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WO2002049073A1 - Tube a decharge gazeuse - Google Patents

Tube a decharge gazeuse Download PDF

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Publication number
WO2002049073A1
WO2002049073A1 PCT/JP2001/010943 JP0110943W WO0249073A1 WO 2002049073 A1 WO2002049073 A1 WO 2002049073A1 JP 0110943 W JP0110943 W JP 0110943W WO 0249073 A1 WO0249073 A1 WO 0249073A1
Authority
WO
WIPO (PCT)
Prior art keywords
heater
indirectly heated
electrically connected
metal oxide
gas discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2001/010943
Other languages
English (en)
Japanese (ja)
Inventor
Koji Kawai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hamamatsu Photonics KK
Original Assignee
Hamamatsu Photonics KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hamamatsu Photonics KK filed Critical Hamamatsu Photonics KK
Priority to AU2002222636A priority Critical patent/AU2002222636A1/en
Priority to JP2002550289A priority patent/JPWO2002049073A1/ja
Publication of WO2002049073A1 publication Critical patent/WO2002049073A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/24—Insulating layer or body located between heater and emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens
    • H01J17/06—Cathodes
    • H01J17/063—Indirectly heated cathodes, e.g. by the discharge itself

Definitions

  • the present invention relates to a gas discharge tube.
  • the indirectly heated electrode disclosed in Japanese Patent Publication No. 56266/28 has a structure in which a double coil is wound around the outer wall of a thermally conductive cylinder a plurality of turns and tightly fixed, and a paste-like electrode material is doubled. It is formed by applying a uniform electrode surface on the surface of the cylinder by applying it inside the primary spiral of the coil and between the secondary spirals, and by providing a heater inside the cylinder.
  • the gas discharge tube using the indirectly heated electrode includes a tubular container in which gas is hermetically sealed, and a pair of introduction wires respectively sealed at both ends of the container.
  • An object of the present invention is to provide a gas discharge tube capable of reducing the diameter of a tubular container for hermetically sealing a gas when an indirectly heated electrode is used.
  • a gas discharge tube according to the present invention includes a tubular container in which gas is hermetically sealed, and an indirectly heated electrode attached to a distal end of a pair of introduction wires respectively sealed at both ends of the container.
  • each of the indirectly heated electrodes has one end electrically connected to one of the pair of introduction wires, and the other end electrically connected to the other end of the heater.
  • an electron emission portion that is electrically connected to the other of the pair of introduction wires and receives heat from the heating heater to emit electrons, and includes a heating heater and an electron emission portion. Since the heater is mounted with the electrically connected portion facing the discharge space, the heater for heating extends in the tube axis direction of the container.
  • the current (heater current) flowing through the heating heater during preheating passes through the electron emission section and reaches the other of the introduction wires, and it is necessary to directly connect each end of the heating heater to the introduction wire. There is no.
  • the indirectly heated electrode is used as the electrode of the gas discharge tube, the diameter of the tubular container for hermetically sealing the gas can be reduced.
  • the other end of the heater for heating and the electron emitting section are electrically connected by a connecting pin.
  • the connecting pin since the other end of the caro-heater and the electron emitting portion are electrically connected by the connecting pin, the electrical connection between the heating heater and the electron emitting portion can be reliably performed. Can be realized simply and at low cost.
  • a metal oxide as an electron emitting material is provided at the other end of the heater for heating.
  • the metal oxide as the electron-emitting material is provided at the other end of the caro heater, so that thermionic emission from the metal oxide provided at the other end of the heater during preheating is achieved. As a result, a preliminary discharge occurs. As a result, the startability of the gas discharge tube can be improved.
  • FIG. 1 is a schematic sectional view showing a gas discharge tube according to the first embodiment.
  • FIG. 2 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the first embodiment.
  • FIG. 3 is a schematic diagram showing a discharge state in the gas discharge tube according to the first embodiment.
  • FIG. 4 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the second embodiment.
  • FIG. 5 is a schematic perspective view showing an indirectly heated electrode included in the gas discharge tube according to the second embodiment.
  • FIG. 6 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the third embodiment.
  • FIG. 7 is a schematic perspective view showing an indirectly heated electrode included in the gas discharge tube according to the third embodiment.
  • FIG. 8 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the fourth embodiment.
  • FIG. 9 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the fifth embodiment.
  • FIG. 1 is a schematic sectional view showing a gas discharge tube according to the first embodiment
