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EP3389055B1 - Équipement à rayons x destiné à la production de rayons x à haute énergie - Google Patents

Équipement à rayons x destiné à la production de rayons x à haute énergie

Info

Publication number
EP3389055B1
EP3389055B1 EP17165888.3A EP17165888A EP3389055B1 EP 3389055 B1 EP3389055 B1 EP 3389055B1 EP 17165888 A EP17165888 A EP 17165888A EP 3389055 B1 EP3389055 B1 EP 3389055B1
Authority
EP
European Patent Office
Prior art keywords
ray
target
electron beam
linear accelerator
electrons
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.)
Active
Application number
EP17165888.3A
Other languages
German (de)
English (en)
Other versions
EP3389055A1 (fr
Inventor
Marvin Möller
Sven Müller
Martin Koschmieder
Stefan Willing
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Healthineers AG
Original Assignee
Siemens Healthineers AG
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 Healthineers AG filed Critical Siemens Healthineers AG
Priority to EP17165888.3A priority Critical patent/EP3389055B1/fr
Priority to US15/947,934 priority patent/US10825639B2/en
Priority to CN201810316877.XA priority patent/CN108696977B/zh
Publication of EP3389055A1 publication Critical patent/EP3389055A1/fr
Application granted granted Critical
Publication of EP3389055B1 publication Critical patent/EP3389055B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/52—Target size or shape; Direction of electron beam, e.g. in tubes with one anode and more than one cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/16—Vessels; Containers; Shields associated therewith
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • 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
    • H05H6/00—Targets for producing nuclear reactions
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/10—Scattering devices; Absorbing devices; Ionising radiation filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/08—Targets (anodes) and X-ray converters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2235/00—X-ray tubes
    • H01J2235/12—Cooling
    • H01J2235/1225—Cooling characterised by method
    • H01J2235/1262—Circulating fluids
    • 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
    • H05H9/04—Standing-wave linear accelerators
    • H05H9/048—Lepton LINACS

