System for irradiating a target material
阅读说明:本技术 用于辐照靶材料的系统 (System for irradiating a target material ) 是由 约瑟夫·科莫尔 J-M·吉茨 贝努瓦·纳克特加尔 于 2019-07-02 设计创作,主要内容包括:用于在输送系统中在靶辐照站与收集站、比如热室之间转移靶材料(2)的囊体,包括:-束线通道(4),用于使辐照所述靶材料(2)的能量束通过,-靶保持器(1),用于保持所述靶材料(2)或背衬所述靶材料(2)的基材,-壳体(3),用于包封所述靶保持器(1),所述壳体是可打开的,使得当所述壳体(3)被打开时,所述靶材料(2)能够插入所述靶保持器(1)或从所述靶保持器移除,-降能箔(5a,5b,5c),所述降能箔横跨所述束线通道(4)定位,-至少一个靶冷却入口(14)和至少一个靶冷却出口(15),-至少一个降能箔冷却入口(20)和至少一个降能箔冷却出口(21)。(Capsule for transferring target material (2) between a target irradiation station and a collection station, such as a hot cell, in a delivery system, comprising: -a beamline channel (4) for passing an energy beam irradiating the target material (2), -a target holder (1) for holding the target material (2) or a substrate backing the target material (2), -a housing (3) for enclosing the target holder (1), the housing being openable such that the target material (2) can be inserted into or removed from the target holder (1) when the housing (3) is opened, -a reduced energy foil (5a, 5b, 5c) positioned across the beamline channel (4), -at least one target cooling inlet (14) and at least one target cooling outlet (15), -at least one reduced energy foil cooling inlet (20) and at least one reduced energy foil cooling outlet (21).)
1. Capsule for transferring target material (2) between a target irradiation station and a collection station, such as a hot cell, in a delivery system, comprising:
-a beam line channel (4) extending along a beam line channel axis X1 for passing an energy beam irradiating the target material (2),
-a target holder (1) for holding the target material (2) or a substrate backing the target material (2) at a grazing angle with respect to the beamline channel axis X1,
-a housing (3) for enclosing the target holder (1), the housing being openable such that the target material (2) can be inserted into or removed from the target holder (1) when the housing (3) is opened,
-a de-energizing foil (5a, 5b, 5c) positioned across the beam line channel (4) for de-energizing the energy beam upstream of the target material (2),
-at least one target cooling inlet (14) and at least one target cooling outlet (15) for passing a cooling fluid in a target cooling conduit (6) near the target holder such that the target material (2) can be cooled during irradiation,
-at least one reduced energy foil cooling inlet (20) and at least one reduced energy foil cooling outlet (21) for passing a cooling gas in the vicinity of the reduced energy foils (5a, 5b, 5 c).
2. The capsule according to claim 1, wherein said glancing angle is between 10 ° and 90 °.
3. Capsule according to claim 1 or 2, wherein it has a shape defined by a geometry of rotation about the beamline channel axis X1, comprising a front end (12) and a rear end (13), the beamline channel (4) extending within the capsule from the front end (12) to the target holder (1).
4. The capsule according to claim 3, wherein said target cooling inlet (14) is located in said rear end (13) of said capsule, said target cooling inlet being aligned with said beam line channel axis X1.
5. The capsule according to claim 3 or 4, wherein said target cooling outlet (15) is located in said rear end (13) of said capsule, said target cooling outlet (15) being an annular cooling outlet located around said beam line channel axis X1.
6. Capsule according to any of the preceding claims, wherein said housing comprises a closing cover (7), wherein,
-said closing cover (7) is coaxially fastenable to said casing (3) with respect to said harness axis X1 to form said rear end (13) of said capsule,
-the target holder (1) is rigidly coupled to the closing cover (7) such that the target holder (1) is inserted into the housing (3) when the closing cover (7) is fastened to the housing (3).
7. Capsule according to any of the preceding claims, wherein the target cooling conduit (6) is configured such that the cooling fluid can be in thermal contact with the target material (2) held in the target holder (2) or a substrate backing the target material.
