CN112911785A - Microwave power adjusting device, accelerator comprising same and adjusting method thereof - Google Patents
Microwave power adjusting device, accelerator comprising same and adjusting method thereof Download PDFInfo
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- CN112911785A CN112911785A CN202011613231.1A CN202011613231A CN112911785A CN 112911785 A CN112911785 A CN 112911785A CN 202011613231 A CN202011613231 A CN 202011613231A CN 112911785 A CN112911785 A CN 112911785A
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Abstract
The invention provides a microwave power regulating device, which comprises a circulator and a power regulator, wherein the circulator is configured to receive microwaves, output the microwaves to the power regulator and absorb the microwaves returned from the power regulator; the power regulator is coupled to the circulator and is configured to regulate a ratio between a power of the microwave output from the power regulator and a power of the microwave input to the power regulator. The embodiment of the invention can realize continuous adjustment of power, can realize continuous adjustment of the energy of the output ray of the accelerator when being applied to the accelerator, and is suitable for different application scenes. And under the premise of achieving the same function, the volume is smaller, and the whole machine synthesis is facilitated.
Description
Technical Field
The invention relates to the microwave-related field, in particular to a microwave power adjusting device, an accelerator comprising the same and a method for adjusting power through the microwave power adjusting device.
Background
With the development of science and technology, the electron linear accelerator is widely applied to the fields of medical treatment, irradiation, security inspection, nondestructive testing and scientific research. The power requirements of different application scenes on the accelerator are different, for example, the nondestructive testing accelerator also needs to select rays of corresponding power gears for photographing according to the thicknesses of different workpieces; the medical accelerator selects rays with different powers to treat according to different tumors of different parts. If the power of the accelerating tube is adjustable, the accelerating tube can be applied very flexibly, and the power adjustable accelerating tube has important practical value.
The current methods for adjusting the power of the linear electron accelerator include the following methods:
the first is to adjust the voltage of the pulse modulator to change the output power of the power source, thereby achieving the purpose of adjusting the accelerator power. This method has the disadvantage of a small power regulation range, especially when using a magnetron as the input power source.
The second method is to use an energy switch to detune the accelerating cavity behind the energy switch, so as to reduce the energy of the output ray of the accelerating tube.
The third way to realize the power adjustment is to use two accelerating tubes, and the power adjustment is realized by adjusting the power and phase of the second accelerating tube. The microwave system in this way is very complex, and the tuning difficulty of the two accelerating tubes is also very large.
The fourth common way is to adjust the power of the accelerating tube by changing the beam load, so as to increase the beam intensity, increase the load of the accelerating tube and reduce the power. This approach has many applications, but the acceleration tube current intensity is greatly changed for a wide range of changing electron energies, which has a large limitation for applications where the beam current size is required.
It is also a method to achieve adjustable energy of the accelerating tube by changing the power of the accelerating tube, and the most direct way is to install a high-power attenuator between the accelerating tube and the power source, and actually the application is also the same. Generally, the high power attenuator is complex in structure, and requires a separate water path to carry away the power of the attenuated microwave.
An example of a high power attenuator is shown in fig. 1a, which uses three 3dB couplers, the middle 3dB coupler connecting two adjustable short-circuited surfaces, as shown in fig. 1b, functioning as a phase shifter, and the other two 3dB couplers functioning as power splitting and power combining, respectively. The 3dB coupler can synthesize two paths of microwaves, and the synthesized power output is related to the phases of the two paths of microwaves. Through the control of the phase, the power of one output end can be adjusted, and the other end is connected with an absorption load, so that the power attenuation effect is achieved. The disadvantage is that the volume is overstaffed, the design of the whole machine is not facilitated, and the manufacturing cost is higher.
The statements in this background section merely represent techniques known to the public and are not, of course, representative of the prior art.
Disclosure of Invention
In view of at least one defect in the prior art, the invention provides a microwave power adjusting device, and an embodiment of the invention is applied to an accelerator complete machine system, so that the input power of an accelerating tube can be continuously adjusted, and the continuous adjustment of the energy of the output rays of an accelerator can be realized by matching with the design of the accelerating tube, so that the microwave power adjusting device is suitable for different application scenes. And under the premise of achieving the same function, the volume is smaller, and the whole machine synthesis is facilitated.
The invention provides a microwave power regulating device, which comprises a circulator and a power regulator, wherein the circulator is configured to receive microwaves, output the microwaves to the power regulator and absorb the microwaves returned from the power regulator; the power regulator is coupled to the circulator and is configured to regulate a ratio between a power of the microwave output from the power regulator and a power of the microwave input to the power regulator.
