JPH0613031A - Electrode of discharge tube having passing hole of high speed charged particle - Google Patents

Abstract

PURPOSE:To repeat a long-time and high-voltage large capacity intermittent discharge by providing, on a part of an electrode, a hole through which most of high-speed charged particles are passed without colliding with the electrode. CONSTITUTION:When a discharge stimulation of about 6000 V is given through a negative electrode 2 and a lead 7 connected to trigger electrodes 6a, 6b, cations of xenon gas are generated in a discharge tube, and the cations receive the force of the electric field formed between positive electrodes 3a, 3b and the negative electrode 2. Since the cations are acceleratively advanced toward the negative electrode 2 and increased in speed, thus, an extremely large quantity of cations of xenon are acceleratively advanced toward the negative electrode 2 and enhanced in speed. When the negative electrode 2 has a ring form, however, the cations of xenon directed to the center part of the negative electrode 2 are passed through a hole without colliding with the negative electrode 2, rushed into the electric field reversed to the advancing direction on the opposite side to the negative electrode 2, in which the cations 2 receive the force of the electric field, and are suddenly decelerated. Thus, heat generation is minimized, and a long-time and high-voltage large capacity intermittent discharge can be repeated.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] It is used for electrodes of high-voltage and large-capacity discharge tubes, especially when used for electrodes of high-voltage, large-capacity intermittent DC discharge strobe tubes, the electrodes are less likely to be heated As a long life.

[0002]

2. Description of the Related Art Since the conventional electrodes in a discharge tube are not provided with holes through which high-velocity charged particles pass, many high-velocity charged particles collide with the electrodes and a large amount of heat is generated at the electrodes. is doing.

[0003]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention In a discharge tube using a conventional electrode which is not provided with a hole through which fast charged particles pass, when a large-capacity intermittent discharge is repeatedly performed at a high voltage for a long time, the electrode is Due to the large amount of heat generated by the collision of many fast charged particles, the electrode melts or a part of the electrode scatters and adheres to the inner part of the glass of the discharge tube, contributing to blackening of the glass tube. . In addition, the glass tube may be damaged due to the difference in thermal expansion between the electrode and the glass, or part of the transparent glass that has received heat from the electrode heated to high temperature or collision of charged particles may change its structure and become cloudy. is there. For these reasons, a discharge tube capable of repeating high voltage, large capacity intermittent discharge for a long time could not be obtained.

[0004]

In a discharge tube using an electrode in which a large number of fast charged particles collide with the electrode and a large amount of heat is generated, a high voltage / large capacity intermittent discharge is repeated for a long time. I can't. Therefore, it is sufficient to use an electrode provided with a part of the electrode through which most of the fast charged particles pass without colliding with the electrode.

[0005]

The charged particles accelerated by a high voltage have a strong inertia of rectilinear motion with increasing speed. Therefore, when a large number of high-speed charged particles face the electrode with a large hole in the center, the majority of high-speed charged particles pass through the hole in the center of the electrode, reducing the number of charged particles that collide with the electrode. However, heat generation at the electrodes is also reduced.

[0006]

