18results about "Multiplier anode arrangements" patented technology

To provide a photoelectron multiplier capable of improving time characteristics due to an anode.SOLUTION: A photoelectron multiplier 1 includes: a photocathode 3; ten dynodes 10 that multiply electrons emitted from the photocathode 3; and an anode 7 that collects electrons multiplied by the dynode 10. The anode 7 has an electron collection surface 73 that faces a secondary electron emission surface 11j of a tenth dynode 10j and extends along the secondary electron emission surface 11j. The anode 7 has no electron passage hole on the electron path from the ninth dynode 10i to the tenth dynode 10j.SELECTED DRAWING: Figure 2

This photomultiplier tube includes a photoelectric surface, N-stage dynodes (N is an integer of 2 or more) for multiplying electrons emitted from the photoelectric surface, and an anode for collecting electrons multiplied by the dynodes. The anode has an electron collection surface that faces a secondary electron emission surface of the N-th stage dynode and at least partially extends along the secondary electron emission surface, and there is no electron passage hole on an electron path from the N-1th dynode to the N-th dynode.

To provide an electron detector and a charged particle detector that can improve the quality of electrical signals. [Solution] The electron detector 5 comprises an electron detection unit 53 including a first electrode 52, a resin sheet 59 positioned on one side in the Z direction relative to the first electrode 52, a second electrode 54 facing the first electrode 52 via the resin sheet 59, an insulating substrate 61 positioned on one side in the Z direction relative to the second electrode 54 and supporting the electron detection unit 53, the resin sheet 59 and the second electrode 54, an output unit 55 positioned on one side in the Z direction relative to the insulating substrate 61, electrically connected to the second electrode 54 and outputting an electrical signal, and a support unit 62 supporting the output unit 55 such that the output unit 55 and the second electrode 54 face each other via the insulating substrate 61 and a space SP1 is formed between the output unit 55 and the insulating substrate 61.

To provide an electron multiplier tube with an improved structure.SOLUTION: The invention may be implemented in the form of a detector containing 11 or more electron emitting surfaces. A detector includes one or more detector components configured to define an environment inside the detector on one side and an environment outside the detector on the other side, and the one or more detector components are configured to restrict or prevent gas flow from an environment external to the detector to an environment internal to the detector. Such a detector can be used in a mass spectrometer.SELECTED DRAWING: Figure 5

The CEM and ion detector of the present embodiment has a configuration for achieving ion detection with higher sensitivity than the prior art. The channel-type electron multiplier has at least a channel body, an input-side conductive layer, an output-side conductive layer, and an electrode. The channel body contains a channel having a tapered opening portion provided on the input side, and a resistance layer and an electron emission layer formed on the inner wall surface of the channel. The input-side conductive layer is provided on the input end surface of the channel body and a part thereof extends within the tapered opening portion. The output-side conductive layer is provided on the output end surface of the tapered opening portion. The electrode has one or more openings through which charged particles pass, and is disposed on the opposite side of the output end surface with respect to the input end surface. The electrode and the input-side conductive layer are set to the same potential by excluding the influence of an external electric field within the tapered opening portion.

To provide an improved micro channel plate.SOLUTION: A method for selectively vapor-depositing electrode contact metal on one side of a MCP channel opening is prepared. One or more MCPs are removably fixed on the surface of a platter rotating around the central platter axis, inclined on a rotary ring fixture surrounding the vapor deposition source of contact metal and further rotating so as to go around the vapor deposition source of the contact metal. A mask having a mask opening having a variable size is arranged between the rotating platter and the vapor deposition source, and the mask goes around the vapor deposition source with the rotating platter without rotating along the own axis like the rotating platter.SELECTED DRAWING: Figure 10

Provided is a photomultiplier tube including: a container including a window portion formed of a light-transmitting material, and a tubular portion that is connected to the window portion and defines a vacuum space in combination with the window portion; a photoelectric surface that is formed of a photoelectron-emitting material consisting of sodium, potassium, and antimony, is provided on a first surface of the window portion on a side of the vacuum space, and emits photoelectrons in correspondence with incident light; and an electron multiplier that emits secondary electrons in correspondence with incidence of the photoelectrons emitted from the photoelectric surface, and multiplies the secondary electrons. An aluminum oxide layer is formed between the photoelectric surface and the window portion and on a surface of the tubular portion.

