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公开(公告)号：US11101123B2
公开(公告)日：2021-08-24
申请号：US15999488
申请日：2017-02-17
发明人： David Dowsett
IPC分类号： H01J49/46 , H01J49/06 , H01J49/14 , G01N23/2258
摘要： The invention is directed to mass spectrometer comprising an extraction system for secondary ions. The system comprises: an inner spherical deflecting sector; an outer spherical deflecting sector; a deflecting gap formed between the sectors; a housing in which the sectors are arranged. The deflecting sectors (42; 44) are biased at retarding gap (46). The system further comprises an exit disc electrode with an exit through hole centered about the exit axis, the intermediate electrode being biased at an intermediate voltage between the voltage of the housing and the average voltage of the sectors. The trajectories of the secondary ions become more parallel to the exit axis and become closer to the axis.
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2.发明申请公开(公告)号：US20200058480A1
公开(公告)日：2020-02-20
申请号：US15999488
申请日：2017-02-17
发明人： David Dowsett
IPC分类号： H01J49/06 , H01J49/14 , G01N23/2258
摘要： The invention is directed to mass spectrometer comprising an extraction system for secondary ions. The system comprises: an inner spherical deflecting sector; an outer spherical deflecting sector; a deflecting gap formed between the sectors; a housing in which the sectors are arranged. The deflecting sectors (42; 44) are biased at retarding gap (46). The system further comprises an exit disc electrode with an exit through hole centered about the exit axis, the intermediate electrode being biased at an intermediate voltage between the voltage of the housing and the average voltage of the sectors. The trajectories of the secondary ions become more parallel to the exit axis and become closer to the axis.
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公开(公告)号：US11204397B2
公开(公告)日：2021-12-21
申请号：US16317306
申请日：2017-07-17
发明人： Rachid Barrahma , Olivier Bouton , David Dowsett , Tom Wirtz
摘要： A Hall probe comprising a Hall effect sensing element. The probe is capable of precisely measuring the strength of a magnetic field in high-voltage and vacuum environments.
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公开(公告)号：US20210104394A1
公开(公告)日：2021-04-08
申请号：US17050098
申请日：2019-04-24
发明人： Marina Verruno , David Dowsett , Tom Wirtz
摘要： A secondary ion mass spectrometer comprising a primary ion beam device, and means for collecting, mass filtering and subsequently detecting secondary ions released from a sample due to the sample having been impacted by a plurality of primary ion beams. The secondary ion mass spectrometer is remarkable in that it uses a plurality of primary ion beams in parallel for scanning the surface of the sample.
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公开(公告)号：US10770278B2
公开(公告)日：2020-09-08
申请号：US15999490
申请日：2017-02-17
发明人： David Dowsett
IPC分类号： H01J49/06 , G01N23/2258 , H01J49/14
摘要： The invention is directed to mass spectrometer comprising an extraction system for secondary ions. The system comprises: an inner spherical deflecting sector; an outer spherical deflecting sector; a deflecting gap formed between the sectors; a housing in which the sectors are arranged. The deflecting sectors are biased at retarding potentials in order to reduce the energy of the ion beam entering the deflecting gap. The system further comprises an exit disc electrode which is biased at the midvoltage of the average voltage of the sectors, and two side plates both facing the spherical sectors, the side plates being biased in order to create an electrostatic field perpendicular to the exit axis.
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公开(公告)号：US20190302197A1
公开(公告)日：2019-10-03
申请号：US16317306
申请日：2017-07-17
发明人： Rachid Barrahma , Olivier Bouton , David Dowsett , Tom Wirtz
摘要： A Hall probe comprising a Hall effect sensing element. The probe is capable of precisely measuring the strength of a magnetic field in high-voltage and vacuum environments.
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公开(公告)号：US20190057853A1
公开(公告)日：2019-02-21
申请号：US16076385
申请日：2017-02-07
发明人： Roch Andrzejewski , Rachid Barrahma , David Dowsett , Tom Wirtz
摘要： An electromagnet assembly suitable for mass spectrometer comprising one yoke; and two pole pieces; the pole pieces being comprised in a vacuum chamber and being separated from each other by a pole piece gap defining a passage for the charged particles to be deflected; the yoke forming a bridge over the two pole pieces thus defining a magnetic circuit. The electromagnet assembly further comprises one electrical circuit for generating a magnetic flux in the magnetic circuit, the electrical circuit being included in the yoke. The electromagnet assembly is remarkable in that the pole pieces are electrically insulated from the electrical circuit and from the yoke by first electrical insulating means and are electrically insulated from the vacuum chamber.
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公开(公告)号：US10580635B2
公开(公告)日：2020-03-03
申请号：US16076385
申请日：2017-02-07
发明人： Roch Andrzejewski , Rachid Barrahma , David Dowsett , Tom Wirtz
摘要： An electromagnet assembly suitable for mass spectrometer comprising one yoke; and two pole pieces; the pole pieces being comprised in a vacuum chamber and being separated from each other by a pole piece gap defining a passage for the charged particles to be deflected; the yoke forming a bridge over the two pole pieces thus defining a magnetic circuit. The electromagnet assembly further comprises one electrical circuit for generating a magnetic flux in the magnetic circuit, the electrical circuit being included in the yoke. The electromagnet assembly is remarkable in that the pole pieces are electrically insulated from the electrical circuit and from the yoke by first electrical insulating means and are electrically insulated from the vacuum chamber.
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9.发明申请公开(公告)号：US20200058481A1
公开(公告)日：2020-02-20
申请号：US15999490
申请日：2017-02-17
发明人： David Dowsett
IPC分类号： H01J49/06 , G01N23/2258 , H01J49/14
摘要： The invention is directed to mass spectrometer comprising an extraction system for secondary ions. The system comprises: an inner spherical deflecting sector; an outer spherical deflecting sector; a deflecting gap formed between the sectors; a housing in which the sectors are arranged. The deflecting sectors are biased at retarding potentials in order to reduce the energy of the ion beam entering the deflecting gap. The system further comprises an exit disc electrode which is biased at the midvoltage of the average voltage of the sectors, and two side plates both facing the spherical sectors, the side plates being biased in order to create an electrostatic field perpendicular to the exit axis.
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公开(公告)号：US09564306B2
公开(公告)日：2017-02-07
申请号：US14760639
申请日：2014-01-07
发明人： Hung Quang Hoang , David Dowsett , Tom Wirtz
CPC分类号： H01J49/28 , H01J49/025 , H01J49/20 , H01J49/30
摘要： The present invention relates to a compact and portable mass spectrometer device comprising a source of ions, a non-scanning magnetic sector for separating ions originating at the source of ions according to their mass-to-charge ratios, and a detection means. The magnetic sector comprises an ion entrance plane and at least two ion exit planes, which allow to optimize the resolving power of the mass spectrometer for specific mass-to charge ratio sub-ranges.
摘要翻译： 本发明涉及一种包括离子源的紧凑且便携的质谱仪装置，以及用于根据其质荷比分离源自离子源的离子的非扫描磁性扇区和检测装置。 磁性部分包括离子入射面和至少两个离子出射平面，其允许优化用于特定质量 - 电荷比子范围的质谱仪的分辨能力。
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