EP1505855A2 - Driftröhrenbeschleuniger zur Beschleunigung von Ionenpaketen - Google Patents
Driftröhrenbeschleuniger zur Beschleunigung von Ionenpaketen Download PDFInfo
- Publication number
- EP1505855A2 EP1505855A2 EP04015387A EP04015387A EP1505855A2 EP 1505855 A2 EP1505855 A2 EP 1505855A2 EP 04015387 A EP04015387 A EP 04015387A EP 04015387 A EP04015387 A EP 04015387A EP 1505855 A2 EP1505855 A2 EP 1505855A2
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- EP
- European Patent Office
- Prior art keywords
- drift tube
- structured
- steel block
- accelerator according
- drift
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000001133 acceleration Effects 0.000 title description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 88
- 239000010959 steel Substances 0.000 claims abstract description 88
- 239000000498 cooling water Substances 0.000 claims description 19
- 238000010884 ion-beam technique Methods 0.000 claims description 15
- 150000002500 ions Chemical class 0.000 description 15
- 238000010276 construction Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H9/00—Linear accelerators
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/22—Details of linear accelerators, e.g. drift tubes
Definitions
- the invention relates to a Driftröhrenbevanter for Acceleration of ion packets in ion beam accelerators.
- the drift tube accelerator is of the IH type and has a housing of a longitudinally divided three-piece Vacuum tank on. This vacuum tank consists of a middle piece, a lower half shell and an upper half shell.
- the middle piece has on its ion beam leading Longitudinal axis an inlet opening and an outlet opening for the ion packets.
- the centerpiece has on his opposite inner walls longitudinal ribs, which are parallel are aligned to the longitudinal axis. At the longitudinal ribs are arranged alternating drift tube, which in turn Drift tube pieces coaxial with the ion beam leading longitudinal axis hold.
- the center piece with the drift tube holders is removable mounted on the lower half shell and is made by The upper half shell is removably covered.
- IH Driftröhrenbevanter is from the Publication U. Ratzinger, "IH-Structure and its capability to accelerate high current beams", Proceedings of the High IEEE Particle Accelerator Conference (PAC91), San Francisco, 1991 (IEEE Service Center Piscataway, N.J., 1991) Pages 567 to 571, known.
- Such Driftröhrenbevanter from a middle piece and an upper and a lower one Half shell with a semi-cylindrical cross section have the disadvantage that the tank is in the plane of the centerpiece during evacuation due to the radial inward forces acting when evacuating the Tanks due to the pressure difference between the environment and the tank interior caused by up to several millimeters shrinks in diameter when the inner height of the vacuum tank is greater than the inner distance of the inner walls the middle piece, especially if a large length to diameter Ratio in such vacuum tanks for IH Driftröhrenbevanter is present. This causes a Misalignment of the opposite longitudinal ribs of the Middle frame held Driftrohrhaltern and of these held Driftrohr GmbH GmbH against each other and opposite the ion beam leading longitudinal axis of the center piece.
- such IH driftwälenbevanter with up to two integrated quadrupole magnetic triplet lenses for transversely focusing the ion beams equipped with the supports of these quadrupole triplet lenses not be carried by the vacuum tank, but led out of the vacuum tank via diaphragm bellows and be supported in an outer tank base, so that already when evacuating the vacuum tank through it occurring evacuation forces misalignments occur can.
- a support of the introduced Quadrupole triplet lenses on an outer tank base very costly and requires a complex Assembly.
- the object of the invention is a Driftröhrenbevanter to accelerate ion packets with the the problems listed above can be solved and the Overcome disadvantages of known drift tube accelerators and their application areas and boundary parameters are extended become. It is another object of the invention, the investment costs of a drift tube accelerator and increase its profitability.
- the drift tube accelerator described above is characterized in that the lower half-shell has a structured lower steel block which has a partially planar inner bottom, on which preferably focusing devices, vacuum feedthroughs and / or tuning elements can be provided. Furthermore, the invention is characterized in that the upper half-shell has a structured upper steel block which has a partially planar inner covering surface, preferably with openings for vacuum passages, wherein tuning elements can be provided on the flat areas of the covering surface.
- the solution according to the invention has the advantage that it can dispense with a support frame, because the drift tube accelerator according to the invention due to the structured upper and lower solid steel blocks, which replaced the conventional half shells, has inherent stability, which make an outer support frame dispensable and a misalignment of Driftrohr GmbH against each other and safely prevent against the ion beam leading longitudinal axis of the center piece.