8. A system for irradiating target material in a target irradiation station (10) and transferring irradiated target material between the target irradiation station (10) and a collection facility, such as a hot chamber (9), comprising:
-at least one capsule according to any one of claims 1 to 7,
-a receiving station (8) located in the collection facility (9),
a target irradiation station (10) for receiving an energy beam from a beam line along a beam line axis,
a delivery system (11) comprising a transfer tube (12) for delivering the capsules between the receiving station (8) and the target irradiation station (10),
wherein the content of the first and second substances,
-the transport system (11) comprises a first terminal (16) located in the target irradiation station (10),
the target irradiation station (10) comprises an irradiation unit (17) for irradiating the target material (2),
-the irradiation station comprises a first actuator (34) for transferring the capsule between the first terminal (16) and the irradiation unit (17) and a second actuator (18) for locking the capsule in an irradiation position,
-the target irradiation station (10) comprises a collimator (19) for narrowing the energy beam from the beam line,
-said at least one capsule being lockable in an irradiation position by said second actuator (18) in said irradiation unit (17), wherein said beam line channel axis X1 of said capsule is aligned with and connected to said beam line,
-the target irradiation station (10) comprises at least one target cooling inlet conduit and at least one target cooling outlet conduit in fluid communication with the target cooling inlet (14) and target cooling outlet (15) of the capsule when the capsule is locked in its irradiation position,
-the target irradiation station (10) comprises at least one reduced energy foil cooling inlet conduit and at least one reduced energy foil cooling outlet conduit in fluid communication with the reduced energy foil cooling inlet (20) and the reduced energy foil cooling outlet (21) of the capsule when the capsule is locked in its irradiation position,
-said receiving station (8) being connected to said transfer duct (12) as a second terminal end of said conveying system (11), said receiving station (8) being openable so that said capsules can be extracted from said receiving station (8).
9. The system according to claim 8, wherein the transport system (11) is a pneumatic system.
10. System according to claim 9, wherein the transport system (11) is a vacuum pneumatic system.
11. System according to any of claims 8-10, wherein the receiving station (8) is connected to the transfer pipe (12) by means of a gate valve, so that the second terminal can act as an air lock between the conveying system (11) and the collection facility (9).
12. The system according to any one of claims 8 to 11, wherein the target cooling inlet conduit (22) and the target cooling outlet conduit (23) of the irradiation station (10), and the target cooling inlet (14) and the target cooling outlet (15) of the capsule are configured such that when the capsule is locked in the irradiation position, the target cooling inlet conduit (22) of the irradiation station (10) is in fluid communication with the target cooling inlet (14) of the capsule, and the target cooling outlet conduit (23) of the irradiation station (10) is in fluid communication with the target cooling outlet (15) of the capsule, regardless of the relative angular orientation between the capsule and the irradiation unit (17) with respect to the beamline channel axis X1.
13. The system of claim 12, wherein,
-the target cooling inlet (14) of the capsule is a circular inlet located in the rear end (13) of the capsule, the target cooling inlet (14) being aligned with the beam line channel axis X1,
-the target cooling outlet (15) of the capsule is located in the rear end (13) of the capsule, the target cooling outlet (15) being an annular cooling outlet located around the beam line channel axis X1,
-the target cooling inlet conduit (22) of the irradiation station (10) has an end on the beam line axis with a circular shape with a radius matching the radius of the target cooling inlet (14) of the capsule,
-the target cooling outlet conduit of the irradiation station (10) has an end on the beam line axis with an annular outlet with a radius matching the radius of the target cooling outlet (15) of the capsule.
14. The system according to any one of claims 8 to 13, wherein the energy-reducing foil cooling inlet conduit (24) and the energy-reducing foil cooling outlet conduit (25) of the irradiation station (10) and the energy-reducing foil cooling inlet (20) and the energy-reducing foil cooling outlet (21) of the capsule are configured such that when the capsule is locked in the irradiation position, the reduced energy foil cooling inlet conduit (24) of the irradiation station (10) is in fluid communication with the reduced energy foil cooling inlet (20) of the capsule, and the at least one reduced energy foil cooling outlet conduit (25) of the irradiation station (10) is in fluid communication with the reduced energy foil cooling outlet (21) of the capsule, regardless of the relative angular orientation between the capsule and the irradiation unit (17) with respect to the beam line channel axis X1.
