JP2772121B2 - Ornamental plasma equipment - Google Patents

Description

The present invention relates to an ornamental plasma device. Such an apparatus can also be used for basic education of plasma phenomena in a technical field using plasma, such as a thin film manufacturing apparatus, a nuclear power measurement instrument, and a lighting apparatus.

[Conventional technology]

A conventional ornamental plasma device is, as shown in FIG.
By supplying a high-voltage current generated by a plasma generation power supply 5 through an electrode introduction port 4 to a conductive film 2 serving as an electrode provided in an internal cavity 6 of the closed glass container 1, the plasma 3 enters the glass container 1. Is caused to occur. At this time, it is necessary to generate a special current having a frequency of about several tens of kHz from the plasma generation power supply 5, and the generated plasma 3 has no change in shape and color and is monotonous. Despite its complexity, it was unsatisfactory as an ornamental device.

[Problems to be solved by the invention]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and has an ornamental plasma capable of exhibiting an ornamental effect by causing the plasma to perform various movements and changing to a desired color. It is intended to provide a device.

[Means for solving the problem]

To this end, the present invention includes a transparent vacuum vessel and a plasma generation electrode disposed inside the vacuum vessel, and a plasma generation power supply capable of supplying a plasma generation current to the plasma generation electrode. A magnetic field generator capable of changing the distribution of lines of magnetic force applied to the plasma generated inside the vacuum vessel by a change in the supplied current is provided, and the inside of the vacuum vessel is changed to change the plasma to a desired color. Is provided with a gas supply device capable of supplying one or more kinds of gases.

[Action]

In the ornamental plasma device of the present invention, the plasma inside the vacuum vessel is transparent, so that the plasma inside can be seen well, and the plasma can be easily appreciated. Further, when the distribution of the magnetic field (lines of magnetic force) is changed by changing the current of the magnetic field generator, the radius of gyration and density distribution of the cyclotron motion of the electrons due to the action of the lines of magnetic force change, and as a result, the plasma moves. In other words, high vacuum (10
A plasma generated at about ^-4 Torr) applies a magnetic field of about 100 Gauss and changes its distribution (magnetic field distribution), thereby causing a phenomenon of moving the plasma itself. Furthermore, when supplying gas from the gas supply device, a plurality of gas lines are individually provided with a needle valve and a shutoff valve,
By switching the type of gas supplied to the vacuum vessel by opening and closing the shut-off valve while keeping the needle valve constant at all times, the plasma can be changed to a desired color by the emission spectrum unique to each gas.

〔Example〕

An embodiment of the ornamental plasma apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a basic first embodiment, FIG. 2 shows a second embodiment, and FIG. 3 (B) is a perspective view of the procedure for watching generated plasma, FIGS. 3 and 4 show a third embodiment, FIG. 3 is a schematic perspective view of one set, and FIG. It is a perspective view of a multi-set combination.

First, in FIG. 1 of the basic first embodiment, a transparent vacuum vessel 11 is used so that generated plasma can be easily seen, and a plasma generating electrode 13a provided inside the transparent vacuum vessel 11 is supplied from a plasma generating power supply 13 to the transparent vacuum vessel 11. A high voltage is supplied to generate plasma. A magnetic field generating coil 14a is provided inside or outside of the transparent vacuum vessel 11, and power is supplied to the magnetic field generating coil 14a from a magnetic field generating power supply 14, and the current at that time is changed, so that the magnetic field distribution applied to the plasma is changed. Is adjusted,
This makes it possible to move the plasma. In addition, a gas can be supplied from the gas supply device 15 into the transparent vacuum vessel 11, so that a desired color of plasma can be obtained depending on the type of gas. The inside of the transparent vacuum vessel 11 is evacuated to a vacuum by the vacuum exhaust device 12 for plasma generation and further smooth gas exchange.

Next, in FIG. 2A of the second embodiment, the inside of the glass vacuum vessel 21 is evacuated to a vacuum using a vacuum pump 22 communicating with the metal bottom plate 21a. A gas such as N ₂ or Ar is injected from the gas supply device 25 therein, and the inside of the glass vacuum vessel 21 is maintained at a predetermined pressure by the balance between the gas flow rate and the pumping speed.

