Direct current beam cutting device based on sine wave waveform
阅读说明：本技术 一种基于正弦波波形的直流束流切割装置 (Direct current beam cutting device based on sine wave waveform ) 是由 黄鹏 宋国芳 侯世刚 曹磊 贾先禄 安世忠 张贺 王景峰 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种基于正弦波波形的直流束流切割装置,该切割装置包括螺旋谐振器、束流切割极板装置；所述的螺旋谐振器用于为束流切割极板装置提供高频电压、所述束流切割极板装置用于提供束流通过和束流偏转的交变电场；所述的螺旋谐振器包括用于精确固定螺旋谐振器固有频率的电容微调极板、用于调整耦合线圈谐振频率的耦合线圈调节支架、用于保持线圈圈间距恒定不变以及保证每匝线圈线直径不变的螺线管线圈支撑骨架。发明解决了本领域长期以来未能实现谐振器高精度固有频率的技术难题：将电容微调极板、耦合线圈调节支架、螺线管线圈支撑骨架三者有机结合,相互支持、相互依存,从而解决了仅从一个方面解决问题不能实现高精度固有频率的难题。(The invention discloses a direct current beam cutting device based on sine wave waveforms, which comprises a spiral resonator and a beam cutting polar plate device, wherein the spiral resonator is arranged on the beam cutting polar plate device; the spiral resonator is used for providing high-frequency voltage for the beam cutting polar plate device, and the beam cutting polar plate device is used for providing alternating electric fields for beam passing and beam deflection; the spiral resonator comprises a capacitance fine-tuning polar plate for accurately fixing the natural frequency of the spiral resonator, a coupling coil adjusting bracket for adjusting the resonant frequency of the coupling coil, and a solenoid coil supporting framework for keeping the distance between coil coils constant and ensuring the diameter of each coil to be constant. The invention solves the technical problem that the high-precision natural frequency of the resonator can not be realized in the field for a long time: the capacitance fine-tuning pole plate, the coupling coil adjusting bracket and the solenoid coil supporting framework are organically combined and mutually supported and interdependent, so that the problem that the high-precision natural frequency cannot be realized only by solving the problem from one aspect is solved.)
1. A direct current beam cutting device based on sine wave waveform comprises a spiral resonator and a beam cutting polar plate device; the spiral resonator is used for providing high-frequency voltage for the beam cutting polar plate device, and the beam cutting polar plate device is used for providing alternating electric fields for beam passing and beam deflection; the method is characterized in that: the spiral resonator comprises a capacitance fine-tuning polar plate for accurately fixing the natural frequency of the spiral resonator, a coupling coil adjusting bracket for adjusting the resonant frequency of the coupling coil, and a solenoid coil supporting framework for keeping the distance between coil coils constant and ensuring the diameter of each coil to be constant.
2. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the spiral resonator comprises a power feed-in port, a coupling ring, a solenoid coil and a shielding shell, and also comprises a solenoid line capacitance fine-tuning polar plate, a coupling ring bracket, a solenoid coil supporting framework and a water-cooling loop; the power feed port provides a high frequency voltage input to the resonator, and the coupling loop receives and couples the high frequency voltage to the solenoid coil; the equivalent resonance amplification loop of the solenoid coil is used for amplifying a high-frequency voltage amplitude; the capacitance fine tuning pole plate is used for accurately fixing the natural frequency of the resonator by adjusting the distance between the pole plate and the outer wall of the coil; the solenoid coil supporting framework keeps the coil spacing constant and ensures the diameter of each turn of coil to be constant by effectively supporting the solenoid coil; the coupling ring adjusting bracket meets the requirement of high-frequency resonance by adjusting the telescopic length of the bracket; the water-cooling loop is sleeved in the hollow tube of the solenoid coil to carry out water-cooling on the coil and is used for high-power application occasions.
3. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the outer diameters of the coupling ring and the solenoid coil are equal, the centers of the coupling ring and the solenoid coil are on the same straight line, and the distance between the coupling ring and the solenoid coil is required to be 45-55 mm; the coupling ring is additionally provided with a support made of polytetrafluoroethylene materials at a non-interface end, the support has a front-back telescopic function, the coil can move within a range of about 1cm by adjusting the telescopic length of the support, and therefore the coupling degree is adjusted so as to achieve all feed-in of input power.
4. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the diameter and the coil spacing of the solenoid coil are kept constant in the winding process, so that the springback of the coil needs to be considered in the winding process, the diameter of the coil needs to be slightly smaller than a target diameter during initial winding, and the diameter of a selected die is slightly smaller than the target diameter of the coil; in addition, in order to fix the coil and keep the distance between the coils constant, the coil is fixed by a Teflon support framework.
5. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the spiral resonator also comprises a capacitance fine tuning polar plate device, and the capacitance fine tuning polar plate device is used for making up the deficiency of inductance adjustment on the natural frequency of the spiral resonator and fine tuning the frequency of the spiral resonator; the spiral resonator is ensured to work at a target frequency finally by adjusting the distance between the fine tuning capacitor polar plate and the solenoid coil; the capacitor fine tuning pole plate device is connected with the side wall of the shielding shell.
6. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the capacitance fine-tuning pole plate device comprises a capacitance fine-tuning pole plate, an adjusting rod, a graduated scale, a positive limit switch, a negative limit switch, an adjusting button and an adjusting screw, wherein the capacitance fine-tuning pole plate, the adjusting rod, the graduated scale, the positive limit switch, the negative limit switch, the adjusting button and the adjusting screw are divided into two parts which are arranged inside and outside the; the capacitance fine-tuning polar plate is arranged in the spiral resonator, is parallel to the side wall of the spiral resonator, and is connected with an adjusting frame, a graduated scale, a positive and negative limit switch, an adjusting button and an adjusting screw outside the spiral resonator through an adjusting rod; the adjusting rod penetrates through the inside and outside of the side wall of the spiral resonator along the direction perpendicular to the side wall of the spiral resonator, the part of the adjusting rod extending out of the shielding shell is arranged in the adjusting frame, the left side and the right side of the adjusting rod are respectively provided with a graduated scale and an adjusting screw, the adjusting frame is also provided with positive and negative limit switches at certain intervals, an adjusting button for driving the adjusting rod to move up and down is arranged on the adjusting rod in the adjusting frame, and one side of the adjusting rod, which is opposite to the graduated scale, is also provided with an adjusting screw which is used for fixing the current stroke position of; the trimming plates cannot be too close to touch the solenoid coil and set to a maximum stroke of
7. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the beam cutting polar plate is divided into an upper polar plate and a lower polar plate, the distance between the upper polar plate and the lower polar plate is adjustable within the range of 30-50 mm, the upper polar plate is connected with a solenoid coil through a coaxial feed tube through a vacuum electrode feed through, and the lower polar plate is connected with the shell of the cutter and is grounded. The peak value of the high-frequency voltage loaded on the beam cutting polar plate through the spiral resonator can reach 12KV, and the frequency of the high-frequency voltage is 1-3 MHz.
8. The sine wave waveform-based direct current beam current cutting device according to claim 1, wherein: the coupling ring adjusting bracket comprises an adjusting knob, a threaded telescopic rod and a fixing screw; one end of the threaded telescopic rod is fixedly connected with the coupling ring, the other end of the threaded telescopic rod is fixedly connected with the adjusting knob, the threaded telescopic rod is controlled to move through the positive and negative rotation of the adjusting knob, and the threaded telescopic rod drives the coupling ring to move back and forth, so that the front and back positions of the coupling ring can be adjusted through the coupling ring adjusting support.
Technical Field
The invention belongs to the field of accelerators, and particularly relates to a direct current beam cutting device based on a sine wave waveform.
Background
In the field of accelerator technology, the temporal structure of the beam is generally determined by the different accelerator types. For example, a continuous dc beam accelerated by a high pressure type accelerator will result in a continuous dc beam, while a continuous dc beam accelerated by a cyclotron will result in a quasi-continuous beam with very high frequency. In some specific experiments such as nuclear data measurement, neutron physical test and material characteristic research, a pulse beam with a specific time structure and a specific repetition frequency is required. To obtain a beam with a specific repetition frequency and a specific pulse width, the injected dc beam needs to be pulsed and then accelerated by an accelerator. In a dc beam pulsing system, a continuous dc beam can be shaped into a pulsed beam with a specific temporal structure and width using a chopper.
Disclosure of Invention
The invention provides a direct current beam cutting device based on sine wave waveforms, aiming at solving the problems that the spiral resonator in the prior art cannot ensure high precision of inherent frequency and the diameter and the coil distance are constant in the coil winding and fixing processes of the spiral resonator.
