WO2012041540A1 - Cavité hf dotée d'un émetteur - Google Patents

Cavité hf dotée d'un émetteur Download PDF

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Publication number
WO2012041540A1
WO2012041540A1 PCT/EP2011/058328 EP2011058328W WO2012041540A1 WO 2012041540 A1 WO2012041540 A1 WO 2012041540A1 EP 2011058328 W EP2011058328 W EP 2011058328W WO 2012041540 A1 WO2012041540 A1 WO 2012041540A1
Authority
WO
WIPO (PCT)
Prior art keywords
cavity
slot
transmitter
wall structure
space
Prior art date
Application number
PCT/EP2011/058328
Other languages
German (de)
English (en)
Inventor
Oliver Heid
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2012041540A1 publication Critical patent/WO2012041540A1/fr

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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
    • H05H7/00—Details of devices of the types covered by groups H05H9/00, H05H11/00, H05H13/00
    • H05H7/02—Circuits or systems for supplying or feeding radio-frequency energy
    • 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 invention relates to an RF cavity according to claim 1, a particle accelerator according to claim 10 and radar radiation system according to claim 11.
  • the object of the invention is to provide an improvedgainzu- An ⁇ order with an RF cavity with an RF transmitter.
  • the object of the invention is achieved by the RF cavity according to Pa ⁇ tenter 1, the particle accelerator according to claim 14 and the radar radiation system according to claim 15.
  • An advantage of the described RF cavity is that the wall structure of the RF cavity has a partial slot to which an RF transmitter is connected. In this way, an efficient coupling of the RF power is possible. Compared to a whole around the circumference of the wall structure which run slot, the arrangement described the pre ⁇ part on that, with less power, a higher voltage can be ⁇ coupled.
  • the slot is oriented substantially perpendicular or parallel to the longitudinal axis of, for example, the tubular wall structure of the RF cavity. In this way, efficient coupling and excitation is made possible ei ⁇ nes RF field in the wall structure.
  • a plurality of slots each having an RF transmitter are provided. In this way, the high-frequency power can be coupled in via the wall structure of the HF cavity. This achieves the construction of a more uniform high-frequency electromagnetic field.
  • the slots are the same length and / or the same width. Due to the identical design of the slots identical boundary conditions for the coupling of the high frequency are given and thus a symmetrical design of the high frequency field is guaranteed.
  • the cavity is designed as a resonator so ⁇ the formation of a resonance mode is possible.
  • the slots of the RF transmitter are formed on a current amplitude of a resonant mode of the electromagnetic high frequency field of the resonator. In this way, a good coupling into the resonator is possible.
  • the shield has a relative to the RF cavity different Resonanzfre acid sequence. In this way it is achieved that the coupling of the RF transmitter is improved, since for the RF transmitter in the resonant frequency of the RF cavity, the electrical impedance of the RF cavity is small compared to the electrical impedance of the shield. Thus, the largest proportion of the current emitted by the RF transmitter current flows in the inside of the RF cavity and not in the inside of the shield.
  • the RF current for injecting the RF power into the RF cavity can be injected into the slot edges of the slot.
  • the RF cavity has a resonant structure consisting of the resonator as the first space, a second space substantially closed to the frequency of the RF energy, and the slot as a slot-shaped connection between the first and the second space, wherein the second space is formed by the shield case and the wall.
  • the first and second spaces are formed so that the electromagnetic power injected into the slot substantially branches into the RF cavity.
  • the HF production, in particular the RF transmitter is in the re- sonante structure, in particular in the second space, integ riert ⁇ .
  • the RF transmitter has an inverter and can be connected to a current source via a DC line.
  • the DC clamping voltage is ⁇ ⁇ vice converts into an AC voltage on the site where the RF transmitter.
  • the converter can in turn be incorporated in the resonant structure, in particular in the second space.
  • the RF transmitter is connected to a coaxial line to a power source, wherein an electrically conductive Ablemantel the coaxial cable electrically conductive with the