According to one aspect of the invention, wherein the circulator is a three-terminal circulator comprising a first port, a second port and a third port, wherein the first port is configured to receive microwaves; a second port is coupled with the power regulator and configured to output microwaves; the third port is coupled to an absorptive load configured to absorb microwaves returning from the power conditioner.
According to one aspect of the invention, the circulator is a four-port circulator comprising a first port, a second port, a third port and a fourth port, the first port being configured to receive microwaves; a second port is coupled with the power regulator and configured to output microwaves; a third port coupled to an absorbing load configured to absorb microwaves returning from the power conditioner; the fourth port is coupled to another absorbing load configured to absorb microwaves returning from the power conditioner.
According to one aspect of the invention, the power regulator comprises a first regulator port and a second regulator port, the first regulator port is coupled with the circulator and is configured to receive microwaves output by the first regulator port; the second regulator port is configured to output microwaves after the power is regulated.
According to an aspect of the invention, wherein the power conditioner further comprises a first short circuiting surface and a third conditioner port, the first short circuiting surface being provided at the third conditioner port and being configured to reflect microwaves incident on the first short circuiting surface back into the power conditioner, wherein a position of the first short circuiting surface with respect to the third port is adjustable to change a phase of the microwaves reflected by the first short circuiting surface.
According to an aspect of the invention, wherein the power conditioner further comprises a second shorting face and a fourth conditioner port, the second shorting face being disposed at the fourth conditioner port and configured to reflect microwaves incident on the second shorting face back into the power conditioner, wherein a position of the second shorting face relative to the fourth port is fixed.
According to an aspect of the present invention, wherein the microwave reflected by the first short-circuiting surface and the microwave reflected by the second short-circuiting surface have a phase difference, a ratio between a power of the microwave output from the power conditioner and a power of the microwave input to the power conditioner is determined by the phase difference.
The invention also provides a power-adjustable accelerator, which comprises a magnetron configured to emit microwaves; an electron gun configured to emit an electron beam; an accelerating tube configured to receive microwaves to establish an accelerating electromagnetic field, receive the electron beam and accelerate it by the accelerating electromagnetic field; and the microwave power adjusting device is coupled between the magnetron and the accelerating tube and is configured to transmit microwaves and adjust the power of the microwaves.
According to one aspect of the invention, the accelerator further comprises a directional coupler coupled between the power conditioner and the acceleration tube, configured to measure incident microwaves and reflected microwaves, and monitor an operating state of the acceleration tube.
According to an aspect of the invention, wherein the acceleration tube is a standing wave acceleration tube.
The invention also provides a method for regulating microwave power, which is implemented by using the microwave power regulating device.
The features and advantages described in the specification are not all inclusive and, in particular, many additional features and advantages will be apparent to one of ordinary skill in the art in view of the drawings and specification. Moreover, it should be noted that the terminology used in the description has been chosen primarily for readability and instructional purposes, and may not have been chosen to delineate or circumscribe the inventive subject matter.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure. In the drawings:
FIG. 1a shows a schematic diagram of a high power microwave attenuator;
FIG. 1b shows a schematic diagram of FIG. 1 a;
FIG. 2a shows a schematic diagram of a microwave power conditioning apparatus in accordance with an embodiment of the present invention;
FIG. 2b shows a schematic diagram of a microwave power conditioning apparatus according to another embodiment of the present invention;
FIG. 3 shows a schematic diagram of a power regulator of one embodiment of the present invention;
FIG. 4A shows a power regulator simulation diagram of one embodiment of the present invention;
FIG. 4B shows a plot of the relative proportion of power output from the first regulator port versus the relative proportion of power output from the second regulator port as a function of the position of the first shorting face; and
fig. 5 shows a schematic diagram of a power tunable accelerator according to the present invention.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection, either mechanically, electrically, or in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
The invention provides a microwave power adjustable device, which changes the proportion of input microwave power and output microwave power by controlling phase position so as to adjust the output microwave power. The microwave power adjustable device is applied to a microwave system, and the function of adjusting high-power microwaves can be realized. The High-Power Microwave (HPM) is one kind of strong electromagnetic pulse, the frequency range is 1 GHz-300 GHz, and the peak Power is higher than 100 MW. HPM has the characteristics of high frequency, short pulse (tens of nanoseconds), high power, etc., and is an important form of strong electromagnetic pulse.
