EP1400158B1 - Hom damped high-frequency resonator - Google Patents
Hom damped high-frequency resonator Download PDFInfo
- Publication number
- EP1400158B1 EP1400158B1 EP02750795A EP02750795A EP1400158B1 EP 1400158 B1 EP1400158 B1 EP 1400158B1 EP 02750795 A EP02750795 A EP 02750795A EP 02750795 A EP02750795 A EP 02750795A EP 1400158 B1 EP1400158 B1 EP 1400158B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguides
- resonator
- hom
- ridges
- resonator cavity
- 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.)
- Expired - Lifetime
Links
Images
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
- H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
- H05H7/14—Vacuum chambers
- H05H7/18—Cavities; Resonators
Definitions
- the Muttibunch vibrations are excited by the interaction of the electron packets with the higher order modes (HOM) of the acceleration resonator.
- HOM higher order modes
- the installation length in the axial direction is about 2 m.
- the broadband rectangular waveguides have a transition to a 7/8 "EIA coaxial line to extract the HOM energy, and not least because of the large diameter of the beam tube openings, relatively small values for the HOM impedances can be achieved reduced shunt impedance for the basic mode, resulting in higher operating costs.
- Both of these resonators are for use in electron-positron storage rings for high energy physics with longer straight sections been developed and therefore suitable for use in synchrotron radiation sources only conditionally.
- the adjustment of the angle of the webs of the waveguide with respect to the axis of the cylindrical resonator cavity by means of rotationally symmetrical flanges allows optimization of the coupling of particularly disturbing HOM's.
- Fig. 1 is schematically shown an inventive HOM attenuated RF resonator.
- a normal conducting 500 MHz acceleration cavity for synchrotron sources in a cylindrical resonator cavity 1 three circular ridge waveguides 2.1; 2.2; 2.3 by means of the flanges F1; F2; F3 arranged.
- the flanges F1; F2; F3 allow the adjustment of the orientation of the webs of the waveguide 2.1; 2.2; 2.3.
- Also shown in this figure is the opening for an RF injection element 4, the opening for the tuner 3 and the opening for connection to a measuring loop 5.
- Fig. 1 shown schematically side view Fig. 1 is clearly visible the offset of the three arranged on the lateral surface of the resonator cavity 1 in the direction of its longitudinal axis waveguide 2.1; 2.2; 2.3 to each other. Also shown in this figure are the impedance transformers 6.1; 6.2; 6.3. The shown inventive offset of the waveguide 2.1; 2.2; 2.3 to each other causes both the symmetrical with respect to the center plane and antisymmetric modes are coupled out efficiently. Shown is also the jet pipe SR, in which the resonator cavity 1 is fitted.
- the Fig. 3 is a schematic spatial sectional drawing of the in Fig. 1 HOM attenuated RF resonator shown.
- each of the two webs S1.1 and S2.1; S1.2 and S2.2; S1.3 and S2.3 of the three waveguides 2.1; 2.2; 2.3 according to the invention protrude into the resonator cavity 1 , that is, the length of the webs S1.1; S2.1; S1.2; S2.2; S1.3; S2.3 is greater than the length of the wall of the waveguide 2.1; 2.2; 2.3.
- flanges F1; F2; F3 are the circular waveguides 2.1; 2.2; 2.3 in its orientation with respect to the beam axis adjustable connected to the resonator cavity 1 , whereby a memory ring specific optimization of the coupling of particularly disturbing HOM's is possible.
- the opening R of the jet pipe SR in the resonator cavity 1 has a "nose cone" geometry, whereby - as already described - a concentration of the accelerating field is realized on the resonator axis.
- Each waveguide 2.1; 2.2; 2.3 is - as in FIG. 3 shown - also depending on an impedance transformer 6.1; 6.2; 6.3 assigned. These impedance transformers 6.1; 6.2; 6.3 each have a section 7.1; 7.2; 7.3 , which is designed as a tapered coaxial line.
