KR101316794B1 - Neutron focusing apparatus for ultra sammall angle neutron scattering - Google Patents

Abstract

PURPOSE: A neutron collecting device of an ultra small neutron scattering apparatus is provided to prevent damage by limiting the movement range of a focusing plate when the curvature of a curved reflection surface is controlled. CONSTITUTION: A focusing plate (320) includes a plurality of unit focusing plates. A driving module controls the curvature of a curved reflection surface. A motor (360) provides a driving force to the driving module. A direction change power transmitting unit includes a direction change gear part (380). The direction change power transmitting unit transmits the rotary power of the motor to the driving module.

Description

Neutron focusing device of ultra-small neutron scattering device {NEUTRON FOCUSING APPARATUS FOR ULTRA SAMMALL ANGLE NEUTRON SCATTERING}

The present invention relates to a neutron focusing device of an ultra-small neutron scattering device, and more particularly, to a neutron focusing device of an ultra-small neutron scattering device that collects neutron beams and focuses on a target at an arbitrary position in a micro-angle neutron scattering device. will be.

The ultra-small neutron scattering device is a device for non-destructive measurement of the structure of a material having a size from submicron to micron using neutrons. Structures of 1 nm or less, such as the lattice structure of the crystal, can be measured using an X-ray or neutron diffractometer, and structures of 1.0 nm to 100 nm can be measured using an X-ray incinerator or neutron incinerator. . The Bonse-Hart type channel cut perfect double crystal deffractometer can measure a structure of approximately 0.1 μm to 4 μm using an X-ray apparatus. The application of the concept of Bonse-Hart (BH) type double-single-crystal diffraction to neutrons has been limited in its use due to high noise, but Agamalian has shown a significant reduction in noise.

Micro-neutral neutron scattering devices are widely used in various fields of science such as metals, ceramics, ores, polymers, biotechnology, carbonaceous materials, composites, magnetic materials, membranes, etc., and quantitatively or qualitatively measure the structure of materials, (Liquid, liquid, melt, critical fluid) can also be used to analyze the material structure. For example, in the field of making carbon nanotube composites, since uniformly dispersing expensive nanotubes is necessary to improve product uniformity, economy, and physical properties, an ultra-small neutron scattering device can be used to measure particle dispersion. have. In addition, when mixing two materials in the molten state or manufacturing a material composed of several elements, it is possible to measure the phase separation, so that the physical and chemical properties of the material can be tuned, thus improving the properties of the product. Can be.

1 illustrates a basic configuration of a neutron double single crystal diffractometer or a micro angle neutron scattering apparatus according to the prior art Bonse-Hart-Agamalian (hereinafter referred to as BHA). As shown in FIG. 1, the conventional ultra-small neutron scattering apparatus includes a premonochromator 10 for focusing by inducing an incident neutron N1 to a monochromator and bouncing the incident neutron beam three times. A pair of single crystal members (ie, a BHA monochromator) (20, Bonse-Hart-Agamalian monochromator) and a BHA analyzer (40, Bonse-Hart-Agamalian analyzer) and a pair of single crystal members are disposed between the neutron beam The sample 30 which scatters this, and the detector 50 which detects the neutron N2 which passed the BHA analyzer 40 among the single crystal members are comprised.

FIG. 2 illustrates BH single crystals such as conventional BH (Bonse-Hart) analyzers and BH monochromators, and FIG. 3 illustrates BHA single crystals such as conventional BHA analyzers and BHA monochromators. As shown in Figs. 2 and 3, the single crystal device is a concave-convex structure having a first wall surface 21 and a second wall surface 22, and a passage of a neutron beam is formed therebetween. It is a reflective structure. A slit 23 is formed in the central portion of the first wall surface 21 and blocks both wall surfaces of the slit 23 with a shield to prevent the neutron beam from penetrating into the wall surface. The first and second wall surfaces 21 and 22 mainly use silicon single crystals, and a neutron shielding material such as cadmium or gadolinium is used as the shielding agent of the slit 23.

Since the ultra-small neutron scattering device is provided with only the preceding monochromator 10, the BHA monochromator 20, the BHA analyzer 40 and the detector 50, the process of sequentially measuring the intensity of neutrons of various angles. The measurement time is long, and the devices are installed in the air, so that the absorption and scattering of neutrons by the air occurs, and the neutron flow rate reaching the sample 30 or the detector 50 may decrease or may cause an increase in noise. There was a problem.

In order to solve these problems, the present applicant can reduce analysis time by arranging multiple analyzers in a line with Korean Patent Application No. 10-2010-0080703, and a very small neutron device that can reduce noise by reflecting a neutron beam several times. It has been filed. Korean Patent Application No. 10-2010-0080703 is incorporated herein by reference.

Such micro angle neutron scattering devices include a preceding monochromator to direct the neutron beam to a specific target, ie a monochromator or a sample. The preceding monochromator is a stationary neutron focusing device for focusing neutrons to a specific target.

In general, neutrons have a smaller flux and smaller cohesion compared to Photon, resulting in relatively large spreads. However, neutrons have the advantage of being able to obtain large area beams despite these drawbacks. That is, since the flow rate is small but a large area beam can be obtained, when the neutron beam is focused on a specific target, the neutron flow rate at the target can be increased.