15. The system of any one of claims 8 to 14,
-the energy-reducing foil cooling inlet (20) of the capsule is an arc-shaped inlet with a radius R1 in the front end (12) of the capsule,
-the energy-reducing foil cooling outlet (21) of the capsule is an arc-shaped outlet located in the front end (12) of the capsule, the arc-shaped outlet having a radius R2 different from a radius R1,
-the energy-reducing foil cooling inlet conduit (24) of the irradiation station (10) has an end of a ring shape around the beam line axis, the ring shape having a radius matching the radius R1 of the arc-shaped inlet (20) of the capsule,
-the energy-reducing foil cooling outlet conduit (25) of the irradiation station (10) has an end of a ring shape around the beam line axis, the ring shape having a radius matching the radius R2 of the arc-shaped outlet (21) of the capsule.
Technical Field
The present invention relates to a system for transferring target material between a target irradiation station, in which target material is irradiated by an energy beam, for example a particle beam, and a collection facility, such as a hot chamber in a system for producing radionuclides, in which the irradiated target material is collected.
Background
Irradiation of target material by an energy beam is used in many modern applications. For example, for medical applications, radionuclides have long been produced by cyclotron irradiation of target material with medium or low energy (5-30 MeV) beams. Radionuclides have many important industrial and scientific uses, the most important of which are tracers: radiopharmaceuticals are synthesized by reaction with suitable non-radioactive precursors and, when administered in humans, allow for diagnostic and therapeutic monitoring by Positron Emission Tomography (PET), particularly in the treatment of tumors. Some radiopharmaceuticals may also have a therapeutic effect.
Document EP 1717819 discloses a system for the automatic production of radionuclides. In the disclosed system, a cylindrical target carrier or capsule is disclosed that includes a dividing wall defining two open cylindrical cavities. One of the cylindrical cavities is for receiving a target material to be irradiated. In the disclosed system, the capsule serves as a shuttle between an irradiation unit, in which the target material carried by the capsule is irradiated, and a hot chamber, in which electrodeposition and electrodissolution of the target material can take place due to the electrolytic cell. A pneumatic transfer system is arranged to transfer the capsules between the hot cell and the irradiation unit. There are also purification systems for purifying acid solutions containing radionuclides obtained from the electrodissolution step. In this system, the irradiation takes place in an irradiation unit, which receives a particle beam from a cyclotron. In case different radionuclides need to be produced or when target materials with different thicknesses are used in this system, the energy of the particle beam irradiating the target material needs to be changed. This can be done by using a more complex accelerator that can deliver beams with variable energy. When the accelerator can only deliver a particle beam of fixed energy, the energy of the beam irradiating the target material can still be changed by using a de-energizing foil positioned across the beam line in the irradiation unit. By switching between different energy reducing foils, the energy of the beam obtained from the fixed energy cyclotron can thus be adjusted in order to irradiate the target material at a suitable energy level. However, switching between different energy reducing foils is an inconvenient process involving a shutdown of the system with significant adverse economic impact and involving access to the irradiation station, resulting in radiation exposure for maintenance personnel.
Disclosure of Invention
It is an object of the present invention to provide a system for automated production of radionuclides with increased flexibility to vary the energy of a beam irradiating a target material.
The invention is defined in the appended independent claims. Preferred embodiments are defined in the dependent claims.
In particular, the present invention relates to a capsule for transferring target material between a target irradiation station and a collection station, such as a hot chamber, in a delivery system, said capsule comprising:
a beam line channel extending along a beam line channel axis X1 for passing an energy beam irradiating the target material,
-a target holder for holding the target material or a substrate backing the target material at a grazing angle relative to the beamline channel axis X1,
a housing for enclosing the target holder, the housing being openable such that the target material can be inserted into or removed from the target holder when the housing is opened,
-an energy reducing foil positioned across the beam line channel for reducing the energy of the energy beam upstream of the target material,
-at least one target cooling inlet and at least one target cooling outlet for passing a cooling fluid in a cooling conduit near the target holder such that the target material can be cooled during irradiation,
-at least one reduced energy foil cooling inlet and at least one reduced energy foil cooling outlet for passing a cooling gas in the vicinity of the reduced energy foil.