- the special design of the waveguide 2.1; 2.2; 2.3 with their penetrating into the resonator 1 each symmetrically arranged two webs S1.1 and S2.1; S1.2 and S2.2; S1.3 and S2.3 are particularly easy to recognize in this sectional drawing.
- FIG. 4 is one of the three circular waveguides 2 with two symmetrically arranged webs S1; S2 shown in longitudinal section.
- the cut-off frequency along the waveguide 2.1; 2.2; 2.3 constant and thereby - as already mentioned - the reflection factor of the tapered waveguide section in the frequency range 650 MHz to 3 GHz minimized.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Particle Accelerators (AREA)
Abstract
Description
Die Erfindung betrifft einen HOM-gedämpften Hochfrequenz-Resonator, aufweisend einen zylinderförmigen Resonatorhohlraum, auf dessen Mantelfläche drei zirkulare getaperte Wellenleiter mit zwei symmetrisch angeordneten Stegen angeordnet sind, wobei die cut-off-Frequenz des Wellenleitergrundmodes über die Länge der Wellenleiter durch Variation der Steghöhe konstant gehalten ist, und die Stegwellenleiter an ihrem Ende mit dem kleineren Durchmesser einen lmpedanztransformator zur breitbandigen HF-Anpassung der Koaxialleitung aufweisen.The invention relates to a HOM-attenuated high-frequency resonator, comprising a cylindrical resonator cavity, on the lateral surface of which three circular tapered waveguides are arranged with two symmetrically arranged webs, wherein the cut-off frequency of the waveguide fundamental over the length of the waveguide by varying the web height constant is held, and the ridge waveguide at its end with the smaller diameter have a impedance transformer for broadband RF matching of the coaxial line.
In Elektronen-Speicherringen zur Erzeugung von Synchrotronstrahlung hängt wie Brillanz der Photonenstrahlen empfindlich von der Qualität des gespeicherten Elektronenstrahls ab. Insbesondere Strahlinstabilitäten haben einen negativen Einfluss auf die erzeugte Brillanz. Die Strahlinstabilitäten werden durch Multibunch-Schwingungen hervorgerufen, die eine Vergrößerung der Energiebreite (longitudinale Schwingungen) und der transversalen Emittanz (transversale Schwingungen) nach sich ziehen.In electron storage rings for generating synchrotron radiation, the brilliance of the photon beams depends sensitively on the quality of the stored electron beam. In particular, beam instabilities have a negative influence on the generated brilliance. The beam instabilities are caused by multibunch oscillations, which entail an increase of the energy width (longitudinal vibrations) and the transversal emittance (transverse vibrations).
Die Muttibunch-Schwingungen werden durch die Wechselwirkung der Elektronenpakete mit den Moden höherer Ordnung (HOM) des Beschleunigungsresonators angeregt. Durch Verringerung der Impedanzen dieser HOM's unterhalb der für jede Synchrotron-Quelle spezifischen kritischen Impedanz können die o.g. Instabilitäten unterdrückt werden.The Muttibunch vibrations are excited by the interaction of the electron packets with the higher order modes (HOM) of the acceleration resonator. By reducing the impedances of these HOMs below the critical impedance specific to each synchrotron source, the o.g. Instabilities are suppressed.
Für die Unterdrückung der Instabilitäten sind dem Stand der Technik nach verschiedene Lösungen für Resonatoren bekannt.For the suppression of instabilities, various solutions for resonators are known in the prior art.
