摘要:
An indirectly heated cathode C1 comprises a heater 1, a double coil 2, a mesh member 3, and a metal oxide 10. An electrical insulating layer 4 is formed on the surface of heater 1. Heater 1 is inserted into and positioned at the inner side of double coil 2. Mesh member 3 is disposed along the length direction of double coil 2 at the outer side of double coil 2. Double coil 2 is grounded by being connected to the ground terminal of heater 1 via a lead rod 7. Metal oxide 10 is held by double coil 2 and disposed to be in contact with mesh member 3. Metal oxide 10 and mesh member 3 are exposed to the outer side of indirectly heated electrode C1 so that the surface of metal oxide 10 and the surface of mesh member 3 make up a discharge surface and mesh member 3 is in contact with the surface part of metal oxide 10.
摘要:
An indirectly heated cathode (C1) comprises a heater (1), a coiled-coil (2), a mesh-like member (3), and a metal oxide (10). An electric insulating layer (4) is formed on the surface of the heater (1). Inside the coiled-coil (2), the heater (1) is inserted and disposed. The mesh-like member (3) is extended outside the coiled-coil (2) and along the length of the coiled-coil (2). The coiled-coil (2) is connected to the terminal, on the grounded side, of the heater (1) through a lead rod (7) and thereby grounded. The metal oxide (10) is held by the coiled-coil (2) and is in contact with the mesh-like member (3). The metal oxide (10) and the mesh-like member (3) are exposed outside the indirectly heated cathode (C1) in such a way that the surface of the metal oxide (10) and the surface of the mesh-like member (3) serve as the discharge surfaces. The mesh-like member (3) is in contact with the surface of the metal oxide (10).
摘要:
A hollow cathode (16) capable of self-heating by back ion bombardment to a thermionic emission temperature axially discharges therefrom an ionized plasma (26) of an ambient gas (14) such as xenon. Electrons are axially or radially extractable from the plasma (26) by an anode (18). A voltage is applied to a keeper electrode (20) disposed between the cathode (16) and anode (18) to sustain plasma (26) discharge of the gas (14) between the cathode (16) and keeper electrode (20). A control electrode (22) is disposed between the keeper electrode (20) and the anode (18). Application of a positive voltage (relative to the cathode) to the control electrode (22) causes the plasma (26) discharge to extend from the cathode (16) to the anode (18), thus closing the switch. Application of a negative control electrode (22) voltage, or simply returning the control electrode (22) to cathode (16) potential, causes the plasma (26) discharge to retract back to the area of the keeper electrode (20), thereby opening the switch.
摘要:
An indirectly heated cathode (C1) for a gas discharge tube comprises a heater (1), a coiled-coil (2), a plate-like member (3), and a metal oxide (10). An electric insulating layer (4) is formed on the surface of the heater (1). The heater (1) is disposed inside the coiled-coil (2). The plate-like member (3) is extended inside the coiled-coil (2) serving as a discharge surface along the length of the coiled-coil (2) and is electrically connected to the coiled-coil (2). The plate-like member (3) is connected to the terminal, on the grounded side, of the heater (1) and thereby grounded. The metal oxide (10b) is held by the coiled-coil (2) and is in contact with the plate-like member (3). The metal oxide (10) is in contact with the mesh-like member (3).
摘要:
A hollow cathode (16) capable of self-heating by back ion bombardment to a thermionic emission temperature axially discharges therefrom an ionized plasma (26) of an ambient gas (14) such as xenon. Electrons are axially or radially extractable from the plasma (26) by an anode (18). A voltage is applied to a keeper electrode (20) disposed between the cathode (16) and anode (18) to sustain plasma (26) discharge of the gas (14) between the cathode (16) and keeper electrode (20). A control electrode (22) is disposed between the keeper electrode (20) and the anode (18). Application of a positive voltage (relative to the cathode) to the control electrode (22) causes the plasma (26) discharge to extend from the cathode (16) to the anode (18), thus closing the switch. Application of a negative control electrode (22) voltage, or simply returning the control electrode (22) to cathode (16) potential, causes the plasma (26) discharge to retract back to the area of the keeper electrode (20), thereby opening the switch.
摘要:
An indirectly heated cathode for gas discharge tube C1 comprises a heater 1, a double coil 2, a plate member 3, and a metal oxide 10. An electrical insulating layer 4 is formed on the surface of heater 1. Heater 1 is disposed at the inner side of double coil 2 . Plate member 3 is disposed along the length direction of double coil 2 at the inner side of double coil 2, which is to be the discharge surface side, and is electrically connected to double coil 2. Also, plate member 3 is grounded by being connected to the ground terminal of heater 1. Metal oxide 10 is held by double coil 2 and disposed to be in contact with plate member 3. Metal oxide 10 is in contact with double coil 2.
摘要:
A method of producing a discharge device enables an LaB 6 cathode (12) to be formed by a thick-film printing method. The method comprises applying to a base electrode (10) a paste prepared by mixing LaB 6 powder with alkali glass powder in a proportion of 20 to 40 wt.% with respect to the LaB 6 powder, burning the paste, and activating the paste by gas discharge with a large current after an exhaustion step to form the LaB 6 cathode (12) on the base electrode (10).