- the drift tube accelerator according to the invention has the advantage that the structured lower steel block has a partially planar inner bottom on which additional components influencing the ion beam can advantageously be fixed within the cavity of the vacuum tank, so that misalignments previously carried between those carried by the outer base Components such as triplet lenses and held by the inner walls of the cavity components such as Driftrohr GmbHen can no longer occur because all arranged in the cavity of the vacuum tank additional components, such as focusing and tuning elements can be arranged and supported on flat portions of the inner bottom.
- the vacuum tank has at least 2 inner regions, in which the drift tubes arranged with alternating Drift tube holders are arranged, wherein between the areas each a special drift tube containing a focusing device for transversely focusing the ion beams standing on the partially level inner floor of the lower structured steel block is arranged such that it encloses the longitudinal axis of the middle piece.
- quadrupole magnets are included as singlets or as multiplets are arranged in the special drift tubes.
- This embodiment of the invention has the advantage that proven components of magnetic lenses are used.
- the structured lower steel block or the structured steel upper block or the textured one lower and upper steel block along the focussing devices have a changed cross-section than along the areas where the drift tubes arranged with alternating Drift tube holders are arranged.
- This adaptation of the cross section of the cavity in the region of the focusing devices has the advantage of partial compensation of the Column volume without affecting the electric field distribution detuned along the longitudinal axis of the Driftröhrenbeschreibers becomes.
- the drift tubes are arranged with alternately arranged Driftrohrhalter with increasing in the beam direction center distances. This advantageously takes into account the increasing speed of the ion packets as they pass through the drift tube accelerator.
- the structured lower steel block or the structured upper steel block or the structured lower and the upper steel block have cavities which extend the cross-section of the vacuum tank in certain sections. This has the advantage that the decrease in the capacity of the drift tube structure relative to the length unit can be compensated cost-effectively as much as possible and production costs can be minimized and incorrect adjustments can be made in order to be able to excite the fundamental mode of the cavity.
- the structured lower steel block or the structured steel upper block or the textured lower and upper steel block cavities have the cross section of the vacuum tank in certain sections in stages.
- a Gradual expansion of the Kavticiansqueriteses has the Advantage that they are manufactured in the massive lower and upper steel blocks cost-effectively incorporated can be and at mismatches a cost-effective Post-processing is possible to a very strong decrease the capacity related to the unit of length Drift tube structure cost-effective to compensate, and order to be able to stimulate the basic mode of the cavity.
- the alternately arranged Driftrohrhalter in longitudinal grooves parallel to the longitudinal axis in the longitudinal ribs of the middle piece are performed.
- Such Longitudinal groove increases the precise alignment of the drift tube pieces coaxial to the beam direction and leaves a fine adjustment of the Center distance of the drift tube pieces to the increasing thread the accelerated ion packets by shifting the Drift tube holder in the longitudinal grooves to.
- the longitudinal ribs in the longitudinal direction one Have cooling water channel. This cooling water channel has the Advantage that it directly the longitudinal rib, at which the Drift tube holder are attached, cools and thus heat directly can dissipate from the inner wall of the middle piece.
- the center piece in the End faces further cooling water channels, so that the massive wall of the front side of the center piece also Contribute to active heat dissipation, and thus a thermal Misalignment due to thermal distortion of the components the drift tube accelerator, in particular the inlet opening and the outlet opening at the end faces not occurs.
- the structured lower and upper Steel block cooling water ducts on their outer surfaces are arranged have.
- Such cooling water ducts are inexpensive to produce and also reliable, since they are located outside the cavity and the Outer shape of the steel blocks can be adjusted.
- the structured lower and upper steel block Minimum wall thickness of 10 mm, with inside this wall thickness cooling water channels provided there where they are in terms of strength no weak points cause.
- the present invention allows the acceleration the ions from the injection energy at the inlet of the center piece to the outlet opening of 400 keV / u accelerated to 7 MeV / u.
- the IH Driftröhrenbevanter the present invention a Length of 3.77 m.
- the velocity of the ions grows during their acceleration in the IH drift tube accelerator of the present invention of about 2.9% of the speed of light to about 12.2% of the speed of light. Analogous also takes the step size or the center distance the drift tubes or the Driftrohr publishede along the IH accelerator about by a factor of 4.
