• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Stop device for radiation beams, comprising: a stop (8) for blocking radiation beams and a driving device associated with the stop (8) to change the position of the stop (8). The driving device comprises a first circular element (1) defining a circumference (c), a second element (4) movable along said circumference (c) and which can turn in turn around a perpendicular axis (X) ') with respect to the plane defined by the circumference (c) and a support (7) joining the second element (4) to the stop (8), so that the displacement of the second element (4) along said circumference (c) and/or the rotation of said second element (4) allow the stop (8) to be arranged in different positions. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2599628A1
    申请号:ES201631058
    申请日:2016-08-01
    公开日:2017-02-02
    发明作者:Carles COLLDELRAM PEROLIU；Joaquin BENCHOMO GONZALEZ FERNANDEZ
    申请人:Consorci per a la Construccio Equipament i Explotacio del Laboratori de Llum Sincrotro；
    IPC主号:
    专利说明:

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    DESCRIPTION
    Stop device for radiation beams.
    Object of the invention.
    The present invention relates to a stop device for radiation beams.
    Background of the invention.
    In experiments in which a radiation source is used that emits a radiation (X-rays, neutrons, electrons) that hits a sample of any type, and when an area detector is used to control and measure the electromagnetic radiation resulting from said interaction, a beam stop (beam stop) is used to stop or attenuate the intense primary beam of radiation that has not been dispersed by the sample. If this beam is not stopped, the detector could be damaged by that beam. Normally, the beam stop is totally impenetrable to this energy beam or it can be semi-transparent.
    This beam stop can be confined in a vacuum environment that minimizes the presence of air between the sample and the detector. In some experiments, the beam stop must be placed in different regions of the active area of the detector to block beams in different positions, so it is necessary to use beam stops with means that allow them to move through the detector area.
    The solutions used in the state of the art to place a beam stop at different positions of the detector surface consist of a rod that supports the beam stop and which is in turn supported by a drive mechanism that displaces the rod and , therefore, the stop, in a parallel plane with respect to the surface of the detector. The rod only moves in translation, so that its orientation within the plane of motion does not change. For example, if the rod is arranged in a vertical orientation, it will always be in a vertical orientation regardless of the position of the stop.
    The rod casts a shadow on the detector, that is, the rod blocks to a greater or lesser extent a part of the radiation that would otherwise impact it unhindered in the area of the detector shaded by the rod. This avoids obtaining radiation information in this shaded area.
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    In the described solutions of the state of the art, each time the stop is placed in a certain position on the detector, the rod is always arranged in the same position, since, as described above, its position only changes in translation and its orientation is the same in all positions. Therefore, the drawback of these solutions is that the rod will always cast shadow on the same area of the detector for the same position of the beam stop.
    Description of the invention
    The objective of the present invention is to solve the drawbacks of the devices known in the art, by providing a stop device for radiation beams comprising a stop to block radiation beams and a drive device associated with the stop to change the position of the stop, characterized by the fact that the drive device comprises a first circular element defining a circumference, a second element movable along said circumference and which can turn in turn around a perpendicular axis with respect to the plane defined by the circumference and a support that joins the second element to the stop, so that the displacement of the second element along said circumference and / or the rotation of said second element allows the stop to be arranged in different positions.
    Preferably, the support is a rod attached by one free end to the second element and connected by the other free end to the stop.
    Thanks to these characteristics, it is possible to place the beam stop in the desired position using two turning movements (the circular movement of the second element along the circumference of the first element and the rotation movement of the second element itself). This means that the stop can be placed in the same position with the second element placed in two different positions. That is, the support (the rod) that joins the stop to the second element may be arranged in two different positions for the same position of the stop. This will allow two identical tests with the stop in the same position but with the support (rod) in a different position, so that it will be possible to compensate for the effects of the shadow cast by the support (rod) on the detector in both tests.
    According to an embodiment of the invention, the first circular element is a ring that rotates about a perpendicular axis with respect to the plane defined by the circumference of the ring and that passes through the center of said circumference.
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    Advantageously, the ring comprises a crown with an outer teeth and a hollow central part.
    Preferably, the device according to the invention comprises an engine and a transmission associated with said engine and said crown.
    According to an embodiment of the invention, the second element is fixedly attached to the first element.
    Advantageously, the second element comprises a base fixedly attached to the first element and a rotating mechanism associated with said base and associated with the support.
    Preferably, the rotating mechanism comprises a piezoelectric type motor.
    In addition to the advantages described above related to the arrangement of the support (rod) in different positions for the same position of the stop, the present invention also allows to obtain a more compact device than the state of the art devices, which use linear drive devices , which take up more space, and the length of the stop support rod could also be shorter than in said known devices, increasing the stability of the stop support.
    Description of the drawings.
