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    SYSTEM AND METHOD FOR A CAVITY MAGNETOMETER USING A POUND-DREVER-HALL DETECTOR
    1.
    发明公开
    SYSTEM AND METHOD FOR A CAVITY MAGNETOMETER USING A POUND-DREVER-HALL DETECTOR 审中-公开

    公开(公告)号：EP3370076A1

    公开(公告)日：2018-09-05

    申请号：EP18157971.5

    申请日：2018-02-21

    申请人： Honeywell International Inc.

    发明人： SMICIKLAS, Marc ,  COMPTON, Robert ,  SALIT, Mary K.

    IPC分类号： G01R33/035

    CPC分类号： G01R33/032 ,  G01R33/035

    摘要： In one embodiment, a method is provided. The method comprises: spin polarizing alkali atoms in a cavity; shifting resonant frequencies of the cavity at a rate proportional to a magnitude of a magnetic field incident upon the cavity; reflecting modulated right hand circularly polarized light and modulated left hand circularly polarized light from the cavity; transforming the reflected modulated right hand circularly polarized light to reflected modulated vertically polarized light, and the reflected modulated left hand circularly polarized light to reflected modulated horizontally polarized modulated light; generating a first error signal having an amplitude proportional to the shift in a resonant frequency corresponding to the reflected modulated vertically polarized light and a sign indicative of whether a frequency of the reflected modulated vertically polarized light is above or below the corresponding resonant frequency; generating a second error signal having an amplitude proportional to the shift in a resonant frequency corresponding to the reflected modulated horizontally polarized light and a sign indicative of whether a frequency of the reflected modulated horizontally polarized light is above or below the corresponding resonant frequency; adjusting a carrier frequency of the modulated right hand circularly polarized light in response to the first error signal; adjusting a carrier frequency of the modulated left hand circularly polarized light in response to the second error signal; and generating a measured Larmor frequency.

    CAPTEUR MAGNÉTOMÉTRIQUE
    3.
    发明公开
    CAPTEUR MAGNÉTOMÉTRIQUE 审中-公开
    磁感应传感器

    公开(公告)号：EP3149504A1

    公开(公告)日：2017-04-05

    申请号：EP15725626.4

    申请日：2015-05-29

    申请人： THALES

    发明人： DESURVIRE, Emmanuel ,  CASTERA, Jean-Paul ,  DEMOTES-MAINARD, Bertrand

    IPC分类号： G01R33/035 ,  G01R33/00

    CPC分类号： G01R33/0041 ,  G01R33/0017 ,  G01R33/0047 ,  G01R33/035 ,  G01R33/0354

    摘要： The invention relates to a sensor (10) which includes a magnetic sensor (12) generating a response signal (V) when plunged into an external magnetic field (B
    ext ) creating an external flux (φ
    ext ) through said sensor. Said sensor includes: a control circuit (14) taking the response signal from the sensor as input and generating a feedback current (i
    CR ) as output; and a conductive wire (16) arranged in the vicinity of the sensor and connected to the output of the control circuit, the wire having the feedback current passing therethrough, the circuit and the conductive wire being such that a magnetic feedback field (B
    CR ) is created in which the flux through the sensor substantially compensates for the external flux at each instant, an output signal of the sensor being made up of the feedback current.

    摘要翻译： 本发明涉及一种传感器（10），它包括一个磁传感器（12），该磁传感器（12）在插入通过所述传感器产生外部磁通（φext）的外部磁场（Bext）时产生响应信号（V）。 所述传感器包括：控制电路（14），其将来自传感器的响应信号作为输入并产生作为输出的反馈电流（iCR）; 和布置在所述传感器附近并连接到所述控制电路的输出的导线（16），所述导线具有穿过其中的反馈电流，所述电路和所述导线使得磁反馈场（BCR）为 其中通过传感器的通量基本上补偿每一时刻的外部通量，传感器的输出信号由反馈电流组成。

    VERY EFFICIENT HEAT EXCHANGER FOR CRYOGEN FREE MRI MAGNET
    4.
    发明公开
    VERY EFFICIENT HEAT EXCHANGER FOR CRYOGEN FREE MRI MAGNET 审中-公开
    磁共振成像磁共振成像

    公开(公告)号：EP2761237A2

    公开(公告)日：2014-08-06

    申请号：EP12784334.0

    申请日：2012-09-26

    申请人： Koninklijke Philips N.V.