  • FIG. 2 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the first embodiment. .
  • the gas discharge tube DT includes a glass bulb 1 as a tubular container, a pair of introduction wires (introduction pins) 3 and 5 respectively sealed at both ends of the glass bulb 1, and a pair of An indirectly heated electrode 11 is provided at the tip of each of the introduction wires 3 and 5.
  • the outer diameter of the glass bulb 1 is set to, for example, about 2 O mm.
  • Gala A rare gas such as argon, or a rare gas such as argon and mercury are hermetically sealed inside the valve 1.
  • a cutout 7 from the exhaust pipe is formed in the middle of the glass bulb 1.
  • a discharge space s is formed between the indirectly heated electrodes 11.
  • the indirectly heated electrode 11 includes a heating heater 13 and a base metal 1.
  • the heating heater 13 is composed of a filament coil in which a tungsten wire having a diameter of 0.03 to 0.1 mm, for example, 0.07 m; m, is double-wound.
  • An electric insulating material for example, alumina, zirconia, magnesia, silica, etc.
  • One end 13 a of the heater 13 is electrically connected to one of the pair of lead wires 3 and 5 by welding or the like.
  • the base metal 15 is formed in a cylindrical shape and has conductivity.
  • the base metal 15 is made of, for example, molybdenum or the like.
  • a heating heater 13 is inserted and disposed inside the base metal 15.
  • the base metal 15 is electrically connected to the other of the pair of lead wires 3 and 5 by welding or the like.
  • the base metal 15 is electrically connected to the other end 13b of the heater 13 via the connecting pin 21 by welding or the like.
  • the connection pin 21 is made of a conductive metal such as Kovar or nickel.
  • the electron emitting section 17 emits electrons by receiving heat from the heater 13 and includes a double coil 18 and a metal oxide 19 as an electron emitting material.
  • the double coiler 18 is a multi-layer coil composed of coils wound in a coil shape.
  • a tungsten element with a diameter of 0.09 lmm is formed into a primary coil with a diameter of 0.25 mm and a pitch of 0.146 mm.
  • the primary coil is used to form a double coil with a diameter of 1.7 mm and an N pitch of 0.6 m; m.
  • the double coil 18 has a mandrel 18a.
  • Mandrenore is a filament coinole A core wire that plays the role of a mold that determines the winding diameter at the time of creation.
  • molybdenum is used as a material for the mandrenole.
  • the double coil 18 is wound and fixed on the outer surface of the base metal 15 a plurality of times, and the double coil 18 and the base metal 15 are electrically connected.
  • the electron emitting portion 17 double coil 18, metal oxide 19
  • the base metal 15 has a function of isolating the metal oxide 19 as the electron-emitting material from the electric insulating layer 14 formed on the heater 13.
  • the metal oxide 19 is held in the double coil 18.
  • the surface of the double coil 18 and the metal oxide 19 are exposed outside the indirectly heated electrode 11 so that the surface of the metal oxide 19 and the surface of the double coil 18 become the discharge surface.
  • the surface of the double oxide 18 comes into contact with the surface of the metal oxide 19.
  • Examples of the metal oxide 19 include oxides of any one of barium (Ba), strontium (Sr), and calcium (Ca), a mixture of these oxides,
  • the main constituent element is barium, strontium, or calcium alone, or a mixture of these oxides, and the sub constituent element is a rare earth metal containing lanthanum (IIIa in the periodic table).
  • An oxide is used. Norium, strontium, and calcium have small work functions, can easily emit thermoelectrons, and can increase the supply of thermoelectrons. Further, when a rare earth metal (Ilia in the periodic table) is added as a sub-component, the supply of thermionic electrons can be further increased and the sputter resistance can be improved.
  • the metal oxide 19 is applied in the form of a metal carbonate (for example, barium carbonate, strontium carbonate, calcium carbonate, or the like) as an electrode material, and is obtained by subjecting the applied metal carbonate to vacuum thermal decomposition.
  • a metal carbonate for example, barium carbonate, strontium carbonate, calcium carbonate, or the like
  • vacuum thermal decomposition is performed by energizing the heating heater
  • AC thermal decomposition is preferable to DC thermal decomposition.
  • the metal oxide 19 obtained in this manner finally becomes an electron emitting material.
  • Electrode material The metal carbonate as a material is applied from the outside of the double coil 18 in a state where the double coil 18 is wound around the outer surface of the base metal 15 a plurality of times and fixed.
  • each of the indirectly heated electrodes 11 having the above-described configuration has a heating heater 13 and an electron emitting portion 17 (double coil 18, metal oxide 19) electrically connected to each other.
  • an electron emitting portion 17 double coil 18, metal oxide 19
  • FIG. 3 is a schematic diagram showing a discharge state in the gas discharge tube according to the first embodiment.
  • the discharge path R is hatched for explanation.
  • “x” in FIG. 3 indicates an electron emitted from the indirectly heated electrode 11.
  • each of the indirectly heated electrodes 11 has one end 13 a having one of the introduction lines 3, 5.