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The present invention provides a microwave power conditioning apparatus 100, as shown in fig. 2, comprising a circulator 1001 and a power conditioner 1002, wherein the circulator 1001 is configured to receive microwaves and output the microwaves to the power conditioner 1002, and absorb the microwaves returned from the power conditioner 1002;
the power conditioner 1002 is coupled to the circulator 1001, and is configured to adjust a ratio between the power of the microwave output from the power conditioner 1002 and the power of the microwave input to the power conditioner 1002, and by adjusting the ratio, the power of the microwave output from the power conditioner 1002 can be changed.
According to a preferred embodiment of the present invention, as shown in fig. 2a, wherein the circulator 1001 is a three-port circulator, and comprises a first port Q1, a second port Q2 and a third port Q3, wherein the first port Q1 is an input port for receiving microwaves; a second port Q2 is an output port, coupled to the power regulator 1002, for outputting microwaves; the third port Q3 is coupled to a sinking load 1003 configured to sink microwaves returning from the power regulator 1002.
According to a preferred embodiment of the present invention, as shown in fig. 2b, wherein the circulator 1001 is a four-port circulator, and comprises a first port Q1, a second port Q2, a third port Q3 and a fourth port Q4, the first port Q1 is an input end for receiving microwaves; a second port Q2 is an output port, coupled to the power regulator 1002, for outputting microwaves; the third port Q3 is coupled to a sinking load 1003 configured to sink microwaves returned from the power conditioner 1002; the fourth port Q4 is coupled to another absorbing load 1004 configured to absorb microwaves returning from the power conditioner 1002.
In the microwave power conditioning apparatus 100, the circulator 1001 may perform the function of unidirectional conduction, that is, the microwave can only be transmitted from the left side to the right side in fig. 2a and 2b, and the microwave returning from the right side will be absorbed by the absorbing load and will not return to the microwave source on the left side.
Preferably, the absorption load 1003 and the absorption load 1004 are absorption matching loads, and may adopt a dry load or a water load or other forms for absorbing the microwave power returned from the power regulator 1002, and may be selected or replaced according to actual needs, and all of them are within the protection scope of the present invention.
Fig. 3 shows a schematic diagram of a power regulator 1002 according to one embodiment of the invention. As shown in fig. 3, the power regulator 1002 includes a first regulator port P1 and a second regulator port P2, the first regulator port P1 is coupled to the second port Q2 of the circulator 1001 and configured to receive microwaves output therefrom; the second regulator port P2 is configured to output microwaves after the power is regulated.
The power conditioner 1002 further includes a first short-circuiting surface S1 (see fig. 2a and 2b) and a third conditioner port P3, the first short-circuiting surface S1 being provided at the third conditioner port P3 and configured to reflect the microwaves incident on the first short-circuiting surface S1 back into the power conditioner 1002, wherein a position of the first short-circuiting surface S1 with respect to the third port P3 is adjustable, as shown in fig. 2a and 2b, and the first short-circuiting surface S1 is moved left and right in a direction indicated by an arrow in the drawing to change a phase of the microwaves reflected by the first short-circuiting surface S1. In addition, the first short-circuiting surface S1 may be disposed inside the third regulator port P3 or outside the third regulator port P3, which are within the scope of the present invention.
Preferably, the first short-circuiting surface S1 may be implemented by a short-circuiting piston axially movable with respect to the third regulator port P3. Specifically, the short-circuit piston comprises a sliding block and a pull rod, and the moving mode can be realized by manual adjustment or control of a driving motor. Other forms may be adopted to realize the function of reflecting the microwave, and are within the protection scope of the present invention.
The power regulator 1002 further includes a second shorting face (not shown) disposed at the fourth regulator port P4 and configured to reflect microwaves incident on the second shorting face back into the power regulator 1002, wherein the position of the second shorting face relative to the fourth port P4 is fixed, and a fourth regulator port P4.
Preferably, the second short-circuit surface may be a metal sheet or a metal block fixed at the fourth adjuster port P4 to implement a function of reflecting microwaves, and may also take other forms, all of which are within the protection scope of the present invention.
When microwaves are fed through the first regulator port P1, the microwaves are transmitted to the third regulator port P3 and the fourth regulator port P4 and are reflected by the first short-circuit surface S1 and the second short-circuit surface, respectively, wherein the microwaves reflected by the first short-circuit surface S1 and the microwaves reflected by the second short-circuit surface have a phase difference, the phase is controlled by adjusting the position of the first short-circuit surface S1, so that the power output from the second regulator port P2 is adjustable, and the power returned from the first regulator port P1 to the circulator 1001 is absorbed by an absorption load of the circulator.