An electron detector according to the present invention comprises an electron detection unit that includes a first electrode, a resin sheet that is provided on one side in the Z direction relative to the first electrode, a second electrode that is opposite the first electrode with the resin sheet therebetween, an insulating substrate that is provided on the one side in the Z direction relative to the second electrode and supports the electron detection unit, the resin sheet, and the second electrode, an output unit that is provided on the one side in the Z direction relative to the insulating substrate, is electrically connected to the second electrode, and outputs an electrical signal, and a support part that supports the output unit such that the output unit and the second electrode are opposite with the insulating substrate therebetween and a space is formed between the output unit and the insulating substrate.

To provide an improved microchannel plate.SOLUTION: The invention provides a night vision system, a microchannel plate (MCP), and a planetary deposition system and methodology for selectively depositing an electrode contact metal on one side of MCP channel openings. One or more MCPs can be releasably secured to a face of a platter that rotates about its central platter axis. The rotating platter can be tilted on a rotating ring fixture surrounding an evaporative source of the contact metal. Therefore, the rotating platter further rotates such that it orbits around the evaporative source of the contact metal. A mask with a variable size mask opening is arranged between the rotating platter and the evaporative source. Although the mask orbits around the evaporative source together with the rotating platter, the mask does not rotate along its own axis as does the rotating platter.SELECTED DRAWING: Figure 10

To provide a charged particle detector capable of stably acquiring a detection signal from a multi-dynode.SOLUTION: A charged particle detector 1 includes: a microchannel plate 2 having an input surface 2a on which electrons (charged particles) are input, multiplication portions 5A, 5B performing multiplication of electrons while maintaining positional information of the electrons, and an output surface 2b outputting electrons multiplied by the multiplication portions 5A, 5B; a multi-dynode 3 having a plurality of dynodes 12 multiplying the electrons output from the output surface 2b, and insulation regions 13 positioned between the dynodes 12, 12; and an anode 4 disposed in a spatial region between the output surface 2b and the multi-dynode 3, and having collection portions 21 for collecting electrons multiplied by the dynodes 12 and aperture portions 22 for allowing electrons output from the output surface 2b to pass therethrough to a dynodes 12 side. All of the insulation regions 13 overlap the collection portions 21 when viewed in an output direction of the electrons from the output surface 2b.SELECTED DRAWING: Figure 1

The present invention belongs to the technical field of photomultiplier tubes, and provides a composite dielectric anode and a composite dielectric anode microchannel plate type photomultiplier tube, which includes a photocathode, a tube shell, a microchannel plate and a composite dielectric anode. The photocathode is hermetically connected to the front end of the tube shell, the microchannel plate is assembled inside the tube shell, and the composite dielectric anode is hermetically connected to the end of the tube shell. The photocathode receives photons and converts the photons into photoelectrons. The photoelectrons are incident into the microchannel plate under the action of a focusing electric field. After electron multiplication by the microchannel plate, an electron cloud signal is output. The electron cloud signal is collected by the composite dielectric anode, and the electron cloud signal is converted into an electrical pulse signal and output to the outside of the photomultiplier tube. The composite dielectric anode is provided with two or more dielectrics with different dielectric constants between the anode core and the anode shell, so that the anode impedance is adjustable and matched with the impedance of the connected electronics at the rear end, and a photomultiplier tube for obtaining an ultrafast pulse signal is obtained.

