JPH01274048A - Centering device for 6-axis x-ray diffraction apparatus - Google Patents

Abstract

PURPOSE:To enable a higher efficiency in directional adjustment of incident X rays, by arranging two metal fine wires mounted along the diameter of a chi-ring and a goniometer suspended along the diameter of the chi-ring. CONSTITUTION:A point of a needle 2 so mounted on a goniometer head 3 as to let the tip thereof at the position of a sample is on a rotating shaft of a chi-ring. Metal fine wires 6 are mounted with a mounting device 5 on the ring 1. The fine wires 6 are mounted so as to pass separately through the rotating shaft of the ring 1 and consequently, the intersection of the two fine wires makes a point on the rotating shaft of the ring 1. Under such a condition, X rays are incident from one side of the ring 1 to check an incident state thereof downstream by photography. As a positional difference between the intersection of the fine wires 6 and the needle point 2 in a photograph causes a vertical deviation in the incident X rays. Thus, deviation of the incident X rays from the rotating shaft of the ring 1 can be learned by taking into account of distance to the fine wires 6 from the needle point 2 to make a pint to be corrected in optical systems clear thereby enabling efficient implementation of the centering in an incident direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a tool for aligning a six-axis X-ray diffraction device and a necessary X-ray, which is used when analyzing the crystal structure of a substance using X-rays.

[Prior Art] Conventionally, a six-axis X-ray diffraction device N passes through the intersection of the rotational axis of the chi ring and the omega axis in the radial direction of the ring, perpendicular to the omega axis. Adjustments are made by attaching a metal plate with a circular hole on one side of the Chi-ring, the center of which is on the axis of rotation of the Chi-ring.

Normally, in this state, the six-axis X-ray diffraction device is arranged so that the rotating plane of the Chi-ring is almost perpendicular to the X-ray light source, and the photographic movement is placed downstream of the Chi-ring with respect to the X-ray light source. While checking the passage of X-rays using detectors such as shadows, silicon tip plates, and scintillation counters, we adjust the optical system for incident X-rays to maximize the number of X-rays that can be detected.
Adjusting the position of the Tux ray diffraction device. When this state is achieved, it can be said that the X-rays are incident on the diffraction device in a desirable state. Normally, a metal plate with holes is not attached directly to the chi-ring, but a support plate is installed in a position that does not lose the rotational freedom of the chi-ring and does not block the incident X-rays. A method is used to attach open metal plates. In addition, the accuracy improves as the length of the hole drilled in the metal plate increases relative to the diameter of the hole, that is, the ratio of the center diameter of the metal plate, so instead of using a metal plate with holes, it is possible to Some use a metal plate with a tube attached.

[Problem to be solved by the invention] In the conventional method, if the large sword beam deviates from the desired direction, it will be blocked by a metal plate and no X-rays will pass downstream of the chi ring. Not coming. For this reason, there is a drawback that information on how to correct the positions of the optical system and the diffraction device is not available.

In view of the above problems, the present invention does not use a metal plate with holes or a metal plate to which a metal tube is attached, but rather reveals the discrepancy between the actual direction of incident X-rays and the desired direction. An object of the present invention is to provide an alignment tool for a six-axis X-ray diffraction apparatus that improves the efficiency of direction adjustment.

[:! ! Means for Solving the Problem] The present invention provides a position adjustment tool for aligning the axis of incidence of X-rays entering a six-axis X-ray diffractometer with the rotation axis of the chi ring of the six-axis X-ray diffractometer. The installation with the fine adjustment means and the tension fine adjustment means shall be equipped with two thin metal wires installed in the radial direction of the chi ring by means of a tool, and a goniometer installed vertically in the radial direction of the chi ring. This is an axis alignment tool for a six-axis X-ray diffractometer characterized by:

[Function] According to the present invention, the attachment of the metal wires is finely adjusted using the position fine adjustment means of the tool and the tension fine adjustment means so that the intersection point of the two metal wires is the rotation axis position of the chi ring, and the intersection point and the goniometer are adjusted. The projection of the intersection point and the needle tip is used for axis alignment, with the direction in which the tips of the needles are connected as the axis of rotation of the chi ring.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows one embodiment of the present invention, and is a perspective view of a state in which an alignment U tool using two silk thin metal wires and a needle tip attached to a goniometer head is attached to a chi ring. In the figure, 1 is the chi ring of the six-axis X-ray diffraction device, 2 is the needle attached to the goniometer head 3 on the Omega rotation axis so that the needle tip is at the sample position, and the needle tip is the chi ring. It is on the axis of rotation. 4 is the omega table.

