38results about "Cathode ray tubes/electron beam tubes" patented technology

1. A method for controlling a density distribution of electrons provided by an electron source for use in hard x-ray, soft x-ray and / or extreme ultraviolet generation, the method comprising: generating a plurality of electrons from a pattern of ultra-cold excited atoms inside a cavity using an ionizing laser, the electrons having a density distribution determined by at least one of the pattern of excited atoms and the ionizing laser; and accelerating the electrons exiting the cavity using a non-static acceleration profile, the acceleration profile controlling the density distribution of the electrons as they exit the cavity.

An object of the disclosure is to provide an insulator capable of shortening conditioning time and reducing withstand voltage failure when a voltage difference between electrodes is approximately several tens of kV. The insulator according to the disclosure includes an insulating material portion and a glass layer, and a boundary between the insulating material portion and an end portion of a cathode on a side facing an anode is covered with the glass layer.

The invention discloses a high-adhesion anode fluorescent screen and a manufacturing method thereof, and relates to the technical field of low-light-level image intensifier core component manufacturing, the high-adhesion anode fluorescent screen comprises a fluorescent screen, the fluorescent screen is made of glass or a sapphire substrate, the fluorescent screen is provided with a micropore array structure, the micropore array structure comprises a plurality of micropores arranged in an array, the aperture of each micropore is 5-10 [mu] m, and the diameter of each micropore is 5-10 [mu] m. The hole depth is 3-5 microns, the hole pitch is 1-2 microns, fluorescent powder is filled in each micropore, and the fluorescent powder is made of P43 or P45 fluorescent powder. According to the invention, the micropore array can form an anchoring structure, the fluorescent powder slurry is coated, the holes are filled with the particles and the binder, and the fluorescent powder layer and the substrate are locked; the stripping tendency of the fluorescent powder layer caused by thermal expansion and cold contraction, vibration or external stress is resisted through geometric constraint, and interaction force is generated with internal stress of the fluorescent powder layer, so that adhesion is enhanced; a narrow-band efficient fluorescent material is selected to cooperate with the micropore light regulation effect, the efficient light-emitting characteristic of the fluorescent powder is enhanced, a mature manufacturing process combination is combined, and breakthrough improvement of the performance of the fluorescent screen is achieved.

Indolo[3.2.1-jk]carbazole-6-carbonitrile derivatives of the formula (I) as blue fluorescent emitters in organic electroluminescent devices, more particularly OLEDs.

Embodiments include an apparatus, comprising: a conductive base; an insulating substrate; an electron emitter disposed on the insulating substrate; a grid disposed adjacent to the electron emitter, the grid including a first conductive side and a second conductive side separate from the first conductive side; a plurality of posts; wherein: the first conductive side is attached to the insulating substrate through a first group of the posts; the second conductive side is attached to the insulating substrate through a second group of the posts; and the conductive base is attached to the insulating substrate through a third group of the posts.

The embodiment of the present application relates to a fluorescent screen, comprising: a fluorescent screen part; a first structure layer, the first structure layer is arranged on the fluorescent screen part; the first structure layer comprises a fluorescent powder layer and a filling oxide; the fluorescent powder layer comprises fluorescent powder and bonding oxide, the bonding oxide is used for bonding together between the particles of the fluorescent powder and the surface of the fluorescent screen part; the filling oxide is inorganic material; at least part of the filling oxide is filled in the internal pore of the fluorescent powder layer.

The utility model discloses a CRT (Cathode Ray Tube) graphic display device, which relates to the field of electronic equipment and comprises a device shell, a CRT imaging device is arranged in the device shell, a cooling device is arranged around the CRT imaging device, the imaging device comprises a kinescope, one end of the kinescope is provided with a display surface, and one end of the kinescope far away from the display surface is provided with a data connection port. And the data connection port extends out of the device shell. The efficient cooling device is integrated in the device shell, the device not only comprises the fixing plate attached to the outer surface of the kinescope and the heat dissipation outer ring surrounding the data connection port, but also realizes liquid cooling circulation through the infusion tube and the through groove, so that the temperature around the kinescope and the data connection port is effectively reduced, and meanwhile, the heat dissipation effect of the kinescope and the data connection port is improved. And through the design of mechanical structures such as the sliding blocks and the connecting rods, flexible adjustment and stable supporting of the heat dissipation outer ring are achieved, the heat dissipation efficiency is improved, and the stability of the structure is enhanced.

