JPS61207911A - Sample for calibrating x-ray type magnetic film measuring instrument - Google Patents

Abstract

PURPOSE:To prepare easily a sample with good accuracy and to prevent the failure thereof by the constitution consisting in using a material which emits the fluorescent X-ray to be measured in the components of a magnetic film as a plate-shaped base material and adhering aluminum as a filter material for adjusting the intensity of the fluorescent X-ray to be detected onto such base material. CONSTITUTION:The primary X-ray 3 emitted from an X-ray generator 1 arrives at iron 6 which is the base material. The fluorescent X-ray generated from the iron enters a detector 2 after the X-ray is attenuated by the aluminum 5 which is the filter material. Iron is used as the base material of the sample for calibration in the case in which the magnetic film is iron oxide. The intensity of the fluorescent X-ray is made approximately the same as heretofore by selecting suitably the thickness of the aluminum 5 and such material is usable as the sample for calibration.

Description

DETAILED DESCRIPTION OF THE INVENTION A [Field of Industrial Application] This invention relates to maintaining the accuracy of an apparatus that uses fluorescent X-rays to measure the thickness of magnetic coatings on magnetic disks, magnetic tapes, etc.

B (Summary of the Invention) The present invention provides a method for compensating for changes in measured values due to environmental changes such as temperature changes in an apparatus that uses fluorescent X-rays to measure the thickness of magnetic coatings on magnetic disks, magnetic tapes, etc. By using the main component of the coating material to be measured as the base material and aluminum foil pasted on top of it as a calibration sample, it is easy to manufacture, stable, and easy to use when using the device. It is a companion that allows you to improve accuracy.

C [Prior Art] Conventionally, as a sample for calibration, the target material itself or a substantially similar material has been manufactured and used.

D (Problem to be solved by the invention) In conventional samples, the thickness of the target magnetic coating is generally extremely thin (a, 2 to 5 μm), and is easily scratched.
There are six disadvantages, such as the tendency to change over time and the difficulty of obtaining a sample with a uniform thickness.As a sample for careful calibration to maintain the accuracy of the device, it is recommended to use a sample that has the same energy as the measurement target and whose intensity covers the entire measurement range. It is sufficient if the detector can obtain fluorescent X-rays that can be covered.

Therefore, the present invention aims to obtain such a sample.

[Next means to solve the EC problem] In order to solve the above-mentioned voltage point, the material that emits fluorescent X-rays, which is the measurement target in the components of the magnetic coating, is made into a plate-like material, and the detected Aluminum is attached as a filter material to adjust the intensity of fluorescent X-rays.
o F (Function) As mentioned above, in the front-bottomed nine calibration samples, the aluminum is thick (100 to 500 μm), so scratches,
It is possible to obtain a rolled material with uniform thickness that is not easily affected by aging, etc., and allows the use of rolled material.

G [Example] The present invention will be described in detail below based on the drawings.

In Figure 1, the primary X-ray 3 emitted from the xM generator 1
reaches the base material iron 6. [Ironwork] The generated fluorescent X-rays 4 are attenuated by the filter material aluminum 5 and enter the detector 2.

In this example, the magnetic coating is made of iron oxide, and iron is used as the base material of the calibration sample. Figure 2 shows a normal measurement and conventional example, in which 1 is output from the xsg generator 7.
The X-rays 9 then irradiate the magnetic coating 11, and the fluorescent X-rays 10 generated therefrom enter the detector '8.

By appropriately selecting the thickness of the aluminum 5 shown in FIG. 1, the intensity of the fluorescent X-rays 4 becomes almost the same as that of the fluorescent X-rays 10 shown in FIG. 2, and can be used as a calibration sample.

H [Effects of the Present Invention] The calibration sample according to the present invention has the advantage of being easy to prepare, having good accuracy, and being less likely to be damaged.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a calibration sample according to the present invention, Figure 2 is a cross-sectional view of a calibration sample according to the present invention;
The figure is a cross-sectional view of a conventional calibration sample.

Claims (2)

[Claims] (1) The components in the coating material to be measured are used as the base material,
A sample for calibrating an X-ray magnetic film measuring device with an aluminum plate pasted on top. (2) A sample for calibrating an X-ray magnetic coating measuring device according to claim 1, wherein the base material is iron, cobalt, or chromium.