- the IH drift tube accelerator in the IH drift tube accelerator according to the invention a compensation of the decrease in the Unit length related capacity of the drift tube structure provided in an embodiment of the invention.
- the decrease in the unit of length becomes related capacity of the drift tube structure by the compensated widening cross-section, which in advantageous Way the basic mode of the cavity are stimulated can.
- the vacuum tank has, in a preferred embodiment
- the invention has four inner regions in which the Driftrohr GmbHe with increasing increment in beam direction are arranged, wherein between the areas three Triplet lenses for focusing the ion beams of area to area standing on the flat sections of the inner floor of the structured lower steel block arranged in such a way are that they enclose the longitudinal axis of the middle piece.
- the use according to the invention of only one Driftröhrenbeschreiberkavtician for four inner acceleration ranges, especially in the case of ion accelerators comparatively high operating frequency of about 217 MHz leads in comparison to conventional equipment to a very long cavity in the Ratio to the inner diameter.
- the inner height of the IH cavity is only 340 mm, while the inner length with 3718 mm a ratio of inner height to inner length of about 1:11 represents. This ratio of internal dimensions would make the RF tuning of the cavity considerably more difficult, when working with conventional building types.
- the invention provides that the structured lower and upper steel block in a preferred Embodiment of the invention have cavities, the Cross-section of the vacuum tank in certain stages in stages expand for the individual areas.
- a high frequency cavity becomes a resonant frequency reached about 217 MHz, which is an estimated goodness of the resonator from 12000 to 15000.
- the cavity itself is pulsed with an HF pulse duration of 0.5 ms and a pulse repetition rate of 10 Hz, what corresponds to a duty cycle of a maximum of about 0.5%.
- the cavity is about 1.0 to 1.1 MW, which in one average thermal power consumption of a maximum of about 5 up to 6 kW results.
- the thereby delivered to the tank thermal Energy is provided by effective water cooling on the one hand the longitudinal ribs in the middle part and on the other hand the outer surfaces of the structured upper and lower Reached steel blocks.
- the vacuum tank consists of three main parts, all three are thus water cooled, namely the middle piece and the lower and upper half shells in the form of structured lower and upper steel blocks.
- the middle piece carries the Drift tube structure with, for example, fifty-two Drift pipe pieces, each with an individual length.
- the Drift pipe pieces are in the four areas mentioned above arranged. These four drift tube areas are going through three integrated quadruple triplet lenses coupled together. In each of the areas becomes another type of drift tube used.
- the individual drift tube types differ in their diameters.
- the drift tubes will be worn by drift tube holders with the drift tubes are soldered.
- the drift tube holders with the soldered drift tubes are not directly water cooled, but they are in one Longitudinal groove of the water-cooled longitudinal rib of the middle part brought in. Thus they are about the heat conduction of the water-cooled Middle frame cooled and are to increase the thermal conductivity made of SE copper.
- the drift tube holder be in the longitudinal ribs of the center frame in a longitudinal groove arranged and fixed.
- the middle frame with the drift tube structure forms a horizontal plane and is part of the middle piece.
- the lower and upper tank half-shell is inventively structured upper and lower steel blocks realized, made of solid steel blocks are made. To cool these two structured Steel blocks can be cooling channels of 270 mm width and 4 mm height on the outsides of the textured steel blocks to be ordered.
- the insides of the steel blocks have flat cutouts on. These plan cutouts have different depths in the different four acceleration ranges, so that the cross-section gradually to the on the unit length adapted capacity of the drift tube structure adapted is. At least that will be a partial compensation of Decrease in the unit of length capacity Drift tube structure along the IH cavity reached.
- each one magnetic Quadruple triplet lens included.
- the lower structured steel block an adapted cross section for partial compensation of the orientation of the triplet lenses required support on the inner floor.
- the invention also solves the problem with its stable construction the not yet reached very strong increase in the Ion velocity by about a factor of 4 within a Cavity, especially since it has not been successful, a comparable large ratio between tank inside to inside diameter to realize. For such a high growth
- the ionic speed are so far in the known Drift tube accelerators always require multiple cavities, one each over the entire length of the cavity have constant cross-sectional area.
- the IH drift tube accelerator according to the invention avoids Significant additional costs with the usual Division into several cavities were connected. About that In addition, the use of only one cavity simplifies the operation of the plant and makes this more reliable, since on the one hand, few parameters are controlled and adjusted and on the other hand the number of items to be used Additional equipment is minimized, indicating the probability of failure the entire system decreased. Also an operating frequency over 200 MHz could be used for IH drift tube accelerators with integrated quadrupole triplet lenses not realized according to the prior art become.