The invention relates to a device for applying accelerated electrons to fluids and the inner walls of hollow bodies, comprising a cylindrical electron exit window (102) as part of a cylindrical housing (101) having a cylindrical axis (103) and enclosing an evacuable space; at least one wire-shaped, strand-shaped, rod-shaped, annular, helical, or cylindrical cathode (104a) arranged within the evacuable space and enclosed by the cylindrical electron exit window (102) and by a cylindrical control grid (104b), wherein the cylindrical control grid (104b) has a diameter smaller than the diameter of the cylindrical electron exit window (102), and wherein a first power supply device is electrically conductive between the wire-shaped, strand-shaped, rod-shaped, annular,a helical or cylindrical cathode (104a) and the cylindrical electron exit window (102) is connected, such that electrons can be emitted from the wire-shaped, strand-shaped, rod-shaped, ring-shaped, helical or cylindrical cathode (104a) and accelerated radially away from the cylinder axis (103) of the cylindrical housing (101) in the direction of the cylindrical electron exit window (102), wherein , a) a first hollow cylinder (107; 307) encloses the cylindrical electron exit window (102) and the first hollow cylinder (107; 307) and the electron exit window (102) are spaced apart from each other, so that a first annular free space is formed between the first hollow cylinder (107; 307) and the electron exit window (102); b) The first support elements (105) of the cylindrical control grid (104b) and the second support elements (106) of the concentrically arranged cylindrical electron exit window (102) run centrally symmetrically to each other along the respective lateral surfaces and are arranged azimuthally within equal angular segments with an angle ω.

Embodiments include an apparatus, comprising: a conductive base; an insulating substrate; an electron emitter disposed on the insulating substrate; a grid disposed adjacent to the electron emitter, the grid including a first conductive side and a second conductive side separate from the first conductive side; a plurality of posts; wherein: the first conductive side is attached to the insulating substrate through a first group of the posts; the second conductive side is attached to the insulating substrate through a second group of the posts; and the conductive base is attached to the insulating substrate through a third group of the posts.

A photocathode epitaxial structure. The photocathode epitaxial structure includes an improved substrate stack. The improved substrate stack includes a GaAs substrate and one or more additional layers formed on the GaAs substrate. The one or more additional layers are configured to provide an improved substrate stack surface with predetermined characteristics for forming a semiconductor device on the improved substrate stack surface. The photocathode epitaxial structure further includes an InGaAs p-type photocathode formed on the improved substrate stack surface. The InGaAs p-type photocathode has a predetermined percentage of In.

A plasma chamber for a UV light source includes a plasma generation region defining a plasma confinement region. A port that allows generated light to be transmitted out of the chamber is positioned adjacent a side of the plasma generation region. A high voltage region is coupled to the plasma generation region. A ground region is coupled to the high voltage region, the ground region defining an outer surface configured to be coupled to ground and dimensioned to receive an enclosing inductor core. A width of the high voltage region is greater than a width of the ground region.

The creation of virtual particles is advantageous due to the high density of allowed energy states in a vacuum, but is a hindrance due to the relatively small number of allowed states in a normal metallic conductor. This difference can be exploited to create a highly efficient electrical energy generator, which is the object of the present invention.SOLUTION: In an electric energy generating device formed of a conductive hollow casing 2 which is made of metal or quartz containing a conductor and connected to a power source 8 for driving an electron gun 30 made of tungsten-hafnium alloy and in which a grid 25 is provided on the electron gun 30, electrons hit a target on the opposite side, and a magnet 4 makes the electrons linearly run toward the target. The housing 2 is grounded until the hollow is saturated, and when saturated, the MOSFET12 prevents the electrons from going to the ground, and a diode 9 guides the electrons to a capacitor 10 and from the capacitor 10 to a load.SELECTED DRAWING: Figure 1

The present invention relates to a photocathode for a vacuum system, wherein the photocathode is configured to receive electromagnetic radiation having an incident wavelength and to emit electrons in response thereto. The photocathode comprises a conductive structure having a geometry, the geometry comprising a tip portion. The tip portion is adapted to provide a field enhancement β when the conductive structure is illuminated with electromagnetic radiation, wherein β is greater than about 10 2 . The photocathode further comprises a substrate, the substrate being or comprising a dielectric substrate, the substrate supporting the conductive structure.

