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公开(公告)号：US11640902B2
公开(公告)日：2023-05-02
申请号：US17241224
申请日：2021-04-27
发明人： Hiroshi Kobayashi , Junichi Kondo
摘要： An ion detector includes a first dynode, a second dynode, a scintillator, a conductive layer, and a photomultiplier tube. The first dynode is configured to emit a charged particle in response to the incidence of the ion. The second dynode is configured to be given a negative potential and emit a secondary electron in response to incidence of the charged particle from the first dynode. The scintillator includes an electron incident surface arranged to receive the secondary electron from the second dynode, and is configured to convert the secondary electron into light. The conductive layer is disposed on the electron incident surface. The photomultiplier tube is configured to detect the light from the scintillator.
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公开(公告)号：US10998176B2
公开(公告)日：2021-05-04
申请号：US16281398
申请日：2019-02-21
摘要： The present embodiment relates to an ion detector provided with a structure for suppressing degradation over time in an electron multiplication mechanism in a multi-mode ion detector. The ion detector includes a dynode unit, a first electron detection portion including a semiconductor detector having an electron multiplication function, a second electron detection portion including an electrode, and a gate part. The first and second electron detection portions are capable of ion detection at different multiplication factors. The gate part includes at least a final-stage dynode as a gate electrode, and controls switching between passage and interruption of secondary electrons which are directed toward the first electron detection portion by adjusting a set potential of the gate electrode.
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公开(公告)号：US10957522B2
公开(公告)日：2021-03-23
申请号：US16661184
申请日：2019-10-23
发明人： Hiroshi Kobayashi , Ginji Sugiura
摘要： An electron multiplier production method including a main body portion, and a channel provided in the main body portion to open at one end surface and the other end surface of the main body portion and emits secondary electrons includes a first step of preparing a main body member including the one end surface and the other end surface, a communicating hole for the channel through which the one end surface and the other end surface communicate being provided in the main body member, a second step of forming the channel by forming a deposition layer including at least a resistive layer on an outer surface of the main body member and an inner surface of the communicating hole using an atomic layer deposition method, and a third step of forming the main body portion by removing the deposition layer formed on the outer surface of the main body member.
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公开(公告)号：US11587775B2
公开(公告)日：2023-02-21
申请号：US16878179
申请日：2020-05-19
摘要： An ion detector according to this embodiment has a structure for reducing influences of signal reflection or the like on an output signal. The ion detector comprises an electron multiplier, a signal output unit, a signal output terminal, and an AC coupler. The AC coupler is disposed on a signal line between the signal output unit and the signal output terminal, including a resin sheet and a pair of conductive sections facing each other with the resin sheet interposed therebetween. One conductive section is electrically connected to an output terminal of the signal output unit, and the other conductive section is electrically connected to the signal output terminal.
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公开(公告)号：US10832896B2
公开(公告)日：2020-11-10
申请号：US16281469
申请日：2019-02-21
IPC分类号： H01J43/18
摘要： The present embodiment relates to an ion detector provided with a structure for suppressing degradation over time in an electron multiplication mechanism in the ion detector. The ion detector includes a dynode unit, serving as an electron multiplication mechanism, which multiplies secondary electrons which are emitted in response to incidence of ions, and a semiconductor detector having an electron multiplication function. Further, a focus electrode having an opening that allows passage of secondary electrons is disposed on a trajectory of secondary electrons which are directed from the dynode unit toward the semiconductor detector, and the focus electrode functions to guide secondary electrons from the dynode unit onto an electron incidence surface of the semiconductor detector.
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公开(公告)号：US10685822B2
公开(公告)日：2020-06-16
申请号：US16665065
申请日：2019-10-28
发明人： Takeshi Endo , Hiroshi Kobayashi
摘要： According to an embodiment, in a CEM assembly and the like, it is possible to reduce a size of a voltage supply circuit configured to stabilize a voltage to be applied to a channel electron multiplier. The CEM assembly includes a CEM and a voltage supply circuit. The CEM includes an input electrode, a multiplication channel, and an output electrode. The voltage supply circuit includes a power source unit and a constant voltage generation unit. A potential of an input electrode A is set by an electromotive force generated by the power source unit. The constant voltage generation unit includes a constant voltage supply unit configured to cause voltage drop. A target potential set at an output-side reference node is maintained by the voltage drop of the constant voltage supply unit.
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公开(公告)号：US10312068B2
公开(公告)日：2019-06-04
申请号：US15740164
申请日：2016-06-30
摘要： A charged particle detector according to the embodiment is provided with an MCP and a PD arranged with a focus electrode interposed therebetween in order to improve a response characteristic as compared to a conventional one in a configuration in which the MCP having a bias angle and the PD are combined. The MCP includes a plurality of through holes each inclined by a bias angle θ and the PD is eccentrically arranged such that a center of an electron incident surface deviates by a predetermined distance in a bias angle direction S3 with respect to a central axis AX1 of the MCP.
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公开(公告)号：US09514920B2
公开(公告)日：2016-12-06
申请号：US15058199
申请日：2016-03-02
摘要： An electron multiplier body including a main body portion, an electron incidence portion, and a channel, in which the channel includes a first inner surface and a second inner surface facing each other, the first inner surface includes a convex first bent portion and a concave second bent portion, and a plurality of first inclined surfaces, the second inner surface includes a convex third bent portion and a concave fourth bent portion, and a plurality of second inclined surfaces, and an interval between a tip of the first bent portion and a tip of the third bent portion, a distance between the first inclined surface and the second inclined surfaces facing each other, an angle between a pair of first inclined surfaces defining the first bent portion, and a length of the channel satisfy predetermined expressions.
摘要翻译： 一种电子倍增器体，包括主体部分，电子入射部分和沟道，其中沟道包括彼此面对的第一内表面和第二内表面，第一内表面包括凸起的第一弯曲部分和凹部 第二弯曲部分和多个第一倾斜表面，所述第二内表面包括凸起的第三弯曲部分和凹入的第四弯曲部分，以及多个第二倾斜表面，并且所述第一弯曲部分的尖端和 所述第三弯曲部的前端，所述第一倾斜面与所述第二倾斜面之间的距离彼此相对，所述一对限定所述第一弯曲部的第一倾斜面与所述通道的长度之间的角度满足预定的表达。
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公开(公告)号：US12112932B2
公开(公告)日：2024-10-08
申请号：US17743563
申请日：2022-05-13
发明人： Takeshi Endo , Hiroshi Kobayashi
摘要： An ion detector includes: a first electron multiplier for detecting first ions having a first polarity; a second electron multiplier for detecting second ions having a second polarity different from the first polarity; a first anode for capturing electrons emitted from the first electron multiplier; a second anode for capturing electrons emitted from the second electron multiplier; and a switching circuit including a first input terminal electrically connected to the first anode, a second input terminal electrically connected to the second anode, and an output terminal, the switching circuit selectively connecting one of the first input terminal and the second input terminal to the output terminal.
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公开(公告)号：US10930484B2
公开(公告)日：2021-02-23
申请号：US16834097
申请日：2020-03-30
摘要： To provide an ion detector having an electron lens structure that enables expansion of an effective region of an MCP for capturing ions.
The ion detector comprises an MCP unit including an MCP and a first focus electrode, a signal output device including an electron detector surface, and a reset unit disposed between the MCP unit and the signal output device. The reset unit includes a reset element and a second focus electrode. The reset element includes a second input surface and a second output surface opposing each other. On the second output surface, the reset element resets variations in incident angle and velocity of electrons on the second input surface.
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