JPH03186743A - Goniometer for x-ray diffraction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a goniometer for X17 diffraction.

(Prior Art) A goniometer for XM diffraction is usually configured around a vertical axis, and a sample stage and an X-ray detector are connected to the X-ray source to detect X-rays as the sample stage rotates around the sample stage. The sample stage and the X-ray detector are linked so that the instrument rotates by twice the angle. However, with this goniometer, the sample surface is vertical, making it difficult to handle liquid or powder samples.

For this reason, a horizontal axis type goniometer that can hold the sample surface horizontally is provided. As shown in Figure 3, this type of goniometer consists of a sample stand that holds the sample fixedly with the sample surface S level, and an
Ray source X and X! It consists of 11 detectors. However, the X-ray source is connected to a high-voltage cable and target cooling water supply and drainage pipes, and is itself a fairly large and heavy object, so in order to rotate such an object around a horizontal axis, it is necessary to
The goniometer as a whole must be of solid construction.

(Problems to be Solved by the Invention) The present invention aims to reduce the weight and size of a horizontal axis type X-ray diffraction goniometer that can hold a sample surface horizontally.

(Means for Solving the Problem) An arm rotatable about a horizontal axis around an X-ray source, a linear guide extending horizontally from the horizontal axis parallel to a rotation surface of the arm, and one end of which is connected to the guide. Slide along and mark this end with an
A link with the same length as the arm to which a line detector is attached and whose other end is connected to the rotating end of the arm, and is rotatable with respect to the arm and link around the connection point of the arm and link. in,
X to always look in one direction spatially! 11! A goniometer was constructed with the source or a sample stage connected to the slider of the guide.

(Function) According to the above configuration, the X Lt source and the guide become fixed parts. The arm and the link form an isosceles triangle, and one end of the base is fixed to the X-ray source and the other end slides on the guide, so the X-rays are Since the source and the Xi detector are at the same distance and rotate by the same angle in opposite directions around the sample, they satisfy the goniometer conditions.Since the X-ray source is fixed in position, the structure allows the XIs source to be moved. Compared to the above, the entire structure is lighter and smaller.

(Example) Fig. 1 shows a front view of the goniometer of the present invention, and Fig. 2 shows a plan view. 1 is a main body of the device, and an arm 2 is attached to the goniometer so as to be rotatable about the 0 point on a horizontal axis. An X-ray tube 3 is attached to this arm so that its center line passes through the zero point.

Therefore, the guide 4 extends horizontally to the right from the center zero point of the X-ray tube.

Reference numeral 5 denotes a slide that slides on this guide, and a link 6 having the same length as the arm 2 connects this slide and the arm 2. The container 7 is fixed. A sample stage 8 is rotatably attached to the connection point between the arm 2 and the link 6. A pulley 81 is fixed to the sample stage 8, and has the same diameter as the pulley 51 fixed to the link coupling bottle protruding from the slider 5, and a steel belt 9 is hung between the two. There is no slippage between the belt 9 and the belt 9. Therefore, even if the slider 5 moves left and right on the guide 4, the tilting table 8 at t7 always points in the same spatial direction. This allows the sample to be placed in a horizontal position. Since the X-ray detector 7 is attached to the link 6, it always faces the sample. The mechanism for keeping the sample stage 8 oriented in a certain direction is the same as that used in drafting machines, and an arm may be used instead of a boob, and a link connecting the arms may be used instead of a belt. Instead of connecting the sample stage and the slider 5, a similar mechanism may be provided between the sample stage and the main body centered on the zero point.

(Effects of the Invention) According to the present invention, the X-ray source changes direction but does not move, the X-ray detector only moves horizontally, and the sample moves in an arc. Although the sample is lightweight, Since a large force is not required to move the device and the heavy parts do not move, the entire device can be made lightweight and compact, and the X-ray source and X1111 detector can be rotated in opposite directions as in the conventional example shown in Figure 3. There is no need for a mechanism to move the link, and by simply sliding the sliding end of the link link 6, the entire link mechanism moves while maintaining a predetermined positional relationship, so it is mechanically simple.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a front view of a conventional example. 1... Device body, 2... Arm, 3... X-ray tube, 4
...Guide, 5...Slider, 6...Link, 7.
...X-ray detector, 8...sample stage, 51.81...pulley, 9...belt.

Claims (1)

[Claims] An arm that can rotate around the X-ray source, a guide that extends in one direction from the X-ray source parallel to the rotation plane of this arm, and one end that slides along this guide and that An X-ray detector is attached to a link having the same length as the arm, the other end of which is connected to the rotating end of the arm, and a link that always faces in one direction with respect to the main body at the connection point between the arm and this link. An X-ray diffraction goniometer consisting of a sample stage mechanically connected to the main body so as to face the sample.