Known prior art monochromators use a reflective frame in a fixed type, which knows the distance to the target from the neutron focusing device and designs the reflecting surface to have a constant curvature equal to the calculated value so that the neutron is focused on the target.

However, such a known monochromator has a problem in that the reflection frame of the fixed neutron focusing apparatus needs to be reprocessed by recalculating the distance from the target when the distance from the target changes. In addition, there is a problem in that the reflection frame must be processed again when the focusing is not performed properly on the target due to the calculated value or the reflection surface processing error, that is, when the focusing does not reach the required level. However, since the inside of the microminiature neutron scattering device is sealed and the preceding monochromator is installed in the shielding bunker, accessibility to the preceding monochromator is bad, so it takes too much time to install the preceding monochromator and set the device. There is this.

The present invention has been made to solve the above problems, in the neutron focusing apparatus for reflecting neutrons in a specific wavelength range to focus the neutrons to a specific target, by adjusting the focus by adjusting the curvature of the reflective curved surface of the focusing plate It is an object of the present invention to provide a neutron focusing device of an ultra-small neutron scattering device capable of focusing a neutron and preventing damage caused by a malfunction or an operation error of a motor providing a driving force.

An object of the present invention is to provide a neutron focusing device of the ultra-small scattering device that can prevent the damage and damage of the device due to excessive movement is limited by the movement range of the focusing plate to form the reflective curved surface when adjusting the curvature of the reflective surface It is done.

It is an object of the present invention to provide a neutron focusing device of an ultra small angle scattering device that enables forward and reverse rotation of a rotating shaft for adjusting the curvature of a reflective curved surface by using one-way rotation of a motor.

The present invention to achieve the above object, the frame forming a border; It includes a plurality of unit focusing plate installed in the vertical direction, each of the unit focusing plate is extended in the horizontal direction while both ends are supported on the inner side of both sides of the frame, by the reflecting surface provided on the surface of the unit focusing plate A focusing plate on which a reflective curved surface curved in an up and down direction may be formed; A driving module configured to adjust the curvature of the reflective curved surface by rotating the unit focusing plate symmetrically with respect to each other based on a horizontal center line; A motor providing a driving force to the drive module; And an outer ring gear having an inner gear tooth formed in a part of an inner circumferential surface of the edge portion protruding in one direction along the circumference of the disc; An inner ring gear disposed at a central portion of one side surface of the outer ring gear and formed on a portion of an outer circumferential surface thereof and having an outer gear tooth formed at a length corresponding to the inner gear tooth at a position not facing the inner gear tooth; And a direction shift gear unit disposed between an inner circumferential surface of the outer ring gear and an outer circumferential surface of the inner ring gear and including a spur gear that rotates in engagement with the inner gear tooth portion and the outer gear tooth portion, thereby driving the rotational force of the motor. The present invention provides a neutron focusing device for an ultra-small neutron scattering device including a diverting power transmission unit for transmitting to a module.

According to the present invention, the focusing plate is an intermediate unit focusing plate fixedly installed along a horizontal center line; A plurality of upper and lower unit focusing plates are respectively installed on the upper and lower portions of the intermediate unit focusing plate and move symmetrically with respect to the unit focusing plate facing each other to form a reflective curved surface.

According to the present invention, the drive module is installed to extend in the up and down direction from one side of the frame, the upper and lower threaded shaft formed on the outer circumferential surface in the opposite direction to each other; Upper and lower nut members having upper and lower threaded portions of the rotating shaft respectively inserted and screwed to move up and down in opposite directions according to the rotation of the rotating shaft; Upper and lower rack gears fixedly coupled to the upper and lower nut members; And upper and lower transmission gears coupled to the upper and lower rack gears by gears, wherein gears formed of one end of the upper and lower focusing plates are provided in a plurality of upper and lower centers, respectively, about a horizontal center line of the focusing plate. By gear coupling with the upper and lower transmission gears, respectively, the curvature of the reflective curved surface is adjusted while the upper and lower focusing plates move symmetrically in accordance with the rotation of the rotary shaft.

According to the present invention, the direction change power transmission unit includes a worm gear that rotates by receiving the driving force of the motor, the gear teeth are formed on the outer peripheral surface of the rim of the outer ring gear to mesh with the worm gear, the spur gear is the rotating shaft Is coupled to the top of the.

According to the present invention, in the micro-angle neutron scattering device, the motor is controlled to return to the flat position automatically (curvature = 0) only by one direction rotation when the curvature of the focusing plate exceeds the allowable value.

According to the present invention, the reflecting surfaces of the unit focusing plates are formed to have a constant curvature in the transverse direction so that the integration efficiency is improved.

According to the present invention, in a neutron focusing device installed at a specific Bragg angle and reflecting neutrons corresponding to a specific wavelength band to focus neutrons to a specific target, by adjusting the focus by adjusting the curvature of the reflective curved surface of the focusing plate to a specific target It is possible to focus neutrons. Accordingly, fine tuning is possible to focus the neutron beam on a specific target, and even when the position of the specific target is changed, it is possible to solve the problem of newly processing the reflective surface.

