameter, with a composite collar connected to the front end and a fixing ring connected to the rear end; a four-jaw flange with its claw arms rigidly connected to the service tank; a cable output tank connected to the fixing ring for sorting and fixing cables and cooling pipes; and a heat dissipation tank fixed to the inner wall of the service tank, with a closed flow channel inside, forming a closed-loop water-cooling cavity with the inner wall of the service tank.

2. The service structure according to claim 1, characterized in that, The service barrel is a variable-diameter cylindrical structure that runs through the axis, with the diameter decreasing gradually from the rear end to the front end. Adjacent cylindrical sections are connected by a tapered transition section. Each cylindrical section has a mounting end face with threaded holes on its outer wall for fixing electronic components.

3. The service structure according to claim 1, characterized in that, The four-jaw flange includes a central ring body and claw arms evenly distributed at 90°. The central ring body has an elliptical mounting hole and threaded holes around its circumference for fixing the central beam tube.

4. The service structure according to claim 1, characterized in that, The outer end face of the fixing ring is provided with a square slot, and the inner end face is provided with multiple threaded holes; the cable output barrel includes a conical barrel, an annular hollow comb plate with arrayed through holes, and an axially extending buckle, which cooperates with the square slot to achieve quick assembly.

5. The service structure according to claim 1, characterized in that, The composite collar consists of an integrally formed inner ring and an outer ring. The inner ring is provided with multiple inclined mounting platforms for fixing electronic components, and the outer ring is provided with threaded holes for connection to the front end of the service barrel.

6. The service structure according to claim 1, characterized in that, The heat dissipation tank has a three-section coaxial structure, including an inner, middle and outer heat dissipation tank, which correspond to the three-stage variable diameter cylindrical sections of the service tank; each section of the heat dissipation tank is connected by connecting pipes to form a complete water-cooling circulation loop.

7. The service structure according to claim 6, characterized in that, The outer wall of the external heat dissipation tank is provided with an annular support ring for the bundled arrangement of cables and cooling pipes.

8. A silicon pixel inner track detector service structure with high heat dissipation capability and high integration, the installation method comprising the following steps: Step 1 (Center Positioning and Four-Claw Flange Installation): First, the center beam tube of the detector is positioned and calibrated. The center ring of the four-claw flange is then fitted onto the outside of the center beam tube, ensuring a precise fit between the elliptical mounting hole and the outer contour of the beam tube. Subsequently, screws are used to lock and secure the flange through the threaded holes circumferentially located on the center ring, ensuring the coaxiality and radial positioning accuracy between the four-claw flange and the beam tube. After installation, the horizontality and symmetry of the four claw arms are checked to ensure the assembly accuracy of subsequent service structures. Step 2 (Pre-installation of composite collar and installation of front-end module): Install the composite collar at the designated assembly station. Prioritize the pre-installation of electronic components, readout modules and signal conversion components on multiple inclined mounting platforms of the inner ring, and complete the initial cable interface reservation. Then, align the outer ring of the composite collar with the front-end connection interface of the service barrel, and fix the connection with screws and threaded holes to ensure the stability and reliability of the front-end support structure. Step 3 (Heat Dissipation System Assembly): Following the order from the inside out, install the inner, middle, and outer heat dissipation tanks sequentially to the corresponding three-stage variable-diameter cylindrical sections on the inner wall of the service tank, ensuring a tight fit between each heat dissipation tank section and the inner wall of the service tank. Then connect the cooling pipes between the heat dissipation tank sections to form a continuous closed flow channel, and connect it to the external cooling system interface to form a complete closed-loop water-cooling circulation circuit. After installation, perform a sealing test and a water flow test to ensure there are no leaks. Step 4 (Assembling the main body of the service bucket): Align and splice the conical half-buckets along the axial reference surface, adjust the splice gap and coaxiality to form a complete service bucket body; then connect the rear end of the service bucket to the inner end face of the fixing ring, and tighten it evenly with multiple screws to improve the overall structural rigidity and assembly stability. Step 5 (Quick Assembly of Cable Output Bucket): Push the cable output bucket axially into the outside of the retaining ring, so that the clips engage one by one with the square slots on the outer end face of the retaining ring. Locking with the clips achieves quick assembly. If necessary, limit screws can be added for secondary fixation to improve vibration resistance during operation. Step Six (Cable and Cooling Piping): Pass the signal cables, power cables, and cooling pipes from the detector's internal electronic components sequentially through the annular perforated comb plate inside the cable output bin, and arrange them in layers according to functional zones. Use array-type through-holes to independently limit and restrain different types of cables, preventing mutual interference, bending, or tangling. Step 7 (Overall Fixing and Accuracy Verification): Install the assembled service structure to the preset position using the plate-like connecting plates on the fixing ring to complete the final fixing. After installation, conduct a comprehensive test on the overall structure for coaxiality, radial runout, cable layout, and cooling system flow. Once it is confirmed that the detector's operating requirements are met, the assembly is complete.

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