  • the heating heater 13 electrically connected to the other end of the heating heater 13 electrically connected to the other end 13 b of the heating heater 13 and the other of the pair of introduction wires 3 and 5
  • an electron emitting section 17 double coil 18, metal oxide 19 electrically connected to 5 and emitting electrons by receiving heat from the heater 13.
  • the part where the heater 13 and the electron radiating part 17 are electrically connected (the other end 13 b of the heating heater 13 and the connecting pin 21) is mounted with the part facing the discharge space S. Therefore, the heating heater 13 is disposed such that its axis and line extend in the tube axis direction of the glass bulb 1.
  • the current flowing through the heater 13 during preheating (heater current), the connecting pin 21, the base metal 15, and the electron emitting portion 17 (double coil; 118, metal oxide 19) It passes through to the inlet Kayasen 5, so that it is not necessary to directly connect the ends 13a, 13b of the heater 13 with the inlet lines 3, 5.
  • the indirectly heated electrode 11 is used as the electrode of the gas discharge tube DT, the diameter of the glass bulb 1 can be reduced.
  • the other end 13 b of the heating heater 13 and the electron emitting portion 17 are electrically connected by the connecting pin 21. Since they are connected, it is possible to easily and at low cost realize a configuration capable of reliably performing electrical connection between the heating heater 13 and the electron emitting section 17.
  • the equipotential surface is effectively formed on the back surface (the surface opposite to the discharge surface) of the double coil 18, it is formed.
  • the discharge area increases, the amount of electron emission per unit area (electron emission density) increases, and the load at the discharge position is reduced.
  • Sputtering of the metal oxide 19, which is a deterioration factor, and stability (mineralization) due to oxidation with a reducing metal, that is, a decrease in thermionic emission ability can be suppressed.
  • generation of local discharge can be suppressed, and the life of the indirectly heated electrode 11 can be extended.
  • the movement of the discharge position is suppressed, stable discharge can be obtained for a long time.
  • the load is slightly increased by slightly increasing the current density in relation to the increase in the discharge area, that is, even if the discharge current is increased.
  • damage can be reduced as compared with conventional ones.
  • an indirectly heated electrode having a large discharge current and a shape substantially the same as that of the conventional one can be provided, and a pulse operation and a large current operation can be realized.
  • the indirectly heated electrode 11 of the first embodiment since the equipotential surface is formed effectively on the back surface of the double coil 18, the reduction of the thermionic emission capability and the discharge A configuration capable of suppressing the movement of the position can be realized at low cost and more easily.
  • the double coil 18 is Due to the presence of the barrel 18a, deformation of the double coil 18 during processing can be suppressed.
  • FIG. 4 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the second embodiment
  • FIG. 5 is a schematic perspective view showing the indirectly heated electrode similarly.
  • FIG. 5 omits illustration of the metal oxide 19 for explanation.
  • the gas discharge tube of the second embodiment includes a glass bulb 1 as a tubular container, and a pair of introduction wires (introduction pins) 3 sealed at both ends of the glass bulb 1, 5 and the indirectly heated electrode 3 attached to the tip of the pair of lead wires 3 and 5
  • the indirectly heated electrode 31 has a heater 13 for heating, an electron emitting portion 33, a linear member 37, and a connecting pin 21. I have.
  • the electron-emitting portion 33 emits electrons by receiving heat from the heater 13 and includes a double coil 35 and a metal oxide 19 as an electron-emitting material.
  • the double coil 35 is a multiplex coil composed of a coil wound in a coil shape.
  • the double coil 35 has a diameter of 0.25 mm, a pitch of 0.15 mm, and a pitch of 0.15 mm. It is formed in a 46 mm primary coil, and the primary coil is formed into a double coil with a diameter of 1.7 mm and a pitch of 0.6 mm.
  • a heater 13 for heating is inserted and arranged inside the double coil 35.
  • Linear member 3 7 rigid (metal conductor) having conductivity, belongs periodic table III a ⁇ VII a, Vin, the lb group, in particular tungsten, tantalum, molybdenum, Les two ⁇ beam, Single metals of high melting point metals (melting point of 100 ° C or more) such as niobium, osmium, iridium, iron, nickel, cobalt, titanium, zirconium, manganese, chromium, vanadium, rhodium, rare earth metals or alloys thereof Consists of Real truth
  • a linear member made of tungsten is used.
  • the diameter of the linear member 37 is set to about 0.1 mm.
  • the linear member 37 is disposed outside the double coil 35 over the longitudinal direction of the double coil 35 so as to be substantially orthogonal to the discharge direction. It is electrically connected to 37.
  • the number of the linear members 37 is not limited to two, but may be one, or three or more.
  • the linear member 37 is electrically connected to the other end 13 b of the heater 13 via the connecting pin 21.
  • the connecting pin 21 and the linear member 37 are connected by welding.
