Abstract: A multipole with mounting rings arranged on its end faces for mounting the multipole in a mass spectrometer includes two electrode half-shells each having at least two electrodes joinable together by positive-fitting connections on the electrode half-shell longitudinal edges. Each positive-fitting connection includes a fitting and a matching mating fitting, the fitting integrally formed on one electrode half-shell and the mating fitting integrally formed on the other electrode half-shell. Each mounting ring has two mounting ring fittings. One mounting ring fitting can be joined to a mating fitting integrally formed on one of the two electrode half-shells and the other of the two mounting ring fittings can be joined to a mating fitting integrally formed on the other of the two electrode half-shells. Furthermore, a mounting ring for such a multipole has two mounting ring fittings joinable to corresponding mating fittings integrally formed on the electrode half-shells.

Abstract: A multipole with mounting rings arranged on its end faces for mounting the multipole in a mass spectrometer includes two electrode half-shells each having at least two electrodes joinable together by positive-fitting connections on the electrode half-shell longitudinal edges. Each positive-fitting connection includes a fitting and a matching mating fitting, the fitting integrally formed on one electrode half-shell and the mating fitting integrally formed on the other electrode half-shell. Each mounting ring has two mounting ring fittings. One mounting ring fitting can be joined to a mating fitting integrally formed on one of the two electrode half-shells and the other of the two mounting ring fittings can be joined to a mating fitting integrally formed on the other of the two electrode half-shells. Furthermore, a mounting ring for such a multipole has two mounting ring fittings joinable to corresponding mating fittings integrally formed on the electrode half-shells.

Abstract: The invention relates to a multipole (32) with a holding device (10) for holding the multipole (32), for example a quadrupole in a mass spectrometer or on a mounting unit (40), wherein the holding device (10) is arranged on the multipole (32). For attaching the multipole (32) to a receiving device (36, 36a) for receiving the holding device (10), the holding device (10) has one or more planar supporting surfaces (13, 15). The holding device (10) is attached to surfaces (30) of the multipole (32) that are manufactured together with electrodes (26A, 26B) of the multipole (32) in one work step. Furthermore, the invention relates to a holding device (10) of such a multipole (32), a mass spectrometer with such a multipole (32), a mounting unit (40) with a receiving device (36, 36a) for positioning a holding device (10) relative to such a multipole (32) and a method for positioning a holding device (10) relative to the multipole (32).

Abstract: The invention relates to a multipole (32) with a holding device (10) for holding the multipole (32), for example a quadrupole in a mass spectrometer or on a mounting unit (40), wherein the holding device (10) is arranged on the multipole (32). For attaching the multipole (32) to a receiving device (36, 36a) for receiving the holding device (10), the holding device (10) has one or more planar supporting surfaces (13, 15). The holding device (10) is attached to surfaces (30) of the multipole (32) that are manufactured together with electrodes (26A, 26B) of the multipole (32) in one work step. Furthermore, the invention relates to a holding device (10) of such a multipole (32), a mass spectrometer with such a multipole (32), a mounting unit (40) with a receiving device (36, 36a) for positioning a holding device (10) relative to such a multipole (32) and a method for positioning a holding device (10) relative to the multipole (32).

Abstract: A method manufactures a multipolar electrode device, in particular a multipole for use in a mass spectrometer, wherein the electrode device includes at least one main filter and at least one pre- and/or postfilter. The electrode blanks are separated in several sections for producing the pre- and/or postfilters, which are thereby maintained by a holder in a constant relative position to each other. Moreover, an electrode device may be used in a mass spectrometer and a mass spectrometer may have such a multipolar electrode device.

Abstract: A sealing surface, in particular for a vacuum chamber of a mass spectrometer and an associated manufacturing process, has non-circular shapes and can be produced with low effort. The sealing surface has circumferential cracks, being produced by erosion or jet machining or indentation-forming. A method manufactures such a sealing surface, a component has such a sealing surface, a vacuum chamber is made of components with such sealing surfaces and a mass spectrometer has such a vacuum chamber. In the prior art annular sealing surfaces are produced by turning. Milling permits a non-annular embodiment but is disadvantageous in case of sealing.

Abstract: A method manufactures a multipolar electrode device, in particular a multipole for use in a mass spectrometer, wherein the electrode device includes at least one main filter and at least one pre- and/or postfilter. The electrode blanks are separated in several sections for producing the pre- and/or postfilters, which are thereby maintained by a holder in a constant relative position to each other. Moreover, an electrode device may be used in a mass spectrometer and a mass spectrometer may have such a multipolar electrode device.

Abstract: A method for the production of a multipolar electrode configuration (1) for focussing or mass filtration of a beam of charged particles includes attaching a number of round-pole shaped electrode blanks (9)—but only a fraction of the total number of electrodes (2) required for said electrode configuration (1)—to one or a number of support elements (4); simultaneous processing of the end parts (6) of the support element(s) (4) and of the electrode blanks (9) attached to the support element(s) (4) in one process step in such a way that each electrode blank (9) is processed into an electrode (2) with a cross section, having a circular section (KA) and a non-circular, section (HA), and at the end of said simultaneous processing the support element(s) (4) having two differently shaped end parts (6), whereby the respective shapes of said end parts (6) are adapted to each other.