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EP3993008A1 - Multipôle pourvu de bague de réception agencée sur sa face avant, ainsi que bague de réception - Google Patents

Multipôle pourvu de bague de réception agencée sur sa face avant, ainsi que bague de réception Download PDF

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Publication number
EP3993008A1
EP3993008A1 EP21202121.6A EP21202121A EP3993008A1 EP 3993008 A1 EP3993008 A1 EP 3993008A1 EP 21202121 A EP21202121 A EP 21202121A EP 3993008 A1 EP3993008 A1 EP 3993008A1
Authority
EP
European Patent Office
Prior art keywords
shaped
shells
multipole
electrode half
receiving ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21202121.6A
Other languages
German (de)
English (en)
Inventor
Roman Knutas
Carsten Laser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vacutec Hochvakuum & Praez GmbH
Vacutec Hochvakuum- & Prazisionstechnik GmbH
Original Assignee
Vacutec Hochvakuum & Praez GmbH
Vacutec Hochvakuum- & Prazisionstechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vacutec Hochvakuum & Praez GmbH, Vacutec Hochvakuum- & Prazisionstechnik GmbH filed Critical Vacutec Hochvakuum & Praez GmbH
Publication of EP3993008A1 publication Critical patent/EP3993008A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/02—Details
    • H01J49/06—Electron- or ion-optical arrangements
    • H01J49/068—Mounting, supporting, spacing, or insulating electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J49/00—Particle spectrometers or separator tubes
    • H01J49/02—Details
    • H01J49/06—Electron- or ion-optical arrangements
    • H01J49/062—Ion guides
    • H01J49/063—Multipole ion guides, e.g. quadrupoles, hexapoles