    发明人： ACKERMANN, Robert, Adolph ,  MENTEUR, Philippe ,  DHAR, Manmohan

    IPC分类号： F25B25/00 ,  F25D19/00 ,  F25B9/10

    CPC分类号： F25B9/002 ,  F25B9/10 ,  F25B25/005 ,  F25D19/00 ,  G01R33/035 ,  G01R33/3804 ,  G01R33/3815 ,  H01F6/04

    摘要： A heat exchanger (5) includes a thermally conductive cylindrical container (40), at least one thermally conductive tube (30), a cooling column (90), and a cryogen coldhead (100). The cooling column and coldhead condense gaseous helium to liquid helium to maintain a reservoir of liquid helium in the thermally conductive cylindrical container (40). The at least one thermally conductive tube (30) coils circumferentially around the container (40), and extends to at least one superconducting magnet coil heat exchanger (20), and back. The tube forms a selected loop which holds gaseous helium at pressure up about 104 bar (1500 PSI) or room temperature to about 0.75 bar at cryogenic temperatures.

    摘要翻译： 热交换器（5）包括导热圆柱形容器（40），至少一个导热管（30），冷却塔（90）和冷冻冷藏头（100）。 冷却塔和冷冻头将气态氦气冷凝成液氦，以在导热圆柱形容器（40）中保持液氦储存器。 所述至少一个导热管（30）绕所述容器（40）周向盘绕，并且延伸到至少一个超导磁体线圈换热器（20）并返回。 该管形成选定的回路，其在低温下在约104巴（1500PSI）或室温至约0.75巴的压力下保持气态氦。

    RF-SWITCHED SUPERCONDUCTING RESONATORS AND METHODS OF SWITCHING THEREOF
    6.
    发明公开
    RF-SWITCHED SUPERCONDUCTING RESONATORS AND METHODS OF SWITCHING THEREOF 审中-公开
    射频超导SWITCHED谐振器和切换方法有关

    公开(公告)号：EP2188651A2

    公开(公告)日：2010-05-26

    申请号：EP08799093.3

    申请日：2008-09-03

    申请人： Varian, Inc.

    发明人： WONG, Wai, Ha ,  WITHERS, Richard, Stacy ,  ANDERSON, Weston, A.

    IPC分类号： G01V3/00 ,  G01R33/20

    CPC分类号： G01R33/3657 ,  G01R33/035 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/34061 ,  G01R33/34092 ,  G01R33/341 ,  G01R33/3642 ,  G01R33/3671

    摘要： A multimode resonator resonating at two or more frequencies is operated at cryogenic temperatures and composed of a superconducting material or a normal metal with a superconducting section serving as a RF superconducting switch. The multimode resonator is coupled to a NMR spectrometer and a RF switch power source, wherein its one frequency is selected to correspond to the operating frequency of the NMR spectrometer and at least a second frequency is tuned to a frequency of RF switch power source, unrelated to the spectrometer frequency, therefore power at this frequency does not perturb the operation of the spectrometer. When activated, the RF switch power source induces a current sufficient to approach or exceeds the critical current in one or more sections of the superconducting material of the multimode resonator, thereby increasing its resistance and reducing the Q factor of the multimode resonator.

    SUPERCONDUCTING MAGNETISM MEASURING DEVICE, BIOMAGNETISM MEASURING METHOD, BIOMAGNETISM MEASURING DEVICE-USE SENSOR TUBE COVER AND SHEET
    8.
    发明公开
    SUPERCONDUCTING MAGNETISM MEASURING DEVICE, BIOMAGNETISM MEASURING METHOD, BIOMAGNETISM MEASURING DEVICE-USE SENSOR TUBE COVER AND SHEET 审中-公开
    生物燃料电池，生物燃料电池，生物燃料电池，电力，电力，电力，电力，电力

    公开(公告)号：EP1987769A1

    公开(公告)日：2008-11-05

    申请号：EP07713485.6

    申请日：2007-02-20

    申请人： University Corporation, Kanazawa Inst. of Techn ,  National University Corporation Tokyo Medical and Dental University

    发明人： ADACHI, Yoshiaki, c/o University Corporation ,  KAWABATA, Shigenori, c/o Nat. University Corporation ,  TOMIZAWA, Shoji, c/o National University Corp.