The power regulator 1002 in the above embodiment is a four-port device, and the ratio of the input microwave power and the output microwave power is changed by controlling the phase, so as to regulate the output microwave power. Preferably, a three-port or multi-port device comprising one or more adjustable shorting planes may also be used to achieve the same function, all within the scope of the present invention.
Fig. 4A shows a simulation diagram of the power conditioner 1002 according to an embodiment of the present invention, and fig. 4B shows a graph in which the relative proportion of power output from the first conditioner port P1 and the relative proportion of power output from the second conditioner port P2 vary with the position of the first short-circuiting surface S1. As shown in fig. 4B, by changing the position of the first short-circuiting surface S1 of the third regulator port P3, the ratio of the input microwave power and the output microwave power can be adjusted. As shown in fig. 4B, the abscissa of the simulation curve is the displacement of the first adjustable short-circuiting surface S1, and the ordinate is the relative power (or power ratio), where one curve is the ratio S11S 11 of the reflected power from the first regulator port P1, and the other curve is the relative ratio S12S 12 of the output power from the second regulator port P2, and at the displacement of any first short-circuiting surface S1, the sum of the two is 1, and S11S 11+ S12S 12 is 1, that is, the microwave power entering the first regulator port P1 may all return to the first regulator port P1, may all go to the second regulator port P2, or may be distributed to the first regulator port P1 and the second regulator port P2 in any ratio along with the adjustment of the first short-circuiting surface. Therefore, the effect of the technical scheme of the embodiment is verified.
The present invention also provides a power adjustable accelerator 10, as shown in fig. 5, comprising a magnetron 101 configured to emit microwaves; an electron gun 102 configured to emit an electron beam; an acceleration tube 103 configured to receive microwaves to establish an accelerating electromagnetic field, receive electron beams and accelerate them by the accelerating electromagnetic field; and a microwave power adjusting apparatus 100 as described above, coupled between the magnetron 101 and the accelerating tube 103, configured to transmit microwaves and adjust power of the microwaves.
According to a preferred embodiment of the present invention, the accelerator 10 further comprises a directional coupler 104 coupled between the power regulator 1002 and the acceleration tube 103, configured to measure incident microwaves and reflected microwaves, and monitor the operating state of the acceleration tube 103.
Specifically, high power microwaves are generated by the magnetron 101, enter the power regulator 1002 through the circulator 1001, and then part of the power is reflected back to the circulator 1001 and part enters the accelerating tube 103 through the directional coupler 104. The power entering the acceleration tube 103 can be varied by adjusting the position of the first short-circuiting surface of the power conditioner 1002. The electron gun 102 generates an electron beam while the microwaves enter the acceleration tube 103, and is accelerated to a predetermined energy after entering the acceleration tube 103.
Preferably, the power regulator 1002 may be a two-port microwave device modified from a 3dB coupler, wherein the first port is connected to the circulator 1001 and is a microwave power inlet; the second port is connected with the inlet of the accelerating tube 103 through a directional coupler 104. Before modification, the third port (corresponding to the fourth adjuster port P4 above) of the 3dB coupler is connected to the fixed short-circuit surface; the added fourth port is connected to an adjustable short-circuiting surface (corresponding to the third regulator port P3 above). In the case that the input power of the first port is P, when the position of the adjustable short-circuit surface S1 of the fourth port is adjusted, the output power of the second port can be continuously changed from 0-P.
The power regulator 1002 is required to cooperate with the circulator 1001 to adjust the adjustable short-circuit of the fourth port, so that a part of the power is returned to the first port. This power is returned to circulator 1001 and is absorbed by the absorbing load of circulator 1001. The function of power regulator 1002 is to allow the power entering it to be partially transmitted, partially reflected, and the ratio of the two portions to be adjustable. Therefore, the required functions and smaller volume can be achieved by minimum change, and the synthesis of the whole machine is facilitated.
Preferably, the accelerating tube is a standing wave accelerating tube.
The present invention also provides a method of regulating microwave power, implemented using the microwave power regulating device 100 as described above.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A microwave power regulator comprises a circulator and a power regulator,
wherein the circulator is configured to receive microwaves and output the microwaves to the power conditioner, and absorb microwaves returned from the power conditioner;
the power regulator is coupled to the circulator and is configured to regulate a ratio between a power of the microwave output from the power regulator and a power of the microwave input to the power regulator.