In an advantageous embodiment, the glancing angle is between 10 ° and 90 °.
In an advantageous embodiment, the capsule has a shape defined by a geometry of rotation about the beamline channel axis X1, the capsule comprising a front end and a rear end, the beamline channel extending within the capsule from the front end to the target holder.
In an advantageous embodiment, the target cooling inlet is located in the rear end of the capsule, said target cooling inlet being aligned with the beam line channel axis X1.
In an advantageous embodiment, the target cooling outlet is located in the rear end of the capsule, the target cooling outlet being an annular cooling outlet located about the beamline channel axis X1.
In an advantageous embodiment, the housing comprises a closing cover, wherein,
-the closing cover is coaxially fastenable to the housing with respect to the harness axis X1 to form the rear end of the capsule,
-the target holder is rigidly coupled to the closure lid such that the target holder is inserted into the housing when the closure lid is fastened to the housing.
In an advantageous embodiment, the target cooling conduit is configured such that a cooling fluid can be in thermal contact with a target material held in the target holder or a substrate backing the target material.
The invention also relates to a system for irradiating target material in a target irradiation station and transferring the irradiated target material between the target irradiation station and a collection facility, such as a hot chamber, the system comprising:
-at least one capsule as described above,
-a receiving station located in the collection facility,
a target irradiation station for receiving an energy beam from the beam line along a beam line axis,
a delivery system comprising a transfer tube for delivering the capsules between the receiving station and the target irradiation station,
wherein the content of the first and second substances,
-the transport system comprises a first terminal located in the target irradiation station,
the target irradiation station comprises an irradiation unit for irradiating the target material,
-the irradiation station comprises a first actuator for transferring the capsule between the first terminal and the irradiation unit and a second actuator for locking the capsule in an irradiation position,
-the target irradiation station comprises a collimator for narrowing the energy beam from the beam line,
said at least one capsule being lockable in an irradiation position by said second actuator in said irradiation unit, wherein a beam line channel axis X1 of said capsule is aligned with and connected to said beam line,
-the target irradiation station comprises at least one target cooling inlet conduit and at least one target cooling outlet conduit in fluid communication with the target cooling inlet and target cooling outlet of the capsule when the capsule is locked in its irradiation position,
-the target irradiation station comprises at least one energy-lowering foil cooling inlet conduit and at least one energy-lowering foil cooling outlet conduit, which are in fluid communication with the energy-lowering foil cooling inlet and outlet of the capsule when the capsule is locked in its irradiation position,
-said receiving station being connected to said transfer duct as a second terminal end of said conveying system, said receiving station being openable so that said capsules can be extracted from said receiving station.
In an advantageous embodiment, the transport system is a pneumatic system.
In an advantageous embodiment, the transport system is a vacuum pneumatic system.
In an advantageous embodiment, the receiving station is connected to the transfer pipe by a gate valve, so that the second terminal can act as a gas lock between the conveying system and the collection facility.
In an advantageous embodiment, the target cooling inlet and outlet conduits of the irradiation station, and the target cooling inlet and outlet of the bladder, are configured such that when the bladder is locked in the irradiation position, the target cooling inlet conduit of the irradiation station is in fluid communication with the target cooling inlet of the bladder, and the target cooling outlet conduit of the irradiation station is in fluid communication with the target cooling outlet of the bladder, regardless of the relative angular orientation between the bladder and the irradiation unit with respect to the beamline channel axis X1.
In an advantageous embodiment of the method according to the invention,
-the target cooling inlet of the capsule is a circular inlet located in the rear end of the capsule, aligned with the beam line channel axis X1,
-the target cooling outlet of the capsule is located in the rear end of the capsule, the target cooling outlet being an annular cooling outlet located around the beamline channel axis X1,
-the target cooling inlet conduit of the irradiation station has an end on the beam line axis having a circular shape with a radius matching the radius of the target cooling inlet of the capsule,
-the target cooling outlet conduit of the irradiation station has an end on the beam line axis with an annular outlet of radius matching that of the target cooling outlet of the capsule.