Further, according to the present invention, even if a motor providing a driving force for adjusting the focus of the reflective curved surface of the focusing plate provides excessive movement due to a malfunction or a user's operation error, the movement of the focusing plate is limited within a certain range, Even if over-rotation occurs, it can be eliminated without damaging the device, thereby preventing damage and breakage of the neutron focusing device. In particular, since the neutron focusing device is installed in a shielded bunker of the micro-angle neutron scattering device and cannot be observed with the naked eye, such a device damage prevention function improves the durability and safety of the micro-angle neutron scattering device. It is an object of the present invention to provide a neutron focusing device of an ultra small angle scattering device that enables forward and reverse rotation of a rotating shaft for adjusting the curvature of a reflective curved surface by using one-way rotation of a motor.

According to the present invention, there is an advantage that the focusing plate can move in both directions in a direction in which the curvature of the reflective curved surface increases and decreases by one direction rotation of the motor.

In addition, according to the present invention, as the neutron focusing efficiency is increased, the measurement time in the ultra-small neutron scattering apparatus can be shortened.

In addition, since the neutron focusing device according to the present invention is structurally stable and is formed in a structure that avoids interference with other arrangements (for example, super mirror guide tubes, etc.) around the space in which the focusing device is installed, or interference with the neutron movement path, When multiple devices share neutrons of various wavelengths guided to a super mirror induction tube, the sharing efficiency is improved.

1 is a conceptual diagram illustrating a basic configuration of a general micro angle scattering device.
2 is a perspective view showing a BH single crystal device according to the prior art.
3 is a perspective view showing a portion of the second wall surface in order to show the interior of the BHA single crystal device according to the prior art.
4 is a perspective view of the neutron focusing device of the ultra-small neutron scattering apparatus according to an embodiment of the present invention, showing the internal structure with some members in a perspective view.
4 is a perspective view of the neutron focusing apparatus of the ultra-small neutron scattering apparatus according to an embodiment of the present invention, showing the internal structure by showing some members transparently.
5 is a diagram illustrating a driving module of the neutron focusing apparatus of the ultra-small neutron scattering apparatus according to the embodiment of the present invention.
6 is a cross-sectional view showing the gear coupling relationship of the neutron focusing apparatus of the ultra-small neutron scattering apparatus according to an embodiment of the present invention.
FIG. 7 is a view illustrating a turning gear part of a neutron focusing device of an ultra-small neutron scattering device according to an embodiment of the present invention.
FIG. 8 is a perspective view of a neutron focusing apparatus of an ultra-small neutron scattering apparatus according to another embodiment of the present invention, in which some members are shown transparently to show an internal structure.
FIG. 9 is a partially enlarged view of the neutron focusing device shown in FIG. 8.
10 is a schematic diagram of an ultra-small neutron scattering apparatus employing a neutron focusing apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the neutron focusing apparatus of the ultra-small neutron scattering apparatus according to an embodiment of the present invention will be described in detail.

 Figure 4 is a perspective view of the neutron focusing device of the ultra-small neutron scattering apparatus according to an embodiment of the present invention, showing a part of the internal structure by showing a transparent portion, Figure 5 is an ultra-small angle according to an embodiment of the present invention FIG. 6 is a view illustrating a driving module of a neutron focusing device of a neutron scattering device, FIG. 6 is a view illustrating a gear coupling relationship of a neutron focusing device of a micro angle neutron scattering device according to an embodiment of the present invention, and FIG. 10 is a diagram illustrating a direction shifting gear unit of the neutron focusing device of the ultra-small neutron scattering device according to the embodiment.

4 to 7, the neutron focusing device 300 according to the present invention includes a frame 310, a focusing plate 320 formed of a plurality of unit focusing plates, a driving module 340, a motor 360, and It includes a divert power transmission.

The frame 310 has an overall rectangular shape including an upper surface 312, a lower surface 314 and both side surfaces 316 and 317. One side 317 of the frame 310 is partly detachably installed so that the focusing plate 320 and the like can be installed inward.

The frame 310 includes a focusing plate 320 for focusing the neutron beam inwardly. The focusing plate 320 includes a plurality of unit focusing plates 321, 322a, 322b, 324a, and 324b, and each unit focusing plate 321, 322a, 322b, 324a, and 324b has both sides of the frame 310. Both ends are supported inside 316 and 317.

The unit focusing plates 321, 322a, 322b, 324a, and 324b include a middle unit focusing plate 321 provided along a center, ie, a transverse centerline of the focusing plate 320, and an upper portion of the intermediate unit focusing plate 321, and The upper unit focusing plate (322a, 322b) and the lower unit focusing plate (324a, 324b) are respectively provided in a plurality.

On the surfaces of the unit focusing plates 321, 322a, 322b, 324a, and 324b, a reflecting surface 325 is formed to diffract and reflect the neutron beams of a specific wavelength band selected by the Bragg angle, and to transmit the neutron beams of the remaining unselected wavelength bands. The reflective curved surface that focuses the neutron beam in the wavelength band selected by the overall arrangement of the reflective surfaces 325 of the unit focusing plates 321, 322a, 322b, 324a, and 324b to a specific target.