2. The microwave power conditioning device of claim 1, wherein the circulator is a three-terminal circulator comprising a first port, a second port, and a third port, wherein the first port is configured to receive microwaves; a second port is coupled with the power regulator and configured to output microwaves; the third port is coupled to an absorptive load configured to absorb microwaves returning from the power conditioner.
3. The microwave power conditioning unit of claim 1, wherein the circulator is a four-port circulator comprising a first port configured to receive microwaves, a second port, a third port, and a fourth port; a second port is coupled with the power regulator and configured to output microwaves; a third port coupled to an absorbing load configured to absorb microwaves returning from the power conditioner; the fourth port is coupled to another absorbing load configured to absorb microwaves returning from the power conditioner.
4. The microwave power conditioning device of claim 1, wherein the power conditioner includes a first conditioner port and a second conditioner port, the first conditioner port coupled to the circulator and configured to receive microwaves output therefrom; the second regulator port is configured to output microwaves after the power is regulated.
5. The microwave power conditioning device of claim 4, wherein the power conditioner further comprises a first shorting surface and a third conditioner port, the first shorting surface being disposed at the third conditioner port and configured to reflect microwaves incident on the first shorting surface back into the power conditioner, wherein a position of the first shorting surface relative to the third port is adjustable to change a phase of the microwaves reflected by the first shorting surface.
6. The microwave power conditioning device of claim 5, wherein the power conditioner further comprises a second shorting face and a fourth conditioner port, the second shorting face disposed at the fourth conditioner port and configured to reflect microwaves incident on the second shorting face back into the power conditioner, wherein a position of the second shorting face relative to the fourth port is fixed.
7. The microwave power adjusting apparatus of claim 6, wherein the microwave reflected by the first short-circuiting surface and the microwave reflected by the second short-circuiting surface have a phase difference by which a ratio between a power of the microwave output from the power adjuster and a power of the microwave input to the power adjuster is determined.
8. An accelerator with adjustable power comprises
A magnetron configured to emit microwaves;
an electron gun configured to emit an electron beam;
an accelerating tube configured to receive microwaves to establish an accelerating electromagnetic field, receive the electron beam and accelerate it by the accelerating electromagnetic field; and
the microwave power conditioning device of any of claims 1-7, coupled between the magnetron and the accelerating tube, configured to transmit microwaves and condition the power of the microwaves.
9. The accelerator of claim 8, further comprising a directional coupler coupled between the power conditioner and the acceleration tube, configured to measure incident microwaves and reflected microwaves, and monitor an operating state of the acceleration tube.
10. An accelerator according to claim 8 or 9, wherein the accelerating tube is a standing wave accelerating tube.
11. A method of regulating microwave power, carried out using a microwave power regulating device as claimed in any one of claims 1 to 7.
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| CN202011613231.1A CN112911785A (en) | 2020-12-30 | 2020-12-30 | Microwave power adjusting device, accelerator comprising same and adjusting method thereof |
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| CN202011613231.1A CN112911785A (en) | 2020-12-30 | 2020-12-30 | Microwave power adjusting device, accelerator comprising same and adjusting method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143952A (en) * | 2021-11-19 | 2022-03-04 | 清华大学 | Disc type 3dB flow mixer and electronic linear accelerator |
| CN114513871A (en) * | 2022-04-21 | 2022-05-17 | 三微电子科技(苏州)有限公司 | Microwave power adjusting method and device, electronic equipment and storage medium |
| CN116634651A (en) * | 2023-05-10 | 2023-08-22 | 泛华检测技术有限公司 | Mobile electron irradiation accelerator and method thereof |
-
2020
- 2020-12-30 CN CN202011613231.1A patent/CN112911785A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114143952A (en) * | 2021-11-19 | 2022-03-04 | 清华大学 | Disc type 3dB flow mixer and electronic linear accelerator |
| CN114513871A (en) * | 2022-04-21 | 2022-05-17 | 三微电子科技(苏州)有限公司 | Microwave power adjusting method and device, electronic equipment and storage medium |
| CN114513871B (en) * | 2022-04-21 | 2022-07-12 | 三微电子科技(苏州)有限公司 | Microwave power adjusting method and device, electronic equipment and storage medium |
| CN116634651A (en) * | 2023-05-10 | 2023-08-22 | 泛华检测技术有限公司 | Mobile electron irradiation accelerator and method thereof |
| CN116634651B (en) * | 2023-05-10 | 2023-12-29 | 泛华检测技术有限公司 | Mobile electron irradiation accelerator and method thereof |
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