Definitions

  • the invention relates to an X-ray device for generating high-energy X-rays, comprising a linear accelerator and a target.
  • the linear accelerator is designed to generate X-rays and to generate an electron beam directed at the target, the kinetic energy of which per electron is at least 1 MeV.
  • X-ray systems typically have an electron beam source that delivers an accelerated electron beam to a target (also known as the target material). When the electrons strike the target, X-rays are generated in the area of the so-called focal spot.
  • the electron beam source is usually formed by a cathode, with the emerging electrodes being accelerated by an applied acceleration field toward an anode, which in such designs forms the target.
  • a linear accelerator as the electron beam source, which delivers an electron beam directed at the target.
  • An X-ray tube for medical imaging such as computed tomography. It consists of a cathode and an anode.
  • the electron beam is directed onto a target to generate X-rays.
  • the electron beam passes through a diaphragm channel that borders the target and is incorporated into a diaphragm body.
  • the area around the diaphragm channel must be as solid as possible; water cooling may be required.
  • GB 645 509 A discloses an electromagnetic modular waveguide of any length while maintaining a vacuum.
  • GB 665 998 A describes the use of such a modular waveguide to accelerate charged particles.
  • the object of the present invention is to provide an X-ray device for generating high-energy X-rays in which the extent of the focal spot on the target can be minimized.
  • An X-ray device for generating high-energy X-rays comprises a linear accelerator and a target.
  • the target typically consists of a target material which is used to generate X-rays by deceleration. of the accelerated electrons.
  • the area of the target in which this conversion takes place is referred to as the focal spot.
  • the linear accelerator is further designed and aligned to generate an electron beam directed at the target, the kinetic energy per electron of which is at least 1 MeV.
  • an aperture is arranged in the beam path of the electron beam between the linear accelerator and the target, said aperture having an edge region surrounding an aperture opening, the material thickness of which, in the propagation direction of the electron beam, is less than 10% of the average range of electrons of the generated kinetic energy in the material of the edge region.
  • the invention takes the approach of providing an aperture that is not designed to absorb the electrons of the generated energy range to any noticeable extent; rather, it is envisaged that the interaction should be essentially limited to inelastic or elastic scattering processes.
  • the aperture at least in the edge region delimiting the aperture opening, has a material thickness that is only a fraction of the average range of electrons of the generated kinetic energy in the material of the edge region.
  • the resulting divergently propagating electrons subsequently generally no longer impact the target material.
  • the area of the electron beam that creates the focal spot is thus essentially limited to the area of the aperture.
  • the energy transfer to the aperture is minimal, as this is essentially based only on inelastic scattering effects. This results, among other things, in less heat input to the aperture, which therefore does not necessarily require additional cooling.
  • the edge area of the aperture forms a scattering body (also known as a diffuser) for the electrons passing through it, within the energy range specified by the applied accelerating voltage.
  • the randomly deflected electrons can be absorbed in other areas of the X-ray system and are thus no longer visible in the effective beam field of the generated X-ray radiation.
  • Limiting the size of the focal spot on the target results, among other things, in improved image quality in imaging techniques.
  • the acquired images exhibit less blurring and smaller penumbras because the size of the focal spot approximates that of an ideal point source.
  • Possible fields of application include, for example, radiography, particularly the non-destructive testing of workpieces, components, or other objects; the inspection of transported goods, particularly in the context of freight inspection, where, for example, trucks or freight containers for trains or container ships are x-rayed to make their contents visible; and applications in the field of medicine, particularly in the field of radiation therapy.
  • the limitation of the focal spot provided by the invention allows for more precise dose distribution in radiotherapy, particularly in intensity-modulated radiotherapy, since the penumbra of the collimator limiting the photon beam field is smaller.
  • the X-ray devices can be optimized in terms of weight, since downstream collimators for collimating the generated X-rays can be eliminated or at least limited.
  • the aperture consists of a thin sheet, particularly made of steel or another transition metal or alloy.
  • Another particularly preferred non-metallic material for the aperture is, for example, graphite.
  • the material and thickness of the aperture are matched to the kinetic energy of the electrons generated during the intended use of the X-ray device.
  • the material thickness is typically in the range of one or more millimeters if it is made of a lightweight material such as graphite.
  • Apertures made of a heavier material, particularly metal have thinner material thicknesses, for example, in the submillimeter range, particularly in the range of approximately 1/10 mm.
  • At least the edge region of the aperture that scatters the electrons is formed by one or more foils.
  • Such designs can be viewed as cost-effective implementations of a scattering body of sufficiently small thickness, ensuring that the interaction of the generated kinetic energy with the electrons is essentially limited to scattering processes. If the region of the aperture that is responsible for the scattering of the electrons is formed by such a foil material, the heat input is minimal. Therefore, apertures designed in this way do not necessarily need to be actively cooled during operation of the X-ray device.