    In order to facilitate the description of how much has been described above, some drawings are attached in which, schematically and only by way of non-limiting example, a practical case of realization of the device of the invention is represented, in which:
    Figure 1 is a perspective view of the radiation beam stop device of the present invention;
    Figures 2 and 3 are two front views of the stop device for radiation beams shown in Figure 1;
    Figures 4a and 4b show two front views of two possible ways of placing the beam stop in the same position with the device of the present invention;
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    Figures 5a and 5b show two additional front views of two possible ways of placing the beam stop in another position with the device of the present invention.
    Description of a preferred embodiment.
    Referring to Figures 1 to 3, in said figures a general view of the stop device for radiation beams according to the invention is shown.
    The device comprises a crown 1 that defines a circumference C and that has a tooth on its outer surface (not visible in the figures) and that defines an empty circular central space A. The crown 1 is supported by bearings (not visible) on the wall of a vacuum chamber 2. The bearings allow the rotation of the crown 1 around a perpendicular X axis with respect to the plane in which the circumference C defined by said crown 1 and passing through the center thereof is comprised.
    The crown 1 is actuated to rotate as described by a drive mechanism which, in this embodiment, comprises an endless screw 3 associated with a motor (not visible, located to the left of the endless screw 3 in the figures, and preferably a stepper type electric motor). The worm 3 meshes with the outer teeth of the crown 1, so that the rotation of the worm 3 through the motor in one direction or in the opposite direction will rotate the crown 1 in one direction or another (see arrows in Figure 3).
    An element 4 is attached to the crown 1 in a position corresponding to the circumference C, on one of its lateral faces. The element 4 comprises a base 5 attached to the crown, for example, by means of screws, and an electric motor 6 connected to said base 5. The electric motor 6 is preferably of the piezoelectric type and allows to obtain a rotational movement of exit about an axis X 'parallel with respect to the X axis (see arrows in figure 3).
    A rod 7 is connected by one of its free ends to the outlet end of the motor 6, in an orientation such that it is disposed within a parallel plane with respect to the plane defined by the circumference C defined by the crown 1, perpendicularly with with respect to the X 'axis of rotation of the motor 6. That is, when the motor 6 rotates, the rod 7 will rotate around the X' axis of rotation of the motor 6.
    The rod 7 is connected by its other free end to a stop 8 for radiation beams. The stop 8 is an element known in the art and can consist of a cylindrical block made of a material
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    opaque to the radiation beams.
    As explained below, the described configuration allows the stop 8 to be placed in any position within the central space A in two different ways, so that the rod 7 can occupy two different positions for the same position of the stop 8.
    In Figure 4a a first example can be observed in which the stop 8 is located in a first position within the central space A. To obtain this first position of the stop 8, the crown 1 is rotated until the element 4 is arranged forming an angle a with respect to the central horizontal axis of the central space A, and the motor 6 is rotated until the rod 7 is arranged forming an angle p with respect to the angle a.
    In Figure 4b it can be seen that the stop 8 is located in the same position as in Fig. 4a, but the rod 7 is arranged in a different position. To obtain this arrangement, the crown 1 is rotated until the element 4 is arranged at an angle w with respect to the same central horizontal axis (w = at + 180 °) and the motor 6 is rotated until the rod 7 is arranged at an angle p with respect to angle w.
    In figure 5a a second example is shown in which the stop 8 is located in a second position within the central space A. To obtain this second position of the stop, the crown 1 is rotated until the element 4 is arranged forming an angle to with respect to the central horizontal axis of the central space A, and the motor 6 is rotated until the rod 7 is arranged forming an angle p with respect to the angle a.
    In Figure 5b, the stop 8 is located in the same position as in Figure 5a, but the rod 7 is arranged in a different position. To obtain this arrangement, the crown 1 is rotated until the element 4 is arranged at an angle w with respect to the same central horizontal axis (w = at + 90 °) and the motor 6 is rotated until the rod 7 is arranged at an angle p with respect to angle w.
    As it has been observed in the examples shown, the device of the present invention allows the stop 8 to be placed in any position within the central space A in two alternative ways in which the rod 7 is arranged in a corresponding different position.
    Obviously, the entire placement process of the stop 8 can be carried out automatically, using position detectors and electronic means that allow the stop 8 to be arranged in the two
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    alternative positions
    In use, the device of the invention is arranged in front of the surface of a detector of an electromagnetic radiation measuring device, such as a diffractometer. In the figures, the surface of the detector, not shown, would be arranged behind the device, would be essentially parallel with respect to the plane in which the circumference C defined by the crown 1 is comprised and would be comprised within the central space A, seen in the direction of the X axis.
    As explained above, in these measuring devices, radiation is caused to influence a sample to measure the electromagnetic radiation resulting from this interaction. Part of this resulting radiation comprises an intense primary beam of radiation that has not been dispersed throughout the sample and which, if not stopped, could damage the detector. Depending on the experiment performed, this beam may vary and will affect different positions of the detector.
    The function of the stop 8 is to stop or attenuate this beam to prevent it from damaging the detector. For this reason, the stop 8 is made of an impenetrable or partially impenetrable material at this radiation and is disposed between the analyzed sample and the measuring device detector.
