JPS6041A - X-ray tube - 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 [Inquiry into SL version Jr.] The present invention relates to an Xm tube that effectively prevents the Vc voltage from decreasing during use and the withstand voltage from deteriorating.

[Background of light]

Figure 1 shows an example of a conventional X9i system. In the figure,
1 & 1゛d easy, 2 is the target, 3 is the 1st pole, now is the focused sleep, 5 is the cylinder, 6 is the stem, 7 is the pulse ivy, 8μ getter heating lead, 9 is the filament and getter common lead, 10 is A filament lead, 11 is a filament, and 12 is an envelope.

In such a conventional X-ray tube, during 'IJP air and aging, the bulk getter is heated to an appropriate temperature and activated by following the lead 8.9 to perform gas absorption. However, the getter heating lead 8 was cut off after the aging process was completed, and when the X-ray tube was actually used, the bulk getter was used for one cycle at a temperature close to the top width. When the bulk getter is used once at room temperature, a gas passes through near the surface.
When I wear it, my ft1 friends almost no longer have a getter effect. On the other hand, the larger size is the inner end, and during actual use, C
2L of gas is gradually released. Therefore λ
+? After the ureter enters its period of actual use, as described in 1JiJ, after the bulk getter passes through the figuratively short grains where the getter action is effective near the narrow surface, the urinary tube A and 1 gradually decrease due to the gas release. However, there was a problem in that the withstand voltage decreased, and the life span was ended due to a fatal accident caused by the product being left unused for a long time.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an X-ray tube in which the bulk getter continues to function effectively even after the tube has entered the period of actual use.

[Description of invention]

In order to achieve the above object, the present invention has a built-in heater and connects the bulk getter in parallel with the filament of the X-ray tube, so that during actual use, the bulk getter heater is always connected simultaneously to the filament. By raising the temperature of the bulk getter, the bulk getter was able to effectively perform the getter action. Furthermore, the getter temperature i
In some cases, the heating conditions of the heat heater to exert a getter action on the K*-effect do not match the pressure of the filament, so in that case, the heating conditions for the heat heater and the phantom filament or heat heater may be used. Connect a resistor to the filament and perform a test so that the getter's I'x71 degrees or an appropriate value is obtained with the filament's current test voltage.

In this case, the resistor in series with the filament or the heater can be sealed inside the tube as long as it is made of a suitable material and placed at an appropriate position, but as mentioned above, the resistor in the tube (other than the getter) Anything whose surface is exposed to the inner part may cause gas release dρ, so it is generally better not to place it outside 3u.

There is no problem with the resistance material or its treatment when placed outside the tube, and the resistance value can be adjusted if desired.

[Embodiments of the invention]

FIG. 2 is an embodiment of a connection state diagram of a bulk getter heater and a series resistor according to the present invention.

In the figure, 6 is a stem, l is a bulk getter, 8 is a getter heating lead, 9 is a common lead for the filament and getter, 10 is a filament lead, 11 is a filament), 12 is pulp, and 21 is a resistor. Connect the resistor 21 in series to the getter heating lead 8 of the tube shown in Fig. 1 without cutting any part of the exhaust or aging tube (filament).
II and connect in parallel to the filament) l L l'/)
The resistance value of the resistor 21 is tuned so that the bulk getter 7 is heated to a temperature of 12 suitable for getter action at a pressure of 1. As a result, while the X-ray tube II is being heated, the bulk getter 7 is also heated to a temperature of 7'', and the entire volume of the bulk getter is effectively utilized as a getter. Prevents low nitrogen content by adsorbing the emitted gas.

In addition, in FIG. 2, the bulk getter 7 has a getter action, and the heating of the filament 11 of the bulk getter 7 is shown in FIG.
4 When the pressure is low, a resistor 21 is connected to the filament 11 as shown in FIG.

〔Effect of the invention〕

If you explain the above and take a look at the book 9G, you can make effective use of the bulk getter's Otani, and it will be emitted during the operation of the X-ray tube! The effect of this is that it allows the gas to be easily discharged in a long-term suction layer, prevents a decrease in wall thickness in the inlet pipe, prevents a small number from occurring due to gun pressure resistance, and lengthens the length of the X-particle pipe. is obtained.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a conventional X-ray tube, and FIG. 2 is a diagram showing an embodiment of the present invention. , 6 heaters, series resistors, etc., and FIG. 3 is a diagram showing the connection state of an actual example of oil. 3...Inshin, 7...Bulk Getter, 8...
Getter heating lead, 9... Filament and getter common lead, 10... Filament lead, 11...
...Filament, 21...Resistance. Second. Father Figure 3

Claims (1)

[Claims] 1. In an Xm tube in which a bulk getter with a heater is enclosed, a self-heating heater is connected in parallel with the filament of the X-ray tube, and a torsion is connected in series with the heater or the filament. An X-tube that is characterized by inserting it and checking the degree of getter's play. 2. The heater or the resistor inserted in series with the filament is located outside the chamber.