  • the foil is preferably made of a metal.
  • the aperture or at least the scattering edge area of the aperture is made of titanium.
  • the aperture or at least the edge area surrounding the aperture is made of stainless steel, tungsten, or copper. or from another transition metal or transition metal alloy.
  • the aperture in particular the aperture described above consisting of at least one metallic foil, can be cooled by a cooling device, in particular a water cooling device, in one possible embodiment. This ensures that even the relatively low heat transfer caused by inelastic scattering processes can be reliably dissipated.
  • a collimator is arranged in the beam path of the X-rays generated by the target. This serves to limit the effective beam field of the generated X-rays. If the location of X-ray generation (focal spot) is small, the penumbra at the edges of the effective beam field will also be small.
  • a vacuum housing surrounding at least the linear accelerator, the aperture, and the target, or a vacuum envelope surrounding these components is provided at least in some regions with a shield suitable for absorbing X-ray radiation caused by scattered electrons that strike the vacuum housing and are thereby slowed down.
  • the resulting X-ray radiation can be spectrally influenced by the choice of wall material and is preferably shielded locally by a shield arranged outside the vacuum housing.
  • the shield is provided inside the vacuum housing. Since the vacuum housing of the X-ray device is evacuated, the shield provided inside the vacuum housing preferably consists of a material with high vapor pressure; particularly preferably, the shield comprises elements with a low atomic number.
  • Materials with a low vapor pressure can also be used for shielding on the outside of the vacuum housing.
  • This shield consists, for example, of Made entirely or partially of lead. Since the scattered electrons are not absorbed by the aperture material, they propagate divergently to the direction of propagation of the electron beam and hit the vacuum enclosure, which is covered with shielding materials, where they are absorbed. Since the absorption of the electrons scattered by the aperture does not occur in a highly localized area, but rather in large areas of the vacuum enclosure, external cooling is generally not necessary here either.
  • the vacuum housing of the X-ray device can be cooled by means of a fluid cooling system.
  • the areas provided with the shielding exhibit increased absorption for electrons of the generated kinetic energy compared to areas of the vacuum housing without shielding.
  • it is intended to provide shielding only for those areas that are relevant for the absorption of scattered electrons. This contributes, among other things, to weight reduction.
  • the shielded regions preferably lie exclusively within a solid angle range emanating from the aperture and extending in the propagation direction of the electron beam.
  • the solid angle range is preferably formed by a plurality of superimposed scattering cones, the cone apices of which lie within the edge region surrounding the aperture.
  • the shield is arranged where the electrons scattered in the edge region of the aperture are at least highly likely to strike.
  • the solid angle range to be shielded corresponds to a medium scattering angle range of the electrons scattered in the edge region of the aperture.
  • the deflection of the scattered electrons with respect to the propagation direction of the unscattered electrons is smaller at higher energies than for electrons with lower kinetic energy.
  • the shielding in X-ray systems designed to provide higher-energy X-rays can be limited to a smaller solid angle range concentrated around the propagation direction of the unscattered electron beam.
  • the mean scattering angle range is assumed to be a scattering cone centered around the mean scattering angle, whose aperture angle corresponds to a mean deviation characteristic of the scattering process, in particular a standard deviation.
  • the mean scattering angle refers to the mean value of the angles of the scattered electrons to the acceleration axis, which corresponds to the propagation direction of the unscattered electrons.
  • the linear accelerator of the X-ray device is preferably designed to generate an electron beam whose kinetic energy per electron is less than 20 MeV.
  • the X-ray device is therefore preferably suitable for the already described applications in the field of radioscopy or radiology.
  • the invention further relates to a method for producing an X-ray device for generating high-energy X-rays, in particular a method for producing one of the X-ray devices described above.
  • the X-ray device comprises a linear accelerator and a target, wherein the linear accelerator is designed to generate X-rays by generating an electron beam directed at the target, the kinetic energy per electron being at least 1 MeV.
  • a component is arranged in the beam path of the electron beam between the linear accelerator and the target, the material thickness of which, in the propagation direction of the electron beam, is less than 10% of the average range of electrons of the generated kinetic energy in the material of the component.
  • a diaphragm opening is introduced into the component by exposing the component to an electron beam generated by the linear accelerator. In this sense, after the diaphragm opening has been introduced, the component forms the previously described diaphragm.
  • the invention utilizes this property to introduce the above-described aperture into the component.
  • the current intensity of the accelerated electron beam provided by the linear accelerator is increased, if necessary, compared to the current intensity generated during normal operation in order to burn a hole into the component inserted in the beam path – which, for example, is formed by one or more of the above-described foils.
  • the dimensioning of the aperture thus created corresponds to the central region of the electron beam. and thus automatically an aperture with the scattering characteristics described above for the electrons propagating away from the central region. Complex adjustment of an aperture already equipped with an aperture can be avoided, thus saving assembly and adjustment costs.