The reflective surface 325 may use a highly oriented pyrolytic graphite plate or a silicon single crystal material that diffracts a specific wavelength of the neutron beam and transmits the remaining wavelength according to the Bragg angle. That is, the reflective curved surface is formed by fixing the reflective surface made of highly anisotropic pyrolytic graphite plate or silicon single crystal material to each reflective surface frame of each unit focusing plate 321, 322a, 322b, 324a, 324b. At this time, the reflecting surfaces 325 of each of the unit focusing plates 321, 322a, 322b, 324a, and 324b are curved to have a constant curvature in the horizontal direction, that is, the horizontal direction. Therefore, when the vertical curvature of the focusing plate 320 is adjusted according to the movement of the unit focusing plates 321, 322a, 322b, 324a, and 324b, the performance of focusing the neutron beams to a specific target in the selected wavelength band is improved.

 According to the present invention, the middle unit focusing plate 321 is fixed in the focusing plate 320, and the upper unit focusing plates 322a and 322b and the lower unit focusing plates 324a and 324b are connected to the middle unit focusing plate 321. It is installed so as to be able to move in a bending direction and a spreading direction with respect to the curved surface formed by the reflective surfaces, that is, the curvature of the reflective curved surface increases and the curvature of the reflective curved surface decreases.

To this end, the upper unit focusing plates 322a and 322b and the lower unit focusing plates 324a and 324b rotate symmetrically, that is, in opposite directions. Referring to FIG. 6, when the upper unit focusing plates 322a and 322b rotate clockwise and the lower unit focusing plates 324a and 324b rotate counterclockwise, the curvature of the reflective surface increases, and the upper unit focusing plates 322a and 322b rotate. ) Rotates counterclockwise, and the lower unit focusing plates 324a and 324b rotate clockwise, the curvature of the reflective curved surface becomes smaller. This allows the neutron beam to be focused by focusing the neutron beam on a specific target.

The upper and lower unit focusing plates 322a, 322b, 324a, and 324b are provided with gears 323a, 323b, 325a, and 325b in one end, respectively, and rotate with power. Gears 323a, 323b, 325a, and 325b are gear-coupled to the upper and lower transmission gears 356a and 356b to form a reflective curved surface that is symmetric in the vertical direction while rotating.

According to the present invention, the upper and lower focusing plates 322a, 322b, 324a, and 324b of the focusing plate 320 are simultaneously symmetrically driven to include a driving module 340 for adjusting the curvature of the reflective curved surface.

The driving module 340 is operated by receiving the driving force of the motor 360. The drive module 340 includes a rotation shaft 341, upper and lower nut-shaped members 350a and 350b, upper and lower rack gears 354a and 354b, and upper and lower transmission gears 356a and 356b. In FIG. 5, the upper and lower transmission gears 356a and 356b of the drive module 340 are omitted (see FIG. 6).

The rotating shaft 341 is installed to extend in the vertical direction from one side of the frame 310, the upper end is projected above the upper surface 312 of the frame 310, the bevel gear 342 is installed on the upper end. The bevel gear 342 receives the driving force of the motor 360 to rotate the rotation shaft 341 clockwise or counterclockwise. The bevel gear 342 is included in the driving connection portion as part of a portion for transmitting the rotational force of the motor 360 to the rotation shaft 341.

 On the outer circumferential surface of the rotation shaft 341, the upper threaded portion 344a and the lower threaded portion 344b, each of which is threaded in opposite directions, are formed at the upper and lower portions, respectively.

The upper and lower threaded members 350a and 350b to which the upper threaded portion 344a and the lower threaded portion 344b are inserted and screwed are installed in the upper threaded portion 344a and the lower threaded portion 344b of the rotary shaft 341. The upper and lower nut-shaped members 350a and 350b are formed with corresponding threads corresponding to the upper threaded portion 344a and the lower threaded portion 344b on the inner circumferential surface of the through hole into which the upper threaded portion 344a and the lower threaded portion 344b are inserted. . Since the upper and lower nut members 350a and 350b are screwed with the upper threaded portion 344a and the lower threaded portion 344b, the rotating shaft 341 moves up and down while rotating. However, since the thread forming direction is the opposite direction, the threads move in opposite directions.

Upper and lower rack gears 354a and 354b are fixed to the upper and lower nut members 350a and 350b.

In addition, the upper and lower rack gears 354a and 354b are respectively provided so that the upper and lower transmission gears 356a and 356b are gear-coupled (see FIG. 6). The upper and lower transmission gears 356a and 356b are gear-coupled with the gears 323a, 323b, 325a and 325b provided as one end of the upper and lower unit focusing plates 322a, 322b, 324a and 324b, respectively.

The guide shaft 343 extends in parallel with the rotation shaft 341 through the upper and lower nut members 350a and 350b to one side of the rotation shaft 341. The guide shaft 343 functions to guide and support the movement when the upper and lower nut members 350a and 350b move in accordance with the rotation of the rotation shaft 341.

