CN205883694U - Electrostatic deflection plate that can be high pressure resistant among superconductive proton cyclotron of compact - Google Patents
Electrostatic deflection plate that can be high pressure resistant among superconductive proton cyclotron of compact Download PDFInfo
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- CN205883694U CN205883694U CN201620816046.5U CN201620816046U CN205883694U CN 205883694 U CN205883694 U CN 205883694U CN 201620816046 U CN201620816046 U CN 201620816046U CN 205883694 U CN205883694 U CN 205883694U
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- high voltage
- plate
- earth plate
- electrostatic deflection
- compact
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Abstract
The utility model relates to an electrostatic deflection plate that can be high pressure resistant among superconductive proton cyclotron of compact, include the space that becomes by last ground plate, lower ground plate, back ground plate and cutting board draw -around be equipped with high voltage electrode in the space, high voltage electrode passes through the insulated column to be fixed on the ground plate of back, and the length of insulated column should guarantee that creepage distance is not less than 25mm, thick, middle thin structure about the cutting board is. The utility model discloses optimize electrostatic deflection plate high voltage electrode's among the superconductive proton cyclotron structure size and the distance between high voltage electrode surface and the grounded metal plate, can reduce high voltage electrode surface electric field, weakened and send the electron emission, helped improving the seal pressure of board of deflecting, reduce the plate electrode surface treatment's that deflects the degree of difficulty simultaneously, reduce manufacturing cost.
Description
Technical field
This utility model belongs to the electrostatic high-pressure technology being applied in superconduction bevatron, is specifically related to a kind of tight
Gathering can high voltage bearing electrostatic deflection plates in type superconduction bevatron.
Background technology
Superconduction bevatron has in fields such as nuclear medicine, space flight military project and nuclear physics basic research widely should
With.Electrostatic deflection plates is line outbound course conventional in cyclotron.Electrostatic deflection plates by cutting plate, negative high-voltage electrode,
Grounded metal enclosure and insulated column composition, cutting plate ground connection, electrode is by external power source feed-in high pressure.Electrostatic deflection plates exists
Two kinds of discharge breakdown mechanism: vacuum breakdown and insulation breakdown.For the former, mainly high-field electrode surface field emitted electron draws
Rise.Electronics is beaten on metal shell from electrode surface transmitting, metal release gaseous contamination vacuum environment, easily produces sparking now
As；On the other hand, metal local temperature is too high it may happen that fusing, is dropped on high-field electrode and causes electrode surface generation recessed
Fall into, thus the electrostatic deflection plates producing unrepairable is damaged.In compact superconducting cyclotron, magnetic pole gap is the least, the most not
More than 60mm, electrostatic deflection plates is placed in the gap of peak district magnetic pole, causes high-field electrode non-with the distance of ground metal surface
Chang Jin, and the deflecting plates voltage required is the highest, and spark phenomenon easily occurs.For insulation breakdown, it is ensured that insulated column
Creep age distance, and keep the vacuum of deflecting plates local environment.
Utility model content
The purpose of this utility model is easily to occur for electrostatic deflection plates in compact superconduction bevatron to beat
The problem that fire punctures, it is provided that one can high voltage bearing electrostatic deflection plate structure.
The technical solution of the utility model is as follows: can high voltage bearing electrostatic in a kind of compact superconduction bevatron
Deflecting plates, including the space crowded around with cutting plate by upper earth plate, lower earth plate, rear earth plate, is provided with in described space
High-field electrode, described high-field electrode is fixed on rear earth plate by insulated column, and wherein, described insulated column is screw-like knot
Structure, the airspace between screw thread is 2-5mm, and the length of insulated column should ensure that creep age distance is not less than 25mm.
Further, in compact superconduction bevatron as above can high voltage bearing electrostatic deflection plates, wherein,
Described cutting plate is in the thickest, the structure of intermediate thin, and the two ends up and down of cutting plate insert earth plate and lower earth plate respectively
Chute realize fixing.
Further, the thickness of described cutting plate mid portion is 0.1-0.3mm；The thickness of top and the bottom is 1-2mm.
Further, in compact superconduction bevatron as above can high voltage bearing electrostatic deflection plates, wherein,
Described upper earth plate, the inner side of lower earth plate are respectively equipped with groove, are used for increasing the upper and lower two ends of high-field electrode and upper earth plate
And the distance between lower earth plate.
Further, the degree of depth of described groove is 1-3mm.
Further, in compact superconduction bevatron as above can high voltage bearing electrostatic deflection plates, wherein,
It is run-track shaped that described high-field electrode is perpendicular to the cross section of the line direction of motion, a length of 8-10mm of the straightway in cross section, ring
Shape chamfer radius is 6-7mm.
The beneficial effects of the utility model are as follows: this utility model optimizes electrostatic deflection in superconduction bevatron
Distance between physical dimension and high-field electrode surface and the grounding plate of plate high-field electrode, can reduce high-field electrode table
Face electric field, weakens Field Electron Emission, is favorably improved the voltage endurance capability of deflecting plates；Reduce deflecting plates treatment of electrode surfaces simultaneously
Difficulty, reduce manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of this utility model electrostatic deflection plates；
Fig. 2 is the view in transverse section of this utility model electrostatic deflection plates；
Fig. 3 is the surface electric field distribution figure that the high-field electrode of different size structure is corresponding.
Detailed description of the invention
With embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, electrostatic deflection plates provided by the utility model is mainly by high-field electrode 1, cutting plate 2, upper ground connection
Plate 3, rear earth plate 4, lower earth plate 7 and insulated column 5 form.Outside in order to avoid high-field electrode 1 and earth plate, cutting plate and metal
Strike sparks between shell, on the one hand require that high-field electrode surface keeps certain distance with grounded metal, also require that high-tension electricity simultaneously
The height h of polar plane part is greater than the axial largest enveloping of line, provides impartial deflection voltage for major part line.
It is respectively adopted nut between upper earth plate 3, upper earth plate 7 with rear earth plate 4 to be connected；Insulated column 5 uses glass to make pottery
Ceramic material, two ends welding metal, one end uses nut to be fixed on rear earth plate 4, and the other end fixes high-field electrode 1, to high pressure
Electrode 1 is played a supporting role.
As in figure 2 it is shown, insulated column 5 makes screw-like increases its creep age distance, the airspace d between screw thread is 2-5mm；
Cutting plate 2 makes the structure of upper and lower thickness, intermediate thin, is slipped in deflecting plates by the chute of upper and lower earth plate.
The length of insulated column 5 should be ensured that creep age distance is not less than in 25mm；Cutting plate mid portion thickness w1 is 0.1-
0.3mm, reduces the beam loss on cutting plate to the full extent, and top and the bottom thickness w2, up to 1-2mm, improves overall mechanicalness
Energy.
High-field electrode about 1 two ends are the places being easiest to occur sparking, connect with upper and lower to increase high-field electrode two ends
The distance on floor, recessing 6 in upper and lower earth plate, degree of depth s of groove is 1-3mm, such that it is able to increase high-field electrode two ends
And the distance of 1-3mm between upper and lower earth plate.
As in figure 2 it is shown, it is run-track shaped that high-field electrode is perpendicular to the cross section of the line direction of motion, length h of straightway is
8-10mm, annular chamfer radius r are 6-7mm, have both ensured that all beam acceleration voltage ratios were more uniform, and also ensure that electrode surface
Sparking voltage is less.
Above-mentioned electrostatic deflection plates places the superconduction bevatron Magnet being applicable to compact conformation, and magnetic pole gap is general
For 50mm-60mm, required voltage ratio is more critical, higher than 50kV, but still within 80kV.
The cutting plate of electrostatic deflection plates and several pieces of metal ground plates constitute the profile grounding frame of electrostatic deflection plates, high-tension electricity
Pole supports by insulated column is fixing, and its shape determines the Electric Field Distribution in deflecting plates, line from cutting plate and high pole electrode it
Between pass.
Embodiment
In certain superconduction bevatron, extraction proton energy is 240MeV, two electrostatic deflection plates draw, first
Distance between the cutting plate of individual deflecting plates and high-field electrode is 6mm, it is desirable to deflecting electric field intensity be 100kV/cm, corresponding requirement
Voltage be 60kV.Accelerator magnetic pole gap is 50mm, and the axial space leaving deflecting plates for is very limited, uses this utility model
In deflecting plates structure design, as in figure 2 it is shown, the height H of electrostatic deflection plates takes 50mm, be just installed in magnetic pole gap, and
Taking high-field electrode length of straigh line h is 10mm, and chamfer radius r is 7mm, and depth of groove s takes 3mm, make electrode and upper and lower plates away from
From reaching 9mm, avoid sparking as far as possible.Insulated column uses thread-like structure, and the space interval d between screw thread is 3mm, threaded post
Air line distance is 20mm, and this kind of structure makes creep age distance increase to 28mm.Fig. 3 gives under different deflecting plates electrode structures
Electric Field Distribution in electrode arc-shaped surface, the voltage endurance capability of the deflecting plates electrode size used in this utility model is than other
Planform improves 10%-20%, and it is the most crucial that this realizes higher ejection efficiency in compact superconducting cyclotron.
Obviously, those skilled in the art can carry out various change and modification without deviating from this practicality to this utility model
Novel spirit and scope.So, if these amendments of the present utility model and modification are belonged to this utility model claim
And within the scope of equivalent technology, then this utility model is also intended to comprise these change and modification.
Claims (6)
1. in compact superconduction bevatron can a high voltage bearing electrostatic deflection plates, including by upper earth plate (3), under
The space that earth plate (7), rear earth plate (4) are crowded around with cutting plate (2), is provided with high-field electrode (1) in described space, described
High-field electrode (1) is fixed on rear earth plate (4) by insulated column (5), it is characterised in that: described insulated column (5) is in screw thread
Shape structure, the airspace between screw thread is 2-5mm, and the length of insulated column (5) should ensure that creep age distance is not less than 25mm.
2. in compact superconduction bevatron as claimed in claim 1 can high voltage bearing electrostatic deflection plates, its feature
It is: described cutting plate (2) is in the thickest, the structure of intermediate thin, and earth plate is inserted at the two ends up and down of cutting plate (2) respectively
And the chute of lower earth plate (7) realizes fixing (3).
3. in compact superconduction bevatron as claimed in claim 2 can high voltage bearing electrostatic deflection plates, its feature
It is: the thickness of described cutting plate (2) mid portion is 0.1-0.3mm；The thickness of top and the bottom is 1-2mm, ensures machinery
On stability.
4. in the compact superconduction bevatron as described in any one in claim 1-3 can high voltage bearing electrostatic inclined
Flap, it is characterised in that: described upper earth plate, the inner side of lower earth plate are respectively equipped with groove (6), are used for increasing high-field electrode
Distance between two ends and upper earth plate and lower earth plate up and down.
5. in compact superconduction bevatron as claimed in claim 4 can high voltage bearing electrostatic deflection plates, its feature
It is: the degree of depth of described groove (6) is 1-3mm.
6. in the compact superconduction bevatron as described in any one in claim 1-3 can high voltage bearing electrostatic inclined
Flap, it is characterised in that: it is run-track shaped that described high-field electrode is perpendicular to the cross section of the line direction of motion, the straightway in cross section
A length of 8-10mm, annular chamfer radius is 6-7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620816046.5U CN205883694U (en) | 2016-07-29 | 2016-07-29 | Electrostatic deflection plate that can be high pressure resistant among superconductive proton cyclotron of compact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620816046.5U CN205883694U (en) | 2016-07-29 | 2016-07-29 | Electrostatic deflection plate that can be high pressure resistant among superconductive proton cyclotron of compact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205883694U true CN205883694U (en) | 2017-01-11 |
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ID=57700433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620816046.5U Withdrawn - After Issue CN205883694U (en) | 2016-07-29 | 2016-07-29 | Electrostatic deflection plate that can be high pressure resistant among superconductive proton cyclotron of compact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205883694U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102301A (en) * | 2016-07-29 | 2016-11-09 | 中国原子能科学研究院 | Can high voltage bearing electrostatic deflection plates in compact superconduction bevatron |
-
2016
- 2016-07-29 CN CN201620816046.5U patent/CN205883694U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102301A (en) * | 2016-07-29 | 2016-11-09 | 中国原子能科学研究院 | Can high voltage bearing electrostatic deflection plates in compact superconduction bevatron |
| CN106102301B (en) * | 2016-07-29 | 2019-01-29 | 中国原子能科学研究院 | It can high voltage bearing electrostatic deflection plates in compact superconduction bevatron |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170111 Effective date of abandoning: 20190129 |