公开(公告)号：US5852295A

公开(公告)日：1998-12-22

申请号：US838431

申请日：1997-04-07

Applicant: Enio Frota Da Silveira ,  Kevin Bernard Ray ,  Emile Alfred Schweikert ,  Melvin Andrew Park

Inventor： Enio Frota Da Silveira ,  Kevin Bernard Ray ,  Emile Alfred Schweikert ,  Melvin Andrew Park

IPC: H01J49/02 ,  H01J49/14 ,  H01J49/40 ,  H01J49/00

CPC classification number: H01J49/147 ,  H01J49/08 ,  H01J49/40

Abstract: A mass spectrometer 20 includes an electron multiplier 30 for producing an electron avalanche 58 directed toward an ionization region 38. A sample 40 enters the ionization region 38 through a sample inlet 68. In the ionization region 38 the electron avalanche 58 collides with the sample 40 and produces ions 60. A start detector 56 detects the electron avalanche 58 and provides a start signal. The ions 60 exit the ionization region 38 and enter a flight region 26. The ions 60 flow through the flight region 26 and interact with a stop detector 42. The stop detector 42 generates a stop signal in response to being activated. A low pressure enclosure 22 encloses at least the electron multiplier 30 and the ionization region 38. The start and stop signals are supplied to an analysis system for determining the mass of the sample using time-of-flight mass spectrometry.

Abstract translation: 质谱仪20包括用于产生朝向电离区域38的电子雪崩58的电子倍增器30.样品40通过样品入口68进入电离区域38.在电离区域38中，电子雪崩58与样品40碰撞 并产生离子60.启动检测器56检测电子雪崩58并提供启动信号。 离子60离开电离区域38并进入飞行区域26.离子60流过飞行区域26并与停止检测器42相互作用。停止检测器42响应于被激活而产生停止信号。 低压外壳22至少包围电子倍增器30和电离区38.启动和停止信号被提供给用于使用飞行时间质谱法确定样品质量的分析系统。

公开(公告)号：US20180358219A1

公开(公告)日：2018-12-13

申请号：US15778341

申请日：2016-11-21

Applicant: Micromass UK Limited ,  LECO CORPORATION

Inventor： John Brian Hoyes ,  Anatoly Verenchikov ,  Mikhail Yavor ,  Keith Richardson

IPC: H01J49/40 ,  H01J49/06 ,  H01J49/08

CPC classification number: H01J49/406 ,  H01J49/063 ,  H01J49/067 ,  H01J49/068 ,  H01J49/08

Abstract: An ion mirror is disclosed comprising an ion entrance electrode section (62) at the ion entrance to the ion mirror, an energy focussing electrode section (66) for reflecting ions back along a longitudinal axis towards said ion entrance, and a spatial focussing electrode section (64) arranged between the ion entrance electrode section (62) and the energy focussing electrode section (66) for spatially focussing the ions. One or more DC voltage supply is provided to apply a DC potential to the ion entrance electrode section (62) that is intermediate the DC potential applied to the spatial focussing electrode section (64) and the DC potential applied to the energy focussing electrode section (66). The ion mirror further comprises: (i) at least one first transition electrode (68) arranged between said ion entrance electrode section (62) and said spatial focussing electrode section (64), wherein said one or more DC voltage supply is configured to apply a DC potential to said at least one first transition electrode that is intermediate the DC potential applied to the ion entrance electrode section (62) and the DC potential applied to the spatial focussing electrode section (64); and (ii) at least one second transition electrode (69) arranged between said energy focussing electrode section (66) and said spatial focussing electrode section (64), wherein said one or more DC voltage supply is configured to apply a DC potential to said at least one second transition electrode (69) that is intermediate the DC potential applied to the spatial focussing electrode section (64) and the DC potential applied to the ion entrance electrode section (62).