The present disclosure provides a kind of photoelectric detection anode and multi-anode photomultiplier, it is related to photoelectric detection technical field.The photoelectric detection anode includes position detection layer and time detection layer, wherein: the position detection layer includes metal plate, the metal plate includes multiple regions, each region in the multiple regions is equipped with metal needle, and the metal needle of each region is connected with first signal reading device respectively, for obtaining position information by the charge amount of signal acquisition;The time detection layer includes at least one metal wire, and the end of the at least one metal wire is connected with second signal reading device, for obtaining time information by the waveform data of signal acquisition.The present disclosure realizes that the position information of photomultiplier position detection layer and the time information of time detection layer can be read out simultaneously and independently.

A charged particle detector includes a microchannel plate having an input surface having electrons (charged particles) input thereon, a multiplication portion performing multiplication of electrons while maintaining positional information of the electrons, and an output surface outputting electrons multiplied by the multiplication portion; a multi-dynode having a plurality of dynodes multiplying the electrons output from the output surface, and insulation regions positioned between the dynodes; and an anode disposed in a spatial region between the output surface and the multi-dynode, and having collection portions for collecting electrons multiplied by the dynodes and aperture portions for allowing electrons output from the output surface to pass therethrough to the dynodes side. All of the insulation regions overlap the collection portions when viewed in an output direction of the electrons from the output surface.

The effective quantum efficiency of a metal-channel photomultiplier tube can be increased with an optical system. The optical system can direct incident light from areas of low efficiency on the cathode of the metal-channel photomultiplier tube instead to areas of high efficiency on the cathode. These high-efficiency areas of the cathode can correspond to a position between the dynode structure.

The present disclosure provides a photoelectric detection anode and a multi-anode photomultiplier, and relates to the technical field of photoelectric detection. The photoelectric detection anode comprises a position detection layer and a time detection layer. The position detection layer comprises a plurality of metal strips arranged side by side. The ends of each metal strip in the plurality of metal strips are respectively connected to a first signal readout device for obtaining position information through collected charges. The time detection layer comprises a plurality of metal wires arranged side by side. The ends of each metal wire in the plurality of metal wires are respectively connected to a second signal readout device for obtaining time information through the waveform of the collected signals. The present disclosure realizes the independent reading of the position information of the position detection layer and the time information of the time detection layer of the photomultiplier at the same time.

The effective quantum efficiency of a metal-channel photomultiplier tube can be increased with an optical system. The optical system can direct incident light from areas of low efficiency on the cathode of the metal-channel photomultiplier tube instead to areas of high efficiency on the cathode. These high-efficiency areas of the cathode can correspond to a position between the dynode structure.

An electron detector and a charged particle detector are provided that can improve the quality of an electrical signal. [Solution] The electron detector 5 comprises an electron detection unit 53 including a first electrode 52, a resin sheet 59 arranged on one side of the first electrode 52 in the Z direction, a second electrode 54 facing the first electrode 52 via the resin sheet 59, an insulating substrate 61 arranged on one side of the second electrode 54 in the Z direction and supporting the electron detection unit 53, the resin sheet 59 and the second electrode 54, an output unit 55 arranged on one side of the insulating substrate 61 in the Z direction, electrically connected to the second electrode 54 and outputting an electrical signal, and a support unit 62 supporting the output unit 55 so that the output unit 55 and the second electrode 54 face each other via the insulating substrate 61 and so that a space SP1 is formed between the output unit 55 and the insulating substrate 61.

The present application belongs to the single photon imaging detection technical field, especially relates to a kind of photon detection system based on discrete wedge strip anode, including the vacuum seal tube formed by the window coated with photoelectric cathode, microchannel plate stack and germanium film substrate, discrete wedge strip anode placed outside the vacuum seal tube and signal processor.The present application divides the wedge or strip connected together by existing four-electrode wedge strip anode or four-wedge anode, forms independent wedge and strip, then each wedge and strip is connected to independent preamplifier circuit, and the coordinates of incident photon are obtained by the decoding algorithm of four-electrode wedge strip anode or four-wedge anode.Because wedge and strip are independent, multiple incident photons synchronously arrived can be detected in the direction perpendicular to wedge or strip, and the count rate of detector is also improved.