Definitions

  • the invention relates to a multipole with receiving rings arranged on its end faces for accommodating the multipole in a mass spectrometer according to the preamble of claim 1, wherein the multipole has two half-electrode shells, each with at least two electrodes, which can be joined via positive-locking connections which are on the longitudinal edges of the half-electrode shells are arranged.
  • each of the form-fitting connections comprises a shaped piece and a counter-shaped piece adapted thereto, the shaped piece being formed on one of the two electrode half-shells and the counter-shaped piece on the other of the two electrode half-shells.
  • the invention relates to a receiving ring for such a multipole according to the preamble of claim 8.
  • Multipoles are multi-pole electrode devices and are well known, for example from the German patent specification EN 944900 .
  • a precise alignment of the electrodes of the electrode device to one another is essential for the analytical measurement accuracy, so that the electrodes are regularly attached to a carrier element designed as a half-shell.
  • Such half-shells can be assembled with high accuracy, so that a high analytical measurement accuracy of a mass spectrometer can be achieved.
  • Figures 1 to 3 show the conventional structure of a known multipole 10 with mounting rings 12, 14 attached to the face of the multipole for receiving the multipole in a mass spectrometer, not shown, wherein 1 an exploded view of the multipole 10 together with the two receiving rings 12, 14, 2 a perspective view of an assembled multipole 10 together with the receiving rings 12, 14 according to 1 and 3 shows a perspective view of an assembled multipole 10 with receiving rings 12, 14 removed.
  • This conventional multipole 10 has two electrode half-shells 16, 18, each having two rod-shaped electrodes 20, 22 and 24, 26, which are fixed in pairs on a carrier 28, 30 with insulating bodies 32, 36, 38 being interposed.
  • the lower electrode half-shell 16 can be joined to the upper electrode half-shell 18 via positive connections 40, 42, 44, which are arranged on the longitudinal edges 46, 48, 50, 52 of the electrode half-shells 16, 18.
  • longitudinal edge is not to be understood in one dimension, but rather to be understood in such a way that the longitudinal edges 46 , 48 , 50 , 52 form narrow areas whose width corresponds to the thickness of the carrier 28 , 30 .
  • each of these form-fitting connections 40, 42, 44 comprises a shaped piece 54, 56, 58 with a roof edge structure on the lower half-electrode shell 16 and a counter-shaped piece 60, 62, 64 adapted thereto with a prismatic structure on the upper half-electrode shell 18.
  • the electrode half-shells 16, 18 have the same structure and shape. Therefore, the lower electrode half-shell 16 also has counter-shaped pieces 66, 68, 70 on its rear longitudinal edges 48, which are formed with corresponding shaped pieces (not visible in the figures) on the rear longitudinal edge 52 of the upper electrode half-shell 18 and form further form-fitting connections in pairs.
  • a form-fitting connection is to be understood as meaning a connection which excludes a relative displacement of two components at least in one dimension.
  • the form-fitting connections described here with the shaped piece and counter-shaped piece are designed in such a way that the two electrode half-shells 16, 18 can still be moved in the longitudinal direction of the multipole 10 after they have been joined together, for as long as the screws 72, 74, 76, 78, 80, 82 cannot are mounted.
  • a displacement of the electrode half-shells 16, 18 in the radial direction of the multipole 10 is not possible thanks to these form-fitting connections.
  • the two front and rear end faces 84, 86 are closed off by the receiving rings 12, 14, which are clamped by rotating the receiving rings 12, 14 on clamping lugs 88 provided on the electrode half-shells 16, 18.
  • These receiving rings 12, 14 are used to hold the multipole 10 in the mass spectrometer.
  • the alignment and positioning of the multipole 10 in the mass spectrometer can therefore only take place with an accuracy limited by the fastening of the receiving rings 12, 14 on the multipole 10.
  • a high degree of accuracy can therefore only be achieved with a great deal of processing effort.
  • the invention is therefore based on the object of making it possible to record a multipole in a mass spectrometer with high accuracy but at the same time with little effort.
  • the invention solves this problem with the features of a multipole according to claim 1 and with a receiving ring with the features according to claim 8.
  • the multipole according to the invention therefore has receiving rings arranged on its end faces for accommodating the multipole in a mass spectrometer, the multipole having two electrode half-shells, each with at least two electrodes, which can be joined together via positive-locking connections which are arranged on the longitudinal edges of the electrode half-shells, each positive-locking Connection comprises a shaped piece and a counter-shaped piece adapted thereto, wherein the shaped piece is formed on one of the two electrode half-shells and the counter-shaped piece on the other of the two electrode half-shells.
  • Each of the receiving rings has two shaped receiving rings, each of the two shaped receiving rings being able to be joined to a counter-shaped piece molded onto one of the two electrode half-shells and the other of the two shaped receiving rings being able to be joined to a counter-moulded piece molded onto the other of the two electrode half-shells.
  • the receiving ring according to the invention for such a multipole therefore has two shaped receiving ring pieces which are designed in such a way that they can be joined together with correspondingly designed counter-shaped pieces molded onto the half-shells of the electrodes.