公开(公告)号：US20180350574A1

公开(公告)日：2018-12-06

申请号：US16055080

申请日：2018-08-04

Applicant: The United States of America, as represented by the Secretary of the Navy

Inventor： Benjamin R Conley

IPC: H01J40/06 ,  H01J40/16 ,  H04N5/33

CPC classification number: H01J40/06 ,  H01J40/16 ,  H01J43/246 ,  H01J47/00 ,  H01J49/08 ,  H04N5/332

Abstract: Exemplary metamaterial photocathodes enable detection of light from visible through long wave infrared wavelengths. Metamaterial stacks, comprising gold, silicon, and cesium-oxide, coupled to a semiconductor allow hot electrons to efficiently enter a vacuum. The hot electrons are multiplied in a multichannel plate and directly through another vacuum towards a phosphorus screen.

公开(公告)号：US09412576B2

公开(公告)日：2016-08-09

申请号：US14558283

申请日：2014-12-02

Applicant: KOREAN BASIC SCIENCE INSTITUTE

Inventor： Seung Yong Kim ,  Mo Yang ,  Hyunsik Kim

IPC: H01J49/14 ,  H01J27/20 ,  H01J49/08

CPC classification number: H01J49/147 ,  H01J27/205 ,  H01J49/08

Abstract: The present invention relates to an ion trap mass spectrometer using a cold electron source, in a production of a portable mass spectrometer, in which a microchannel plate (MCP) module is used, initial electrons are induced by injecting ultraviolet photons emitted from an ultraviolet diode to a front surface of the MCP module, electron beams amplified from the electrons are amplified using a channeltron electron multiplier (CEM), the amplified electron beams are accurately adjusted and injected into an ion trap, thus increasing the amplification rate, and since a quadrupole field is used as an ion filter which returns the initially injected electrons to the inside of an ion trap mass separator, the ionization rate increases.

Abstract translation: 本发明涉及使用冷电子源的离子阱质谱仪，在使用微通道板（MCP）模块的便携式质谱仪的生产中，通过注入从紫外二极管发射的紫外光子引发初始电子 到MCP模块的前表面，使用通道电子倍增器（CEM）从电子放大的电子束被放大，将放大的电子束精确地调节并注入到离子阱中，从而增加放大率，并且由于四极杆 场被用作离子过滤器，其将初始注入的电子返回到离子阱质量分离器的内部，电离速率增加。

公开(公告)号：US09230791B2

公开(公告)日：2016-01-05

申请号：US14358809

申请日：2011-11-28

Applicant: Hyun Sik Kim ,  Seung Young Kim ,  Mo Yang

Inventor： Hyun Sik Kim ,  Seung Young Kim ,  Mo Yang

IPC: H01J49/08 ,  H01J49/10 ,  H01J43/04 ,  H01J49/00 ,  H01J49/42 ,  H01J27/02 ,  H01J49/14 ,  H01J43/24 ,  H01J49/38

CPC classification number: H01J49/08 ,  H01J27/028 ,  H01J43/04 ,  H01J43/246 ,  H01J49/0045 ,  H01J49/0054 ,  H01J49/10 ,  H01J49/147 ,  H01J49/38 ,  H01J49/426

Abstract: An anion generating and electron capture dissociation apparatus using cold electrons, which comprises a cold electron generation module configured to generate a large quantity of cold electrons from ultraviolet photons radiated into a mass spectrometer vacuum chamber which is in a high vacuum state has a plurality of ultraviolet diodes configured to emit the ultraviolet photons in the mass spectrometer vacuum chamber. Micro-channel plate (MCP) electron multiplier plates induce and amplify initial electron emissions of the ultraviolet photons from the ultraviolet diodes, and generate a large quantity of electron beams from a rear plate. An electron focusing lens is configured to focus the electron beams amplified through the MCP electron multiplier plates. A grid is configured to adjust energy and an electric current of the electron beams together with the electron focusing lens.

Abstract translation: 使用冷电子的阴离子产生和电子捕获解离装置，其包括被配置为从辐射到处于高真空状态的质谱仪真空室的紫外光子产生大量冷电子的冷电子发生模块，具有多个紫外线 配置为在质谱仪真空室中发射紫外光子的二极管。 微通道板（MCP）电子倍增板诱导和放大来自紫外二极管的紫外光子的初始电子发射，并从背板产生大量的电子束。 电子聚焦透镜被配置为聚焦通过MCP电子倍增器板放大的电子束。 栅格被配置为与电子聚焦透镜一起调节电子束的能量和电流。

