Manufacturing method of superconductor cavity

A technology of superconducting cavity and superconducting material, which is applied in the manufacturing field of radio frequency superconducting accelerating cavity (referred to as superconducting cavity), which can solve problems such as manufacturing failure, high welding risk, and difficulty in dimensional accuracy of superconducting cavity, and improve the quality of finished products. High frequency and high frequency characteristics, guaranteed high frequency characteristics, and simplified processing

Active Publication Date: 2014-02-12
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Claims
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Problems solved by technology

[0011] Using the above method to manufacture a superconducting cavity has the following problems: (1) the process is complicated and the cycle is long, and it generally takes one year to manufacture a superconducting cavity with a new structure or new parameters; (2) it is easy to scratch and pollute niobium during the manufacturing process (3) Due to the rebound characteristics of niobium materials, it is difficult to meet the design size requirements in one stamping, and it is necessary to vacuum anneal the stamped parts, and then carry out secondary stamping Orthopedics, it is very difficult to ensure the dimensional accuracy of the superconducting cavity; (4) A superconducting cavity generally needs to be welded with dozens of welds, and chemical treatment must be carried out before each welding. Surface welds are formed smooth, high welding risk

Method used

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  • Manufacturing method of superconductor cavity
  • Manufacturing method of superconductor cavity
  • Manufacturing method of superconductor cavity

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Example 1: see figure 1 , a method for preparing a high-purity niobium superconducting cavity, which mainly includes the following steps:

[0036] (1) Preparation:

[0037] 1) The raw material is high-purity niobium powder: high-purity niobium powder is obtained by reducing niobium oxide, the particle size of the powder is 10nm-20μm, and the purity is 99%-99.99%;

[0038] 2) Use CAD software to generate a superconducting cavity model, taking a half-wavelength cavity as an example, see figure 2 and image 3 , using layering software to layer it, and each slice layer describes the cross-section of the superconducting cavity with a certain height of 0.05-0.3mm;

[0039] 3) Use the atmosphere control system to provide the molding device with argon with a purity better than 99.9996% and a pressure of 0.1-0.2Mpa argon to protect the environment;

[0040] 4) Spread the high-purity niobium powder in step 1) on the working table of the molding room;

[0041] 5) Using the s...

Embodiment 2

[0051] Embodiment 2: Nb proposed by the present invention 3 The embodiment of the Sn superconducting cavity manufacturing method is described in detail as follows:

[0052] 1 preparation:

[0053] (1) The raw material used is Nb 3 Sn powder, powder particle size is 10nm-20μm, purity 99%-99.99%;

[0054] (2) Use CAD and SolidWorks software to draw the superconducting cavity model, taking the half-wavelength cavity as an example, see figure 2 and image 3 , using layering software to layer it, the height of each slice layer is 0.05-0.3mm, and each slice layer describes the cross-section of the superconducting cavity with a certain height;

[0055] (3) For the process of manufacturing superconducting cavity by laser melting, see figure 1 , in the environment protected by high-purity argon, the purity of high-purity argon is 99.9996%, Nb 3 The piston in the Sn powder feeding cylinder 1 moves upwards to supply Nb to the molding chamber 3 Sn powder, powder spreading roller 4...

Embodiment 3

[0062] Embodiment 3: see figure 1 , a MgB 2 A method for preparing a superconducting cavity mainly includes the following steps:

[0063] (1) Preparation:

[0064] 1) The raw material is MgB 2 Powder: powder particle size is 10nm-20μm, purity 99%-99.99%:

[0065] 2) Use CAD software to generate a superconducting cavity model, taking a half-wavelength cavity as an example, see figure 2 and image 3 , using layering software to layer it, and each slice layer describes the cross-section of the superconducting cavity with a certain height of 0.05-0.3mm;

[0066] 3) Use the atmosphere control system to provide the molding room with argon with a purity better than 99.9996% and a pressure of 0.1-0.2Mpa argon to protect the environment;

[0067] 4) Add the MgB from step 1) 2 The powder is spread on the working table of the molding room;

[0068] 5) Use the scanning control system to "print" the laser energy onto the powder layer according to the software model description of ...

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Abstract

The invention belongs to the technical field of particle accelerators and particularly relates to manufacture of a radio frequency superconductor cavity. A manufacturing method of the superconductor cavity mainly comprises the following steps: (1) using superconductor materials as raw materials, (2) utilizing CAD software to generate a superconductor cavity model, and adopting layering software to layer the superconductor cavity model, (3) using an atmosphere control system to provide argon for a forming chamber, (4) laying powder of superconductor materials in the step (1) on a forming table of the forming chamber, (5) using a scanning control system to print laser energy onto a powder layer according to the description of a software model of a superconductor cavity slicing layer so as to generate a superconductor material slicing layer entity. The entity is a part of the superconductor cavity. A next slicing layer is processed continually on the first slicing layer entity until the whole superconductor cavity processing process is finished. Finally, mechanical polishing, chemical washing, high-temperature annealing, high-pressure super-pure water washing and super-clean chamber assembly are conducted. The method shortens the development cycle of the superconductor cavity, improves the finished product rate of the development of the superconductor cavity due to the fact that the whole superconductor cavity is free of welding joints, is free of restriction of stamping forming conditions and capable of improving the performance of the superconductor cavity, and reduces product cost due to the fact that surplus superconductor material powder can be used repeatedly.

Description

technical field [0001] The invention belongs to the technical field of particle accelerators, in particular to a method for manufacturing a radio frequency superconducting accelerating cavity (referred to as a superconducting cavity). Background technique [0002] Compared with the normal temperature accelerating cavity, the superconducting accelerating cavity has the advantages of high accelerating efficiency and low high-frequency heat loss. Superconducting accelerating cavities have become the core devices of large scientific devices such as linear colliders, free electron lasers, spallation neutron sources, advanced light sources, and accelerator-driven nuclear transmutation devices (ADS). Various types of superconducting cavities, such as ellipsoid cavity, Spoke cavity, half-wavelength cavity (HWR), and quarter-wavelength cavity (QWR), have been developed in the world. At present, the raw materials used in the production of basically all types of superconducting cavitie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB22F3/105B23P15/00
Inventor 何源岳伟明张生虎
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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