  • the receiving rings can also form form-fitting connections with the electrode half-shells that fit precisely, which ensure high accuracy when installing the multipole in the mass spectrometer with little installation effort.
  • This structure of the receiving rings and the multipole enables the shaped parts and counter-shaped parts of the electrode half-shells to be manufactured by grinding the electrodes together with the shaped parts and counter-shaped parts of the electrode half-shells.
  • the mating pieces on the half-shells of the electrodes are manufactured with the high accuracy of the electrodes.
  • the counter-shaped pieces, in which the receiving ring shaped pieces engage are machined with the high precision of the electrodes. This processing takes place in a common processing step and is therefore possible with minimal effort.
  • the surfaces of the mounting ring fittings can be manufactured separately with high accuracy, for example by milling the mounting rings.
  • the invention therefore makes it possible to achieve very high accuracy of the recordings of the multipole in the mass spectrometer with relatively little effort.
  • the counter-shaped piece of one of the electrode half-shells which can be joined together with a shaped receiving ring, is preferably part of one of the form-fitting connections for joining the two electrode half-shells to one another. This is advantageous because a counter-shaped piece of the electrode half-shells can also be used to connect a receiving ring to the multipole and therefore no separate additional counter-shaped piece has to be provided on the multipole for assembly with a receiving ring.
  • An alternative embodiment of the invention provides that the counter-shaped piece of one of the electrode half-shells, which can be joined together with a receiving ring shaped piece, is formed separately from the counter-shaped pieces of the electrode half-shells, which are provided for the form-fitting connections for joining the two electrode half-shells together.
  • a development of the invention provides that the shaped pieces each have a roof edge structure and the counter-shaped pieces each have a prismatic structure, so that one shaped piece and the counter-shaped piece assembled with it form a roof edge and prism connection.
  • the invention has recognized that flat structures of this type can be ground with high accuracy and little effort, and that reliable and precise positioning of the parts to be joined is nevertheless possible.
  • each shaped piece can be screwed to the counter-shaped piece assembled with it by means of a screw to form a screw connection.
  • screw connections have proven to be particularly reliable.
  • each half-shell of the electrode has several, preferably three, counter-shaped pieces on a longitudinal edge, with the two outer counter-shaped pieces each having two bores for screws. Each of the two outer screws can be screwed to a different one of the two receiving ring shaped pieces. Furthermore, a development of the invention provides that the shaped pieces on the electrode half-shells and the receiving ring shaped pieces each have a threaded hole for receiving one of the screws. This construction can be manufactured with little effort and assembled with little effort and is therefore particularly advantageous.
  • a further development of the invention provides that the shaped pieces of the receiving ring are formed rotationally symmetrically on the respective receiving ring.
  • the receiving ring shaped pieces are preferably arranged rotationally symmetrically by 180°. Thanks to this design, identical mounting rings can be used on both end faces in an advantageous manner.
  • the electrode half-shells to be constructed in the same way. That is to say, the upper half-shell of the electrode is designed in exactly the same way as the lower half-shell of the electrode.
  • both mounting rings are the same and are rotationally symmetrical by 180°. Because of these configurations, only one type of half-shell electrode and only one type of receiving ring is required for a multipole to be produced. It is therefore not necessary to produce and store two different electrode half-shells or two different receiving rings. This reduces the production and storage costs while at the same time the identical quality of the structurally identical parts.
  • FIGs 4 to 6 show an embodiment of a multipole 110 according to the invention with receiving rings 112, 114 attached to the front side of the multipole 110 for receiving the multipole 110 in a mass spectrometer, not shown.
  • 4 shows an exploded view of this multipole 110 together with the two mounting rings 112, 114.
  • figure 5 shows a perspective view of the assembled multipole 110 together with the receiving rings 112, 114 according to FIG 4 .
  • 6 shows a perspective view of the assembled multipole 110, but with the receiving rings 112, 114 removed.
  • the multipole 110 has two electrode half-shells 116, 118. Each of these electrode half-shells 116, 118 has a plurality of rod-shaped electrodes 120, 122 and 124, 126, namely two in the example. One pair of these electrodes 120, 122 or 124, 126 is attached to a carrier 128, 130 with insulating bodies 132, 136, 138 being connected in between. These insulating bodies 132, 136, 138 electrically insulate the electrodes 120, 122, 124, 126 from the carriers 128, 130.
  • the insulating bodies 132, 136, 138 can be made of quartz or quartz glass, for example.
  • Each of the carriers 128, 130 is essentially shaped like a recessed and perforated semi-hollow cylinder, ie a hollow cylinder cut open in the longitudinal direction.
  • These carriers 128, 130 are made of metal or a metal alloy and are electrically conductive and have a predetermined wall thickness.