Reference numeral 5 denotes a mounting tool having a position fine adjustment function and a tension fine adjustment function, and is used to attach the thin metal wire 6 to the chi ring 1. Here, the thin metal wires 6 are installed so as to each pass through the rotation axis of the chi ring 1.

Therefore, the intersection of the two thin metal wires is a point on the rotation axis of the chi ring 1. In this state, the X-rays are directed from one side of the Chi-ring 1, and the incident state of the X-rays is confirmed by the shadow of the photo Va downstream of the Chi-ring.

The difference between the intersection point of the thin metal wire 6 shown in the photo and the position of the needle tip 2 gives a vertical deviation to the incident X-ray at that point, so consider the distance from the needle tip 2 to the thin metal wire 6. If so, the deviation of the incident X-ray from the rotational axis of the Chi-ring 1 can be determined, so the points to be corrected in each optical system can be determined, and the axis alignment in the direction of the sword can be performed efficiently.

Figure 2 is a perspective view of the tool attached to the chi ring.
1 is the tool body that is attached to the chi ring, and the chi ring is attached to the tool itself.
Insert the ring and secure with the set screw 22. 2
3 is a support rod made of thin metal wire that has a fine movement function to the left and right. It is provided with a hole or capillary 24 through which a thin metal wire passes, oriented at right angles to the rod itself. A helical spring 25 is attached to one side of the rod, and a threaded area is provided at the end of the rod, and a nut 26 screwed into this area is rotated to change its position relative to the main body 21, thereby making fine movement from side to side. I do. 27 is a winding rod for winding up a thin metal wire and adjusting the tension so that the thin metal wire is stretched along the surface of the chi ring. A gear 28 is attached to one end of this winding rod 27, and a worm 29 that rubs against it rotates to perform winding.

FIG. 3 is an enlarged view of the portion shown as the fine adjustment section 30 in FIG. 2, and is a perspective view of the portion that finely adjusts the position of the support rod used to adjust the position of the thin metal wire.

25 is a helical spring, one end of which is attached to the spring mounting plate 33 of the support rod 23, and the other end of which is attached to the frame 3 that receives the support rod 23.
It is attached to 4. Reference numeral 26 is a nut, and fine adjustment of the position is performed by rotating this nut.

In this way, the embodiment of the present invention does not use a metal plate, but uses a mounting tool equipped with a position fine adjustment means and a tension fine adjustment stage to attach a set of two thin metal wires to the chi ring. The difference between the actual direction and the desired direction of the incident X-ray can be revealed from the intersection point and the point ahead of the goniometer, thereby improving the efficiency of adjusting the direction of the required X-ray.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide an alignment tool for an X-ray diffraction apparatus that improves the direction adjustment of incident X-rays.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of a mounting tool, and FIG. 3 is an enlarged perspective view of a fine adjustment section. 1... Chi ring 2... Needle 3... Goniometer head 4... Omega table 5... Mounting tool 6...
metal thin wire

Claims (1)

[Claims] (1) A fixture equipped with a position fine adjustment means and a tension fine adjustment means in an alignment tool for aligning the incident axis of X-rays incident on a six-axis X-ray diffraction device with the rotational axis of the chi ring of the six-axis X-ray diffraction device. An axis alignment tool for a six-axis X-ray diffractometer, characterized by comprising two thin metal wires installed in the radial direction of a chi-ring, and a goniometer installed vertically in the radial direction of the chi-ring. .