A cathode-ray tube ultraviolet light source includes a metal housing provided with a light-transmissive window, a heatsink disposed within the metal housing, a phosphor having a first surface and an opposing second surface, wherein the second surface of the phosphor is in thermal contact with the heatsink, and an electron gun capable of developing an electron beam to impinge upon the first surface of the phosphor, whereby light emitted from the second surface of the phosphor is directed through the light-transmissive window.

The present invention provides a microchannel plate, a preparation method and application thereof, where the microchannel plate is provided with a large number of channels penetrating in the thickness direction. On one side of an inlet end face of the microchannel plate, a flared end face of each channel is a hexagonal tapered bore; and in a cross-section perpendicular to an axial direction of each channel, the flared end face of the channel has an outer edge that is hexagonal and an inner edge that is circular. The present invention proposes a hexagonal special-shaped flared microchannel plate with an array of micropores having hexagonal tapered bores in the end face and cylindrical inside, where the circles in the form of a hexagonal packed periodic array is replaced with the hexagons in the form of a hexagonal close-packed periodicarray, so that the close-packed coefficient of the channel array of the microchannel plate increases from 0.907 when the existing circular channels are arranged in a hexagonal manner to 1 when the hexagonal channels are arranged in a hexagonal manner, so that when the flared end face channel wall thickness of the channel of the microchannel plate is ≥ 100 nm, an open area ratio of the microchannel plate is ≥ 91%. The present invention significantly improves the open area ratio of the input surface of the microchannel plate, improves the detection efficiency of the microchannel plate for an input signal, while avoiding generation of a flared tip to cause a tip discharge, and thus is more suitable for practical use.

To provide a jig for use in manufacturing a solid-state imaging device comprising a good quality photoelectric conversion film.SOLUTION: A jig 100 for use in manufacturing a solid-state imaging device comprises a first member 111 that has a first opening portion 111H and covers a package 1 and a signal readout circuit substrate 2 assembled on the package 1 and a second member 112H that has a second opening portion 112H in accordance with a film deposition area of a photoelectric conversion film 4 provided on the signal readout circuit substrate 2 and fits on the first opening portion 111H in such a manner as to enclose the film deposition area.SELECTED DRAWING: Figure 2A

A device for extracting ions and / or electrons from a plasma has a grid (1) and a grid holder (2), on the circumference of which the grid (1) is fastened. According to the invention, the grid (1) is configured as an expanded metal grid. The invention further also provides a plasma source, a plasma coating device, and a method for producing an interference layer or interference layer systems.

A plasma chamber for a UV light source includes a plasma generation region that defines a plasma confinement region. A port is positioned adjacent to a side of the plasma generation region that allows generated light to pass out of the chamber. A high voltage region is coupled to the plasma generation region. A grounded region is coupled to the high voltage region that defines an outer surface configured to be coupled to the ground and is dimensioned for receiving a surrounding inductive core. A width of the high voltage region is greater than the width of the grounded region.

A method for controlling a density distribution of electrons provided by an electron source for use in hard X-ray, soft X-ray and / or extreme ultraviolet generation, the method comprising generating a plurality of electrons from a pattern of ultracold excited atoms using an ionization laser inside a cavity, wherein the electrons have a density distribution determined by at least one of the patterns of excited atoms and the ionization laser, and accelerating the electrons out of the cavity using a non-static acceleration profile, wherein the acceleration profile controls the density distribution of the electrons as they exit the cavity.

The utility model discloses a static electricity eliminating device in an evaporation process, which is applied to a vacuum environment and comprises an electron emission assembly, a static electricity eliminating assembly and a static electricity eliminating assembly, the accelerating electric field is used for accelerating the electron beam to bombard residual gas particles in vacuum so as to generate positive ions and negative charges, and the screening magnetic field is used for screening and neutralizing the positive ions and the negative charges in the environment and is in contact with static electricity so as to realize static electricity neutralization; wherein the electron emission assembly is a carbon nano fiber emitter, the carbon nano fiber emitter is provided with a carbon nano coating, and the carbon nano fiber emitter is used as an emission source to enable electrons to penetrate through the potential barrier and emit the electrons. The difficulty that electrons pass through a potential barrier is obviously reduced, and the stability and reliability of electron emission are improved.