  • the other end 13 b of the heater 13 and the electron emitting portion 33 double coil 35, metal oxide 19
  • the connecting pin 21 and the linear member 37 It will be electrically connected via.
  • linear member 37 is electrically connected to the other introduction wire 5 of the pair of introduction wires 3 and 5 by welding or the like. Thereby, the introduction wire 5 and the electron emitting portion 33 are electrically connected via the linear member 37.
  • the metal oxide 19 is held by the double coil 35 and provided in contact with the linear member 37.
  • the metal oxide 19 and the linear member 37 are exposed outside the indirectly heated electrode 31 so that the surface of the metal oxide 19 and the surface of the linear member 37 become a discharge surface.
  • the linear member 37 comes into contact with the surface of the metal oxide 19.
  • the metal oxide 19 is made of a metal carbonate (for example, barium carbonate, strontium carbonate, calcium carbonate, etc.) as an electrode material, and a heating heater 13 is provided inside the double coil 35 and a double In a state where the linear member 37 is disposed outside the coil 35, the linear member 37 is applied from the side of the linear member 37, and the applied metal carbonate is provided by vacuum thermal decomposition. In the case where vacuum heating decomposition is performed by energizing the heating heater, AC heating decomposition is preferable to DC heating decomposition.
  • a metal carbonate as an anode material is applied to the double coil 35 (the linear member 37) in a state where the heater 13 is not provided inside the double coil 35, and the Thereafter, a heater 13 for heating may be inserted inside the double coil 35.
  • the reason why the heater 13 is inserted and disposed after the application of the metal carbonate is that if the electric insulating layer 14 formed in the heater 13 has small holes, the heater 13 When the metal carbonate is applied in the state where 13 is arranged, the applied metal carbonate enters the pores, and the metal oxide 19 obtained from the metal carbonate and the heater 13 are short-circuited. This is to avoid the situation.
  • each of the indirectly heated electrodes 31 having the above-described configuration is configured such that the heating heater 13 and the electron emitting portion 33 (double coil 35, metal oxide 19) are electrically connected.
  • the connected part that is, the other end 13 b of the heater 13 and the connecting pin 21 are directed toward the discharge space S (the other end 13 b of the heater 13 and the connecting pin 21 In a state where they face each other), they are attached to the lead wires 3 and 5 and arranged inside the glass bulb.
  • each of the indirectly heated electrodes 31 is connected to one end 13 a of one of the introduction lines 3 of the springs 3 and 5.
  • the heater 13 electrically connected to the heater 13, the other end 13 b of the heater 13 electrically connected to the heater 13, and the other lead 5 of the pair of lead 3, 5.
  • an electron emitting portion 33 double coil 35, metal oxide 19 which is electrically connected to and emits electrons by receiving heat from the heater 13 for heating.
  • the part where the heater 13 and the electron emission part 33 are electrically connected (the other end 13 b of the heating heater 13 and the connection pin 21) is mounted with the part facing the discharge space S. Therefore, the heater 13 is disposed so that its axial direction extends in the tube axis direction of the glass bulb 1.
  • the current flowing through the heater 13 during preheating (heater current) ⁇ passes through the connecting pin 21, the linear member 37, the electron emitting portion 3 3 (double coil 35, metal oxide 19).
  • the connecting pin 21 the other end 13 b of the heater 13 and the electron emitting portion 33 (the linear member 37) are electrically connected by the connecting pin 21. Since they are connected, it is possible to easily and at low cost realize a configuration capable of reliably performing electrical connection between the heating heater 13 and the electron emitting section 33.
  • the linear member 37 is provided in contact with the metal oxide 19, and the linear member 37 effectively forms an equipotential surface. Therefore, thermionic emission occurs in a wide area of the formed equipotential surface, so the discharge area increases, the amount of electron emission per unit area (electron emission density) increases, and the load at the discharge position increases.
  • the metal oxide 19, which is a deterioration factor is stabilized (sputtering), and the metal oxide 19 is stabilized (mineralized) by oxidation with a reduced metal, that is, a decrease in the ability to emit thermoelectrons can be suppressed.
  • the occurrence of local discharge can be suppressed, and the life of the indirectly heated electrode 11 can be extended.
  • a stable discharge can be obtained for a long time.
  • the current density is slightly increased and the load is slightly increased, that is, even if the discharge current is increased, in association with the increase in the discharge area.
  • damage can be reduced as compared with conventional ones.
  • an indirectly heated electrode having a large discharge current and a shape substantially the same as that of the conventional one can be provided, and a pulse operation and a large current operation can be realized.
