CN214800003U - Water cooling structure capable of inhibiting RFQ cavity frequency drift - Google Patents
Water cooling structure capable of inhibiting RFQ cavity frequency drift Download PDFInfo
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- CN214800003U CN214800003U CN202120824571.2U CN202120824571U CN214800003U CN 214800003 U CN214800003 U CN 214800003U CN 202120824571 U CN202120824571 U CN 202120824571U CN 214800003 U CN214800003 U CN 214800003U
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Abstract
The utility model relates to the technical field of accelerators, in particular to a water cooling structure which can realize no frequency drift and can restrain RFQ cavity frequency drift; the water cooling structure comprises a first basic hole, a second basic hole and a variable hole which are arranged on the RFQ cavity; the utility model discloses an optimize the overall arrangement of water hole on the RFQ cross-section and realize that RFQ cavity is interior no frequency floats, and more specifically is the consumption of confirming the RFQ cavity, definite operating temperature, definite discharge just can confirm the position of basic hole one and basic hole two, through optimizing the position in variable hole, realizes that the no frequency of cavity floats, and the result is accurate reliable, and the method is simple and easy.
Description
Technical Field
The utility model relates to an accelerator technical field indicates a can realize the water-cooling structure that can restrain RFQ cavity frequency drift of no frequency drift especially.
Background
The four-wing radio frequency quadrupole field (RFQ) accelerator is an optimal accelerating structure selected after an ion source at a low-energy accelerating section of a high-current proton accelerator, the RFQ has the advantages of integrating transverse focusing, longitudinal acceleration and bunching into a whole, the RFQ cavity is heated and deformed by radio frequency power required by particle acceleration, the resonant frequency of the cavity is changed, and the frequency drift causes the change of the distribution of a radio frequency field in the cavity; since the transmission efficiency of RFQ particles is extremely sensitive to the radio frequency field distribution, this cavity frequency drift must be suppressed.
Disclosure of Invention
In order to solve the problem that four wing section radio frequency quadrupole field (RFQ) accelerator frequency drift leads to intracavity radio frequency field distribution to change, the utility model aims at providing a can restrain RFQ cavity water-cooling structure that floats frequently, realize restraining RFQ and float frequently mainly through optimizing water hole overall arrangement.
The utility model adopts the technical proposal that: a water cooling structure capable of inhibiting RFQ cavity frequency drift comprises a first base hole, a second base hole and a variable hole which are arranged on an RFQ cavity.
The RFQ cavity is cylindrical as a whole, the cross section of the RFQ cavity is circular, four wing bodies are arranged in the RFQ cavity, the shape and the structure of the four wing bodies are the same, the four wing bodies are axially and radially symmetrical, and a cavity is formed between every two adjacent wing bodies.
The cross section of each wing body is in an axial symmetry shape, two symmetrical wing shapes are arranged on two sides of the symmetry axis, and a first reference hole, a second reference hole and a variable hole which penetrate through the RFQ cavity in the axial direction are formed in each wing body.
One basic hole on each wing body is positioned at a position close to the cross section of the RFQ cavity, and two basic holes are respectively positioned at the positions of two symmetrical wing bodies in the wing body.
The variable orifice position is set at a position such that the RFQ cavity raw frequency is equal to the RFQ cavity actual frequency.
The utility model has the advantages that: the utility model discloses an optimize the overall arrangement of water hole on the RFQ cross-section and realize that RFQ cavity is interior no frequency floats, and more specifically is the consumption of confirming the RFQ cavity, definite operating temperature, definite discharge just can confirm the position of basic hole one and basic hole two, through optimizing the position in variable hole, realizes that the no frequency of cavity floats, and the result is accurate reliable, and the method is simple and easy.
Drawings
Fig. 1 is a schematic cross-sectional view of the RFQ cavity of the present invention.
Fig. 2 is a schematic cross-sectional structural design diagram of a half wing body of the present invention.
Reference is made to the accompanying drawings in which: 1-basic hole I, 2-basic hole II, 3-variable hole, 4-RFQ cavity, 5-wing body.
Detailed Description
The following detailed description of embodiments is provided in conjunction with the drawings of the specification:
since the RFQ cavity 4 of the present invention is a regular cylinder, and the four wing bodies 5 are axially and radially symmetrical, i.e. centrosymmetric, the RFQ cavity 4 is only illustrated by the cross-sectional structure in the drawings of the present embodiment, specifically as shown in fig. 1, and the wing bodies 5 are only illustrated by the half wing shape, specifically as shown in fig. 2.
As shown in fig. 1, a water-cooling structure capable of suppressing RFQ cavity frequency drift includes a first base hole 1, a second base hole 2 and a variable hole 3 disposed on an RFQ cavity 4; the RFQ cavity 4 is cylindrical as a whole and has a circular cross section, four wing bodies 5 are arranged in the RFQ cavity 4, the four wing bodies 5 are the same in shape and structure and are axially and radially symmetrical, and a cavity is formed between every two adjacent wing bodies 5; the cross section of each wing body 5 is in an axisymmetric shape, two symmetric wing shapes are arranged on two sides of the symmetric axis, and a first reference hole, a second reference hole and a variable hole 3 which penetrate through the RFQ cavity 4 along the axial direction are arranged on each wing body 5; one base hole 1 on each wing body 5 is positioned at a position close to the cross section of the RFQ cavity 4, and two base holes 2 are respectively positioned at the positions of two symmetrical wing shapes in the wing body 5; the variable orifice 3 is positioned such that the original frequency of the RFQ cavity 4 is equal to the actual frequency of the RFQ cavity 4.