When reproducing a pseudo aurora, the pressure is set to about 10 ⁻³ Torr, and for plasma having strong light emission, the pressure is set to about 1 to 0.1 Torr.

At this time, when a high voltage of 10 to 15 kV is applied between the anode electrode 23a and the metal bottom plate 21a and the cathode electrode 23b by the AC high-voltage power supply 23, plasma is generated in the glass vacuum vessel 21. Therefore, a magnetic field generating coil 24
When a magnetic field modulated by a is applied, the plasma moves.
In this way, an ornamental plasma generator applicable to an aurora simulator or the like can be realized.

FIG. 2 (B) shows the manner of viewing the generated plasma. By using a concave mirror 27 as the plasma 26 in the glass vacuum vessel 21 and making it an enlarged plasma 28 reflected on the mirror surface, the plasma 26 can be seen effectively.

Further, in FIG. 3 of the third embodiment, a metal bottom plate 31a and a metal top plate 31b are attached to the tubular glass vacuum vessel 31,
The plasma generation electrode 33a is housed inside. Inside the mount 38 on which the metal bottom plate 31a is mounted, there are vacuum evacuation devices 32,
A plasma power supply 33, a magnetic field generation power supply 34, and a gas supply device 35 are housed.

FIG. 4 shows an apparatus in which the apparatus shown in FIG. 3 is combined into a multi-set as one set. A plurality of glass vacuum containers 31 are arranged on a ring-shaped base 38, and a cylindrical mirror or a picture 37, a plurality of magnetic field generating coils 34a are further provided outside. In this device, the glass vacuum vessel 31 is separated but the magnetic field is continuous,
The plasma 36 moves together as a whole, and a large-sized apparatus is possible.

〔The invention's effect〕

As described above, according to the present invention, the following effects can be obtained.

(1) The plasma can be moved by controlling the current supplied to the magnetic field generator to change the distribution of the magnetic field applied to the plasma.

(2) A plasma of a desired color can be obtained by selecting the type of gas supplied to the inside of the vacuum vessel.

(3) According to the above (1) and (2), ornamental plasma can be effectively generated.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a basic first embodiment of an ornamental plasma device of the present invention, FIG. 2 is a schematic diagram of the second embodiment, and FIG. 1A is a schematic diagram of the entire device. B) is a perspective view of the procedure for viewing generated plasma, FIGS. 3 and 4 show the third embodiment, FIG. 3 is a schematic perspective view of one set, and FIG. 4 is a perspective view of a multi-set combination. FIG. FIG. 5 is a schematic view of a conventional plasma device. 11 ... Transparent vacuum container, 12 ... Vacuum exhaust device, 13 ... Power supply for plasma generation, 13a ... Plasma generation electrode, 14 ... Magnetic power supply, 14a ... Magnetic generation coil, 15 ... Gas supply device, 21 …… Vacuum container, 21a …… Metal bottom plate, 22…
... Vacuum pump, 23 ... AC high voltage power supply, 23a ... Anode electrode, 23b ... Cathode electrode, 24a ... Magnetic field generating coil,
25 ... gas supply device, 26 ... plasma, 27 ... concave mirror,
28 …… Enlarged plasma reflected on the mirror surface, 31 …… Glass vacuum vessel, 31a …… Metal bottom plate, 31b …… Metal top plate, 32 …… Vacuum exhaust device, 33 …… Plasma power supply, 33a …… Plasma generating electrode, 34 ... magnetic field generating power supply, 34a ... magnetic field generating coil, 35
... gas supply device, 36 ... plasma, 37 ... mirror or painting, 38 ... stand.

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masayoshi Murata 1-1, Akunouramachi, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Research Laboratory (58) Field surveyed (Int.Cl. ⁶ , DB name) H05H 1 / 00 G09B 23/18

Claims (1)

(57) [Claims] 1. An ornamental plasma apparatus comprising: a transparent vacuum vessel; a plasma generating electrode disposed inside the vacuum vessel; and a plasma generating power supply capable of supplying a plasma generating current to the plasma generating electrode. A magnetic field generator capable of changing the distribution of lines of magnetic force applied to the plasma generated inside the vacuum vessel by a change in the supplied current, and the vacuum to change the plasma to a desired color. An ornamental plasma device, wherein a gas supply device capable of supplying one or more types of gas is provided inside the container.