  • the linear member 37 since the linear member 37 is used, an electric conductor having a configuration capable of suppressing a decrease in thermionic emission ability and a movement of a discharge position is used. It can be realized more easily at low cost. Further, since the linear member 37 (electric conductor) is a rigid body, it can be easily processed and can be provided in close contact with the metal oxide 19.
  • the heating heater 13 is used as a nucleus, and a double coil 35 holding a metal oxide 19 is surrounded by the heater 13. It is arranged so that it contacts the surface of the metal oxide 19 held by the double coil 35.
  • the linear member 37 By arranging the linear member 37, the vibration suppressing effect of the double coil 35 works, and the metal oxide 19 can be prevented from falling.
  • a large amount of metal oxide 19 is retained between the pitches of the double coils 35, and this has the effect of replenishing the metal oxide that has disappeared due to deterioration over time during discharge.
  • FIG. 6 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the third embodiment
  • FIG. 7 is a schematic perspective view showing the indirectly heated electrode similarly.
  • illustration of the metal oxide 19 is omitted for explanation.
  • the gas discharge tube according to the third embodiment includes a glass bulb 1 as a tubular container and a pair of introduction tubes respectively sealed at both ends of the glass pulp 1.
  • Wires (introduction pins) 3 and 5 and indirectly heated electrodes 51 attached to the tips of a pair of introduction wires 3 and 5 are provided. Then, a discharge space S is formed between the indirectly heated electrodes 51.
  • the indirectly heated electrode 51 has a heater 13 for heating, an electron emitting portion 33, a mesh member 53, and a connecting pin 21. I have.
  • the mesh member 53 is a conductive rigid body (metal conductor) belonging to groups IIIa to VIIa, VIII, and Ib of the periodic table, and specifically includes tungsten, tantalum, molybdenum, rhedium, and niobium. , Osmium, iridium, iron, nickele, nickel, nickel, zirconium, manganese, chromium, vanadium, rhodium, rare earth metals, etc., or a single metal or a metal alloy of these metals.
  • a mesh-like member obtained by knitting a tandasten wire having a diameter of 0.03 mm into a mesh shape is used.
  • the size of the mesh in the mesh member 53 is set to 80 mesh.
  • the mesh member 53 is disposed outside the double coil 35 over the longitudinal direction of the double coil 35 so as to be substantially orthogonal to the discharge direction. 53 and 3 are electrically connected.
  • the double coil 35 is electrically connected to the other of the pair of lead wires 3 and 5 by welding or the like.
  • nickel-made plate members 55, 57 are fixed while being electrically connected to the mesh member 53 by welding.
  • the lead wire 5 is fixed to the mesh member 53 while being electrically connected to the mesh member 53 by welding.
  • the connecting pin 21 is electrically connected to the plate member 55 by welding or the like.
  • the other end 13 b of the heater 13 and the electron emitting portion 33 double coil 35, metal oxide 19
  • the connecting pin 21 is electrically connected via the shaped member 53.
  • the metal oxide 19 is held by the double coil 35 and provided in contact with the mesh member 53.
  • the metal oxide 19 and the mesh member 53 are exposed outside the indirectly heated electrode 51 so that the surface of the metal oxide 19 and the surface of the mesh member 53 become discharge surfaces.
  • the mesh member 53 comes into contact with the surface of the metal oxide 19.
  • the metal oxide 19 is made of metal carbonate (for example, barium carbonate, strontium carbonate, calcium carbonate, etc.) as an electrode material, and a heating heater 13 is provided inside the double coil 35.
  • the mesh member 53 is applied from the side of the mesh member 53, and the applied metal carbonate is provided by vacuum thermal decomposition.
  • vacuum heating decomposition is performed by energizing the heating heater, AC heating decomposition is preferable to DC heating decomposition.
  • each of the indirectly heated electrodes 51 has one end 13 a electrically connected to one of the pair of introduction lines 3, 5.
  • the heater 13 is electrically connected to the other end 13 b of the heater 13, and is electrically connected to the other of the pair of introduction lines 3 and 5.
  • an electron emitting section 33 (double coil 35, metal oxide 19), which is electrically connected and emits electrons by receiving heat from the heater 13 for heating.
  • 3 and the electron emission unit 3 3 are mounted with the part electrically connected (the other end 13 b of the heater 13 and the connection pin 21) facing the discharge space S. Therefore, the heater 13 is disposed so that the axial direction thereof extends in the tube axis direction of the glass bulb 1.
  • the current (heater current) flowing through the heaters 1 and 3 during preheating (heater current) Connecting pin 21, mesh member 53 (plate members 55, 57), electron emission section 33 (double coil 3 5. Introduce through the metal oxide 1 9) and reach line 5, and connect the ends 13 a and 13 b of the heater 13 directly to the introduction lines 3 and 5. No need.
  • the indirectly heated electrode 51 is used as the electrode of the gas discharge tube, the diameter of the glass bulb 1 can be reduced.
  • the meshed member 53 is an indirectly heated electrode.
  • An equipotential surface is effectively formed on the discharge surface 51 (the surface of the metal oxide 19 and the surface of the mesh member 53).