  • Figure 1 shows an X-ray device 1 according to a first embodiment of the invention in a schematic sectional view.
  • the X-ray device 1 comprises a linear accelerator 2, shown only schematically, which is designed to generate an electron beam E with a kinetic energy of at least 1 MeV per electron.
  • the electron beam E is directed at a target 3.
  • the target 3 emits X-ray radiation R in the region of a focal spot.
  • a diaphragm 4 is arranged, which diffuses a peripheral part of the incident primary electron beam E, so that the extent of the focal spot on the target 3 is reduced
  • at least one edge region B of the aperture 4 surrounding an aperture 5 is made of a material suitable for scattering electrons of the generated kinetic energy.
  • the edge region B of the aperture 4 has a material thickness in the propagation direction P of the electron beam E that is small compared to the range of the electrons of the generated kinetic energy in the material of the edge region B.
  • the material thickness of the edge region B according to the invention is less than 10% of the average range of electrons with the kinetic energy of at least 1 MeV in the material of the edge region B.
  • the electrons propagating away from the center of the electron beam E are diffusely scattered by the edge region B and thus distributed over a large area of the inner surface of a vacuum housing 6 of the X-ray device 1. Accordingly, the heat input caused by the absorption of these electrons is also distributed over large areas of the vacuum housing 6, so that external cooling of the vacuum housing 6 is unnecessary.
  • a shield 7 is arranged, which in the exemplary embodiment consists of lead and extends - with the exception of the area of the target 3 - over the entire outer surface of the vacuum housing 6.
  • radioscopy is a suitable field of application for the X-ray device 1; other fields of application include, for example, medical radiotherapy.
  • the aperture 4 is formed from a simple sheet or foil made of metal. Since the interaction of the electrons with the material of aperture 4 is essentially limited to inelastic and elastic scattering events, the heat input is also minimal. Cooling of aperture 4 is therefore not absolutely necessary.
  • a cooling device 8 for fluid cooling of the aperture 4 is provided, which is shown schematically in Figure 1 is shown.
  • the aperture 4 is designed such that a cooling fluid, for example water, can be passed through at least a portion of the aperture.
  • the aperture 4 is formed by two plane-parallel foils, between which a gap is formed into which the cooling fluid can be introduced.
  • the proportion of X-ray radiation R caused by scattered electrons can be further reduced if the X-ray radiation R emitted from the target 3 is collimated.
  • a collimator 9 for example a multi-leaf collimator, is optionally arranged in the region of the emitted X-ray radiation R close to the target.
  • Figure 2 shows an X-ray device 1 according to a second embodiment.
  • the second embodiment differs from the one shown in Figure 1 illustrated embodiment only with regard to the extent of the shield 7, so that reference is first made to the relevant description in order to avoid repetition.
  • the shielding 7 is limited to a partial area of the vacuum housing 6.
  • the design of the shielding 7 is such that at least the predominant portion of the electrons scattered in the edge area B are absorbed by the shielding 7.
  • a solid angle range ⁇ (indicated by dashed lines in the figure) emanating from the scattering edge area B must be shielded, into which on average at least the predominant A majority of electrons are scattered.
  • the extent of the shield 7 is therefore to be designed as a function of the kinetic energy of the electrons in accordance with the mean scattering angle ⁇ and the mean deviation from this mean scattering angle ⁇ .
  • the information relevant for the design of shield 7 is in Figure 3 for a selected scattering material and for specific energy ranges between 2 MeV and 18 MeV. Shown are the mean scattering angle ⁇ , which is relevant for electron scattering at the respective energy, and the mean deviation ⁇ from it, which is represented as bars centered around the mean scattering angle ⁇ .
  • the mean deviation ⁇ corresponds to the standard deviation, so that in the example illustrated here, assuming normally distributed scattering events, it can be assumed that approximately 68% of the scattering angles are scattered within the mean scattering angle range defined by the mean scattering angle ⁇ and the mean deviation ⁇ .
  • the solid angle range ⁇ covered by the shield 7 corresponds to the sum of the mean scattering angle ranges whose scattering centers lie in the edge region B of the aperture 4, which is crucial for electron scattering.
  • the dimensions of the shield 7 can be significantly reduced by this design.
  • a preferred method for producing the above-described X-ray device 1 comprises a method step in which a component, which in the final assembled state forms the aperture 4, is introduced into the beam path of the electron beam E provided by the linear accelerator 2.
  • the aperture 5 is burned into the component by means of the electron beam E.
  • an electron beam current provided by the linear accelerator 2 can be increased compared to the current generated during regular operation. Since the number of electrons is greatly increased in a central region of the electron beam E due to the focusing properties of the linear accelerator 2 and greatly decreases towards the edges, such a procedure leaves an edge region B surrounding the aperture 5 with the scattering properties described above. Edge beam regions of the electron beam E, in which the number of electrons is greatly reduced compared to the central region of the electron beam E, are thus scattered away from the target 3 during regular operation of the X-ray device 1, thus minimizing the extent of the focal spot on the target 3.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Radiation-Therapy Devices (AREA)
  • X-Ray Techniques (AREA)
  • Particle Accelerators (AREA)