  • the electrodes 120, 122, 124, 126 are each formed in three parts in the illustrated embodiment. They each have a longer central section and two shorter outer sections. The outer sections are used, for example, to form a prefilter and a postfilter. Alternatively, the electrodes 120, 122, 124, 126 (contrary to the exemplary embodiment shown) can each be formed in one piece.
  • the lower electrode half-shell 116 can be joined to the upper electrode half-shell 118 via positive connections 140, 142, 144, which are arranged along the longitudinal edges 146, 148, 150, 152 of the electrode half-shells 116, 118. As already explained above, these longitudinal edges 146, 148, 150, 152 form narrow surfaces, the width of which corresponds to the wall thickness of the supports 128, 130.
  • each of these positive connections 140, 142, 144 shown, as well as the non-represented positive connections comprises a shaped piece 154, 156, 158 with a roof edge structure on the lower electrode half-shell 116 and a counter-shaped piece 160, 162, 164 adapted thereto with a prismatic structure on the upper electrode half-shell 118 .
  • the electrode half-shells 116, 118 are each structured and shaped in the same way. Therefore, the lower electrode half-shell 116 also has counter-shaped pieces 166, 168, 170 on its rear longitudinal axis 148, which are provided with corresponding (in the Figures 4 to 6 (not visible) shaped pieces are formed on the rear longitudinal edge 152 of the upper electrode half-shell 118 and each form pairs of further form-fitting connections (not designated separately). These positive connections are secured with screws 172, 174, 176, 178, 180, 182.
  • a receiving ring 112 is provided on the front face 184 .
  • a receiving ring 114 is provided on the rear end face 186 in a corresponding manner.
  • the attachment of these receiving rings 112, 114 on the multipole 110 differs significantly from the prior art according to the Figures 1 to 3 away. Namely, two receiving ring fittings 190, 194, 196 are provided on each of the receiving rings 112, 114.
  • one of its two receiving ring shaped pieces 190 or 194 can be joined with a counter-shaped piece 160 or 164 which is molded onto one of the two electrode half-shells 118, and the other of the two receiving ring shaped pieces 196 can be joined with a on the other of the two electrode half-shells 118 formed - counter-moulded piece 166 or 170 can be assembled.
  • the counter-shaped piece 160 of the electrode half-shell 118 that can be assembled with the receiving ring shaped piece 190 of the receiving ring 112 is part of the positive connection 140 with which the electrode half-shells 116, 118 are connected.
  • a further shaped piece of the receiving ring, not shown, of the receiving ring 112 is joined to the counter-shaped piece 166 of the electrode half-shell 116 and is also part of a form-fitting connection of the two electrode half-shells 116, 118.
  • the counter-shaped piece 164 of the electrode half-shell 118 that can be joined together with the receiving ring shaped piece 194 of the receiving ring 114 is part of the positive connection 144 with which the electrode half-shells 116, 118 are connected.
  • the further shaped piece 196 of the receiving ring of the receiving ring 114 is joined to the counter-shaped piece 170 of the electrode half-shell 118 and is also part of a form-fitting connection of the two electrode half-shells 116, 118.
  • the receiving ring shaped pieces 190, 194, 196 of the receiving rings 112, 114 each have a roof edge structure and can be combined with the prism structures of the counter-shaped pieces 160, 164, 166, 170 to form roof edge and prism connections.
  • a form-fitting connection is to be understood as meaning a connection which excludes a relative displacement of two components at least in one dimension, so that the form-fitting connections described here are formed from a molded piece to a counter-shaped piece in such a way that the receiving rings 112, 114 can still be moved in the longitudinal direction of the multipole 110 after assembly with the electrode half-shells 116, 118, as the screws 172, 174, 176, 178, 180, 182 are not yet mounted.
  • such a displacement of the electrode half-shells 116, 118 and the receiving rings 112, 114 in the radial direction of the multipole 110 is not possible even then, thanks to these form-fitting connections. After tightening these screws, displacements in the longitudinal direction of the multipole 110 are also excluded.
  • the attachment of the receiving rings 112, 114 to the multipole 110 according to the invention contributes to the fact that the alignment and positioning of the multipole 110 in a mass spectrometer can be carried out with very high accuracy, since the surfaces of the roof edge structures and prism structures are manufactured with very high accuracy and at the same time little effort be able.
  • the prism structures of the mating pieces 160, 164, 166, 170 on the electrode half-shells 116, 118 are namely ground together with the electrodes, this grinding being a highly precise machining process with an accuracy in the range of a few micrometers.
  • the surfaces of the receiving ring shaped pieces 190, 194, 196 of the receiving rings 112, 114 cannot be ground at the same time, they can also be machined with high precision in a separate machining step.
  • the invention therefore allows receiving rings to be provided for receiving a multipole in a mass spectrometer, which ensure a high degree of accuracy in the positioning and alignment of the multipole in the mass spectrometer.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
EP21202121.6A 2020-10-30 2021-10-12 Multipôle pourvu de bague de réception agencée sur sa face avant, ainsi que bague de réception Pending EP3993008A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020128646.5A DE102020128646B4 (de) 2020-10-30 2020-10-30 Multipol mit an seinen Stirnseiten angeordneten Aufnahmeringen sowie derartiger Aufnahmering