In an advantageous embodiment, the reduced-energy foil cooling inlet and outlet conduits of the irradiation station, and the reduced-energy foil cooling inlet and outlet of the capsule are configured such that when the capsule is locked in the irradiation position, the reduced-energy foil cooling inlet conduit of the irradiation station is in fluid communication with the reduced-energy foil cooling inlet of the capsule, and the at least one reduced-energy foil cooling outlet conduit of the irradiation station is in fluid communication with the reduced-energy foil cooling outlet of the capsule, regardless of the relative angular orientation between the capsule and the irradiation unit with respect to the beam line channel axis X1.
In an advantageous embodiment of the method according to the invention,
-the energy-reducing foil cooling inlet of the capsule is an arc-shaped inlet with a radius R1 in the front end of the capsule,
-the energy-reducing foil cooling outlet of the capsule is an arc-shaped outlet located in the front end of the capsule, the arc-shaped outlet having a radius R2 different from radius R1,
-the energy-reducing foil cooling inlet conduit of the irradiation station has an end of a ring shape around the beam line axis, the ring shape having a radius matching the radius R1 of the arc-shaped inlet of the capsule,
-the reduced energy foil cooling outlet conduit of the irradiation station has an end of a toroidal shape around the beamline axis, the toroidal shape having a radius matching the radius R2 of the arcuate outlet of the capsule.
Drawings
These and further aspects of the invention will be explained in more detail, by way of example, with reference to the accompanying drawings, in which:
figure 1 shows a capsule for a system according to the invention;
figure 2 is an enlarged cross-sectional view of the capsule according to figure 1;
FIG. 3 is a schematic diagram of a system according to the present invention;
FIG. 4 shows an irradiation station of a system according to the present invention;
figure 5 shows a cross-sectional view of the irradiation station according to figure 4, with the capsule locked in its irradiation position;
figure 6 is a detailed view of a part of the system according to the invention connected to the beam line of the energy beam generator.
The figures are not drawn to scale.
Detailed Description
Fig. 1 and 2 show an example of a capsule for transferring
The capsule includes:
a beam line channel 4 extending along a beam line channel axis X1 for passing an energy beam irradiating the
-a
a
at least one
at least one
at least one reduced energy
The energy beam to be received in the capsule for irradiating the
In fig. 1 and 2, the
The
In fig. 1 and 2, the capsule has a tubular side wall defined by a rotation geometry about the beamline passage axis X1, and is closed by a
The
The at least one
The presence of the energy-reducing foil in the capsule according to the invention allows to reduce the ionizing radiation dose received by the operator during maintenance of the target irradiation station. It is well known that the energy reducing foils are activated to a large extent during operation of the target irradiation station, and therefore they are the strongest ionizing radiation sources induced in the target irradiation station in addition to the target and the substrate. Since the energy reducing foils are part of the capsules, they are removed from the target station after each irradiation together with the irradiated target, so the only active parts remaining near the target station are the collimator and beam stop along the beam line.
The
The at least one
The energy beam received by the capsule will also generate heating of the
In the capsule shown in fig. 1 and 2, the
The presence of the
As shown in fig. 3, the invention also relates to a system for irradiating target material in a
-at least one capsule as described above,
a receiving
a
a
wherein the content of the first and second substances,
the
the
the
the
said at least one capsule can be locked in irradiation position by the
the
the
the receiving
In the system shown in fig. 3, the
The operating principle of the conveying system is as follows:
when a capsule needs to be transferred from the collection facility 9 to the
When a capsule needs to be transferred from the
As shown in fig. 3, the system may comprise two
An example of an
As shown in fig. 4 and 5, the
the harness passage axis X1 is aligned with and connected to the harness,
the target cooling
the reduced energy foil cooling
In an advantageous embodiment of the system, the target cooling
In the capsule shown in fig. 1 and 2, in which the
In an advantageous embodiment of the system, the reduced-energy foil cooling
In the capsule shown in fig. 1 and 2, in which the reduced-energy
Fig. 6 shows a detailed view of a part of the system according to the invention of a
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