- Fig. 1 shows a schematic perspective view of a Drift tube accelerator 1, according to one embodiment the invention.
- the drift tube accelerator is in one Housing 2, which is designed as a vacuum tank 3, housed.
- This housing 2 has a center piece 4 with a Central frame, wherein the center piece 4 on a lower Half shell 5 of a structured lower massive Steel block 15 is screwed vacuum-tight.
- An upper one Half shell 6 has a textured upper massive Steel block 19 on, which has a partially flat inner covering surface 20, and on the center piece 4 for covering the cavity of Driftröhrenbelixers 1 removable is screwed on.
- the housing 2 Before unscrewing the structured steel upper block 19 on the center piece 4 are the individual drift tube components in the elongated cavity of about 3770 mm accommodated.
- the housing 2 has four acceleration areas 24, 25, 26 and 27. Between the acceleration areas 24, 25, 26 and 27 are focussing devices 17 arranged, these focusing means 17 consist of quadrupole triplet lenses 28, 29 and 30. These Triplet lenses surround the longitudinal axis 7, in which the ion beam packets through the middle piece in the beam direction 23rd shot through and accelerated.
- Fig. 2 shows a partially cut schematic Top view of the center piece 4 of the Driftröhrenbevanters 1, according to FIG. 1.
- Components with the same functions, as in Fig. 1 are identified by the same reference numerals and not discussed separately.
- the middle piece 4 In the uncut portion of the middle piece 4 is the arrangement of the resonance components of the drift tube accelerator to recognize.
- the lengths of the drift tube pieces 14 also take place within the acceleration ranges 24, 25, 26 and 27 too.
- These drift tube pieces 14 are drift tube holders 13 held so that they coaxially the longitudinal axis 7 of the center piece 4 enclose.
- the Drift tube pieces 14 alternate with their drift tube holders 13 on the opposite inner walls 10 of the Middle piece 4 attached.
- the two inner walls 10 of the middle piece in each of the four regions 24, 25, 26 and 27 a longitudinal rib 11 which carries a longitudinal groove, in which the Driftrohrhalter 13 with increasing in the beam direction Center distance a are attached.
- Fig. 3 shows a schematic bottom view of the structured lower steel block 15 of the drift tube accelerator 1, according to FIG. 1, wherein on this flat lower surface of the lower steel block 15 openings 21 with corresponding vacuum flanges 22 are arranged.
- About the three vacuum feedthroughs 34, 35 and 36 in the structured lower Steel block 15 become the triplet lenses shown in FIG 24, 25 and 26 supplied with electricity and cooling water.
- the remaining Vacuum flanges are partly used for measuring technology and partly the supply of the resonator with a high-frequency Alternating current of the order of more than 200 MHz.
- Fig. 4 shows a schematic longitudinal section through the Driftröhrenbevanter 1 of FIG. 1. With this longitudinal section becomes the inlet opening 8 and the outlet opening 9 in the region of the middle piece 4 shown. Furthermore becomes clear that the cross section of the cavity in the four acceleration ranges 24, 25, 26 and 27 in stages is extended to the decrease in the unit of length related To compensate for the capacity of the drift tube structure so that the fundamental mode of the cavity can be excited.
- Fig. 5 shows a schematic plan view of the structured Upper steel block 19 of the drift tube accelerator 1, as shown in FIG. 1.
- Components with the same functions as in the preceding figures are given the same reference numerals marked and not discussed separately.
- This plan view is the advantage of the flatness of the outer contour of the structured upper steel block 19, thereby an attachment of vacuum flanges and vacuum feedthroughs and facilitates the welding of a cooling water channel becomes.
- Fig. 6 shows a schematic cross section of a transition from the structured upper steel block 19 on the Centerpiece 4 of the drift tube accelerator 1 according to FIG. 1.
- This detailed drawing Fig. 6 shows the intensive cooling the longitudinal rib 11 through the cooling water passage 31, over the the heat loss from that arranged in the longitudinal groove 12 Drift tube holders are delivered to the center piece 4 can.
- the longitudinal rib 11 is on the inner wall 10 of the center piece 4 welded to form the cooling water passage 31 and the longitudinal groove 12 is inserted after welding, to compensate for welding stresses and welding distortions.
