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    NMR apparatus comprising a superconducting magnet assembly and cooled probe components
    42.
    发明授权
    NMR apparatus comprising a superconducting magnet assembly and cooled probe components 有权

    公开(公告)号：US10175315B2

    公开(公告)日：2019-01-08

    申请号：US15673095

    申请日：2017-08-09

    申请人： Bruker BioSpin AG

    发明人： Joerg Hinderer ,  Robert Schauwecker

    IPC分类号： G01R33/38 ,  G01R33/3815

    CPC分类号： G01R33/3804 ,  G01R33/3403 ,  G01R33/3815 ,  H01F6/04

    摘要： A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.

    NMR PROBE COMPRISING A MULTI-PART LOWER INSERT PORTION
    43.
    发明申请
    NMR PROBE COMPRISING A MULTI-PART LOWER INSERT PORTION 审中-公开

    公开(公告)号：US20190004126A1

    公开(公告)日：2019-01-03

    申请号：US16023066

    申请日：2018-06-29

    申请人： Bruker BioSpin AG

    发明人： Roger Meister ,  Jonathan De Vries

    IPC分类号： G01R33/34 ,  G01R33/31 ,  G01R33/422

    CPC分类号： G01R33/3403 ,  G01R33/30 ,  G01R33/31 ,  G01R33/422

    摘要： A temperature-controlled NMR probe has a lower insert portion formed of multiple parts including two disc-shaped sub-elements that are not mechanically rigidly interconnected, lie flat against one another in the mounted state and are perpendicular to the z axis. The first sub-element (3.1), in terms of material and geometric structure, fulfils the function of electrically insulating the RF and HV lines fed through the lower insert portion, has an electrical conductivity sigma 100 N/mm2 and a melting temperature TS>250° C. This achieves high breaking strength and resistance to thermal stress while simultaneously attaining required RF and HV properties.

    CRYOSTAT ARRANGEMENT COMPRISING A NECK TUBE HAVING A SUPPORTING STRUCTURE AND AN OUTER TUBE SURROUNDING THE SUPPORTING STRUCTURE TO REDUCE THE CRYOGEN CONSUMPTION
    45.
    发明申请
    CRYOSTAT ARRANGEMENT COMPRISING A NECK TUBE HAVING A SUPPORTING STRUCTURE AND AN OUTER TUBE SURROUNDING THE SUPPORTING STRUCTURE TO REDUCE THE CRYOGEN CONSUMPTION 审中-公开

    公开(公告)号：US20180283769A1

    公开(公告)日：2018-10-04

    申请号：US15935826

    申请日：2018-03-26

    申请人： Bruker BioSpin AG

    发明人： Patrick WIKUS ,  Steffen BONN

    IPC分类号： F25D23/06 ,  F25B19/00 ,  F25D19/00

    摘要： A cryostat arrangement (1) with a vacuum tank (2) and a cryogenic tank (3) are provided. The vacuum tank has at least one neck tube, (4) leading to the cryogenic tank, with a supporting structure (4a) and an outer tube (4b) surrounding the supporting structure. The neck tube provides a connection from the cryogenic tank to a region outside the vacuum tank to allow cryogenic fluid to flow from the cryogenic tank into a region outside the vacuum tank or vice versa. The neck tube mechanically suspends the cryogenic tank inside the vacuum tank, and parts of the neck tube form a diffusion barrier between the interior of the cryogenic tank and the interior of the vacuum tank. The neck tube can connect to other components of the cryostat arrangement in a fluid-tight manner. Heat input from the neck tubes into the cryogenic tank can be considerably reduced thereby.

    NMR APPARATUS COMPRISING A SUPERCONDUCTING MAGNET ASSEMBLY AND COOLED PROBE COMPONENTS
    47.
    发明申请
    NMR APPARATUS COMPRISING A SUPERCONDUCTING MAGNET ASSEMBLY AND COOLED PROBE COMPONENTS 审中-公开

    公开(公告)号：US20180045797A1

    公开(公告)日：2018-02-15

    申请号：US15673095

    申请日：2017-08-09

    申请人： Bruker BioSpin AG

    发明人： Joerg HINDERER ,  Robert SCHAUWECKER

    IPC分类号： G01R33/38 ,  G01R33/3815

    CPC分类号： G01R33/3804 ,  G01R33/3403 ,  G01R33/3815 ,  H01F6/04

    摘要： A superconducting magnet assembly includes a cryostat, a vacuum vessel and a refrigeration stage. An NMR probe using the assembly includes comprises cooled probe components, a two-stage cryocooler, and a counter flow heat exchanger. A cooling circuit guides coolant from one outlet of the counter flow heat exchanger back to an inlet of the counter flow heat exchanger via the second cooling stage, a cooled probe component, and a heat exchanger in the cryostat or a heat exchanger in a helium suspension tube. Both the intake temperature of the coolant flowing into the heat exchanger in the cryostat or in the suspension tube and the return flow temperature of the emerging coolant are at least 5 K lower than the operating temperature of the first cooling stage. Excess cooling capacity of the cryocooler reduces the evaporation rate of liquid helium or cools a superconducting magnet in a cryogen-free cryostat.

    HF COIL ASSEMBLY
    48.
    发明申请
    HF COIL ASSEMBLY 有权

    公开(公告)号：US20180003782A1

    公开(公告)日：2018-01-04

    申请号：US15639380

    申请日：2017-06-30

    申请人： Bruker BioSpin AG

    发明人： Alia HASSAN ,  Nicolas FREYTAG

    IPC分类号： G01R33/34 ,  G01R33/341 ,  G01R33/36 ,  G01R33/44 ,  G01V3/14

    摘要： An HF coil assembly for generating independent alternating magnetic fields in an examination volume of a magnetic resonance apparatus is presented, the HF coil assembly comprising a first coil pair of saddle coils and a second coil pair of saddle coils, each saddle coil having longitudinal conductor elements and curved conductor elements arranged along a common lateral surface of a circular cylinder having a cylinder axis. Each coil pair comprises curved conductor elements and longitudinal conductor elements which are interconnected at a high frequency. The saddle coils also have diagonal conductor elements and/or bridge elements that connect the longitudinal and curved conductor elements. The coil pairs are opposite to each other relative to the cylinder axis.

    Actively shielded, cylindrical gradient coil system with passive RF shielding for NMR devices
    49.
    发明授权
    Actively shielded, cylindrical gradient coil system with passive RF shielding for NMR devices 有权

    公开(公告)号：US09817096B2

    公开(公告)日：2017-11-14

    申请号：US14217557

    申请日：2014-03-18

    申请人： BRUKER BIOSPIN AG

    发明人： Nicolas Freytag

    IPC分类号： G01R33/421 ,  G01R33/385

    CPC分类号： G01R33/4215 ,  G01R33/3858

    摘要： A gradient coil system has a cylindrical section in a central region, which contains no conductor elements and has a maximum outer radius that is larger than a minimum inner radius of conductor elements of a main gradient coil. An outer radius of this cylindrical section is only insubstantially smaller or equal in size to a minimum inner radius of a shielding coil in this axial range. The free space in the center of the gradient coil system is used to insert a passive RF shield, whose radius in a central region becomes larger over a certain length than its radius in outer regions. The RF shield is constructed from at least three partial sections, which are electrically interconnected. The actively shielded gradient coil system maximizes the volume of the RF region without loss of gradient coil system performance.