Publications (1)

Publication Number Publication Date
EP3993008A1 true EP3993008A1 (fr) 2022-05-04

Family

ID=78087279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21202121.6A Pending EP3993008A1 (fr) 2020-10-30 2021-10-12 Multipôle pourvu de bague de réception agencée sur sa face avant, ainsi que bague de réception

Country Status (3)

Country Link
US (1) US11527396B2 (fr)
EP (1) EP3993008A1 (fr)
DE (1) DE102020128646B4 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114999888B (zh) * 2022-06-28 2025-07-18 天津国科医疗科技发展有限公司 一种四极杆质量分析器的装配装置以及装配方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944900C (de) 1953-12-24 1956-06-28 Wolfgang Paul Dr Ing Verfahren zur Trennung bzw. zum getrennten Nachweis von Ionen verschiedener spezifischer Ladung
EP0572687A1 (fr) * 1992-05-26 1993-12-08 Finnigan Corporation Filtre ionique, en particulier pour spectre de masse, et méthode de réalisation de celui-ci
US20100276063A1 (en) * 2009-05-02 2010-11-04 Henry Hoang Xuan Bui Methods of manufacturing quadrupole mass filters
US20110016700A1 (en) * 2009-07-24 2011-01-27 Bert David Egley Linear ion processing apparatus with improved mechanical isolation and assembly
EP2804201A2 (fr) * 2013-05-13 2014-11-19 Thermo Finnigan LLC Composants optiques ioniques et leur procédé de fabrication
EP2860752A1 (fr) * 2013-10-11 2015-04-15 Vacutec Hochvakuum- & Präzisionstechnik GmbH Dispositif d'électrodes doté de pré- et/ou de post-filtre et son procédé de fabrication et spectromètre de masse doté d'un tel dispositif d'électrodes
EP3385979A1 (fr) 2017-04-03 2018-10-10 Vacutec Hochvakuum- & Präzisionstechnik GmbH Dispositif multipolaire doté d'un dispositif de maintien destiné à maintenir le dispositif multipolaire, dispositif de maintien d'un dispositif multipolaire, spectromètre de masse doté d'un tel dispositif multipolaire, unité de montage destinée au positionnement du dispositif multipolaire et procédé de positionnement d'un dispositif de maintien par rapport à un dispositif multipolaire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004054835A1 (de) * 2004-11-12 2006-05-24 VACUTEC Hochvakuum- & Präzisionstechnik GmbH Verfahren zur Herstellung einer Elektrode bzw. mehrpoligen Elektrodenanordnung sowie mehrpolige Elektrodenanordnung und Elektrode für eine mehrpolige Elektrodenanordnung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944900C (de) 1953-12-24 1956-06-28 Wolfgang Paul Dr Ing Verfahren zur Trennung bzw. zum getrennten Nachweis von Ionen verschiedener spezifischer Ladung
EP0572687A1 (fr) * 1992-05-26 1993-12-08 Finnigan Corporation Filtre ionique, en particulier pour spectre de masse, et méthode de réalisation de celui-ci
US20100276063A1 (en) * 2009-05-02 2010-11-04 Henry Hoang Xuan Bui Methods of manufacturing quadrupole mass filters
US20110016700A1 (en) * 2009-07-24 2011-01-27 Bert David Egley Linear ion processing apparatus with improved mechanical isolation and assembly
EP2804201A2 (fr) * 2013-05-13 2014-11-19 Thermo Finnigan LLC Composants optiques ioniques et leur procédé de fabrication
EP2860752A1 (fr) * 2013-10-11 2015-04-15 Vacutec Hochvakuum- & Präzisionstechnik GmbH Dispositif d'électrodes doté de pré- et/ou de post-filtre et son procédé de fabrication et spectromètre de masse doté d'un tel dispositif d'électrodes
EP3385979A1 (fr) 2017-04-03 2018-10-10 Vacutec Hochvakuum- & Präzisionstechnik GmbH Dispositif multipolaire doté d'un dispositif de maintien destiné à maintenir le dispositif multipolaire, dispositif de maintien d'un dispositif multipolaire, spectromètre de masse doté d'un tel dispositif multipolaire, unité de montage destinée au positionnement du dispositif multipolaire et procédé de positionnement d'un dispositif de maintien par rapport à un dispositif multipolaire

Also Published As

Publication number Publication date
DE102020128646B4 (de) 2024-10-24
US11527396B2 (en) 2022-12-13
US20220139689A1 (en) 2022-05-05
DE102020128646A1 (de) 2022-05-05

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