    Because the primary beam that needs to be blocked is different and has a different impact on the detector depending on the experiment performed, the stop 8 must be able to change its position in order to block each corresponding beam.
    In a test of a sample, the measuring device detector measures the radiation resulting from the beam that has affected the sample. The rod 7 that supports the stop 8 covers part of the surface of the detector, so that the surface of the detector covered by the rod 7 does not collect any information. Thanks to the device of the invention, it is possible to perform two tests on the same sample with the stop 8 in the same position but with the rod 7 in a corresponding different position (for example, a first test with the configuration shown in Figure 4a and a second test with the configuration shown in figure 4b, or also referring to figures 5a and 5b).
    In this way, by collecting the information of the two tests, it will be possible to compensate for the information not collected by the detector in the shadow zone of the rod 7 in each of the two positions.
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    As explained previously, in the prior art this was not possible, since the rod always occupied the same position in a corresponding position of the stop.
    Thanks to the rotating movement of the element 4 along the circumference C of the crown 1 and the rotating movement of the motor 6, it is possible to make a rod 7 with a length approximately equivalent to the radius of the central space A of the crown 1. This length it is smaller than that of the prior art rods, with which it was necessary to cover the same area of movement of the stop without the possibility of combining two turning movements. This allows the stop 8 to be supported more rigidly.
    In addition, the configuration of the device of the invention allows to obtain a very compact unit that occupies a minimum space, which is of great importance, since the device of the invention will function normally in high vacuum and ultra high vacuum environments, in which The available space is very small.
    The device of the invention does not require the use of insulating bellows to work in a vacuum. The movements of the device do not require the use of said bellows to transmit linear movements from the outside to the interior of a vacuum environment in which the device is located, since there are only rotation movements and relative movements between the components of the device in the empty environment.
    The device of the invention may comprise known components and materials, such as stainless steel and aluminum, designed to work in vacuum environments (high vacuum or ultra high vacuum).
    The size of the device will depend on the size of the detector with which it is used, since the detector should be located within the central space A of the device.
    Although a preferred embodiment of the stop device for radiation beams of the invention has been described herein, said device could have other configurations within the scope of the invention defined in the claims.
    For example, it would be possible to replace the crown 1 with a fixed circular glutton that defines an analogous circumference to the circumference C defined by the crown 1. In this case, the element 4, which in the preferred embodiment described above is a fixed element with respect to to the crown 1 that travels along said circumference C by turning the crown 1, it could comprise
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    a sliding slide along said fixed circular glide by means of suitable drive means and in which the motor 6 would be mounted. This embodiment would allow it to obtain the same results as the preferred embodiment described in the figures.
    权利要求:
    Claims (8)
    [1]
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    1. Stop device for radiation beams comprising a stop (8) for blocking radiation beams and a drive device associated with the stop (8) to change the position of the stop (8), characterized by the fact that the device The actuator comprises a first circular element (1) defining a circumference (C), a second element (4) movable along said circumference (C) and which can turn in turn around a perpendicular axis (X ') with respect to the plane defined by the circumference (C) and a support (7) that joins the second element (4) to the stop (8), so that the displacement of the second element (4) along said circumference (C ) and / or the rotation of said second element (4) allow the stop (8) to be arranged in different positions.
    [2]
    2. Device according to claim 1, characterized in that the support is a rod (7) connected by a free end to the second element (4) and connected by the other free end to the stop (8).
    [3]
    Device according to any one of the preceding claims, characterized in that the first circular element is a ring (1) that rotates around an axis (X) perpendicular with respect to the plane defined by the circumference (C) of the ring ( 1) and passing through the center of said circumference (C).
    [4]
    Device according to claim 3, characterized in that the ring comprises a crown (1) with an external teeth and a hollow central part (A).
    [5]
    5. Device according to claim 4, characterized in that it comprises an engine and a transmission (3) associated with said engine and said crown (1).
    [6]
    6. Device according to claim 1, characterized in that the second element (4) is fixedly connected to the first element (1).
    [7]
    7. Device according to claim 6, characterized in that the second element (4) comprises a base (5) fixedly attached to the first element (1) and a rotating mechanism (6) associated with said base (5) and associated with the support (7).
    [8]
    8. Device according to claim 7, characterized in that the rotating mechanism comprises a piezoelectric motor (6).
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    同族专利:
    公开号 | 公开日
    ES2599628B1|2017-09-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US7295650B2|2003-04-17|2007-11-13|Bruker Axs Gmbh|Method for operating a primary beam stop|DE102019208834B3|2019-06-18|2020-10-01|Bruker Axs Gmbh|Device for adjusting and changing beam catchers|
    法律状态:
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    ES201631058A|ES2599628B1|2016-08-01|2016-08-01|BUMPER DEVICE FOR RADIATION BEAMS|ES201631058A| ES2599628B1|2016-08-01|2016-08-01|BUMPER DEVICE FOR RADIATION BEAMS|
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