公开(公告)号：US07701123B2

公开(公告)日：2010-04-20

申请号：US11301588

申请日：2005-12-13

Applicant: Gregory J. Wells ,  Edward G. Marquette

Inventor： Gregory J. Wells ,  Edward G. Marquette

IPC: H01J9/02

CPC classification number: H01J49/14 ,  H01J3/024 ,  H01J49/08

Abstract: An electron source includes a first electrode, a second electrode, a thermionic element interposed between and electrically isolated from the first electrode and the second electrode, and a guard electrode interposed between and electrically isolated from the first electrode and the second electrode. The thermionic element and the guard electrode may be at substantially the same voltage. Another electron source includes a first electrode, a second electrode, a thermionic element interposed between and electrically isolated from the first electrode and the second electrode, and a thermal expansion component interposed between and electrically isolated from the first electrode and the second electrode. The thermal expansion component may be heated to cause expansion. The heating may be cycled to cause alternating expansion and contraction.

Abstract translation: 电子源包括插入在第一电极和第二电极之间并且与第一电极和第二电极电绝缘的第一电极，第二电极和热电离元件，以及插入在第一电极和第二电极之间并与之电隔离的保护电极。 热电离元件和保护电极可以处于基本上相同的电压。 另一电子源包括介于第一电极和第二电极之间并与之电隔离的第一电极，第二电极和热电离元件，以及介于第一电极和第二电极之间并与之电隔离的热膨胀组件。 热膨胀部件可能被加热以引起膨胀。 可以循环加热以引起交替的膨胀和收缩。

公开(公告)号：US20090026362A1

公开(公告)日：2009-01-29

申请号：US12281908

申请日：2007-03-16

Applicant: Tadashi Arii ,  Yoshihiro Takata ,  Satoshi Otake ,  Shigeki Matsuura

Inventor： Tadashi Arii ,  Yoshihiro Takata ,  Satoshi Otake ,  Shigeki Matsuura

IPC: B01D59/44

CPC classification number: G01N27/64 ,  H01J49/08 ,  H01J49/147 ,  H01J49/162

Abstract: A plurality of molecule components included in a gas are to be ionized at the same time by PI method. For instance, a plurality of molecule components included in a gas generated at a certain instance are accurately analyzed in real time based on PI method. A gas analyzer is provided with a gas transfer apparatus for transferring a gas generated from a sample in a sample chamber to an analyzing chamber; an ionizer for ionizing the gas; a quadruple filter for separating ions by mass/charge ratio; and an ion detector for detecting the separated ions. The ionizer is provided with an ionizing region arranged in the vicinity of a gas exhaust of the gas transfer apparatus, and a lamp for applying light on the ionizing region. Since the lamp outputs light which has light directivity lower than that of a laser beam and travels by spreading, the gas entered the ionizing region in the ionizer receives light in a wide range, and the gas components inside are ionized at the same time.

Abstract translation: 包含在气体中的多个分子成分将通过PI法同时离子化。 例如，在某种情况下产生的气体中包含的多个分子成分可以基于PI法实时准确分析。 气体分析装置具备：气体传送装置，用于将样本室中的样品产生的气体转移到分析室; 用于离子化气体的离子发生器; 用于通过质量/电荷比分离离子的四重滤波器; 以及用于检测分离的离子的离子检测器。 电离器设置有布置在气体传送装置的排气附近的电离区域和用于在电离区域上施加光的灯。 由于灯输出光指向性低于激光束的光并通过扩展而行进，所以进入离子发生器中的电离区域的气体接收到宽范围的光，同时内部的气体成分被离子化。

公开(公告)号：US20070114395A1

公开(公告)日：2007-05-24

申请号：US11491508

申请日：2006-07-20

Applicant: Orven Swenson ,  Feng Hong

Inventor： Orven Swenson ,  Feng Hong

IPC: H01J49/00

CPC classification number: H01J49/08 ,  G01N27/622

Abstract: A photoemissive ion mobility spectrometer is disclosed for of chlorinated hydrocarbons and nitro-organic materials. Backside illumination of a thin gold film by pulsed laser radiation, pulsed ultraviolet xenon flashlamp, or like UV source, is used to produce bursts of low energy photo-emitted electrons. These swarms of thermalized electrons are directly attached by electronegative analytes or by reactant molecules, followed by charge transfer to the more electronegative analyte. Total internal reflection is incorporated for the backside illumination using optical elements such as a fused silica prism. The spectrometer allows for the direct vaporization of adsorbed explosive molecules from surfaces followed by direct injection into the photoemissive ion mobility spectrometer through a heated inlet.