The invention adopts the following technical scheme for solving the technical problems:
a direct current beam cutting device based on sine wave waveform comprises a spiral resonator and a beam cutting polar plate device; the spiral resonator is used for providing high-frequency voltage for the beam cutting polar plate device, and the beam cutting polar plate device is used for providing alternating electric fields for beam passing and beam deflection; the method is characterized in that: the spiral resonator comprises a capacitance fine-tuning polar plate for accurately fixing the natural frequency of the spiral resonator, a coupling coil adjusting bracket for adjusting the resonant frequency of the coupling coil, and a solenoid coil supporting framework for keeping the distance between coil coils constant and ensuring the diameter of each coil to be constant.
The spiral resonator comprises a power feed-in port, a coupling coil, a solenoid coil and a shielding shell, and also comprises a solenoid line capacitance fine-tuning polar plate, a coupling coil bracket, a solenoid coil supporting framework and a water-cooling loop; the power feed port provides a high frequency voltage input to the resonator, and the coupling coil receives and couples the high frequency voltage to the solenoid coil; the solenoid coil and the equivalent capacitor form a resonance amplification loop for amplifying the high-frequency voltage amplitude; the capacitance fine tuning polar plate is used for accurately fixing the natural frequency of the resonator by adjusting the distance between the polar plate and the coil; the solenoid coil supporting framework keeps the coil spacing constant and ensures the diameter of each turn of coil to be constant by effectively supporting the solenoid coil; the coupling coil adjusting bracket meets the requirement of high-frequency resonance by adjusting the telescopic length of the bracket; the water-cooling loop is sleeved in the hollow tube of the solenoid coil to carry out water-cooling on the coil and is used for high-power application occasions.
The outer diameters of the coupling coil and the solenoid coil are equal, the centers of the two coils are on the same straight line, and the distance between the coupling coil and the solenoid coil is required to be 45-55 mm; the coupling coil is additionally provided with a support made of polytetrafluoroethylene materials at a non-interface end, the support has a front-back telescopic function, the coil can move within a range of about 1cm by adjusting the telescopic length of the support, and therefore the coupling degree is adjusted so as to achieve all feed-in of input power.
The diameter and the coil spacing of the solenoid coil are kept constant in the winding process, so that the springback of the coil needs to be considered in the winding process, the diameter of the coil needs to be slightly smaller than a target diameter during initial winding, and the diameter of a selected die is slightly smaller than the target diameter of the coil; in addition, in order to fix the coil and keep the distance between the coils constant, the coil is fixed by a Teflon support framework.
The spiral resonator also comprises a capacitance fine tuning polar plate device, and the capacitance fine tuning polar plate device is used for making up the deficiency of inductance adjustment on the natural frequency of the spiral resonator and fine tuning the frequency of the spiral resonator; the spiral resonator is ensured to work at a target frequency finally by adjusting the distance between the fine tuning capacitor polar plate and the solenoid coil; the capacitor fine tuning pole plate device is connected with the side wall of the shielding shell.
The capacitance fine-tuning pole plate device comprises a capacitance fine-tuning pole plate, an adjusting rod, a graduated scale, a positive limit switch, a negative limit switch, an adjusting button and an adjusting screw, wherein the capacitance fine-tuning pole plate, the adjusting rod, the graduated scale, the positive limit switch, the negative limit switch, the adjusting button and the adjusting screw are divided into two parts which are arranged inside and outside the; wherein, the capacitor fine tuning polar plate is arranged in the spiral resonator, is parallel to the side wall of the spiral resonator and is connected with the adjusting frame, the graduated scale, the positive and negative limit switches and the adjusting button outside the spiral resonator through the adjusting rodThe adjusting screw is connected; the adjusting rod penetrates through the inside and outside of the side wall of the spiral resonator along the direction perpendicular to the side wall of the spiral resonator, the part of the adjusting rod extending out of the shielding shell is arranged in the adjusting frame, the left side and the right side of the adjusting rod are respectively provided with a graduated scale and an adjusting screw, the adjusting frame is also provided with positive and negative limit switches at certain intervals, an adjusting button for driving the adjusting rod to move up and down is arranged on the adjusting rod in the adjusting frame, and one side of the adjusting rod, which is opposite to the graduated scale, is also provided with an adjusting screw which is used for fixing the current stroke position of; the trimming plates cannot be too close to touch the solenoid coil and set to a maximum stroke of
The beam cutting polar plate is divided into an upper polar plate and a lower polar plate, the distance between the upper polar plate and the lower polar plate is adjustable within the range of 30-50 mm, the upper polar plate is connected with a solenoid coil through a coaxial feed tube through a vacuum electrode feed through, and the lower polar plate is connected with the shell of the cutter and is grounded. The peak value of the high-frequency voltage loaded on the beam cutting polar plate through the spiral resonator can reach 12KV, and the frequency of the high-frequency voltage is 1-3 MHz.
The coupling ring adjusting bracket comprises an adjusting knob, a threaded telescopic rod and a fixing screw; one end of the threaded telescopic rod is fixedly connected with the coupling ring, the other end of the threaded telescopic rod is fixedly connected with the adjusting knob, the threaded telescopic rod is controlled to move through the positive and negative rotation of the adjusting knob, and the threaded telescopic rod drives the coupling ring to move back and forth, so that the front and back positions of the coupling ring can be adjusted through the coupling ring adjusting support.
Advantageous effects of the invention
1. The invention adopts Teflon to fix the solenoid coil, thereby not only realizing the structural stability of the solenoid coil, but also ensuring the constant space between the coil coils.
2. The invention adopts the capacitance trimming polar plate to trim the capacitance of the spiral resonator, ensures that the inherent frequency of the spiral resonator is fixed and unchanged with high precision, and solves the problems that the inherent frequency can only be fixed in a coarse range and is not high in precision because the inherent frequency is adjusted by the number of turns of the coil in the prior art.
3. The invention solves the technical problem that the high-precision natural frequency of the resonator can not be realized in the field for a long time: combine electric capacity fine setting polar plate, coupling coil adjusting bracket, solenoid coil support skeleton three, mutual support, interdependence to solved only from the difficult problem that the high accuracy natural frequency can not be realized to the aspect solution problem, specifically do: the resonance frequency is adjusted through the coupling coil adjusting bracket, so that the requirement of sine wave high-frequency resonance is met, and a foundation is laid for fine adjustment of the frequency of the capacitor C; the solenoid coil supporting framework ensures the constant pitch and diameter of the coil, so that the inductance L parameter meets the requirement of high-precision natural frequency; the distance between the polar plate and the outer wall of the coil is adjusted through the capacitance fine adjustment polar plate, and the problem that the inherent frequency can only be guaranteed to be unchanged in a large range by simply adjusting the number of turns of the coil, but the adjustment cannot be performed on the precision smaller than one number of turns is solved. Through the synergistic solution of the three problems, the high-precision natural frequency of the direct current beam cutting device based on the sine wave waveform is finally realized.
Drawings
FIG. 1a is a schematic view of a prior art beam cutting apparatus;
FIG. 1b is a schematic view of a beam cutting apparatus according to the present invention;
FIG. 2 is an enlarged view A of FIG. 1 b;
FIG. 3 is a cross-sectional view of the inner tube structure of the outer tube sleeve of the solenoid coil copper tube and water cooled piping;
FIG. 4 is a cross-sectional view of a solenoid coil support armature;
FIG. 5 is a coupling coil adjustment bracket;
in fig. 1, 1: a feed-in port; 2: a coupling ring; 3: a solenoid coil; 3-1: a copper tube of the solenoid coil; 3-2, water cooling pipeline water inlet pipe; 3-3, a water outlet pipe of the water cooling pipeline; 4: a shielding housing; 5: a coaxial feed tube; 6: a vacuum electrode; 7. 8: cutting the polar plate; 9: cutting the polar plate shell; 10: a capacitance trimming plate; 11. a solenoid support armature; 12: a coupling coil adjusting bracket;
10: a capacitance trimming plate; 10-1: adjusting a rod; 10-2: a positive limit switch; 10-3: a negative limit switch; 10-4: an adjusting knob; 10-5: adjusting screws; 10-6, a graduated scale; 11: a solenoid coil support armature; 12: the coupling coil adjusts the support.
11-1: a solenoid supporting armature upper half; 11-2: the lower half part of the solenoid coil supporting framework; 11-3: copper tube cross-section of solenoid coil.
12-1: adjusting the knob; 12-2: a threaded telescopic rod; 12-3: and fixing the screw.