EXAMPLE FIG. 1 is a plan view of a strobe discharge tube containing xenon gas using the electrode of the present invention as a cathode, and FIG. 2 is a central longitudinal side view. 1a and 1b are transparent glass parts of the discharge tube, 2 is a ring-shaped cathode of the present invention, and 3a and 3b are anodes. 4,5, 5a, 5b are lead wires, voltage 10
It is connected to the cathode and anode of a capacitor charged by a DC power source of 00 [V]. 6a and 6b are Triger electrodes, and 7 is a lead wire thereof. The electric field in the discharge tube is formed from the anodes 3a and 3b toward the cathode 2 in the glass tube. When a discharge stimulus of about 6000 [V] is applied through the lead wire 7 connected to the cathode 2 and the Triger electrode 6, cations of xenon gas are generated in this discharge tube, and the cations are the anodes 3a and 3b and the cathode. Under the influence of the electric field formed between the cathode and the cathode 2, the cathode 2 accelerates and accelerates to a high speed. The electric charge that was charged in the capacitor by the stimulation discharge of this Triger,
It is instantly discharged through xenon gas. Therefore, a large number of xenon cations are accelerated toward the cathode 2 all at once, and the speed is increased. If the cathode 2 has a disk shape instead of the ring shape as shown in the figure, the cathode plate will generate heat due to collision of a large amount of high-speed xenon gas.
Even when flashing at 60 [Hz], which has a relatively small number of blinks, if this is repeated for a long time and the heat generated is larger than the heat radiated to the outside of the entire flash tube, the cathode plate may melt. . In the case of the ring-shaped cathode 2 as shown in the figure, the xenon cations directed to the central portion of the cathode 2 pass through the hole without colliding with the cathode 2 and are directed in the opposite direction to the traveling direction on the opposite side of the cathode. It rushes into the electric field, and receives the force of the electric field to rapidly decelerate. Since the electrode 2 does not receive many collisions of xenon gas, heat generation is reduced and a large-capacity intermittent discharge of high voltage for a long time becomes possible.

[0007]

As compared with the disk-shaped cathode 2, the ring-shaped cathode 2 of the present invention produces very little heat and can be intermittently discharged for a long time and with a large capacity. Became.

[Brief description of drawings]

FIG. 1 is a plan view of a discharge tube including a cathode of the present invention.

FIG. 2 is likewise a side view of the central longitudinal section.

[Explanation of symbols]

 1a, 1b Glass part of discharge tube 2 Cathode 3a, 3b Anode of the present invention 4 Lead wire for cathode 5, 5a, 5b Lead wire for anode 6a, 6b Triger electrode 7 Lead wire for Triger electrode

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[Procedure amendment]

[Submission date] August 20, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

[0006]

EXAMPLE FIG. 1 is a plan view of a strobe discharge tube containing xenon gas using the electrode of the present invention as a cathode, and FIG. 2 is a central longitudinal side view. 1a and 1b are transparent glass parts of the discharge tube, 2 is a ring-shaped cathode of the present invention, and 3a and 3b are anodes. 4,5, 5a, 5b are lead wires, voltage 10
It is connected to the cathode and anode of a capacitor charged by a DC power source of 00 [V]. 6a and 6b are Triger electrodes, and 7 is a lead wire thereof. The electric field in the discharge tube is formed from the anodes 3a and 3b toward the cathode 2 in the glass tube. When a discharge stimulus of about 6000 [V] is applied through the lead wire 7 connected to the cathode 2 and the Triger electrode 6, cations of xenon gas are generated in this discharge tube, and the cations are the anodes 3a and 3b and the cathode. Under the influence of the electric field formed between the cathode and the cathode 2, the cathode 2 accelerates and accelerates to a high speed. The electric charge that was charged in the capacitor by the stimulation discharge of this Triger,
It is instantly discharged through xenon gas. Therefore, a large number of xenon cations are accelerated toward the cathode 2 all at once, and the speed is increased. If the cathode 2 has a disk shape instead of the ring shape as shown in the figure, the cathode plate will generate heat due to collision of a large amount of high-speed xenon gas.
Even when flashing at 60 [Hz], which has a relatively small number of blinks, if this is repeated for a long time and the heat generated is larger than the heat radiated to the outside of the entire flash tube, the cathode plate may melt. . In the case of the ring-shaped cathode 2 as shown in the figure, the xenon cations directed to the central portion of the cathode 2 pass through the hole without colliding with the cathode 2 and are directed in the opposite direction to the traveling direction on the opposite side of the cathode. It rushes into the electric field, and receives the force of the electric field to rapidly decelerate. Since the electrode 2 does not receive many collisions of xenon gas, heat generation is reduced and a large-capacity intermittent discharge of high voltage for a long time becomes possible.

Claims (1)

[Claims] 1. A structure of an electrode provided with a hole through which fast charged particles can pass without colliding with the electrode in a discharge tube.