So ist beispielsweise in
Eine andere Lösung, radial angeordnete Wellenleiter an die störenden HOM's anzukoppeln, ist für das Cavity (Hohlraumresonator) am Stanford Linear Accelerator Center, SLAC, in Stanford/USA entwickelt worden (beispielsweise beschrieben in SLAC-PUB-6129, LBL-30624, BECON-91, April 1991). Diese Anordnung besteht aus einem Resonatorhohlraum mit sphärischer radialer Kontur und drei rechteckigen Wellenteitern zur HOM-Dämpfung, die unter einem Winkel von ca. 30 Grad zur Strahlachse am Resonator angeordnet, dann aber parallel zur Achse orientiert und schließlich aus Platzgründen um 180 Grad gebogen sind. Die HOM-Energie wird in Ferritabsorbem im Innenraum der Wellenleiter absorbiert. Bedingt durch die Geometrie der Anordnung beträgt die Einbaulänge in axialer Richtung etwa 1,8 m.Another solution for coupling radially arranged waveguides to the interfering HOMs has been developed for the cavity resonator at the Stanford Linear Accelerator Center, SLAC, Stanford, USA (described, for example, in SLAC-PUB-6129, LBL-30624, BECON). 91, April 1991). This arrangement consists of a resonator cavity with a spherical radial contour and three rectangular wave conductors for HOM attenuation, which are arranged at an angle of approximately 30 degrees to the beam axis on the resonator, but then oriented parallel to the axis and finally bent for space reasons by 180 degrees. The HOM energy is absorbed in ferrite absorbers in the interior of the waveguides. Due to the geometry of the arrangement, the installation length in the axial direction is about 1.8 m.
Beide genannten Resonatoren sind für den Einsatz in Elektron-Positron-Speicherringen für die Hochenergiephysik mit längeren geraden Sektionen entwickelt worden und daher für die Verwendung in SynchrotronStrahlungsquellen nur bedingt geeignet.Both of these resonators are for use in electron-positron storage rings for high energy physics with longer straight sections been developed and therefore suitable for use in synchrotron radiation sources only conditionally.
In
Deshalb ist es Aufgabe der Erfindung, einen kostengünstig herstellbaren HOM-gedämpften HF-Resonator mit verbesserter Dämpfungscharakteristik bei gleichzeitig hoher Shuntimpedanz für den Fundamentalmode in Platz sparender Bauweise anzugeben.It is therefore an object of the invention to provide a low-cost manufacturable HOM attenuated RF resonator with improved damping characteristic at the same time high shunt impedance for the fundamental mode in a space-saving design.
Diese Aufgabe wird durch einen HOM-gedämpften Hochfrequenz-Resonator der eingangs genannten Art dadurch gelöst, dass erfindungsgemäß die Wellenleiter mit zwei symmetrisch angeordneten Stegen zur Einstellung einer Asymmetrie relativ zur Mittelebene des zylinderförmigen Resonatorhohlraumes in Richtung seiner Längsachse versetzt auf der Mantelfläche des Resonatorhohlraums angeordnet sind, die Wellenleiter mit zwei symmetrisch angeordneten Stegen in ihrem Winkel zur Achse des zylinderförmigen Resonatorhohlraums einstellbar ausgebildet sind und die Stege der Wellenleiter in den zylinderförmigen Resonatorhohlraum derart hineinragen, dass die Moden höherer Ordnung optimal angekoppelt sind.This object is achieved by a HOM attenuated high-frequency resonator of the type mentioned above in that according to the invention the waveguide with two symmetrically arranged webs for adjusting an asymmetry relative to the center plane of the cylindrical resonator cavity in the direction of its longitudinal axis offset on the The outer surface of the resonator cavity are arranged, the waveguide with two symmetrically arranged webs are formed adjustable in their angle to the axis of the cylindrical resonator cavity and the webs of the waveguide protrude into the cylindrical resonator cavity such that the modes of higher order are optimally coupled.
Für die effiziente Reduzierung der HOM-Impedanzen ist eine möglichst breitbandige und reflexionsarme Anpassung der kreisförmigen Wellenleiter bei möglichst großer Kopplung von ausschlaggebender Bedeutung. Diese Wirkungen werden gerade durch die erfindungsgerriäße Lösung realisiert.For the efficient reduction of the HOM impedances, the widest possible and low-reflection adaptation of the circular waveguides with the greatest possible coupling is of crucial importance. These effects are being realized by the erfindungsgerriäße solution.