Disclosed is a surgical instrument comprising a housing, a shaft extending from the housing, a controller comprising a processor, an end effector comprising a jaw comprising a metal wall antenna, an antenna circuit mounted to the metal wall antenna in communication with the processor, and a staple cartridge comprising a cartridge body mounted to the jaw, staples removably stored within the cartridge body, and a signal emitter configured to emit a wireless signal.

The utility model provides a high power density water -cooled anode's filamentous cathode emission performance test device relates to vacuum electron device field. Including: anode body and anode cylinder, wherein, anode cylinder is hollow cylindrical structure, wherein outside end face is connected to anode body, remaining outside surface is contacted with cooling water in anode body, and the inside surface corresponds with filamentous cathode to test the emission performance of the cathode. The anode of this anode cylinder is hollow cylindrical structure, and the gas permeability of the airtight space between anode cylinder and anode body is very low, so that the cathode emission test device can test the emission performance of filamentous cathode. Meanwhile, the outside surface of anode cylinder is contacted with cooling water, so that the electron of higher power density can be received, and the refractory metal evaporation of anode cylinder is not easy to cause, and the anode is damaged. In addition, the device structure is simple, and convenient operation.

Disclosed herein are asymmetric nozzles for a laser wakefield electron accelerators and methods of use thereof. During laser wakefield electron acceleration, a nozzle is used to release a gas with a gas density profile, where the gas density profile is substantially flat-topped or ramped for a distance of at least five millimeters.

The present invention provides a microchannel plate, a preparation method and application thereof, where the microchannel plate is provided with a large number of channels penetrating in the thickness direction. On one side of an inlet end face of the microchannel plate, a flared end face of each channel is a hexagonal tapered bore; and in a cross-section perpendicular to an axial direction of each channel, the flared end face of the channel has an outer edge that is hexagonal and an inner edge that is circular. The present invention proposes a hexagonal special-shaped flared microchannel plate with an array of micropores having hexagonal tapered bores in the end face and cylindrical inside, where the circles in the form of a hexagonal packed periodic array is replaced with the hexagons in the form of a hexagonal close-packed periodicarray, so that the close-packed coefficient of the channel array of the microchannel plate increases from 0.907 when the existing circular channels are arranged in a hexagonal manner to 1 when the hexagonal channels are arranged in a hexagonal manner, so that when the flared end face channel wall thickness of the channel of the microchannel plate is ≥ 100 nm, an open area ratio of the microchannel plate is ≥ 91%. The present invention significantly improves the open area ratio of the input surface of the microchannel plate, improves the detection efficiency of the microchannel plate for an input signal, while avoiding generation of a flared tip to cause a tip discharge, and thus is more suitable for practical use.

The invention provides a power amplifier and a preparation method thereof, a radio frequency power amplifier chip and electronic equipment. The power amplifier comprises a grid electrode, an insulating substrate layer, a cathode and an anode, the grid electrode is provided with a groove, an opening of the groove is located in the top face of the grid electrode, the groove comprises a groove bottom wall face and two groove side wall faces, the two groove side wall faces are oppositely arranged in a spaced mode in the first direction, and the insulating substrate layer is arranged on the groove bottom wall face and covers the groove bottom wall face. The cathode and the anode are both arranged on the surface, back on to the groove bottom wall surface, of the insulating substrate layer and are both arranged at intervals with the two groove side wall surfaces, the cathode and the anode are oppositely arranged at intervals in the second direction, and the first direction is different from the second direction. According to the technical scheme, the nonlinearity and low distortion of the output waveform of the power amplifier can be ensured, so that the saturation characteristic of the output characteristic curve is obtained, and the power amplifier meets the application requirement.

A particle accelerator includes a waveguide comprising a series of accelerating units. The series of accelerating units includes an input accelerating unit configured to accelerate an electron beam along a central axis of the unit. An electron source is configured to input the electron beam into the input accelerating unit, and a magnet arrangement is configured to prevent electrons that have deviated from the electron beam from impacting the electron source.

The device for extracting ions and / or electrons from a plasma comprises a grid (1) and a grid holder (2) around which the grid (1) is fixed. According to the invention, the grid (1) is configured as an expanded metal grid. The invention also provides a plasma source, a plasma coating device, and a method for manufacturing an interference layer or an interference layer system.