公开(公告)号：US10655783B2

公开(公告)日：2020-05-19

申请号：US15680313

申请日：2017-08-18

申请人： Bruker BioSpin AG

发明人： Patrick Wikus ,  Joerg Hinderer

IPC分类号： F17C3/08 ,  F25B9/14 ,  H01F6/04 ,  F25D19/00 ,  G01R33/38 ,  G01R33/3815

摘要： A cryostat arrangement includes a superconducting magnet to be cooled by an active cryocooler. The cryocooler includes a coolant circuit with a compressor, a cold head, and a cold finger in thermal contact with the magnet. A volumetric vessel containing cryogenic fluid is thermally coupled to the magnet. The volumetric vessel is connected to the coolant circuit by a pressure-resistant line. A fluidic component influences the flow rate through the line in a defined manner such that the cryogenic fluid flows between the volumetric vessel and the coolant circuit with a time constant of at least 15 minutes. The cryostat can be operated in a “cryogen-free” manner and permits a sufficiently long time to quench in the event of operational malfunctions.

公开(公告)号：US10261143B2

公开(公告)日：2019-04-16

申请号：US15355290

申请日：2016-11-18

申请人： Bruker BioSpin AG

发明人： Nicolas Freytag ,  Fabian Kuehler

IPC分类号： G01R33/30 ,  G01R33/46

摘要： A probehead of an NMR-MAS apparatus includes a sample which has a rotation axis tilted by an angle θ>0 with respect to the z-axis. The angle θ can be adjusted about a target angle θtarget by tilting around a tilt axis. The rotation axis has a fixed angle with respect to the probehead, and the NMR-MAS apparatus tilts at least part of the probehead to adjust the angle θ. The probehead has an outer contour K between an upper end and a lower end. For all z between the upper end and the lower end, a cross-section S(z) of the contour K exists parallel to the xy-plane with a width Q(z) in the x-direction. The width Q(z) is smaller at points away from z=0, such that Q(z1) 0.

公开(公告)号：US10228471B2

公开(公告)日：2019-03-12

申请号：US15586908

申请日：2017-05-04

申请人： General Equipment for Medical Imaging S.A. ,  West Virginia University ,  Consejo Superior de Investigaciones Cientificas (CSIC) ,  Universitat Politecnica de Valencia ,  BRUKER BIOSPIN AG

发明人： Jose Maria Benlloch Baviera ,  Antonio Javier Gonzalez Martinez ,  Stan Majewski

IPC分类号： G01T1/20 ,  G01T1/29 ,  G01T1/164

摘要： This disclosure describes an imaging radiation detection module with novel configuration of the scintillator sensor allowing for simultaneous optimization of the two key parameters: detection efficiency and spatial resolution, that typically cannot be achieved. The disclosed device is also improving response uniformity across the whole detector module, and especially in the edge regions. This is achieved by constructing the scintillation modules as hybrid structures with continuous (also referred to as monolithic) scintillator plate(s) and pixelated scintillator array(s) that are optically coupled to each other and to the photodetector. There are two basic embodiments of the novel hybrid structure: (1) the monolithic scintillator plate is at the entrance for the incoming radiation, preferably gamma rays, and the pixelated array placed behind the plate, all in optical contact with the photodetector, (2) the order of the scintillator components is reversed with the pixelated scintillation plate placed in front of the monolithic plate.

公开(公告)号：US20180120389A1

公开(公告)日：2018-05-03

申请号：US15794766

申请日：2017-10-26

申请人： Bruker BioSpin AG

发明人： Nicolas FREYTAG

IPC分类号： G01R33/34 ,  G01R33/36 ,  G01R33/341

CPC分类号： G01R33/34092 ,  G01R33/34023 ,  G01R33/34046 ,  G01R33/34061 ,  G01R33/341 ,  G01R33/3628 ,  G01R33/3635

摘要： An HF resonator assembly generates at least two independent alternating magnetic fields in a test volume of a magnetic resonance apparatus. The HF resonator assembly includes a first pair of flat coils that form a first HF resonator and comprise electrical conductor portions that surround a planar surface portion. The flat coils are arranged on opposing sides of the test volume, on coil support plates that are mutually parallel and in parallel with the longitudinal axis. A second pair of flat coils forms a second HF resonator on second coil support plates. The projections of the planar surface portions of the flat coils in each of the first pair of flat coils and the second pair of flat coils overlap in part, but not completely, when viewed in a direction perpendicular to the respective planar surface portions.

公开(公告)号：US09921278B2

公开(公告)日：2018-03-20

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

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.