The operation of the driving module 340 will be described. When the rotary shaft 341 receives the driving force of the motor 360 and rotates to one side, the upper screw portion 344a and the lower screw portion 344b formed on the outer circumferential surface of the rotary shaft 341 are opposite in the thread forming direction, respectively, The upper and lower nut-shaped members 350a and 350b screwed to the threaded portion 344a and the lower threaded portion 344b move in opposite directions, respectively. That is, when the upper nut member 350a moves upward, the lower nut member 350b moves downward, and when the upper nut member 350a moves downward, the lower nut member 350b moves upward.

The upper and lower nut-shaped members 350a and 350b are fixed to the upper and lower rack gears 354a and 354b, respectively, and thus the upper and lower rack gears 354a according to the movement of the upper and lower nut-shaped members 350a and 350b. , 354b move together and are opposed to each other in the direction of movement of the upper and lower rack gears 354a and 354b. For example, when the upper rack gear 354a moves upward, the lower rack gear 354b moves downward.

Upper and lower transmission gears 356a and 356b are gear-coupled to each of the upper and lower rack gears 354a and 354b and provided as one end of the upper and lower unit focusing plates 322a, 322b, 324a and 324b. 323a, 323b, 325a, and 325b rotate. Since the gears 323a and 323b provided as one end of the upper unit focusing plates 322a and 322b and the gears 325a and 325b provided as one end of the lower unit focusing plates 324a and 324b are opposite to each other in the direction of rotation thereof, The upper unit focusing plates 322a and 322b and the lower unit focusing plates 324a and 324b are symmetrical with respect to the middle unit focusing plate 321, that is, move in opposite directions to form a reflective curved surface, and the curvature of the reflective curved surface is Is changed.

Therefore, the upper unit focusing plate 322a and 322b and the lower unit focusing plate 324a and 324b are bent with respect to the middle unit focusing plate 321 by the rotation of the rotation shaft 341, and the curvature increases, or the curvature decreases while being unfolded. The curvature is adjusted.

By making this symmetrical movement of the upper and lower focus plates 322a, 322b, 324a, 324b, the curvature of the focus plate 320 is adjusted, thereby adjusting the position of the focal point so that the neutron beam can be focused onto a specific target. It will be possible.

According to the present invention, the motor 360 is installed on the outer surface of the upper surface 312 of the frame 310. In some cases, neutron beamlines may share neutrons of various wavelengths with multiple devices. For example, several neutron-assisted devices, including ultra-small neutron scattering devices, are installed along the neutron guide, and in order for multiple devices to operate simultaneously, the first device uses some wavelength of neutrons, Neutrons should be sent for the device behind.

The neutron focusing device is installed to guide neutrons of a specific wavelength band from a neutron beamline to a specific target. To this end, the neutron focusing device must be cut in a super mirror guide tube installed along the neutron beamline and installed in a space therebetween. However, the neutron, which was induced from the neutral source without substantially losing the flow rate by total reflection in the vacuum mirror induction tube, loses the flow rate while being inversely proportional to the square of the distance in the air by the space formed for the installation of the neutron focusing device. Therefore, there is a need for a structure that can minimize the space required for installing the neutron focusing device while avoiding interference with the neutrons except for the focusing plate.

According to the present invention by installing the motor 360 on the upper surface of the frame 310 forming a frame while achieving structural stability, the power transmission system from the motor 360 and the motor 360 to the rotating shaft 341, the super mirror induction It is comprised so that interference with a pipe | tube or the neutron path 101 may be avoided.

According to the present invention, a control unit (not shown) capable of controlling the rotation of the motor 360 is included. The control unit (not shown) is installed outside the shielding bunker (FIG. 10, 102) in which the neutron focusing device is installed, and measures the neutron beam shape or neutron intensity focused by the neutron focusing device using a neutron camera or a neutron detector in real time. The rotation of the motor 360 is controlled such that the neutron beam is optimal.

The motor 360 transmits power to the bevel gear 342 via the turning power transmission unit.

The diverting power transmission unit includes a diverting gear unit 380 and a driving connection unit.

The turning gear part 380 includes an outer ring gear 381, an inner ring gear 385, and a spur gear 388.

The outer ring gear 381 includes an inner gear tooth portion 383 formed in a part of the inner circumferential surface of the annular edge portion 382 protruding in one direction along the circumference of the disc. The edge 382 may be partially formed to correspond to the inner gear tooth 383. When the edge portion 382 is partially formed, it is referred to as the inner circumferential surface of the edge portion 382 including the inner circumferential surface of an annularly extending portion.

The inner ring gear 385 includes an outer gear tooth portion 386 disposed at a central portion of one surface of the outer ring gear 381 and formed at a portion of the outer circumferential surface thereof. The inner circumferential surface of the outer ring gear 381 and the outer circumferential surface of the inner ring gear 385 are concentric and are integrally combined to rotate together. The inner ring gear 385 is connected to the drive shaft of the motor 360.

 A spur gear 388 is disposed between the inner circumferential surface of the outer ring gear 381 and the outer circumferential surface of the inner ring gear 385. The spur gear 388 is arranged to be able to engage the inner gear tooth 383 of the outer ring gear 381 and the outer gear tooth 386 of the inner ring gear 385. The spur gear 388 is connected to a coupling 392 that transmits power to the rotation shaft 341.