- a cooling water passage 33 on the outer surface 32 of the structured upper steel block 19 is here only exemplified, in the form of a 4 mm high and 240 mm wide cooling water channel, by welding a outer sheet on the textured upper steel block 19 is reached.
- the cooling effect can be further intensified be by both the middle piece 4 and the textured upper steel block 19 in addition to the material have milled cooling water channels.
- FIG. 7 shows a schematic cross section through the drift tube accelerator 1 according to FIG. 1 in the region of a drift tube holder 13.
- Components having the same functions as in the preceding figures are identified by the same reference numerals and are not discussed separately.
- relatively large pumping nozzles are incorporated into the upper and lower structured steel blocks 19 and 15, respectively, to evacuate the drift tube accelerator cavity to 10 -5 Pascal.
- the Driftrohrhalter 13 are secured in the longitudinal groove 12 of the cooled longitudinal rib 11.
- Fig. 8 shows a schematic cross section through the Driftröhrenbevanter 1 according to FIG. 1 in the region of Focusing device 17.
- the focusing device 17 is on the flat inner bottom 16 of the lower structured Steel block 15, the present invention, the usual half-shell replaced.
- About the vacuum feedthrough 18 is the focusing device 17 of a quadrupole triplet lens with power and cooling water supplied.
- Components with the same functions as in the previous figures are the same Reference number indicated and not discussed separately.
- Fig. 9 shows a schematic perspective view of a Driftröhrenbevanters 1, according to FIG. 1 in the area a focusing device 17.
- the focusing device 17 in the form of a triplet lens is in a water-cooled Housing 37 is arranged.
- the cross-section of the cavity is on adjusted the size of the triplet lens, taking the wall thickness of the center piece 4 is reduced and the footprint of the Inner bottom 16 in the area of the focusing device 17 is increased is.
- FIG. 10 shows a longitudinal section through a focusing device 17 of the drift tube accelerator 1 according to FIG. 1.
- Components having the same functions as in the preceding figures are identified by the same reference numerals and are not discussed separately.
- a subsequent correction of the longitudinal axis 7 is possible by a mechanical post-processing of the tuning plate 38 inserted here, wherein an accuracy of a few micrometers can be achieved.
- This is possible because a flat inner bottom 16 is provided in the lower structured steel block 15 for the positioning and adjustment of the triplet lenses in the present invention.
- FIG. 11 shows a longitudinal section through the center piece 4 in the region of the focusing device 17 of Fig. 10. Components with the same functions as in the preceding figures are identified by the same reference numerals and not discussed separately.
- This longitudinal section shows that the triplet lens without any lateral support on the center piece 4 on the flat inner bottom 16 of the lower structured steel block 15 is arranged such that the axis of the triplet lens is aligned exactly to the beam axis, without lateral support aids to the center piece 4 is required are.
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- Particle Accelerators (AREA)
Abstract
Description
Die erfindungsgemäße Lösung hat den Vorteil, dass auf einen Stützrahmen verzichtet werden kann, weil der erfindungsgemäße Driftröhrenbeschleuniger aufgrundder strukturierten oberen und unteren massiven Stahlblöcke, welche die konventionellen Halbschalen ersetzten, eine Eigenstabilität besitzt, welche einen äußeren Stützrahmen entbehrlich machen und eine Fehljustage der Driftrohrstücke gegeneinander und gegenüber der ionenstrahlführenden Längsachse des Mittelstücks sicher verhindern. Darüber hinaus hat der erfindungsgemäße Driftröhrenbeschleuniger den Vorteil, dass der strukturierte untere Stahlblock einen teilweise ebenen Innenboden aufweist, auf dem zusätzliche den Ionenstrahl beeinflussende Komponenten innerhalb der Kavität des Vakuumtanks vorteilhaft fixiert werden können, so dass Fehljustagen, die bisher zwischen den von dem äußeren Untergestell getragenen Komponenten wie Triplettlinsen und den von den Innenwänden der Kavität gehaltenen Komponenten wie Driftrohrstücken nicht mehr auftreten können, da sämtliche in der Kavität des Vakuumtanks angeordnete Zusatzkomponenten, wie Fokussiereinrichtungen und Abstimmelemente auf ebenen Teilstücken des Innenbodens angeordnet und abgestützt werden können.