  • Shielding is connected.
  • the central conductor of the coaxial ⁇ alnapss is connected to an electrical input of the RF transmitter. In this way, a good electrical From ⁇ shielding of the RF transmitter is achieved.
  • the RF cavity is part of a particle accelerator or Radarstrahlungssys ⁇ tems. The invention will be explained in more detail below with reference to FIGS. Show it
  • FIG. 1 shows a schematic plan view of an HF cavity
  • FIG. 2 shows a cross section through the HF cavity
  • FIG. 3 shows a cross section through a slot of the HF cavity
  • FIG. 4 shows an enlarged cross section through two slots of the HF cavity
  • FIG. 5 shows a HF cavity designed as a coaxial line
  • FIG. 6 shows a particle accelerator
  • Figure 7 shows a coaxial cable as a supply line for the RF transmitter
  • Figure 8 is a coupling device with parasitic current
  • FIG. 9 shows a further embodiment of an HF cavity.
  • FIG. 1 shows a side view of an HF cavity 11, which is preferably tubular.
  • Coupling devices 13 for coupling RF power are provided around the outer circumference of the RF cavity 11.
  • FIG. 2 shows a schematic representation of a front view of the HF cavity 11 of FIG. 1.
  • Figure 3 shows a longitudinal section through a coupling device 13 of the RF cavity 11. Shown is only one wall side of the RF cavity 11 in the area in which a coupling device 13 is located.
  • the RF cavity 11 has a elekt ⁇ driven conductive wall 15 having a first portion 21 and a second portion 23 which are separated in the region of the coupling-in device 13 through a slot 60 from one another.
  • an insulation 27 is disposed in the slot 60, which simultaneously represents a vacuum seal is ⁇ .
  • the conductive wall 15 has an inner side 19, which is directed into the cavity of the RF cavity 11.
  • the conductive wall 15 has an outwardly directed outer page 17. On the outer side 17 is the Einkop ⁇ pelvoretti 13 for the RF power.
  • the coupling device 13 comprises an RF transmitter 64 having a plurality of solid-state transistors 29 which are in direct contact with the two parallel tabs 25 which define the slot on opposite sides.
  • the tabs 25 are formed from parts of the wall 15, which are bent in the region of the slot 60 to the outside.
  • the solid state transistors 29 are connected via leads 31 to a DC source, not shown here.
  • control lines are provided with which the transistors 29 can be driven for transmitting RF power.
  • the RF power is coupled via a RF transmitter 64 applied to the tabs 25 high-frequency AC voltage in the wall 15. With a corresponding activation, the transistors 29 in the lugs 25 and thus in the conductive wall 15 induce high-frequency alternating currents which propagate along the conductive wall 15.
  • the tabs 25 represent Einkoppelfulnesse. Wanted is a propagation along the inner side 19 of the conductive wall 15 along and not the outer side 17 of the wall 15.
  • a Ab ⁇ screen housing 35 is provided, which on the outer side 17 of the wall 15th is applied and electrically connected to the outer ⁇ side 17 of the wall 15 is connected.
  • the shield case 35 is formed in the form of a closed cover which covers the entire slot 60 with the RF transmitter 64.
  • the shielding housing 35 is electrically connected to an edge region 62 around the slot 60 with the outside 17 electrically conductive.
  • the shield case 35 is at least partially made of an electrically conductive material.
  • the shielding device 35 is preferably made of copper gebil ⁇ det and protects both the emission of electromagnetic radiation through the RF transmitter 64 to the outside and the irradiation of electromagnetic radiation to the RF transmitter from the outside.
  • Figure 4 shows a cross section according to the line IV-IV of Fi gur ⁇ 3.
  • three RF transmitter 64 are arranged at a slot in a shield 35th
  • the slots 60 of the launcher 13 are preferential ⁇ , on a circular line perpendicular to the longitudinal extension of the cylindrical cavity. 11 Depending on the selected embodiment, the slots 60 may be different borrowed length and / or different widths.
  • the slots may also be arranged in a different orientation, in particular offset laterally relative to a circular line perpendicular to the longitudinal extension of the cavity 11.
  • the slots can be arranged with the longitudinal side parallel to the longitudinal axis of the RF cavity 11 angeord ⁇ net, wherein preferably a plurality of slots are arranged parallel zuein ⁇ other.