Um sicherzustellen, dass sowohl die bezüglich der Mittelebene symmetrischen Moden als auch die antisymmetrischen Moden effizient ausgekoppelt werden, sind die zirkularen Wellenleiter relativ zur Mittelebene des zylinderförmigen Resonatorhohlraums in Richtung seiner Längsachse versetzt.To ensure that both the mid-plane symmetric modes and the antisymmetric modes are efficiently coupled, the circular waveguides are offset relative to the center plane of the cylindrical resonator cavity in the direction of its longitudinal axis.
Da die Wellenleiter in ihrem Winkel zur Achse des zylinderförmigen Resonatorhohiraumes einstellbar ausgebildet sind, beispielsweise mittels rotationssymmetrischer UHV-Flansche mit dem Resonatorhohlraum verbunden sind, ist die Orientierung des Wellenleitersteges relativ zur Strahlachse wählbar. Dadurch ist es möglich, die Ankopplung an einzelne in einem spezifischen Speicherring besonders störende HOM's selektiv zu optimieren.Since the waveguides are designed to be adjustable in their angle to the axis of the cylindrical resonator cavity, for example by means of rotationally symmetrical UHV flanges are connected to the resonator cavity, the orientation of the waveguide web is selected relative to the beam axis. This makes it possible to selectively optimize the coupling to individual in a specific storage ring particularly disturbing HOM's.
Da die Wellenleiter mit ihren Stegen in den Resonatorhohlraum tiefer hineinragen als vom Verbindungselement, beispielsweise den erwähnten Flanschen, vorgegeben, wird durch die erfindungsgemäße Lösung gewährleistet, dass nicht am selben Ort die Vakuumübergänge und die HF-Übergänge realisiert sind. Die Teillänge der in den Resonatorhohlraum hineinragenden Stege der Wellenleiter wird (neben anderen geometrischen Parametern) durch numerische Simulation derart variiert, dass die HOM-Impedanzen oberhalb der cut-off-Frequenz (650 MHz) bis 3 GHz minimiert werden.Since the waveguides with their webs protrude deeper into the resonator cavity than the connecting element, for example the mentioned flanges, given, the solution according to the invention ensures that the vacuum transitions and the RF transitions are not realized at the same location. The partial length of the webs of the waveguides projecting into the resonator cavity is varied (in addition to other geometrical parameters) by numerical simulation such that the HOM impedances be minimized above the cut-off frequency (650 MHz) to 3 GHz.
Insbesondere die Einstellung der Winkel der Stege der Wellenleiter bezüglich der Achse des zylinderförmigen Resonatorhohlraums mittels rotationssymmetrischer Flansche ermöglicht eine Optimierung der Ankopplung besonders störender HOM's.In particular, the adjustment of the angle of the webs of the waveguide with respect to the axis of the cylindrical resonator cavity by means of rotationally symmetrical flanges allows optimization of the coupling of particularly disturbing HOM's.
In einer Ausführungsform ist vorgesehen, dass die Stege der Wellenleiter bezüglich der Achse des zylinderförmigen Resonatorhohlraums parallel ausgerichtet sind, d.h. die Winkel der Stegwellenleiter zur Achse des zylinderförmigen Resonatorhohlraums beträgt 0 Grad. Diese Ausführung ist die optimale Lösung für den Fall, dass alle HOM's vom Elektronenstrahl mit gleicher Stärke angeregt werden. Ist dies nicht der Fall, so erlaubt die Einstellbarkeit der Orientierung der Wellenleiterstege eine speicherringspezifische Minimierung der HOM's.In one embodiment, it is provided that the ridges of the waveguides are aligned parallel with respect to the axis of the cylindrical resonator cavity, i. the angle of the ridge waveguide to the axis of the cylindrical resonator cavity is 0 degrees. This design is the optimal solution for the case where all HOMs are excited by the electron beam with equal strength. If this is not the case, the adjustability of the orientation of the waveguide webs allows memory ring-specific minimization of the HOM's.