Weiterhin ist es vorgesehen, dass der strukturierte untere Stahlblock oder der strukturierte obere Stahlblock oder der strukturierte untere und der obere Stahlblock Kavitäten aufweisen, die den Querschnitt des Vakuumtanks in bestimmten Abschnitten erweitern. Damit ist der Vorteil verbunden, dass die Abnahme der auf die Längeneinheit bezogenen Kapazität der Driftröhrenstruktur weitestgehend und fertigungstechnisch kostengünstig kompensiert werden kann und bei Fehlanpassungen eine kostengünstige Nachbearbeitung möglich ist, um die Grundmode der Kavität anregen zu können.
- Fig. 1
- zeigt eine schematische perspektivische Ansicht eines Driftröhrenbeschleunigers gemäß einer Ausführungsform der Erfindung,
- Fig. 2
- zeigt eine teilweise aufgeschnittene schematische Draufsicht auf das Mittelstück des Driftröhrenbeschleunigers gemäß Fig. 1,
- Fig. 3
- zeigt eine schematische Untersicht auf den strukturierten unteren Stahlblock des Driftröhrenbeschleunigers, gemäß Fig. 1,
- Fig. 4
- zeigt einen schematischen Längsschnitt durch den Driftröhrenbeschleuniger, gemäß Fig. 1,
- Fig. 5
- zeigt eine schematische Draufsicht auf den strukturierten oberen Stahlblock des Driftröhrenbeschleunigers, gemäß Fig. 1,
- Fig. 6
- zeigt einen schematischen Querschnitt eines Übergangs von dem strukturierten oberen Stahlblock auf das Mittelstück des Driftröhrenbeschleunigers, gemäß Fig. 1,
- Fig. 7
- zeigt einen schematischen Querschnitt durch den Driftröhrenbeschleuniger, gemäß Fig. 1 im Bereich eines Driftrohrhalters,
- Fig. 8
- zeigt einen schematischen Querschnitt durch den Driftröhrenbeschleuniger 1, gemäß Fig. 1 im Bereich einer Fokussiereinrichtung,
- Fig. 9
- zeigt eine schematische perspektivische Ansicht eines Driftröhrenbeschleunigers gemäß Fig. 1 im Bereich einer Fokussiereinrichtung,
- Fig. 10
- zeigt einen schematischen Längsschnitt durch eine Fokussiereinrichtung des Driftröhrenbeschleunigers, gemäß Fig. 1,
- Fig. 11
- zeigt einen schematischen Längsschnitt durch das Mittelstück im Bereich der Fokussiereinrichtung der Fig. 10.
Fig. 11 zeigt einen Längsschnitt durch das Mittelstück 4 im Bereich der Fokussiereinrichtung 17 der Fig. 10. Komponenten mit gleichen Funktionen, wie in den vorhergehenden Figuren werden mit gleichen Bezugszeichen gekennzeichnet und nicht extra erörtert. Dieser Längsschnitt zeigt, dass die Triplettlinse ohne jede seitliche Abstützung an dem Mittelstück 4 auf dem ebenen Innenboden 16 des unteren strukturierten Stahlblockes 15 derartig angeordnet ist, dass die Achse der Triplettlinse exakt zu der Strahlachse ausgerichtet ist, ohne dass seitliche Stützhilfen zu dem Mittelstück 4 erforderlich sind.