The water cooling structure capable of inhibiting RFQ cavity 4 frequency drift mainly adopts a design method for inhibiting RFQ frequency drift, and the design method is used for a four-wing radio frequency quadrupole field accelerator; firstly, determining the cross section shape and cooling water temperature of an RFQ cavity 4, then determining water flow, obtaining the water temperature to be cooled by knowing the shape and size of the cavity and the generated heat when the RFQ cavity 4 is cooled usually according to determined content parameters, then determining the water flow, and determining the positions and the sizes of a first basic hole 1 and a second basic hole 2 through a general design principle, wherein the general design principle refers to that the first basic hole 1 is designed at the position close to the center of the cross section of the RFQ cavity 4, and the second basic hole 2 is designed at the positions of two symmetrical wing shapes in a wing body 5; the position and the size of the position 3 of the variable hole are determined by a simulation optimization method, the simulation optimization method is that the effect of the wall deformation of the RFQ cavity 4 on the resonance frequency is opposite to the effect of the RFQ electrode deformation on the resonance frequency, and the effects of the deformation of the cavity wall and the electrode on the resonance frequency are mutually offset by optimizing the position of the water hole at the position 3 of the variable hole and the water flow, so that the water cooling design without frequency drift in the cavity is realized.
The RFQ cavity 4 is cylindrical as a whole and has a circular cross section, and the four wing bodies 5 in the RFQ cavity 4 equally divide the RFQ cavity 4 into four cavities in the axial direction; the four wing bodies 5 in the RFQ cavity 4 are identical in shape and structure and are axially and radially symmetrical, namely, centrosymmetric, and a cavity is formed between every two adjacent wing bodies 5, so that the four cavities are total, the section of each wing body 5 is in an axisymmetric shape, two sides of the symmetry axis are in two symmetrical wing shapes, each wing body 5 is provided with a first reference hole, a second reference hole and a variable hole 3 which penetrate through the RFQ cavity 4 in the axial direction, one reference hole is arranged, two reference holes are arranged, one variable hole 3 is arranged, the first reference hole is arranged at a position close to the center of the section, the two reference holes are respectively arranged on the two wing shapes, and the position of the variable hole 3 is determined by optimization.
A design method for inhibiting RFQ frequency drift is disclosed, which comprises the following steps: adopting ANSYSY as simulation analysis software, firstly calculating the original frequency of an RFQ cavity 4 as C1, then calculating the thermal deformation of the cavity according to the actual cavity consumption, determining the cooling water temperature and the water flow, changing the frequency of the cavity into C2, determining the positions and the shapes of a first basic hole 1 and a second basic hole 2, and continuously optimizing the position of a 3-bit variable hole to ensure that C1 is C2, wherein the position of the 3-bit variable hole is the ideal position for realizing the frequency drift-free cavity.
The utility model discloses an optimize the overall arrangement of water hole on the RFQ cross-section and realize that RFQ cavity 4 is interior no frequency floats the design, and more specifically confirm RFQ cavity 4's consumption, definite operating temperature, definite discharge just can confirm the position of basic hole one 1 and basic hole two 2, through optimizing the position of variable hole 3, realize that the no frequency of cavity floats, and the result is accurate reliable, and the method is simple and easy.
The above, it is only the preferred embodiment of the present invention, not right the technical scope of the present invention makes any restriction, the technical personnel of the industry, under this technical scheme's enlightenment, can do some deformation and modification, all the basis the utility model discloses a technical essence is to any modification, the equivalent change and the modification of the above embodiment do, all still belong to the technical scheme's scope of the present invention.
Claims (5)
1. The utility model provides a can restrain water-cooling structure that RFQ cavity frequency drifted which characterized in that: the water cooling structure comprises a first base hole, a second base hole and a variable hole which are arranged on the RFQ cavity.
2. The water-cooling structure capable of suppressing RFQ cavity frequency drift as claimed in claim 1, wherein: the RFQ cavity is cylindrical as a whole, the cross section of the RFQ cavity is circular, four wing bodies are arranged in the RFQ cavity, the shape and the structure of the four wing bodies are the same, the four wing bodies are axially and radially symmetrical, and a cavity is formed between every two adjacent wing bodies.
3. The water-cooling structure capable of suppressing RFQ cavity frequency drift as claimed in claim 2, wherein: the cross section of each wing body is in an axial symmetry shape, two symmetrical wing shapes are arranged on two sides of the symmetry axis, and a first reference hole, a second reference hole and a variable hole which penetrate through the RFQ cavity in the axial direction are formed in each wing body.
4. The water-cooling structure capable of suppressing RFQ cavity frequency drift as claimed in claim 1 or 3, wherein: one basic hole on each wing body is positioned at a position close to the cross section of the RFQ cavity, and two basic holes are respectively positioned at the positions of two symmetrical wing bodies in the wing body.
5. The water-cooling structure capable of suppressing RFQ cavity frequency drift as claimed in claim 1 or 3, wherein: the variable orifice position is set at a position such that the RFQ cavity raw frequency is equal to the RFQ cavity actual frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120824571.2U CN214800003U (en) | 2021-04-21 | 2021-04-21 | Water cooling structure capable of inhibiting RFQ cavity frequency drift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120824571.2U CN214800003U (en) | 2021-04-21 | 2021-04-21 | Water cooling structure capable of inhibiting RFQ cavity frequency drift |
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| Publication Number | Publication Date |
|---|---|
| CN214800003U true CN214800003U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202120824571.2U Active CN214800003U (en) | 2021-04-21 | 2021-04-21 | Water cooling structure capable of inhibiting RFQ cavity frequency drift |
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| CN (1) | CN214800003U (en) |
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2021
- 2021-04-21 CN CN202120824571.2U patent/CN214800003U/en active Active
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