CN215616011U

CN215616011U - Monochromator polycrystal cooling mechanism based on eutectic bonding crystal

Info

Publication number: CN215616011U
Application number: CN202122441109.7U
Authority: CN
Inventors: 梁好; 杨光; 盛伟繁; 常广才; 李明; 刁千顺; 洪振; 岳帅鹏; 张珊; 卢远舒
Original assignee: Institute of High Energy Physics of CAS
Current assignee: Institute of High Energy Physics of CAS
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-01-25
Anticipated expiration: 2031-10-11

Abstract

The utility model discloses a monochromator polycrystalline cooling mechanism based on eutectic soldering crystals. The light beam is irradiated on one crystal to be diffracted, the position of the mechanism is moved, the light beam is irradiated on the other crystal, the crystal directions of the plurality of crystals are different, the energy of the obtained diffracted light beams is also different, and different experimental requirements can be met. According to the utility model, a plurality of crystals are spliced together in an eutectic welding manner, so that a better cooling effect is ensured, the overall quality of the device is reduced, the complexity of a cooling system is reduced, the stability of the device is improved, the stroke of crystal switching is reduced, the processing difficulty is reduced, and the maintainability is improved.

Description

Monochromator polycrystal cooling mechanism based on eutectic bonding crystal

Technical Field

The utility model belongs to the field of synchrotron radiation, and particularly relates to a monochromator polycrystalline cooling mechanism based on eutectic soldering crystals.

Background

The synchrotron radiation light source is a physical device for generating synchrotron radiation, and is a high-performance novel strong light source for generating synchrotron radiation when relativistic charged particles are deflected in a magnetic field. Synchrotron radiation crystal monochromators are devices that obtain monochromatic radiation by bragg diffraction of X-rays or neutrons from a crystal. The monochromator crystal generates a high amount of heat during operation and cooling of the crystal is required to ensure proper operation of the monochromator. The common cooling mode is that cooling copper blocks are arranged on two sides of the crystal, a cooling pipeline is arranged in each cooling copper block, liquid nitrogen is introduced into each pipeline, and the liquid nitrogen takes away heat converted by the X-ray absorbed by the crystal. In order to obtain monochromatic X-rays of different energies or different bandwidths to meet different experimental requirements, different crystals need to be switched. When a plurality of crystals need to be switched, a cooling copper block is arranged for each crystal in the traditional method, so that the whole mechanism is complex, the mass is large, and the natural frequency of the device is reduced. The liquid nitrogen pipeline is complicated, and the vibration problem caused by the liquid nitrogen is increased. The whole size of the mechanism is enlarged, the stroke for switching different crystals is large, and the additional stability problem is brought.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a monochromator multi-crystal cooling mechanism based on eutectic welding crystals, wherein a plurality of crystals are spliced together in an eutectic welding mode, the cooling structure is simplified, the quality of a crystal assembly is reduced, the processing difficulty is reduced, the complexity of a pipeline is reduced, the maintainability is improved, and the possibility of vacuum leakage is reduced. The switching stroke of the crystal is shortened, the switching time is reduced, and the crystal can be switched rapidly in a vacuum environment. Meanwhile, because the crystals are connected together in a eutectic welding mode, almost no thermal contact resistance exists, the heat transfer efficiency is high, the cooling effect is good, and the cooling performance is close to that of a single piece of monocrystalline silicon.

The technical scheme adopted by the utility model is as follows:

a monochromator polycrystalline cooling mechanism based on eutectic soldering crystals comprises a plurality of crystals with different crystal orientations, a cooling copper block, an indium sheet, a cooling pipe and a return pipe;

the plurality of crystals are spliced together; two sides of the spliced crystal are respectively provided with a cooling copper block, and a layer of indium sheet is arranged between each cooling copper block and the adjacent crystal; two ends of each cooling copper block are respectively connected with a cooling pipe and a return pipe for conveying liquid nitrogen, and the return pipes are respectively connected with the two cooling copper blocks; the plurality of crystals are spliced together by eutectic welding.

Further, the thickness of the indium sheet is 0.01 mm to 1 mm.

Further, the plurality of crystals are two crystals or more crystals with different crystal orientations.