  • the mesh member 53 is composed of a plurality of electric wires (conductive paths) and is not regulated so that current flows in a single direction. Therefore, the electric resistance between the ends of the surface of the mesh member 53 is extremely small, and the surface of the mesh member 53 is almost in an equipotential state, and the electric potential of a discharge surface composed of a plurality of discharge points or discharge lines is obtained. Are almost equal.
  • the mesh member 53 forms a plurality of electric circuits in the discharge surface through which the discharge current can flow in a direction parallel to the discharge surface, that is, the path of the discharge electrons (emission) (equipotential circuit). Are formed.
  • the equipotential surface is effectively formed by the mesh member 53 in contact with the metal oxide 19, and thermionic electrons are emitted in a wide area of the formed equipotential surface.
  • the discharge area increases, and the amount of electrons emitted per unit area (electron emission density) increases, so that the load at the discharge position is reduced.
  • Stabilization due to sputtering and oxidation with reduced metal, that is, a decrease in thermionic emission ability can be suppressed.
  • the occurrence of local discharge can be suppressed, and the life of the electrode can be extended.
  • the movement of the discharge position is also suppressed, a stable discharge can be obtained for a long time.
  • the discharge area increases, the operating voltage and the amount of generated heat of the indirectly heated electrode 51 can be reduced.
  • the current density is slightly increased and the load is slightly increased, that is, even if the discharge current is increased, in association with the increase in the discharge area.
  • damage can be reduced as compared with conventional ones.
  • an indirectly heated electrode having a large discharge current and a shape substantially the same as that of the conventional one can be provided, and a pulse operation and a large current operation can be realized.
  • the mesh-like member 53 is used as the electric conductor, a configuration capable of suppressing a decrease in thermionic emission capability and a movement of the discharge position is achieved.
  • the electric conductor can be realized more easily at low cost.
  • the mesh member 53 (electric conductor) is a rigid body, it can be easily processed and can be provided in close contact with the metal oxide 19. Further, many places where the mesh member 53 and the metal oxide 19 come into contact can be easily provided.
  • the heating heater 13 is used as a nucleus, and the double coil 35 holding the metal oxide 19 is surrounded by the heating heater 13.
  • the vibration suppression effect of the double coil 35 works.
  • the metal oxide 19 can prevent falling.
  • the pitch of the double coil 3 5 A large amount of metal oxide 19 is retained in between, which has the effect of replenishing the lost metal oxide due to the deterioration over time during discharge.
  • the area of the equipotential surface increases, so that the discharge area can be further increased.
  • FIG. 8 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the fourth embodiment.
  • the fourth embodiment is different from the second embodiment in that a metal oxide as an electron emitting material is provided at the other end 13b of the heater 13 for heating.
  • the gas discharge tube according to the fourth embodiment includes a glass bulb 1 as a tubular container, and a pair of lead wires sealed at both ends of the glass bulb 1. (Introduction pins) 3, 5, and indirectly heated electrodes 71 attached to the tips of a pair of introduction wires 3, 5. Then, a discharge space S is formed between the indirectly heated electrodes 71.
  • the indirectly heated electrode 71 has a heater 13 for heating, an electron emitting portion 33, a linear member 37, and a connecting pin 21.
  • the other end 13 b of the heating data 13 is provided with a metal oxide 73 as an electron emitting material.
  • Metal oxide 7 3 as well as the metal oxide 1 9, barium (B a), strontium (S r), any single oxide of calcium (C a), or a mixture of these oxides,
  • the main constituent element is an oxide of any one of barium, strontium, and calcium, or a mixture of these oxides
  • the sub-constituent element is a rare earth metal containing lanthanum (Ilia in the periodic table). Is an oxide Used.
  • the metal oxide 73 is applied in the form of a metal carbonate (for example, barium carbonate, strontium carbonate, calcium carbonate, or the like) as an electrode material, and is obtained by subjecting the applied metal carbonate to vacuum thermal decomposition to form a metal oxide. Will be done.
  • the metal oxide 73 thus obtained finally becomes an electron-emitting material.
  • the metal carbonate as an electrode material is applied to the other end 13 b while the connecting pin 21 is fixed to the other end 13 b of the heater 13.
  • the other end 13 b of the heater 13 is provided with a metal oxide 73 as an electron emitting material.
  • the metal oxide 73 is quickly heated by the heater 13 to emit thermoelectrons from the metal oxide 73, so that a preliminary discharge occurs in the gas discharge tube. As a result, the startability of the gas discharge tube can be improved.
  • FIG. 9 is a schematic sectional view showing an indirectly heated electrode included in the gas discharge tube according to the fifth embodiment.