In einer anderen Ausführung weisen die zirkularen getaperten Stegwellenleiter eine variable Steghöhe auf, die über die Länge des getaperten Wellenleiters durch das Polynom zweiter Ordnung y = 3,6328 + 0,0347513x + 0,000183869x2 beschrieben ist, wobei x die Länge (in mm) des getaperten Wellenleiters und y der halbe Abstand der Stege (in mm) zueinander bedeuten. Dieses Stegprofil ist besonders günstig, da die cut-off-Frequenz des Wellenleiter konstant gehalten wird und dadurch der Reflexionsfaktor der getaperten Wellenleitersektion im o.g. Frequenzbereich minimiert ist.In another embodiment, the circular taped ridge waveguides have a variable ridge height described along the length of the tapered waveguide by the second order polynomial y = 3.6328 + 0.0347513x + 0.000183869x 2 , where x is the length (in mm ) of the tapered waveguide and y mean half the distance of the webs (in mm) to each other. This web profile is particularly favorable because the cut-off frequency of the waveguide is kept constant and thus the reflection factor of the tapered waveguide section is minimized in the above frequency range.
Eine weitere Ausführungsform sieht vor, dass der Impedanztransformator eine Sektion aufweist, die als getaperte Koaxialverbindung ausgebildet ist. Dadurch wird die Verwendung von Vakuum-HF-Fenstem beliebiger Ausführungsformen ermöglicht.A further embodiment provides that the impedance transformer has a section which is designed as a tapered coaxial connection. This allows the use of vacuum RF windows of any type.
Der Resonatorhohlraum weist in einer nächsten Ausführungsform zur Optimierung der Shuntimpedanz des Fundamentalmodes eine Strahlrohröffnung mit nasenförmigen Erweiterungen auf. Diese verwendete "nose cone"-Geometrie im Bereich der Strahlrohröffnung bewirkt eine Konzentration des beschleunigenden Feldes auf der Resonatorachse, wodurch eine große Shuntimpedanz bei gleichzeitig hoher HOM-Dämpfungseffizienz erreicht wird. Durch die Realisierung einer hohen Shuntimpedanz ist im Beschleuinigerbetrieb eine energieeffizientere Beschleunigung des Elektronenstrahls i.V. zum Stand der Technik gewährleistet.In a next embodiment, the resonator cavity has a beam tube opening with nose-shaped extensions for optimizing the shunt impedance of the fundamental mode. This used "nose cone" geometry in the area of the beam tube opening causes a concentration of the accelerating field on the resonator axis, whereby a large shunt impedance is achieved with simultaneously high HOM damping efficiency. By implementing a high shunt impedance, a more energy-efficient acceleration of the electron beam i.V. guaranteed to the prior art.