Claims (13)

  1. Dispositif (1) à rayons X de production de rayonnement X à haute énergie, comprenant un accélérateur (2) linéaire et une cible (3), dans lequel l'accélérateur (2) linéaire de production de rayonnement X (R) est constitué pour produire, dirigé sur la cible (3), un faisceau (E) d'électrons dont l'énergie cinétique par électron est d'au moins 1 MeV, caractérisé par un diaphragme (4), qui est disposé dans le trajet du faisceau (E) d'électrons entre l'accélérateur (2) linéaire et la cible (3) et qui a, entourant l'ouverture (5) du diaphragme, une partie (B) de bord, dont l'épaisseur de matériau, dans la direction (P) de propagation du faisceau (E) d'électrons, dénommé également dans ce qui suit primaire, représente moins de 10 % du parcours moyen d'électrons de l'énergie cinétique produite dans le matériau de la partie (B) de bord, dans lequel la partie (B) de bord du diaphragme (4) forme une corps de dispersion pour la limitation de l'étendue du foyer de gaine sur la cible (3) et dans lequel le diaphragme (4) disperse de manière diffuse une partie périphérique du faisceau (E) d'électrons primaire incident.
  2. Dispositif (1) à rayons X suivant la revendication 1, caractérisé en ce qu'au moins la partie (B) de bord du diaphragme (4) est en graphite.
  3. Dispositif (1) à rayons X suivant la revendication 1 ou 2, caractérisé en ce qu'au moins la partie (B) de bord du diaphragme (4) est formé d'au moins une feuille.
  4. Dispositif (1) à rayons X suivant la revendication 3, caractérisé en ce que la feuille est en métal.
  5. Dispositif (1) à rayons X suivant la revendication 4, caractérisé en ce que la feuille est au moins en partie en titane, en acier fin ou en cuivre, ou est revêtu de titane, d'acier fin ou de cuivre.
  6. Dispositif (1) à rayons X suivant l'une des revendications précédentes, caractérisé en ce que le diaphragme (4) peut être refroidi au moyen d'un dispositif de refroidissement, en particulier au moyen d'un dispositif de refroidissement par de l'eau.
  7. Dispositif (1) à rayons X suivant l'une des revendications précédentes, caractérisé en ce qu'un collimateur (9) est monté dans le trajet des faisceaux (R) de rayons X produits par l'impact sur la cible (3).
  8. Dispositif (1) à rayons X suivant l'une des revendications précédentes, caractérisé par une enveloppe (6) sous vide, entourant au moins l'accélérateur (2) linéaire, le diaphragme (4) et la cible (3) et pourvue au moins par endroits d'un blindage (7), qui est propre à absorber du rayonnement X provoqué par freinage d'électrons dispersés.
  9. Dispositif (1) à rayons X suivant la revendication 8, caractérisé en ce que les parties pourvues du blindage (7) ont, par rapport à des parties de l'enveloppe (6) sous vide sans blindage, une absorption plus grande du rayonnement X.
  10. Dispositif (1) à rayons X suivant la revendication 8 ou 9, car en ce que les parties pourvues du blindage (7) se trouvent exclusivement à l'intérieur d'une partie (Ω) d'angle solide partant du diaphragme (4) et s'étendant dans la direction (P) de propagation du faisceau (E) d'électrons.
  11. Dispositif (1) à rayons X suivant la revendication 10, caractérisé en ce que la partie (Ω) d'angle solide correspond à une partie angulaire moyenne de dispersion des électrons dispersés dans la partie (R) de bord du diaphragme (4).
  12. Dispositif (1) à rayons X suivant l'une des revendications précédentes, caractérisé en ce que l'énergie cinétique par électrons dans le faisceau (E) d'électrons produit est inférieure à 20 MeV.
  13. Procédé de fabrication d'un dispositif (1) à rayons X de production de rayonnement X (R) à haute énergie, comprenant un accélérateur (2) linéaire et une cible (3), dans lequel l'accélérateur (2) linéaire de production du rayonnement X (R) est constitué pour produire, dirigé sur la cible (3), un faisceau (E) d'électrons, dont l'énergie cinétique par électron est d'au moins 1 MeV, caractérisé en ce que l'on met, dans le trajet du faisceau (E) d'électrons entre l'accélérateur (2) linéaire et la cible (3), une pièce, dont l'épaisseur de matériau, dans la direction (P) de propagation du faisceau (E) d'électrons, représente moins de 10 % du parcours moyen d'électrons de l'énergie cinétique produite dans le matériau de la pièce, dans lequel on ménage, dans la pièce, une ouverture (5) de diaphragme, en soumettant la pièce à un faisceau (E) d'électrons produit par l'accélérateur (2) linéaire.
EP17165888.3A 2017-04-11 2017-04-11 Équipement à rayons x destiné à la production de rayons x à haute énergie Active EP3389055B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17165888.3A EP3389055B1 (fr) 2017-04-11 2017-04-11 Équipement à rayons x destiné à la production de rayons x à haute énergie
US15/947,934 US10825639B2 (en) 2017-04-11 2018-04-09 X ray device for creation of high-energy x ray radiation
CN201810316877.XA CN108696977B (zh) 2017-04-11 2018-04-10 用于产生高能量x射线辐射的x射线设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17165888.3A EP3389055B1 (fr) 2017-04-11 2017-04-11 Équipement à rayons x destiné à la production de rayons x à haute énergie

Publications (2)

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EP3389055A1 EP3389055A1 (fr) 2018-10-17
EP3389055B1 true EP3389055B1 (fr) 2025-09-24

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US (1) US10825639B2 (fr)
EP (1) EP3389055B1 (fr)
CN (1) CN108696977B (fr)

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Publication number Priority date Publication date Assignee Title
CN119846689A (zh) * 2025-01-07 2025-04-18 西北核技术研究所 一种测量伽马射线能量-时间联合谱的磁谱仪及实现方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB645509A (en) * 1948-09-08 1950-11-01 Standard Telephones Cables Ltd Improvements in or relating to electromagnetic wave guides

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Publication number Priority date Publication date Assignee Title
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US20180294134A1 (en) 2018-10-11

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