  • the gas discharge tube according to the fifth embodiment includes a glass bulb 1 as a tubular container, and a pair of lead wires sealed at both ends of the glass bulb 1. (Introduction pins) 3, 5, and indirectly heated electrodes 91 attached to the tips of a pair of introduction wires 3, 5. Then, a discharge space S is formed between the indirectly heated electrodes 91.
  • the indirectly heated electrode 91 has a heater 13 for heating, an electron emitting portion 17, a linear member 37, and a connecting pin 21.
  • the electron emitting portion 17 emits electrons by receiving heat from the heater 13. And includes a double coil 18 having a mandrenole 18a and a metal oxide 19 as an electron-emitting material.
  • the linear member 37 is disposed outside the double coil 18 so as to extend in the longitudinal direction of the double coil 18 so as to be substantially orthogonal to the discharge direction.
  • the member 37 is electrically connected.
  • the linear member 37 is electrically connected to the other end 13 b of the heater 13 via the connecting pin 21.
  • the connecting pin 21 and the linear member 37 are connected by welding.
  • the other end 13 b of the heater 13 and the electron emitting portion 17 (double coil 1.8, metal oxide 19) are electrically connected to the power connecting pin 21 and the linear member 37. Will be connected.
  • the linear member 37 is electrically connected to the other introduction wire 5 of the pair of introduction f springs 3 and 5 by welding or the like. As a result, the introduction wire 5 and the electron emitting portion 17 are electrically connected via the linear member 37.
  • the metal oxide 19 is held by the double coil 18 and provided in contact with the linear member 37.
  • the metal oxide 19 and the linear member 37 are exposed outside the indirectly heated electrode 91 such that the surface of the metal oxide 19 and the surface of the linear member 37 become discharge surfaces.
  • the linear member 37 comes into contact with the surface of the metal oxide 19.
  • the metal oxide 19 is made of a metal carbonate (for example, barium carbonate, strontium carbonate, calcium carbonate, etc.) as an electrode material, and a heating heater 13 is provided inside the double coil 18 and a double In a state where the linear member 37 is provided outside the coil 18, the linear metal member 37 is applied from the side of the linear member 37, and the applied metal carbonate is decomposed by heating under vacuum.
  • each of the indirectly heated electrodes 91 having the above-described configuration includes a heating heater 13 and an electron emitting portion 17 (double coil 18 and metal oxide 19).
  • the electrically connected portion, that is, the other end 13 b of the heater 13 and the connection pin 21 are directed toward the discharge space S (the other end 13 b of the heater 13 and the connection pin
  • each of the indirectly heated electrodes 91 has one end 13 a and one of the introduction lines 3, 5.
  • the heater 13 electrically connected to the heater 13 and the other end 13 b of the heater 13 are electrically connected to the other one of the pair of lead wires 3 and 5.
  • An electron emitting portion 17 double coil 18, metal oxide 19 that is electrically connected and emits electrons by receiving heat from the heating heater 13.
  • the part where the 13 and the electron emitting section 17 are electrically connected (the other end 13 b of the heating heater 13 and the connecting pin 21) is mounted with the part facing the discharge space S. Therefore, the heater 13 is disposed so that the axial direction thereof extends in the tube axis direction of the glass bulb 1.
  • the other end 13 b of the heater 13 and the electron emitting portion 17 are electrically connected by the connecting pin 21. Since they are connected, it is possible to realize a configuration capable of reliably performing electrical connection between the heating heater 13 and the electron emitting section 17 simply and at low cost.
  • the connecting pin 21 is used to electrically connect the other end 13 b of the heating heater 13 to the electron emitting portions 17 and 33.
  • the other end 13 b of the heater 13 may be directly electrically connected to the electron emission units 17 and 33.
  • the other end 13 b of the heater 13 and the base metal 15, the linear member 37, or the mesh member 5 3 (the plate member 57) is connected by welding or the like.
  • the glass bulb (arc tube) has a straight tube structure.
  • the present invention is not limited to this, and may be a curved structure or an annular structure.
  • a pair of indirectly heated electrodes 11, 31, 51, 71, 91 emits electrons as a main function, and a cathode. They alternately serve as anodes into which electrons flow.
  • a large amount of heat is generated at the electrodes due to the voltage drop as the electrons flow.
  • the heater 13 from the heater 13 during the sustained discharge of the gas discharge tube is used. Stable sustained discharge can be realized without heat supply or with less heat supply than DC operation.
  • the gas discharge tube of the present invention is applicable to a deuterium gas discharge lamp filled with deuterium, a rare gas lamp filled with a rare gas, a rare gas fluorescent lamp having a rare gas lamp inner surface coated with a phosphor, and a rare gas lamp. It can be used for mercury lamps with mercury added and sealed, and mercury fluorescent lamps (fluorescent lamps) with a phosphor applied to the inner surface of the mercury lamp container.

