JPS58135689A - Atom beam generation furnace - Google Patents

Abstract

PURPOSE:To secure a space by preventing the close contact of a seal breaking diaphragm and thus ensure the outflow of atom beam generating material, by providing a spacer on the bottom surface of an ampule wherein the atom beam generating material is sealed. CONSTITUTION:When breaking the seal of the ampule 9 wherein an atom beam generating material 8 is sealed, the diaphragm 16 is pressed, and thus a needle 15 mounted on the diaphragm breaks through a thin film 14 at the bottom part of the ampule 9 resulting in the outflow of the atom generating material 8 inside the ampule. The diaphragm 16 is obstructed by the spacer 18 and does not contact on the bottom part of the ampule 9. Therefore, the diaphragm 16 does not contact close on the bottom part of the ampule 9 and does not prevent the outflow of the atom generating material 8. The spacer 18 is in a form without joints except for a ring.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an 111CIL of an atomic beam generator used in an atomic beam tube.

An atomic standard using an atomic beam tube controls and locks the conversion signal of an oscillation source such as a crystal oscillator to the resonance center of the atomic resonance characteristic of the atomic beam tube, and is independent of fluctuations and deviations in the oscillation frequency of the oscillation source. High stability oscillator for long term A@
It is something that becomes. The atomic beam tube used for this atomic standard is as shown in Fig.
A deflection magnet S1 and an ionizer detector 6 are arranged in sequence. As shown in FIG. 2, the atomic beam generating reactor 2 includes a cylindrical metal container 7, an ampoule 9 in which an atomic beam generating material 8 is sealed, a mesh &10 surrounding the ampoule, and a heating chamber 11. It is composed of a collimator 13 that collimates the atomic beam lz to be emitted, and a diaphragm 16 having a needle 15 provided opposite to the thin film 14 provided at the bottom of the ampoule 9. A more manipulable bellows 17 presses against the diaphragm 16, and its needle 15 releases the ampoule 9.
The thin film 14 is destroyed and the atomic beam generating material 8 is guided as shown by the arrow through the mesh 1G to the heating chamber 11, where the atomic beam generating material is evaporated and the atomic beam 12 is emitted from the cotmeter 13. This is what I did.

In an atomic beam generating reactor with such a mechanical interlocking mechanism, the diamond 7 ram 16 is assembled by brazing.
is thermally affected and enters a so-called annealed state, where the elastic limit is significantly lowered. Therefore, when the ampoule 9 is unsealed by the bellows 17, even if the bellows 17 is returned to its original position, the diaphragm 16 does not return to its original state and remains in close contact with the bottom of the ampoule 9, as shown in Fig. 3, and the atomic beam generating material 8 inside the ampoule 9 is It may become impossible to drain. The present invention has been devised to overcome this drawback.

Therefore, the atomic beam generation reactor of the present invention is equipped with an ampoule in which an atomic beam generation material is sealed and whose bottom part is a thin film, and a diaphragm having a needle for unsealing the wrinkled ampoule. This is an atomic beam generating reactor disposed in an atomic beam tube, characterized in that a spacer is provided on the bottom of the ampoule facing the diaphragm.

Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 4 shows a longitudinal sectional view of this embodiment, and FIG. 5 shows a sectional view taken along the line V-V@ in FIG. 4. In the figure, the same parts as in FIG. 2 are designated by the same symbols. ◎Therefore, the code 7 is the metal container, 9 is the ampoule in which the atomic beam generation material 8 is sealed, 10 is the mesh surrounding it, 14 16 is a thin film provided at the bottom of the ampoule, and 16 is a diaphragm having a needle 15. Reference numeral 18 denotes a spacer, which is the key point of the present invention, and is provided on the bottom surface of the ampoule 9, that is, the surface facing the diaphragm 16.

In this embodiment configured as described above, when the ampoule 9 is opened, the diaphragm 16 is pressed, and the needle 15 attached to the diaphragm touches the thin l[14] at the bottom of the ampoule 9, as shown in FIG. The atom generating material 8 inside is pierced and allowed to flow out. At this time, the diaphragm 16 is connected to the spacer 1
8 and does not touch the bottom of the ampoule 9. Therefore, the diaphragm 16 does not come into close contact with the bottom of the ampoule 9 and does not prevent the atom generation material 8 from flowing out.

)・The spacer 18 must have a shape other than a seamless ring.

As explained above, the atomic beam generating reactor of the present invention prevents the diaphragm for opening the seal from coming into close contact with each other by providing a spacer on the bottom of the ampoule containing the atomic beam generating material, thereby securing a gap between the ampule and the atomic beam generating material. This ensured that there was no leakage.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of an atomic beam tube, Fig. 2 is a cross-sectional view of a conventional example of the atomic beam generation reactor, and Fig. g3 is a cross-sectional view showing an unsealed state of the ampoule containing the atom generation material. FIG. 4 is a longitudinal sectional view of the atomic beam generator according to the embodiment of the present invention, FIG. 5 is a sectional view taken along V-VS of FIG. FIG. 7... Metal container, 8... Atomic beam generation material, 9
... Ampoule, 10... MEC 1.11... Heating chamber, 13... Collimator, 14... Thin film, 15...
・Needle, 16...Diaphragm, 18...Spacer. Figure 1 21! I Figure 3 Figure 5rIA 3JS4 Figure V Figure 16

Claims (1)

[Claims] L Comprising an ampoule in which an atomic beam generation material is sealed and a part of the bottom of which is a thin film, and a diaphragm having a needle as part of the ampoule, the ampoule is placed in an atomic beam tube. An atomic beam generating reactor according to 4111, in which a spacer is provided on the bottom surface of the ampoule facing the diaphragm.