Abstract translation: 公开了用于氯化烃和硝基 - 有机材料的光发射离子迁移谱仪。 通过脉冲激光辐射，脉冲紫外氙闪光灯或类似的紫外光源对薄金膜的背面照明被用于产生低能量光发射电子的脉冲。 这些热电子的这些群体通过电负性分析物或反应物分子直接附着，随后电荷转移到更多的电负性分析物上。 使用诸如熔融二氧化硅棱镜之类的光学元件将内部反射整合到背面照明中。 光谱仪允许从表面直接蒸发吸附的炸药分子，然后通过加热入口直接注入到光发射离子迁移谱仪中。

公开(公告)号：US07038199B2

公开(公告)日：2006-05-02

申请号：US10489215

申请日：2004-03-09

Applicant: Iouri Kalinitchenko

Inventor： Iouri Kalinitchenko

IPC: H01J49/06

CPC classification number: H01J49/08

Abstract: A mass spectrometer and method of mass spectrometry in which polyatomic and doubly charged ion interferences are attenuated by establishing an electron population through which a beam of particles containing elemental sample ions and the interfering ions is passed such that the interfering ions preferentially undergo ion-electron recombination and thus dissociation to remove a significant number of the interfering ions. Means (30 or 32) for providing a population of electrons (34 or 36) in an ICP-MS (22) may comprise a magnetic field means such as an electric coil, or an electron generating device. The population of electrons has an electron number density (>1011 cm−3 to 1014 cm−3), a free electron energy (>0.01 eV to

Abstract translation: 通过建立电子群减少多原子和双电荷离子干扰的质谱仪和质谱法，通过该质谱仪将含有元素样品离子和干扰离子的粒子束通过，使得干扰离子优先进行离子电子重组 并因此解离以除去大量的干扰离子。 用于在ICP-MS（22）中提供电子群体（34或36）的装置（30或32）可以包括诸如电线圈或电子产生装置的磁场装置。 电子群体具有电子数密度（> 10×10 -3 cm -3至10 14 cm -3 -3 / ），在低压（<10Torr）的区域中的自由电子能量（> 0.01eV至<5eV），使得通过电子群体的离子的预定路径长度（1-4cm）， 干扰离子将优先通过解离复合过程减弱。 离子束（40）然后通过质量分析器（42），并且通过离子检测器（44）检测已经根据其质荷比分离的离子。

公开(公告)号：US06633041B2

公开(公告)日：2003-10-14

申请号：US10245656

申请日：2002-09-16

Applicant: Thomas E. Felter

Inventor： Thomas E. Felter

IPC: H01J4914

CPC classification number: H01J49/147 ,  H01J1/3042 ,  H01J49/08 ,  H01J49/4215 ,  H01J2201/30407

Abstract: An improved quadrupole mass spectrometer is described. The improvement lies in the substitution of the conventional hot filament electron source with a cold cathode field emitter array which in turn allows operating a small QMS at much high internal pressures then are currently achievable. By eliminating of the hot filament such problems as thermally “cracking” delicate analyte molecules, outgassing a “hot” filament, high power requirements, filament contamination by outgas species, and spurious em fields are avoid all together. In addition, the ability of produce FEAs using well-known and well developed photolithographic techniques, permits building a QMS having multiple redundancies of the ionization source at very low additional cost.

Abstract translation: 描述了改进的四极质谱仪。 改进之处在于用冷阴极场发射体阵列代替传统的热丝电子源，该冷阴极场发射器阵列又允许在很高的内部压力下操作小的QMS，然后目前是可实现的。 通过消除热丝，诸如热“裂解”精细的分析物分子，排除“热”丝，高功率需求，排气物质的细丝污染和杂散电场等问题都避免在一起。 此外，使用已知和发展良好的光刻技术生产FEA的能力允许以非常低的附加成本构建具有多个电离源冗余的QMS。