Die erfindungsgemäße Lösung ermöglicht mit ihrer Platz sparenden Bauweise den Einsatz von HOM-gedämpften Resonatoren in den meisten SynchrotronStrahlungsquellen. Die maximalen lokalen thermischen Leistungsdichten auf der inneren Oberfläche des Resonators im Übergangsbereich zwischen Wellenleiter und Resonatorwand (bei externer Anregung des Grundmodes) sind bei Verwendung runder Wellenleiter um etwa 50 % geringer als bei rechteckförmigen Wellenleitern. Dies erlaubt eine wesentlich einfachere Gestaltung der Kühlwasserkanäle..Aus fertigungstechnischer. Sicht ist die Verbindung eines runden Wellenleiters mit einem zylinderförmigen Resonator einfacher und kostengünstiger als die Verbindung eines rechteckförmigen Wellenleiters mit einer sphärischen oder glockenförmigen Ausführung. Im Vergleich zu den im Stand der Technik erwähnten Lösungen betragen die Herstellungungskosten nur etwa 40 %. Die für die Gestaltung der Strahlrohröffnung des Resonatorhohlraumes genutzte "nose cone"-Geometrie bewirkt - wie bereits erwähnt - eine hohe Shuntimpedanz des Fundamentalmodes bei gleichzeitiger effizienter HOM-Dämpfung.The solution according to the invention, with its space-saving design, allows the use of HOM-damped resonators in most synchrotron radiation sources. The maximum local thermal power densities on the inner surface of the resonator in the transition region between waveguide and resonator wall (with external excitation of the fundamental mode) are about 50% lower when using circular waveguides than with rectangular waveguides. This allows a much simpler design of the cooling water channels .. From manufacturing technology. Point of view, the connection of a circular waveguide with a cylindrical resonator is simpler and less expensive than the connection of a rectangular waveguide with a spherical or bell-shaped design. Compared to the solutions mentioned in the prior art, the production costs are only about 40%. The "nose cone" geometry used for the design of the beam tube opening of the resonator cavity causes - as already mentioned - a high shunt impedance of the fundamental mode with simultaneous efficient HOM attenuation.
Die Erfindung soll im folgenden Ausführungsbeispiel anhand von Zeichnungen näher erläutert werden.The invention will be explained in more detail in the following embodiment with reference to drawings.
Dabei zeigen
- Fig. 1
- schematische Gesamtdarstellung eines HOM-gedämften HF- Resonators in Strahlrichtung;
- Fig. 2
- schematische Seitenansicht gemäß
Fig. 1 ; . - Fig. 3
- schematisch eine räumliche Schnittzeichnung durch einen HOM- gedämpften HF-Resonator gemäß
Fig. 1 ; - Fig. 4
- einen Stegwellenleiter schematisch im Längsschnitt.
- Fig. 1
- schematic overall representation of a HOM-dimmed RF resonator in the beam direction;
- Fig. 2
- schematic side view according to
Fig. 1 ; , - Fig. 3
- schematically a spatial sectional drawing through a HOM attenuated RF resonator according to
Fig. 1 ; - Fig. 4
- a ridge waveguide schematically in longitudinal section.
In
In der in
Die
Jedem Wellenleiter 2.1; 2.2; 2.3 ist - wie in
In der
Numerisch konnte nachgewiesen werden, dass die erfindungsgemäße Lösung die Realisierung eines Beschleunigerresonators erlaubt, der die fast vollständige Unterdrückung von multibunch-Instabilitäten in modernen Synchrotronstrahlungsquellen der dritten Generation gewährleistet. Ausserdem konnte gezeigt werden, dass die maximalen Stromschwellen in Synchrotronstrahlungsquellen i.V. zum Stand der Technik für Resonatoren mindestens um den Faktor 2 erhöht werden.It has been demonstrated numerically that the solution according to the invention permits the realization of an accelerator resonator which ensures the almost complete suppression of multibunch instabilities in modern synchrotron radiation sources of the third generation. In addition, it was shown that the maximum current thresholds in synchrotron radiation sources i.V. be increased to the state of the art for resonators at least by a factor of 2.
