5results about "Multiplier anode arrangements" patented technology

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.

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.

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.

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 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.