- 1
- Driftröhrenbeschleuniger
- 2
- Gehäuse
- 3
- Vakuumtank
- 4
- Mittelstück
- 5
- untere Halbschale
- 6
- obere Halbschale
- 7
- Längsachse
- 8
- Eintrittsöffnung
- 9
- Austrittsöffnung
- 10
- Innenwand des Mittelstücks
- 11
- Längsrippe
- 12
- Längsnut
- 13
- Driftrohrhalter
- 14
- Driftrohrstück
- 15
- strukturierter unterer Stahlblock
- 16
- ebener Innenboden
- 17
- Fokussiereinrichtung
- 18
- Vakuumdurchführung
- 19
- strukturierter oberer Stahlblock
- 20
- innere Abdeckfläche
- 21
- Öffnungen in Abdeckfläche
- 22
- Vakuumflansch
- 23
- Strahlrichtung
- 24
- erster innerer Bereich
- 25
- zweiter innerer Bereich
- 26
- dritter innerer Bereich
- 27
- vierter innerer Bereich
- 28
- erste Triplettlinse
- 29
- zweite Triplettlinse
- 30
- dritte Triplettlinse
- 31
- Kühlwasserkanal in Längsrippe
- 32
- Außenflächen der Stahlblöcke
- 33
- Kühlwasserkanal in oberen und unteren Stahlblöcken
- 34
- Vakuumdurchführungen zu den Triplettlinsen
- 35
- Vakuumdurchführungen zu den Triplettlinsen
- 36
- Vakuumdurchführungen zu den Triplettlinsen
- 37
- Gehäuse der Triplettlinse
- 38
- Abstimmplatte
- a
- Mittenabstand zwischen Driftrohrstücken
Claims (13)
- Driftröhrenbeschleuniger zur Beschleunigung von Ionenpaketen in Ionenstrahlbeschleunigungsanlagen, der folgende Merkmale aufweist:ein Gehäuse (2) aus einem längsgeteilten dreiteiligen Vakuumtank (3) mit:einem Mittelstück (4),einer unteren Halbschale (5), undeiner oberen Halbschale (6),
wobei das Mittelstück (4) abnehmbar auf der unteren Halbschale (5) montiert ist, und von der oberen Halbschale (6) abnehmbar abgedeckt ist
dadurch gekennzeichnet, dass
die untere Halbschale (5) einen strukturierten Stahlblock (15) aufweist, der einen teilweise ebenen Innenboden (16) besitzt, auf dem Vakuumdurchführungen (18) angeordnet sind, und
die obere Halbschale (6) ebenfalls einen strukturierten Stahlblock (19) aufweist, der eine teilweise ebene innere Abdeckfläche (20) mit Vakuumdurchführungen (18) aufweist. - Driftröhrenbeschleuniger nach Anspruch 1,
dadurch gekennzeichnet, dass
der Vakuumtank (3) mindestens 2 innere Bereiche (24, 25) aufweist, in denen die Driftrohre (14) mit alternierend angeordneten Driftrohrhaltern (13) angeordnet sind, wobei zwischen den Bereichen jeweils ein spezielles Driftrohr enthaltend eine Fokussiereinrichtung (17) zur transversalen Fokussierung der Ionenstrahlen stehend auf dem teilweise ebenen Innenboden (16) des unteren strukturierten Stahlblockes (15) derart angeordnet ist, daß es die Längsachse (7) des Mittelstücks (4) umschließt. - Driftröhrenbeschleuniger nach Anspruch 2,
dadurch gekennzeichnet, dass
als Fokussiereinrichtungen (17) Quadrupolmagnete enthalten sind, die als Singuletts oder als Multipletts in den speziellen Driftrohren angeordnet sind. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der strukturierte untere Stahlblock (15) oder der strukturierte obere Stahlblock (19) oder der strukturierte untere und obere Stahlblock (15, 19) entlang der Fokussiereinrichtungen (17) einen veränderten Querschnitt aufweisen als entlang der Bereiche, in denen die Driftrohre (14) mit alternierend angeordneten Driftrohrhaltern (13) angeordnet sind. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Driftrohre (14) mit alternierend angeordneten Driftrohrhaltern (13) mit in Strahlrichtung zunehmenden Mittenabständen angeordnet sind. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der strukturierte untere Stahlblock (15) oder der strukturierte obere Stahlblock (19) oder der strukturierte untere und der obere Stahlblock (15, 19) Kavitäten aufweisen, die den Querschnitt des Vakuumtanks (3) in bestimmten Abschnitten erweitern. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der strukturierte untere Stahlblock (15) oder der strukturierte obere Stahlblock (19) oder der strukturierte untere und der obere Stahlblock (15, 19) Kavitäten aufweisen, die den Querschnitt des Vakuumtanks (3) in bestimmten Abschnitten stufenweise erweitern. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