Claims (5)
- HOM attenuated high frequency resonator provided with a cylindrical resonator cavity (1) on the outer surface of which are arranged three circular tapered waveguides (2.1; 2.2; 2.3) with two symmetrically arranged ridges (S1.1 and S2.1; S1.2 and S2.2; S1.3 and S2.3) each, the cut-off frequency of the waveguide base mode being kept constant over the length of the waveguides (2.1; 2.2; 2.3) by varying the height of the ridges, and the ridge waveguides (2.1; 2.2; 2.3) being provided at their end of the smaller diameter with an impedance transformer (6.1; 6.2; 6.3) each for the broadband adjustment of the coaxial line,
characterised by the fact that
the waveguides (2.1; 2.2; 2.3) with two symmetrically arranged ridges (S1.1 and S2.1; S1.2 and S2.2; SS1.3 and S2.3) each for adjusting an asymmetry relative to the center plane of the cylindrical resonator cavity (1) are arranged offset in direction of its longitudinal axis on the outer surface of the resonator cavity (1),
the waveguides (2.1; 2.2; 2.3) with the two symmetrically arranged ridges (S1.1. and S2.1; S1.2 and S2.2; S1.3 and S2.3) each are structured for adjusting their angle relative to the axis of the cylindrical resonator cavity (1) and
the ridges (S1.1 and S2.1; S1.2 and S2.2; S1.3 and S2.3) of the waveguides (2.1; 2.2; 2.3) protrude into the cylindrical resonator cavity (1) such that the modes of higher order are optimally coupled. - HOM attenuated resonator of claim 1,
characterised by the fact that
the ridges (S1.1 and S2.1; S1.2 and S2.2; S1.3 and S2.3) of the waveguides (2.1; 2.2; 2.3) are arranged parallel relative to the axis of the cylindrical resonator cavity (1). - HOM attenuated resonator of claim 1,
characterised by the fact that
the circular tapered ridge waveguides (2.1; 2.2; 2.3) have a ridge height defined over the length of the tapered waverguides (2.1; 2.2; 2.3) by the second order polynomial
wherein x is the length (in mm) of the tapered waverguide and y is half the spacing of the ridges (in mm) between each other. - HOM attenuated resonator of claim 1,
characterised by the fact that
each impedance transformer (6.1; 6.2; 6.3) is provided with a section (7.1; 7.2; 7.3) structured as a coaxial line. - HOM attenuated resonator of claim 1,
characterised by the fact that
the resonator cavity (1) is provided with a nose cone shaped beam hole (R) for the concentration of the accelerating field on the resonator axis.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10129774 | 2001-06-15 | ||
DE10129774A DE10129774C2 (en) | 2001-06-15 | 2001-06-15 | HOM-damped high-frequency resonator |
PCT/DE2002/002230 WO2002104086A1 (en) | 2001-06-15 | 2002-06-13 | Hom damped high-frequency resonator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1400158A1 EP1400158A1 (en) | 2004-03-24 |
EP1400158B1 true EP1400158B1 (en) | 2009-03-25 |
Family
ID=7688857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02750795A Expired - Lifetime EP1400158B1 (en) | 2001-06-15 | 2002-06-13 | Hom damped high-frequency resonator |
Country Status (5)
Country | Link |
---|---|
US (1) | US7973621B2 (en) |
EP (1) | EP1400158B1 (en) |
AT (1) | ATE427028T1 (en) |
DE (2) | DE10129774C2 (en) |
WO (1) | WO2002104086A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020127132B4 (en) | 2020-10-15 | 2023-03-30 | Helmholtz-Zentrum Berlin für Materialien und Energie Gesellschaft mit beschränkter Haftung | HOM-damped superconducting cavity resonator, use of the same and method for its production |
FR3125226A1 (en) | 2021-07-19 | 2023-01-20 | L'oreal | SUNSCREEN SPRAYER |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096457A (en) * | 1976-10-29 | 1978-06-20 | Harvard Industries, Inc. | Low pass harmonic absorber |
JPH0737698A (en) * | 1993-07-23 | 1995-02-07 | Toshiba Corp | High-frequency accelerating cavity |
-
2001
- 2001-06-15 DE DE10129774A patent/DE10129774C2/en not_active Expired - Fee Related
-
2002
- 2002-06-13 EP EP02750795A patent/EP1400158B1/en not_active Expired - Lifetime
- 2002-06-13 US US10/480,320 patent/US7973621B2/en not_active Expired - Fee Related
- 2002-06-13 DE DE50213392T patent/DE50213392D1/en not_active Expired - Lifetime
- 2002-06-13 AT AT02750795T patent/ATE427028T1/en not_active IP Right Cessation
- 2002-06-13 WO PCT/DE2002/002230 patent/WO2002104086A1/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE50213392D1 (en) | 2009-05-07 |
DE10129774A1 (en) | 2003-01-30 |