    IPC分类号： A61B5/05 ,  G01N27/72 ,  G01R33/035

    CPC分类号： G01R33/035 ,  A61B5/04005 ,  A61B5/6822 ,  G01N27/72

    摘要： A superconducting magnetism measuring apparatus is provided which is capable of favorably measuring a faint degree of magnetism generated in the cervical or waist part of a subject to be measured with no need of the neck or waist of the subject being bent forward. Its sensor cylinder (10) is arranged of a four-sided cylindrical shape having a width along the y direction of not smaller than 5 cm and not greater than 20 cm and a width along the x direction of not smaller than 5 cm and not greater than 20 cm. One side at the distal end (10c) of the sensor cylinder (10) is moderately curved to project at the center not smaller than 0.5 cm and not greater than 4 cm from both the upper and lower ends along the y direction. This allows the side at the distal end of the sensor cylinder (10) to come into direct contact with the cervical or waist part of the subject when the neck or waist remains not belt forward, whereby a faint magnetism generated in the spinal cords or nerves of the subject can favorably be measured.

    摘要翻译： 提供一种超导磁测量装置，其能够有利地测量被测物体的颈部或腰部产生的微弱程度的磁性，而不需要使被检体的颈部或腰部向前弯曲。 其传感器圆筒（10）布置成四边形的圆柱形，其沿着y方向的宽度不小于5cm且不大于20cm，并且沿x方向的宽度不小于5cm，而不是更大 超过20厘米。 在传感器圆筒（10）的远端（10c）处的一侧适度地弯曲，以沿着y方向从上端和下端突出不小于0.5cm且不大于4cm的中心。 这样当颈部或腰部保持不向前方时，传感器圆筒（10）的远端侧面与被检体的颈部或腰部部分直接接触，从而在脊髓或神经中产生微弱的磁力 可以有效地测量。

    Compact superconducting magnetometer
    10.
    发明公开
    Compact superconducting magnetometer 失效
    Kompaktes supraleitendes磁力计。

    公开(公告)号：EP0554880A2

    公开(公告)日：1993-08-11

    申请号：EP93101776.8

    申请日：1993-02-05

    申请人： BIOMAGNETIC TECHNOLOGIES, INC.

    发明人： Hirschkoff, Eugene C. ,  DiIorio, Mark S. ,  Johnson, Richard T. ,  Buchanan, D. Scott

    IPC分类号： G01R33/035

    CPC分类号： G01R33/035 ,  A61B5/04008

    摘要： A magnetometer (20) comprises a magnetic field pickup coil (22) and a magnetic field detector (26) that receives electrical signals from the pickup coil (22) and produces an electrical detector output (28) responsive thereto. The pickup coil (22) and detector (26), which are preferably made of high temperature superconductors, are enclosed in an insulated enclosure (32) having no vacuum insulation structure. Preferably, the enclosure is made of a foamed polymer material such as styrofoam. A coolant is provided to the interior of the enclosure, to cool the pickup coil and detector to a temperature below their superconducting transition temperature. A number of such modular magnetometers may be connected together to form an array.

    摘要翻译： 磁力计（20）包括磁场拾取线圈（22）和磁场检测器（26），磁场检测器接收来自拾取线圈（22）的电信号，并响应于此产生电检测器输出（28）。 优选由高温超导体制成的拾取线圈（22）和检测器（26）被封闭在没有真空绝缘结构的绝缘外壳（32）中。 优选地，外壳由发泡聚合物材料如聚苯乙烯泡沫塑料制成。 冷却剂被提供到外壳的内部，以将拾取线圈和检测器冷却到低于其超导转变温度的温度。 许多这样的模块化磁力计可以连接在一起以形成阵列。