auf dem teilweise ebenen Innenboden (16) des strukturierten unteren Stahlblocks (15) oder auf der teilweise ebenen inneren Abdeckfläche (20) des strukturierten oberen Stahlblocks (19) oder auf dem teilweise ebenen Innenboden (16) des strukturierten unteren Stahlblocks (15) und auf der teilweise ebenen inneren Abdeckfläche (20) des strukturierten oberen Stahlblocks (19) zusätzliche Abstimmelemente (38) angeordnet sind. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die alternierend angeordneten Driftrohrhalter ( (14)) (13) in Längsnuten (12) parallel zur Längsachse (7) in den Längsrippen (11) des Mittelstücks (4) geführt werden. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
die Längsrippen (11) in Längsrichtung einen Kühlwasserkanal (31) aufweisen. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
das Mittelstück (4) in den Stirnseiten weitere Kühlwasserkanäle aufweist. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der strukturierte untere und der obere Stahlblock (15, 19) Kühlwasserführungen (33), die auf ihren Außenflächen (32) angeordnet sind, aufweisen. - Driftröhrenbeschleuniger nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass
der strukturierte untere und der obere Stahlblock (15, 19) Mindestwandstärken von 10 mm aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10333454A DE10333454B4 (de) | 2003-07-22 | 2003-07-22 | Driftröhrenbeschleuniger zur Beschleunigung von Ionenpaketen |
DE10333454 | 2003-07-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1505855A2 true EP1505855A2 (de) | 2005-02-09 |
EP1505855A3 EP1505855A3 (de) | 2009-09-23 |
EP1505855B1 EP1505855B1 (de) | 2017-01-11 |
Family
ID=33547034
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP04015387.6A Expired - Lifetime EP1505855B1 (de) | 2003-07-22 | 2004-06-30 | Driftröhrenbeschleuniger zur Beschleunigung von Ionenpaketen |
Country Status (4)
Country | Link |
---|---|
US (1) | US7081723B2 (de) |
EP (1) | EP1505855B1 (de) |
JP (1) | JP4636468B2 (de) |
DE (1) | DE10333454B4 (de) |
Families Citing this family (8)
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JP4194105B2 (ja) * | 2005-09-26 | 2008-12-10 | 独立行政法人放射線医学総合研究所 | Hモード・ドリフトチューブ線形加速器及びその設計方法 |
JP2010277942A (ja) * | 2009-06-01 | 2010-12-09 | Mitsubishi Electric Corp | Hモード型ドリフトチューブ線形加速器、およびその電場分布調整方法 |
WO2011144222A1 (en) * | 2010-05-18 | 2011-11-24 | Cern-European Organization For Nuclear Research | Mounting mechanism |
CN103026802B (zh) * | 2010-07-12 | 2015-06-24 | 三菱电机株式会社 | 漂移管直线加速器 |
CN102348320A (zh) * | 2011-10-01 | 2012-02-08 | 中国科学院近代物理研究所 | 非圆断面薄壁真空管道及非圆断面薄壁真空室 |
CN109413832B (zh) * | 2018-10-30 | 2020-06-19 | 清华大学 | 采用永磁四极磁铁的交叉指型纵磁模漂移管直线加速器 |
CN112135410A (zh) * | 2020-10-14 | 2020-12-25 | 中山大学 | 一种具有螺旋散热结构的高频谐振腔体 |
CN112822832B (zh) * | 2021-02-02 | 2024-09-06 | 中国原子能科学研究院 | 一种实现连续加速的宽截面变轨道的真空腔体结构 |
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FR2386231A1 (fr) * | 1977-03-31 | 1978-10-27 | Cgr Mev | Structure acceleratrice pour accelerateur lineaire de particules chargees |
FR2390069B1 (de) * | 1977-05-05 | 1981-04-30 | Commissariat Energie Atomique | |
US4350921A (en) * | 1980-03-11 | 1982-09-21 | The United States Of America As Represented By The United States Department Of Energy | Drift tube suspension for high intensity linear accelerators |
FR2527413A1 (fr) * | 1982-05-19 | 1983-11-25 | Commissariat Energie Atomique | Accelerateur lineaire de particules chargees comportant des tubes de glissement |
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-
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- 2004-06-30 EP EP04015387.6A patent/EP1505855B1/de not_active Expired - Lifetime
- 2004-07-12 US US10/889,291 patent/US7081723B2/en not_active Expired - Fee Related
- 2004-07-22 JP JP2004214756A patent/JP4636468B2/ja not_active Expired - Fee Related
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US4404495A (en) * | 1980-01-30 | 1983-09-13 | Gesellschaft Fur Schwerionenforschung Mbh | High frequency resonator |
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Also Published As
Publication number | Publication date |
---|---|
JP2005044808A (ja) | 2005-02-17 |
US20050029970A1 (en) | 2005-02-10 |
EP1505855B1 (de) | 2017-01-11 |
JP4636468B2 (ja) | 2011-02-23 |
EP1505855A3 (de) | 2009-09-23 |
DE10333454A1 (de) | 2005-06-16 |
US7081723B2 (en) | 2006-07-25 |
DE10333454B4 (de) | 2006-07-13 |
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