ATE427028T1 (en) | 2009-04-15 |
US7973621B2 (en) | 2011-07-05 |
WO2002104086A1 (en) | 2002-12-27 |
EP1400158A1 (en) | 2004-03-24 |
US20040164822A1 (en) | 2004-08-26 |
DE10129774C2 (en) | 2003-07-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3853507T2 (en) | Deflection magnet. | |
DE1156454B (en) | Method and device for the transmission of high frequency by means of an essentially cylindrical bundle of continuously free waves | |
DE4426597C2 (en) | Extended interaction output circuit using a modified disk-loaded waveguide | |
EP1400158B1 (en) | Hom damped high-frequency resonator | |
DE1138872B (en) | Particle accelerator for charge carriers, in which an energy exchange takes place between the charge carriers and a high-frequency electromagnetic traveling wave | |
DE1123775B (en) | Electrostatic focusing arrangement for the bundled guidance of the electron beam of a running field tube | |
DE1034284B (en) | Low-noise electron beam tubes like a traveling wave tube | |
EP0177668B1 (en) | Device for directing an electron beam | |
DE2738644C2 (en) | Coupling device for high frequency tubes | |
DE2525845C3 (en) | Broadband low-reflection delay line and method for making it | |
DE2208570A1 (en) | High frequency tube | |
DE3525275A1 (en) | MICROWAVE TUBES | |
DE1541929B1 (en) | Run-time tube for wide frequency band | |
DE1011004B (en) | Waveguide for traveling wave tubes | |
DE2842576A1 (en) | POLARIZATION SOFT | |
EP0802576A1 (en) | Coupling for two electromagnetic waveguides of different cross section | |
DE3134583A1 (en) | GYROTRON CAVITY RESONATOR | |
WO2011124350A1 (en) | Coaxial conductor structure | |
DE1566031A1 (en) | High frequency discharge device with speed modulation | |
DE1098625B (en) | Magnetic bundling system for bundled guidance of one (several) electron flow (s) by means of a homogeneous magnetic field along a larger distance, especially for traveling wave tubes | |
DE2353555A1 (en) | RUNTIME TUBE | |
DE3030114A1 (en) | SPIRAL COUPLED WAVE PIPES | |
DE3610584A1 (en) | HIGH ENERGY ACCELERATOR | |
DE10040320C1 (en) | Inner conductor for coaxial gyrotron provided with impedance corrugations of varying depth between input funnel and output funnel of resonator center piece | |
DE2636633B2 (en) | Delay line for traveling wave tubes, especially for amplifying mm waves |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20040115 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Extension state: AL LT LV MK RO SI |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HELMHOLTZ-ZENTRUM BERLIN FUER MATERIALIEN UND ENER |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MARHAUSER, FRANK Inventor name: WEIHRETER, ERNST |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REF | Corresponds to: |
Ref document number: 50213392 Country of ref document: DE Date of ref document: 20090507 Kind code of ref document: P |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090625 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FD4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090706 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090901 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 |
|
BERE | Be: lapsed |
Owner name: HELMHOLTZ-ZENTRUM BERLIN FUR MATERIALIEN UND ENER Effective date: 20090630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090630 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 Ref country code: IE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20091229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090626 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20100423 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20100423 Year of fee payment: 9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090325 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20110613 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110630 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110613 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 50213392 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R084 Ref document number: 50213392 Country of ref document: DE Effective date: 20120914 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 16 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 17 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20210621 Year of fee payment: 20 Ref country code: FR Payment date: 20210621 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 50213392 Country of ref document: DE |