The inner gear tooth 383 of the outer ring gear 381 and the outer gear tooth 386 of the inner ring gear 385 are formed in positions not facing each other. Accordingly, when the inner ring gear 385 and the outer ring gear 381 rotate integrally, the spur gear 388 rotates forward and backward while alternately engaging the inner gear teeth 383 and the outer gear teeth 386. At this time, the inner gear tooth portion 383 and the outer gear tooth portion 386 are formed in a length corresponding to each other, the spur gear 388 is formed by the inner gear tooth portion 383 and the outer gear tooth portion 386 Rotate in the opposite direction and at the same amount of rotation. That is, when the mesh is rotated by engaging the inner gear tooth 383 at the initial position and then rotating again by engaging the outer gear tooth 386 again, the initial position is returned.

Referring to FIG. 4 and FIG. 7, the unit focusing plates 321, 322a, 322b, 324a, and 324b of FIG. 4 are disposed flat. This is called a flat position (curvature = 0). In this state, the motor 360 is driven to focus on a specific target. When the inner ring gear 385 is rotated while the motor 360 rotates, the inner ring gear 385 and the outer ring gear 381 are integrally formed. The outer ring gear 381 also rotates in the same direction. At this time, if the spur gear 388 is engaged with the outer gear teeth 386 of the inner ring gear 385, the spur gear 388 rotates in the opposite direction to the inner ring gear 385, and transmits a driving force to the rotating shaft 341, As a result, the upper and lower unit focusing plates 322a, 322b, 324a, and 324b move while being focused. The motor 360 stops when focus is achieved.

Then, if the position of a particular target is changed or needs to be re-adjusted, the motor 360 rotates again in the same direction, in which the spur gear 388 engages with the inner ring gear 385 and rotates upwards and downwards. Lower unit focusing plates 322a, 322b, 324a, and 324b may be further bent. However, since the outer gear tooth portion 386 of the inner ring gear 385 is formed only on a part of the outer circumferential surface of the inner ring gear 385, the spur gear 388 is short with the outer gear tooth portion 386 of the inner ring gear 385. The engagement is released, and the bending of the upper and lower unit focusing plates 322a, 322b, 324a, 324b is stopped. At this time, the position of the upper and lower unit focusing plate (322a, 322b, 324a, 324b) is the maximum curvature position of the focusing plate 320, and the maximum rotation position of the upper and lower unit focusing plate (322a, 322b, 324a, 324b) Becomes

The spur gear 388, which is disengaged from the inner ring gear 385, is again engaged with the inner gear tooth 383 of the outer ring gear 381, thereby causing the spur gear 388 to rotate in the opposite direction. The spur gear 388 rotates in the same direction as the outer ring gear 381 and moves in a direction in which the upper and lower unit focusing plates 322a, 322b, 324a, and 324b are extended.

If the spur gear 388 is continuously rotated by the outer ring gear 381 by continuously driving the motor 360, the inner gear teeth 383 of the outer ring gear 381 are formed only on a part of the inner circumferential surface, so that the engagement is soon performed. The spur gear 388 and thus moving unit focusing plates 322a, 322b, 324a, 324b are also stopped. At this time, the unit focusing plates 322a, 322b, 324a, and 324b are returned to the initial position, that is, the flat position.

Since the inner gear tooth portion 383 and the outer gear tooth portion 386 are formed only at a certain portion, a portion without any engagement can be formed. At this time, the spur gear 388 does not rotate but waits. When the spur gear 388 is meshed with the outer gear tooth 386 of the inner ring gear 385, the upper and lower unit focusing plates 322a, 322b, 324a, and 324b operate in the bending direction again.

As described above, according to the directional gear unit 380, the motor 360 rotates in one direction, but the forward and reverse rotation is transmitted to the spur gear 388 and the rotating shaft 341 connected thereto, thereby enabling forward and reverse rotation.

In addition, the maximum rotational positions of the upper and lower unit focusing plates 322a, 322b, 324a, and 324b are set, and the upper and lower unit focusing plates 322a, 322b, 324a, and 324b move only between the maximum rotational position and the flat position. This is allowed.

Therefore, even if excessive rotation occurs due to a malfunction of the motor, the upper and lower unit focusing plates 322a, 322b, 324a, and 324b cannot rotate beyond the maximum rotational position, and are also prevented from rotating in the opposite direction beyond the flat position. do. As a result, the driving module 340 and the upper and lower unit focusing plates 322a, 322b, 324a, and 324b may be prevented from being damaged or damaged due to a malfunction of the motor 360 or a motor operation error of the coordinator. That is, damage to the machine due to a malfunction of the motor or a motor operation error of the adjuster can be prevented at the source.

Whether the spur gear 388 rotates in the direction in which the focusing plate 320 is bent or rotates when the inner ring gear 385 is engaged is determined by the upper threaded portion of the drive connecting portion and the rotating shaft 341. 344a) and the lower threaded portion 344b may be changed according to the design.

The driving connector is a component for transmitting the driving force of the motor 360 to the rotary shaft 341, the coupling 392 connected to the spur gear 388, the transmission bevel gear 394 and the rotating shaft (connected to the coupling 392) And a bevel gear 342 connected to the top at 341 and engaged with the transmission bevel gear 394.

