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Half-wavelength superconductive accelerating cavity

A superconducting acceleration cavity, half-wavelength technology, applied in accelerators, electrical components and other directions, can solve the problems of unstable cavity resonance frequency, difficult to operate accelerators stably, large wave deformation, etc., to achieve compact structure and suppress field emission. and secondary electron multiplication phenomenon, improve the effect of stability

Inactive Publication Date: 2014-04-09
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One disadvantage of extruded half-wavelength superconducting cavities is that the middle region of the outer cavity has low strength and large deformation due to helium pressure fluctuations, resulting in unstable resonant frequency of the cavity and difficulty in stable operation of the accelerator. At present, this type of superconducting cavity has been produced internationally. The resonant frequency of the half-wavelength superconducting cavity varies with helium pressure fluctuations to 60Hz / mbar; another disadvantage of the extruded half-wavelength superconducting cavity is that the gap is narrow, and it is difficult for high-purity and high-pressure water to wash the entire inner surface of the cavity, which is easy to Causes field emission. At present, this type of half-wavelength superconducting cavity has been produced internationally. The best test result is that the peak electric field is 42MV / m, and the corresponding quality factor Q0 is 2×10 8

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  • Half-wavelength superconductive accelerating cavity
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  • Half-wavelength superconductive accelerating cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a half-wavelength superconducting acceleration cavity, including an outer cavity cylinder, a mandrel, and a short circuit board, the two ends of the external cavity cylinder are cylindrical cylinders 1, and the middle cross section of the external cavity cylinder is composed of Two straight lines connect two semicircular racetrack-shaped cylinders 2, and the racetrack-shaped cylinder 2 is connected to the cylindrical cylinder 1 at both ends through a gentle transition cylinder 3; outer chambers are respectively provided on both sides of the racetrack-shaped cylinder 2 Body beam tubes 8, 25, two connecting beam tubes located on the outside of the cavity are respectively connected to beam tube flanges 9, 26; power coupling tubes 10, 23 are also pierced on both sides of the racetrack-shaped cylinder 2, One end of the two coupling tubes located outside the chamber is respectively connected to the p...

Embodiment 2

[0023] Example 2: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a half-wavelength superconducting accelerating cavity,

[0024] The upper short-circuit plate 18 and the lower short-circuit plate 17 are respectively provided with cleaning pipes 5, 19, and the outer sides of the cleaning pipes 5, 19 are respectively connected with cleaning pipe flanges 6, 20 connected with external devices, and the upper short-circuit plate 18 The angle γ between the connection of the two cleaning pipes 5 and the connection of the two cleaning pipes 19 of the lower short-circuit board 17 is 40°; the angle α between the connection of the two cleaning pipes 5 of the upper short-circuit board 18 and the connection of the coupling pipe is 20°; The angle β between the connection line of the two cleaning pipes 19 of the lower short circuit board 17 and the connection line of the coupling pipe is 20°.

[0025] On the gentle transition surface in the middle of the outer cavity cylin...

Embodiment 3

[0027] Embodiment 3: see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , a half-wavelength superconducting accelerating cavity,

[0028] The upper short-circuit plate 18 and the lower short-circuit plate 17 are respectively provided with cleaning pipes 5, 19, and the outer sides of the cleaning pipes 5, 19 are respectively connected with cleaning pipe flanges 6, 20 connected with external devices, and the upper short-circuit plate 18 The included angle γ between the connecting lines of the two cleaning pipes 5 and the connecting lines of the two cleaning pipes 19 of the lower short-circuit board 17 is 90°; the included angle α between the connecting lines of the two cleaning pipes 5 of the upper short-circuit board 18 and the connecting line of the coupling pipe is 45°; The angle β between the connection line of the two cleaning pipes 19 of the lower short circuit board 17 and the connection line of the coupling pipe is 45°.

[0029] On the gentle transition surfa...

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Abstract

The invention belongs to the technical field of particle accelerators and relates to a half-wavelength superconductive accelerating cavity. The half-wavelength superconductive accelerating cavity comprises an outer-cavity barrel, wherein two ends of the outer-cavity barrel are cylindrical barrels, a cross section of the middle of the outer-cavity barrel is a runway-shaped barrel formed by connecting two straight lines with two semi-circles, and the runway-shaped barrel is connected with the cylindrical barrels at two ends through smooth transition barrels. Beam pipes respectively penetrate two sides of the runway-shaped barrel, and one end of each of the communicated beam pipes are located on the outer side of the cavity is respectively connected with a beam pipe flange. Power coupling pipes further penetrate two sides of the runway-shaped barrel, and one end of each of the power coupling pipes located on the outer side of the cavity is respectively connected with a power coupling flange. A core rod is arranged on a central line in the outer-cavity barrel. The outer-cavity barrel is connected with the core rod through upper and lower circular-arc-shaped short circuit plates. The half-wavelength superconductive accelerating cavity is compact in structure and short in occupied beam direction distance and is especially suitable for acceleration of below-10MeV low-energy protons and heavy ions.

Description

technical field [0001] The invention belongs to the technical field of particle accelerators, in particular to a radio frequency superconducting accelerating cavity. Background technique [0002] Environment and energy are the basis for human survival and development. As my country's economy and society continue to grow rapidly, energy consumption and demand are increasing day by day. The increase in global fossil energy consumption directly leads to an increase in greenhouse gas emissions, which may be one of the factors causing global climate change and is threatening human survival and economic and social development. The development of clean energy has become a priority for global energy development. The accelerator-driven nuclear waste transmutation system ADS (Accelerator-Driven System) is an effective way to realize clean energy, and the high-current megawatt-level high-power proton accelerator is one of the most critical systems in the ADS system. [0003] Due to ...

Claims

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Application Information

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IPC IPC(8): H05H7/20
Inventor 何源岳伟明何守波张生虎
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI