CN201919234U - Novel electrode plate structure of spiral static deflection plate - Google Patents
Novel electrode plate structure of spiral static deflection plate Download PDFInfo
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- CN201919234U CN201919234U CN2010206961457U CN201020696145U CN201919234U CN 201919234 U CN201919234 U CN 201919234U CN 2010206961457 U CN2010206961457 U CN 2010206961457U CN 201020696145 U CN201020696145 U CN 201020696145U CN 201919234 U CN201919234 U CN 201919234U
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- electrode plate
- negative electrode
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- positive electrode
- spiral
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- 230000003068 static effect Effects 0.000 title claims abstract description 10
- 238000010276 construction Methods 0.000 claims description 8
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims description 3
- 238000010884 ion-beam technique Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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Abstract
The utility model relates to a novel electrode plate structure of a spiral static deflection plate, belonging to the technical field of accelerators. The novel electrode plate structure comprises a spiral positive electrode plate and a spiral negative electrode plate. Voltage is applied between the positive electrode plate and the negative electrode plate to control an incident ion beam to be deflected along a centerline between an upper electrode plate and the negative electrode plate. The novel electrode plate structure is characterized in that along any cross section of the centerline, the internal side of the positive electrode plate is dented and the internal side of the negative electrode plate is raised. The dented internal side of the positive electrode plate and the raised internal side of the negative electrode plate are arc-shaped. The distance between the positive electrode plate and the negative electrode plate is 8mm and the width of each electrode plate is 20mm. By adopting the technical scheme disclosed by the utility model, the novel electrode plate structure of the spiral static deflection plate has the advantages that the increase of the horizontal envelope of the beam caused by a space charge effect can be effectively suppressed, beam losses are reduced and transmission efficiency is improved.
Description
Technical field
The utility model belongs to the accelerator art field, is specifically related to a kind of new construction of battery lead plate of static spiral deflector.
Background technology
J.L.Belmont had proposed adopting the spirality electrostatic deflection plates the vertical charged ion beam steering of injecting 90 degree to be transported to the center of cyclotron with J.L.Pabot in 1966.The 1970's L.Root has studied optical characteristics no inclination angle and that the spiral deflector at certain inclination angle is arranged, as depicted in figs. 1 and 2.Ion beam passes in the middle of two-plate, and the last bottom crown of the deflector of two kinds of structures is along the inboard straight line for being parallel to each other of any cross section of beam direction.Ion screw in the three-dimensional magnetostatic field that three-dimensional electrostatic field that electrostatic deflection plates provides and cyclotron main magnet provide, the direction of motion is vertical with direction of an electric field, so ion energy is constant.
For low energy, intense pulsed ion beam, the space charge field of line self is more intense, and line is played the lateral divergence effect.Beam intensity is high more, and disperse function is strong more.Studies show that in the static spiral deflector of routine, two pole plates are parallel lines, as shown in Figure 3, perpendicular to pole plate direction (u direction), because the mirror charge effect on the electrode wall is inhibited to space-charge force, the line envelope can obviously not increase on this direction; And be parallel to pole plate direction (h direction), and because electrostatic deflection plates can not provide focusing force, the lateral divergence of intense pulsed ion beam can not get suppressing, the line envelope is increasing, thereby causes beam loss.
The utility model content
(1) utility model purpose
For solving above-mentioned problems of the prior art, the purpose of this utility model provides a kind of new construction of battery lead plate of static spiral deflector.
(2) technical scheme
For achieving the above object, the technical solution of the utility model realizes as follows:
A kind of new construction of battery lead plate of static spiral deflector, comprise spiral helicine positive electrode plate and negative electrode plate, center line deflection on making alive control incident ion line edge between positive electrode plate and the negative electrode plate, between the negative electrode plate, it is characterized in that: along on arbitrary cross section of described center line, the inboard of described positive electrode plate is recessed, protrude the inboard of negative electrode plate.The inboard of described positive electroplax is recessed, the inboard of negative electrode plate is protruded and is circular shape.Distance between described positive electrode plate and negative electrode plate pole plate is 8mm, and plate width is 20mm.
(3) beneficial effect
The technical scheme that the utility model provides can suppress effectively because the growth of the horizontal envelope of line that space charge effect causes reduces beam loss, improves efficiency of transmission.