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  • Discharge Lamp (AREA)

Abstract

L'invention concerne un tube à décharge gazeuse comprenant une ampoule de verre, deux paires de fils de connexion (3, 5) reliés aux deux extrémités de l'ampoule de verre et des électrodes à chauffage indirect (11) fixées aux extrémités des fils de connexion (3, 5). Dans ce tube à décharge gazeuse, un espace de décharge (S) est défini entre les électrodes à chauffage indirect (11). Chacune de ces électrodes à chauffage indirect (11) comprend un dispositif de chauffage (13) dont une extrémité (13a) est reliée électriquement au fil de connexion (3) et une partie émettrice d'électrons (17) (un double boudinage (18) et un oxyde métallique (19)) reliée électriquement à l'autre extrémité (13b) du dispositif de chauffage (13) et au fil de connexion (5), laquelle partie émet des électrons lorsqu'elle est chauffée par le dispositif de chauffage (13). Chaque électrode à chauffage indirect (11) est fixée aux extrémités de la paire de fils de connexion (3, 5) de manière que la partie (broche de connexion (21)) par laquelle le dispositif de chauffage (13) est relié électriquement à la partie émettrice d'électrons (17) fait face à l'espace de décharge (S).
PCT/JP2001/010943 2000-12-13 2001-12-13 Tube a decharge gazeuse Ceased WO2002049073A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2002222636A AU2002222636A1 (en) 2000-12-13 2001-12-13 Gas discharge tube
JP2002550289A JPWO2002049073A1 (ja) 2000-12-13 2001-12-13 ガス放電管

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2000/379369 2000-12-13
JP2000379369 2000-12-13
JP2000379360 2000-12-13
JP2000/379360 2000-12-13
JP2001/238226 2001-08-06
JP2001238226 2001-08-06

Publications (1)

Publication Number Publication Date
WO2002049073A1 true WO2002049073A1 (fr) 2002-06-20

Family

ID=27345433

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/010943 Ceased WO2002049073A1 (fr) 2000-12-13 2001-12-13 Tube a decharge gazeuse

Country Status (3)

Country Link
JP (1) JPWO2002049073A1 (fr)
AU (1) AU2002222636A1 (fr)
WO (1) WO2002049073A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147860A (en) * 1981-03-06 1982-09-11 Hamamatsu Tv Kk Cathode for gas discharge tube
JPH02220346A (ja) * 1989-02-21 1990-09-03 Hamamatsu Photonics Kk 重水素放電管の傍熱陰極
JPH02220345A (ja) * 1989-02-21 1990-09-03 Hamamatsu Photonics Kk ガス放電管の駆動回路
JPH04306550A (ja) * 1990-06-15 1992-10-29 Hitachi Ltd 重水素放電管
JPH04315761A (ja) * 1991-04-15 1992-11-06 Hitachi Ltd 重水素放電ランプ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57147860A (en) * 1981-03-06 1982-09-11 Hamamatsu Tv Kk Cathode for gas discharge tube
JPH02220346A (ja) * 1989-02-21 1990-09-03 Hamamatsu Photonics Kk 重水素放電管の傍熱陰極
JPH02220345A (ja) * 1989-02-21 1990-09-03 Hamamatsu Photonics Kk ガス放電管の駆動回路
JPH04306550A (ja) * 1990-06-15 1992-10-29 Hitachi Ltd 重水素放電管
JPH04315761A (ja) * 1991-04-15 1992-11-06 Hitachi Ltd 重水素放電ランプ

Also Published As

Publication number Publication date
JPWO2002049073A1 (ja) 2004-04-15
AU2002222636A1 (en) 2002-06-24

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