  • the slots are ver ⁇ divides the circumference of the RF cavity 11 is arranged.
  • Slot is assigned at least one RF transmitter. Depending on the chosen embodiment, more than one can also be used
  • Slot 60 may be arranged in a shield case.
  • Figure 5 shows a RF cavity, which is formed as a coaxial conductive Ver ⁇ connection 47 with an inner conductor 50th
  • An RF power can be fed into the coaxial connection via the coupling device 13 arranged on the outer conductor 49.
  • FIG. 6 shows an accelerator unit 65, in particular egg ⁇ NEN linear particle accelerator, along its longitudinal axis a plurality of RF-cavities 11, 11 '''as examples For example, in Figure 1 are shown, one behind the other angeord ⁇ net. Since the RF currents propagate only on the inside of the RF cavities, the RF cavities in the high-frequency range are decoupled from one another and can therefore be controlled individually by a control device 45, thereby achieving a flexible tuning of the RF cavities to a desired acceleration leaves.
  • the RF transmitters can preferably be controlled individually.
  • a transmitter in particular a radar radiation system, can be constructed with a control device 45 having only one cavity 14 and coupling devices 13 according to FIG.
  • FIG. 7 shows an embodiment in which a coaxial line 66 is provided for supplying the RF transmitter with direct current, wherein an inner conductor 67 of the coaxial line with a connection of the RF transmitter 64 and an electrical outer conductor 68 of the coaxial cable with the shielding housing 35 elekt ⁇ is conducting connected. Between the inner conductor 67 and the outer conductor 68, a first insulation 70 is arranged. The outer conductor 68 is surrounded by a second insulation 69. The outer conductor 68 may be connected to ground.
  • Figure 8 shows a schematic representation of the Einkoppelvor- direction 13 with a parasitic current I on the outside of the wall 15 and the inner sides of the shield 35, which is minimized by the choice of the geometry and material of the shielding ⁇ housing 35th
  • the RF generation or RF conversion is integrated into the resonant structure.
  • the inverter is built into a structure consisting of the resonator as the first space and a second space substantially closed to the frequency of the RF energy and one, e.g. B.
  • the second space is formed by the shield case 35 and the wall 15.
  • the HF current is injected into slot edges. Both rooms are designed to fit into the slot injected electromagnetic power branches mainly into the RF cavity 11, which is preferably designed as an RF resonator. This is he ⁇ passes through the following measures:
  • edges in the RF resonator have a direction component perpendicular to the wall current of the desired resonance mode.
  • the RF resonator is preferably operated near a resonant Stel ⁇ le, wherein the slot of the RF resonator sufficiently close to a current loop, that is at the point with the greatest power, the corresponding resonant mode.
  • the RF resonator becomes low-ohmic at this frequency compared to the second space formed by the shield case 35 and the wall 15.
  • the impedance of the shield for the output from the RF transmitter 64 RF frequency is at least 10 times greater than the impedance of the RF cavity 11 at the resonant frequency of the RF cavity.
  • the feed edges of the slot are preferably located close to a current node line of the resonance mode or the feed edges of the slot are substantially perpendicular to the wall current direction of the corresponding resonant mode.
  • the supply of the inverter can take place such that the enclosing space is transparent to the electromagnetic field generated by the SpeI ⁇ sestrom, z.
  • the enclosing space is an extension of the space between the jacket and inner conductor of the coaxial cable ⁇ represents and the jacket of the cable to the wall of the Shield housing is connected.
  • FIG. 9 shows the embodiment of the HF cavity 11 in a schematic representation, in which the slots 60 in the longitudinal direction Direction of the RF cavity and are arranged parallel to each other.
  • the RF transmitters 64 couple the RF frequency into the long sides and / or the transverse sides of the slots 60.
  • the slots 60 are preferably distributed uniformly around the circumference of the RF cavity.
  • front and rear transverse edges 72, 71 of the slots 60 are each arranged on a circular plane perpendicular to the longitudinal axis of the HF cavity 11.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Particle Accelerators (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)