8 is a perspective view of a neutron focusing apparatus according to another embodiment of the present invention, Figure 9 is a partially enlarged perspective view of the neutron focusing apparatus shown in FIG. 8 and 9 show a part of the internal structure together with a transparent.

The neutron focusing device according to another embodiment of the present invention, when compared with the neutron focusing device according to an embodiment of the present invention, the configuration of the drive connecting portion for transmitting the driving force of the motor 360 to the rotary shaft 341 . Description of the same components as in the embodiment of the present invention will be omitted.

A neutron focusing device according to another embodiment of the present invention includes a shock gear 396 connected to a motor shaft. The worm gear 396 has a gear tooth formed spirally on the outer circumferential surface thereof, and meshes with a gear tooth 384 formed on the outer circumferential surface of the edge portion 382 of the outer ring gear 381.

According to another embodiment of the present invention, the spur gear 388 is coupled to the top of the rotation shaft 341. Accordingly, the bevel gear 342 and the transmission bevel gear 394 may be omitted, and power is directly transmitted from the turning gear part 380 to the rotation shaft 341.

10 is a schematic diagram of an ultra-small neutron scattering apparatus employing a neutron focusing apparatus according to the present invention.

Referring to FIG. 10, the ultra-small neutron scattering apparatus includes a neutron light path 101 serving as a moving path of neutrons, a shielding bunker 102 provided in the neutron light path 101, and a first installed inside the shielding bunker 102. And second neutron focusing devices 300a and 300b. The first and second neutron focusing devices 300a and 300b are installed at a corresponding Bragg angle to induce neutrons in a specific wavelength band. For example, the first neutron focusing device 300a induces neutrons in the long wavelength band, and the second neutron focusing device 300b is installed at the Bragg angles so as to induce neutron flow in the short wavelength band.

Neutrons of a particular wavelength band diffracted and reflected by the first and second neutron focusing devices 300a and 300b are guided to the first and second monochromators 120 and 130. In the first and second neutron focusing devices 300a and 300b, the rotation of the motor 360 is controlled by the controller, and accordingly, the curvature of the reflective curved surface of the focusing plate 320 is adjusted, thereby adjusting the first and second monochromators 120. 130 can be adjusted to focus the neutron beam. Super mirror guide tubes 112 and 114 may be installed between the neutron focusing devices 300a and 300b and the first and second monochromators 120 and 130 in some cases.

The ultra-small neutron scattering device is a Bragg at the first to third analyzers 210, 220, 230 and the first to third analyzers 210, 220, 230 disposed to face the first monochromator 120. A first set of analyzers 200 comprising banks of first to third detectors 240, 250, 260 for counting diffracted neutrons, and a first to third analyzers 210, 220 in a first monochromator 120. And a second analyzer set 132 and a second analyzer set 132 and a second analyzer 130 disposed to face the second monochromator 130. And a sample 131 disposed in the path of movement of the neutron beam to 132. The first and second monochromators 120 and 130 and the first to third analyzers 210, 220 and 230 are made of silicon single crystal.

The neutron N2 passing through the first monochromator 120 is scattered in the sample 121 and proceeds to the first to third analyzers 210, 220, and 230. Some of the neutron beams passing through the sample 121 are diffracted by the first analyzer 210, and the neutrons N3 are detected by the first detector 240, and the neutron beams passing through the first analyzer 210 are A portion of the second analyzer 220 is diffracted, and the neutron N4 is detected by the second detector 250, and the neutron beam passing through the second analyzer N4 is partially diffracted by the third analyzer 230. The neutron N5 is detected by the third detector 260. The first to third detectors 240, 250, and 260 banks are neutron meters that measure the number of Bragg scattered neutrons from a sample or the first to second analyzers 210, 220, and 230. The first to third detectors 240, 250, and 260 may detect and count scattered neutrons, detect and count unscattered neutrons through the transmittance measurement detector 160, and monitor the beam monitor 150. The neutron flux transmitted through the first monochromator 120 may be detected through the neutron beam. It is also possible to deduce the total incident neutron quantity and transmitted neutron quantity from them.

Analyzer chamber 201 in which the monochromator chamber 122 having the first monochromator 120 is installed, the first to third analyzers 210 and 220 and 230 and the banks to which the first to third detectors 240, 250 and 260 are installed. Is maintained in vacuum by the vacuum pump 140 if necessary. The vacuum pump 140 is installed outside the isolation groove 103 and is connected to the monochromator chamber 122 and the analyzer chamber 201 through the vacuum tube 141. The vacuum tube 141 is supported through the vibration blocking block 142.

According to the present invention, since it is possible to focus the neutron beam on the target by adjusting the curvature of the reflective curved surfaces of the neutron focusing devices 300a and 300b, the first and second monochromators 120, Even if the position of 130) is changed, it is possible to focus by adjusting the curvature of the reflective surface without processing the new neutron focusing device, and in particular, the focusing operation by adjusting the curvature of the reflective surface is shielded with the neutron focusing device installed. Since it can be made through the drive control of the motor 360 from the outside of the bunker 102, it is unnecessary to work to disassemble the high-load shielding bunker in order to focus.