Description of drawings
Fig. 1 is the spiral deflector structure diagram at no inclination angle;
Fig. 2 is the spiral deflector structure diagram that certain inclination angle is arranged;
Fig. 3 is along the schematic diagram of the arbitrary cross section of beam direction among Fig. 1 or Fig. 2;
Fig. 4 is along the schematic diagram of the arbitrary cross section of beam direction among Fig. 1 or Fig. 2.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described further.
A kind of new construction of battery lead plate of static spiral deflector, comprise spiral helicine positive electrode plate 2 and negative electrode plate 1, control the incident ion line along the center line deflection between the positive and negative electrode plate at making alive between positive electrode plate 2 and the negative electrode plate 1, it is characterized in that: along on arbitrary cross section of described center line, the inboard of described positive electrode plate 2 is recessed, protrude the inboard of negative electrode plate 1.The inboard of described positive electrode plate 2 is recessed, the inboard of negative electrode plate 1 is protruded and is circular shape.
After applying voltage on the pole plate, the electric field component of h direction can be provided, thereby provide the focusing force of h direction non-central particle, can offset or the repulsive force of the space charge of partial offset low energy intense pulsed ion beam, thereby suppress the growth of the horizontal envelope of line.The curvature that the inboard of described positive electrode plate 2 is recessed, protrude the inboard of negative electrode plate 1 is determined optimal value according to calculating.
The technical scheme that the utility model provides can be used for medically carrying out the low energy compact cyclotron of boron neutron capture therapy.As shown in Figure 5, the injection energy of the direct current negative hydrogen ion bundle that injects in the experiment is 25keV, and stream is 15mA by force, and the deflector electrode voltage is ± 6.36kV, the electric deflection radius is 30mm, between pole plate apart from 8mm, plate width 20mm adopts the battery lead plate of this structure, in assurance deflected ion beam 90 is spent under the condition of the center that is transported to cyclotron, suppress because the growth of the horizontal envelope of line that space charge effect causes, thereby reach the reduction beam loss, improve the purpose of efficiency of transmission.
Above content be in conjunction with preferred embodiment to specifying that the utility model is done, can not assert that embodiment of the present utility model only limits to these explanations.Concerning the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deductions and conversion, all should be considered as belonging to protection range of the present utility model.
Claims (3)
1. the new construction of the battery lead plate of a static spiral deflector, comprise spiral helicine positive electrode plate (2) and negative electrode plate (1), at making alive control incident ion line between positive electrode plate (2) and the negative electrode plate (1) along the center line deflection between last, the negative electrode plate, it is characterized in that: along on arbitrary cross section of described center line, the inboard of described positive electrode plate (2) is recessed, protrude the inboard of negative electrode plate (1).
2. the new construction of battery lead plate according to claim 1 is characterized in that: the inboard of described positive electrode plate (2) is recessed, the inboard of negative electrode plate (1) is protruded and is circular shape.
3. the new construction of battery lead plate according to claim 1, it is characterized in that: the distance between described positive electrode plate (2) and negative electrode plate (1) pole plate is 8mm, and plate width is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206961457U CN201919234U (en) | 2010-12-23 | 2010-12-23 | Novel electrode plate structure of spiral static deflection plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206961457U CN201919234U (en) | 2010-12-23 | 2010-12-23 | Novel electrode plate structure of spiral static deflection plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201919234U true CN201919234U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206961457U Expired - Lifetime CN201919234U (en) | 2010-12-23 | 2010-12-23 | Novel electrode plate structure of spiral static deflection plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201919234U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979694A (en) * | 2016-04-26 | 2016-09-28 | 东莞中子科学中心 | Pre-cut beam splitter used for beam pulse control |
| CN106132068A (en) * | 2016-07-29 | 2016-11-16 | 中国原子能科学研究院 | A kind of cyclotron injects line deflecting plates and center device |
-
2010
- 2010-12-23 CN CN2010206961457U patent/CN201919234U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105979694A (en) * | 2016-04-26 | 2016-09-28 | 东莞中子科学中心 | Pre-cut beam splitter used for beam pulse control |
| CN105979694B (en) * | 2016-04-26 | 2018-10-26 | 东莞中子科学中心 | A kind of pre-cut beam device for beam burst control |
| CN106132068A (en) * | 2016-07-29 | 2016-11-16 | 中国原子能科学研究院 | A kind of cyclotron injects line deflecting plates and center device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |
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| CX01 | Expiry of patent term |