Detailed Description
Design principle of the invention
Three difficulties need to be solved simultaneously to realize high-precision natural frequency. The first difficulty is: because the coupling ring of the feed-in port is not in direct contact with the solenoid coil but in air contact with the solenoid coil, 100% of power is difficult to feed into the solenoid coil, when the power cannot be completely fed, the power is not helpful even if a capacitor plate is adopted for fine frequency adjustment later and the distance and the diameter of the coil are constant through a fixing device, because the power does not reach the design standard from the feed-in port, the basis is not available, and all the operation later is useless; the second difficulty is that even if the feed-in port feeds power into the coil by 100%, because the natural frequency is related to the number of turns N of the inductor L, and the number of turns N is an integer, not a decimal, when the natural frequency is affected by less than 1 change of the number of turns, the accuracy of the natural frequency cannot be ensured by adjusting the number of turns; the third difficulty: even if the feed-in port feeds power 100% in, the natural frequency is also finely adjusted through the capacitor plate, but the coil is deformed due to the uneven distance of the spiral coil, the wire diameter Dd of each small circular coil is changed due to the deformation of the coil, the inductance L is changed due to the change of the diameter Dd, and the natural frequency is changed due to the change of the inductance according to a formula. Therefore, three problems must be solved at the same time to ensure high accuracy of the natural frequency.
Based on the principle of the invention, the invention designs a direct current beam cutting device based on sine wave waveform
A sine wave waveform based direct current beam cutting device is shown in fig. 1b, and comprises a spiral resonator and a beam cutting polar plate device; the spiral resonator is used for providing high-frequency voltage for the beam cutting polar plate device, and the beam cutting polar plate device is used for providing alternating electric fields for beam passing and beam deflection; the method is characterized in that: the spiral resonator comprises a capacitance fine-tuning
As shown in fig. 1b, the spiral resonator includes a power feed port 1, a coupling coil 2, a solenoid coil 3, a shielding case 4, a solenoid coil capacitance trimming pole plate 10, a coupling coil support 12, a solenoid coil support frame 11, and a water cooling loop (3-2, 3-3 of fig. 3); the power feed-in port 1 provides high-frequency voltage input for the resonator, and the coupling coil 2 receives the high-frequency voltage and couples the high-frequency voltage to the solenoid coil 3; the solenoid coil 3 and the equivalent capacitor form a resonance amplification loop for amplifying a high-frequency voltage amplitude; the capacitance fine tuning polar plate 10 is used for accurately fixing the natural frequency of the resonator by adjusting the distance between the polar plate and the coil outer wall 3; the solenoid coil supporting framework 11 effectively supports the solenoid coil 3 to keep the coil spacing constant and ensure that the diameter of each turn of coil is constant; the coupling coil adjusting bracket 12 meets the requirement of high-frequency resonance by adjusting the telescopic length of the bracket; the water cooling loops (3-2 and 3-3 in figure 3) are sleeved in the hollow tube of the solenoid coil to carry out water cooling on the coil, and are used for high-power application occasions.
As shown in fig. 1b, the
The diameter and the coil spacing of the
The spiral resonator also comprises a capacitance fine tuning
As shown in fig. 2, the capacitance fine-tuning pole plate device comprises a capacitance fine-tuning pole plate 10, an adjusting rod 10-1, a graduated scale 10-6, positive and negative limit switches (10-2 and 10-3), an adjusting button 10-4 and an adjusting screw 10-5 which are divided into two parts and arranged inside and outside a spiral resonator; the capacitor fine-tuning polar plate is arranged in the spiral resonator, is parallel to the side wall 3 of the spiral resonator, and is connected with an adjusting frame, a graduated scale 10-6, positive and negative limit switches (10-2 and 10-3), an adjusting button 10-4 and an adjusting screw 10-5 outside the spiral resonator through an adjusting rod 10-1; the adjusting rod 10-1 penetrates through the inside and outside of the side wall of the spiral resonator along the direction vertical to the side wall of the spiral resonator, the part of the adjusting rod extending out of the shielding shell is arranged in the adjusting frame, the left side and the right side of the adjusting rod are respectively provided with a graduated scale 10-6 and an adjusting screw 10-5, the adjusting frame is also provided with positive and negative limit switches (10-2 and 10-3) at certain intervals, the adjusting rod 10-1 in the adjusting frame is provided with an adjusting button 10-4 for driving the adjusting rod to move up and down, one side of the adjusting rod 10-1 opposite to the graduated scale 10-6 is also provided with an adjusting screw 10-5, and the adjusting screw 10-5 is used for fixing the current stroke position of(ii) a The trimming plates cannot be too close to touch the solenoid coil and set to a maximum stroke of
The beam cutting polar plate is divided into an upper
The coupling ring adjusting bracket 12 comprises an adjusting knob 12-1, a threaded telescopic rod 12-2 and a fixing screw 12-3; one end of the threaded telescopic rod 12-2 is fixedly connected with the
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