In addition, according to the present invention, it is possible to prevent the occurrence of a malfunction of the neutron focusing apparatus due to a malfunction of the motor 360 or an error in operating the motor 360 of the adjuster. Since the neutron focusing device is isolated from the outside by the shielding bunker 102, it is difficult to visually check the malfunction. Therefore, the malfunctioning may directly lead to failure of the neutron focusing device. However, the present invention improves the durability and stability of the ultra-small neutron scattering device employing the neutron focusing device because the neutron focusing device is not broken or broken by the malfunction and operation error of the motor 360.

On the other hand, it is not enough to calculate whether the neutron beam is focused to the focusing target to the maximum, it is a task that requires fine adjustment to the actual installation state. In the present invention, fine tuning is possible to adjust the curvature of the reflective surface while measuring the neutron beam shape or neutron intensity in real time with a neutron camera or a neutron detector at the location of the focusing target.

300, 300a, 300b: neutron focusing device
310: frame 320: focusing plate
321: middle unit focusing plate 322a, 322b: upper unit focusing plate
324a, 324b: lower unit focusing plate 323a, 323b, 325a, 325b: gear
325: reflective surface
340: drive module 341: rotation axis
342: bevel gear 343: guide shaft
344a: upper threaded portion 344b: lower threaded portion
350a: upper nut member 350b: lower nut member
354a: Upper rack gear 354b: Lower rack gear
356a: upper transmission gear 356b: lower transmission gear
360: motor 380: directional gear unit
381: outer ring gear 382: rim
383: inner gear tooth 384: gear tooth
385: inner ring gear 386: outer gear tooth
388: Spur Gears 396: Worm Gears

Claims (6)

A bordering frame;
It includes a plurality of unit focusing plate installed in the vertical direction, each of the unit focusing plate is extended in the horizontal direction while both ends are supported on the inner side of both sides of the frame, by the reflecting surface provided on the surface of the unit focusing plate A focusing plate on which a reflective curved surface curved in an up and down direction may be formed;
A driving module configured to adjust the curvature of the reflective curved surface by rotating the unit focusing plate symmetrically with respect to each other based on a horizontal center line;
A motor providing a driving force to the drive module; And
An outer ring gear having an inner gear tooth formed on a portion of an inner circumferential surface of the edge portion protruding in one direction along the circumference of the disc; An inner ring gear disposed at a central portion of one side surface of the outer ring gear and formed on a portion of an outer circumferential surface thereof and having an outer gear tooth formed at a length corresponding to the inner gear tooth at a position not facing the inner gear tooth; And a direction shift gear unit disposed between an inner circumferential surface of the outer ring gear and an outer circumferential surface of the inner ring gear and including a spur gear that rotates in engagement with the inner gear tooth portion and the outer gear tooth portion, thereby driving rotational force of the motor. The neutron focusing device of the ultra-small neutron scattering device, characterized in that it comprises a diverting power transmission unit for transmitting to the module. The method of claim 1,
The focusing plate may include a middle unit focusing plate fixedly installed along a horizontal center line;
A plurality of neutron focusing of the ultra-neutral neutron scattering device is installed in the plurality of upper and lower portions of the middle unit focusing plate, and each of the upper and lower unit focusing plate symmetrically moving with respect to the unit focusing plate facing each other to form a reflective curved surface Device. 3. The method according to claim 1 or 2,
The drive module
Rotating shaft is installed to extend in the vertical direction from one side of the frame, the upper and lower screw portion is formed in the upper and lower threads formed in the opposite direction to the outer peripheral surface;
Upper and lower nut members having upper and lower threaded portions of the rotating shaft respectively inserted and screwed to move up and down in opposite directions according to the rotation of the rotating shaft;
Upper and lower rack gears fixedly coupled to the upper and lower nut members; And
An upper and lower transmission gear geared to the upper and lower rack gears, respectively,
Gears formed by one end of the upper and lower focusing plates provided in a plurality of upper and lower portions respectively around the horizontal center line of the focusing plate are gear-coupled with the upper and lower transmission gears, respectively, so that the upper and lower parts are rotated according to the rotation of the rotation shaft. The neutron focusing device of the ultra-small neutron scattering device, characterized in that the curvature of the reflective surface is adjusted as the focusing plates move symmetrically. The method of claim 3, wherein
The turning power transmission unit includes a worm gear that rotates to receive the driving force of the motor,
Gear teeth are formed on the outer circumferential surface of the rim of the outer ring gear to mesh with the worm gear,
The spur gear is a neutron focusing device of the ultra-small neutron scattering device, characterized in that coupled to the upper end of the rotating shaft. The method according to claim 1,
The neutron focusing device of the ultra-small neutron scattering device, characterized in that the motor only returns to the flat position (curvature = 0) when the curvature of the focusing plate exceeds the allowable value by only one direction rotation. The method according to claim 1,
In the unit focusing plate, the neutron focusing device of the ultra-small neutron scattering device, characterized in that the reflecting surface is formed to have a constant curvature in the transverse direction.

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