The utility model has the following beneficial effects:

the utility model adopts the spliced crystal to replace a separate crystal, so that the whole structure is simplified, the quality of a crystal assembly is reduced, the processing difficulty is reduced, the complexity of a cooling system is reduced, the vibration source is reduced by half, the stability is improved, the maintainability is improved, and the possibility of vacuum leakage is reduced. The switching stroke of the crystal is shortened, the switching time is reduced, and the crystal can be switched rapidly in a vacuum environment. Meanwhile, because the crystals are connected together in a eutectic welding mode, almost no thermal contact resistance exists, the heat transfer efficiency is high, the cooling effect is good, and the cooling performance is close to that of a single crystal. The natural frequency of the system is improved, the sensitivity to vibration is reduced, and the manufacturing cost, the temperature and the surface type error in working are slightly different from the prior scheme.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the crystal switching process of the present invention;

wherein, fig. 2a is a working diagram of a first crystal, and fig. 2b is a working diagram of a second crystal;

FIG. 3 is a schematic diagram of the structure of the present invention when operating with four crystals.

Wherein: 1 is a cooling pipe, 2 is a cooling copper block, 3 is an indium sheet, 4 is a crystal II, 5 is a crystal I, and 6 is a return pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

FIG. 1 is a schematic view of the present invention;

as shown in fig. 1, a monochromator polycrystalline cooling mechanism based on eutectic bonding crystals comprises two crystals with different crystal orientations, a cooling copper block 2, an indium sheet 3, a cooling pipe 1 and a return pipe 6; two crystals with different crystal orientations, namely a crystal two 4 and a crystal one 5, for example, adopt silicon (111) and silicon (311) respectively, the crystal two 4 and the crystal one 5 are spliced together by eutectic welding to form a spliced crystal, and the crystal with the different crystal orientations is used as a first crystal of a monochromator after eutectic welding. The outer side of the spliced crystal is provided with a cooling copper block 2, the cooling copper block 2 is connected with a liquid nitrogen cooling pipeline, namely, the two crystals share one group of cooling system, so that the space is saved, the weight of the structure is reduced, and the stroke of crystal switching is shortened.

Splice crystal both sides with for better transfer heat between the cooling copper billet 2, place indium piece 3 that one deck thickness is 0.01 millimeter to 1 millimeter, it is right the cooling copper billet is from outside to crystal orientation exerting pressure, indium piece 3 fills the gap of cooling copper billet 2 and crystal contact surface under the pressure effect in order to increase actual area of contact, and the crystal absorbs the heat of X ray conversion and passes through the indium piece transmits the cooling copper billet. And two ends of the cooling copper block are respectively connected with a cooling pipe 1 and a return pipe 6 for conveying liquid nitrogen, and the liquid nitrogen is conveyed into the cooling copper block 2 through the cooling pipe 1 and circulates in the cooling copper block to take away heat transferred by crystals.

The cooling mechanism may be movable in a direction perpendicular to the crystal eutectic bonding plane. The direction of the incident synchrotron radiation beam line is unchanged, and when the whole mechanism is moved, the incident beam line is irradiated to different positions of the crystal as the position of the crystal is changed. After moving a certain distance, the light beam irradiates another crystal, reaches a proper position, stops moving, and then the crystal switching process is finished. The whole mechanism is moved reversely, and the original crystal is switched back. Fig. 2 is a schematic diagram of a crystal switching process according to the present invention, in which fig. 2a is a schematic diagram of a first operation of the crystal, and fig. 2b is a schematic diagram of a second operation of the crystal.

When a plurality of crystals participate in the work, only the moving mode of the cooling mechanism needs to be changed. When four crystals are spliced together, the cooling mechanism can move in the plane in which the crystals work. The position of the whole mechanism is changed through displacement in the transverse and vertical directions, so that incident light beam rays irradiate different crystals. Figure 3 is a schematic diagram of the structure of the present invention when operating with four crystals.

All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the above-described embodiments of the present invention, are within the scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the utility model as claimed, but is merely representative of selected embodiments of the utility model.

Claims

1. The utility model provides a monochromator polycrystal cooling body based on eutectic bonding crystal which characterized in that:

the mechanism comprises a plurality of crystals with different crystal directions, a cooling copper block, an indium sheet, a cooling pipe and a return pipe;

2. A monochromator multicrystal cooling mechanism based on eutectic solder crystals as claimed in claim 1, wherein:

the thickness of the indium sheet is 0.01 mm to 1 mm.

3. A monochromator multicrystal cooling mechanism based on eutectic solder crystals as claimed in claim 1, wherein:

the plurality of crystals are two or more crystals with different crystal orientations.