Abstract

L'invention concerne une cavité HF comprenant une structure de paroi orientée selon un axe longitudinal, et un émetteur HF qui est raccordé à la structure de paroi pour permettre l'injection d'un rayonnement HF. La structure de paroi comporte une fente qui est délimitée par des côtés longitudinaux opposés de la structure de paroi, l'émetteur HF est raccordé électriquement aux deux côtés longitudinaux de la fente, et la cavité comporte un boîtier de blindage comprenant un matériau électroconducteur. Le boîtier de blindage est relié par liaison électroconductrice à la structure de paroi, et recouvre la fente et l'émetteur HF, et la fente ne s'étend que sur une partie de la périphérie de la structure de paroi.
PCT/EP2011/058328 2010-09-30 2011-05-23 Cavité hf dotée d'un émetteur WO2012041540A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010041758.0 2010-09-30
DE201010041758 DE102010041758B4 (de) 2010-09-30 2010-09-30 HF-Kavität mit Sender

Publications (1)

Publication Number Publication Date
WO2012041540A1 true WO2012041540A1 (fr) 2012-04-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/058328 WO2012041540A1 (fr) 2010-09-30 2011-05-23 Cavité hf dotée d'un émetteur

Country Status (2)

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DE (1) DE102010041758B4 (fr)
WO (1) WO2012041540A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016099621A1 (fr) * 2014-12-18 2016-06-23 General Electric Company Générateur de puissance radioélectrique conçu pour réduire les émissions électromagnétiques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495125A (en) * 1968-03-05 1970-02-10 Atomic Energy Commission Quarter-wave transmission line radio frequency voltage step-up transformer
US4707668A (en) 1986-05-05 1987-11-17 The United States Of America As Represented By The Department Of Energy Method and apparatus for transferring and injecting rf energy from a generator to a resonant load
EP0606870A1 (fr) 1993-01-11 1994-07-20 Polytechnic University Cavité active à radio-fréquence

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009053624A1 (de) * 2009-11-17 2011-05-19 Siemens Aktiengesellschaft HF-Kavität sowie Beschleuniger mit einer derartigen HF-Kavität

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3495125A (en) * 1968-03-05 1970-02-10 Atomic Energy Commission Quarter-wave transmission line radio frequency voltage step-up transformer
US4707668A (en) 1986-05-05 1987-11-17 The United States Of America As Represented By The Department Of Energy Method and apparatus for transferring and injecting rf energy from a generator to a resonant load
EP0606870A1 (fr) 1993-01-11 1994-07-20 Polytechnic University Cavité active à radio-fréquence
US5497050A (en) * 1993-01-11 1996-03-05 Polytechnic University Active RF cavity including a plurality of solid state transistors

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HEID ET AL.: "Compact Solid State Direct drive RF Linac", PROCEEDINGS OF THE CONFERENCE, THPD002, June 2010 (2010-06-01), pages 4278 - 4280, XP002658698, ISBN: 978-92-9083-352-9, Retrieved from the Internet <URL:http://accelconf.web.cern.ch/AccelConf/IPAC10/papers/thpd002.pdf> [retrieved on 20110908] *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016099621A1 (fr) * 2014-12-18 2016-06-23 General Electric Company Générateur de puissance radioélectrique conçu pour réduire les émissions électromagnétiques
US9456532B2 (en) 2014-12-18 2016-09-27 General Electric Company Radio-frequency power generator configured to reduce electromagnetic emissions
CN107006114A (zh) * 2014-12-18 2017-08-01 通用电气公司 减少电磁辐射的射频功率发生器
RU2698816C2 (ru) * 2014-12-18 2019-08-30 Дженерал Электрик Компани Радиочастотный генератор мощности, сконфигурированный для уменьшения электромагнитных излучений

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DE102010041758B4 (de) 2015-04-23
DE102010041758A1 (de) 2012-04-05

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