公开(公告)号：US20170328968A1

公开(公告)日：2017-11-16

申请号：US15592889

申请日：2017-05-11

申请人： Bruker BioSpin AG

发明人： Patrick WIKUS ,  Joerg HINDERER

IPC分类号： G01R33/38 ,  G01R33/3815

摘要： A cryostat system is kept at a cryogenic operating temperature without providing or supplying cryogenic fluids by a cryocooler. The cryostat system includes a superconducting magnet arrangement and a heat sink apparatus to prolong the time before the superconducting magnet arrangement quenches/returns to the normally conducting state if active cooling fails. The heat sink apparatus includes magnetocaloric material and is thermally connected to the superconducting magnet arrangement and/or to parts of the cryostat system through which ambient heat can flow to the superconducting magnet arrangement. In this way, the cryostat system can be operated in a truly “cryogen-free” manner while maintaining a sufficiently long time to quench in the event of potential operational malfunctions.

公开(公告)号：US09810566B2

公开(公告)日：2017-11-07

申请号：US14836963

申请日：2015-08-27

申请人： Bruker BioSpin AG

发明人： Dmitry Eshchenko ,  Robert Schauwecker

IPC分类号： G01F23/24

CPC分类号： G01F23/247 ,  G01F23/248

摘要： A method for indicating the level of a liquefied gas in a cryogenic tank having a resistance temperature detector (1). The controller applies a heating pulse to the detector and performs a single resistance measurement after the heating pulse. The overheating of the sensor and the time interval for the measurement are found in a separate set of test experiment. As a result, for temperature sensors with negative temperature coefficient, the resistance of the sensor in gas is below some unique characteristic value, which can be used like a threshold criterion to distinguish between the liquid and the gas in a wide temperature range. For sensors with positive temperature coefficient, the resistance of the sensor in gas is larger than some unique characteristic value, which can be used like a threshold criterion to distinguish between the liquid and the gas in a wide temperature range.

公开(公告)号：US09715958B2

公开(公告)日：2017-07-25

申请号：US14799582

申请日：2015-07-15

申请人： Bruker BioSpin AG

发明人： Robert Schauwecker ,  Patrik Vonlanthen

IPC分类号： H01F1/00 ,  H01F6/00 ,  H01F6/04 ,  G01R33/3815 ,  H01F6/02

CPC分类号： H01F6/006 ,  G01R33/3815 ,  H01F6/02 ,  H01F6/04

摘要： A method for charging a magnet arrangement having a superconducting tape conductor with a first transition temperature in a cryostat device. The magnet arrangement is temperature-controlled to a first pre-operating temperature between the first transition temperature and the operating temperature, a first pre-operating current is excited, the magnet arrangement is cooled to operating temperature and a first operating current is excited. The magnet arrangement has a second magnet winding composed of a second superconductor material with a second transition temperature above the operating temperature and at least 15 K below the first transition temperature, wherein a second operating current in the second magnet winding is excited at the latest after cooling of the magnet arrangement to the operating temperature, and with the second operating current the second magnet winding generates a second operating magnetic field in the volume of the first magnet winding.

公开(公告)号：US20150084632A1

公开(公告)日：2015-03-26

申请号：US14489502

申请日：2014-09-18

申请人： BRUKER BIOSPIN AG

发明人： Dirk Wilhelm ,  Joost A.B. Lohman ,  Joerg Hinderer ,  Hannes Grubinger

IPC分类号： G01R33/56 ,  G01R33/28

CPC分类号： G01R33/5605 ,  G01R33/28 ,  G01R33/282

摘要： A DNP apparatus includes a cryostat (7) having an opening (8) and a loading path for a sample (1), the loading path extending from the opening to a sample receptacle (29), with a cryomagnet and a microwave source (2) as well as a configuration for supplying microwave radiation from the microwave source to the sample, which comprises a microwave path extending directly to the sample. The microwave path extends spatially separately from the loading path and the configuration for supplying microwave radiation has at least one microwave feed-through passing through one or more walls of the cryostat. The microwave path is incident on the sample from a direction opposite to the loading path or from a sideward direction at right angles to or at an inclination with respect to the axis of the loading path. This leads to simple and efficient polarization of the electron spins in the sample.

摘要翻译： DNP装置包括具有开口（8）和用于样品（1）的加载路径的低温恒温器（7），所述加载路径从开口延伸到样品容器（29），用低温磁体和微波源（2 ）以及用于将微波辐射从微波源提供给样品的配置，其包括直接延伸到样品的微波路径。 微波路径在空间上与加载路径分开延伸，并且用于提供微波辐射的配置具有穿过低温恒温器的一个或多个壁的至少一个微波馈通。 微波路径从与加载路径相反的方向或从侧向方向以相对于装载路径的轴线成直角或相对倾斜入射在样品上。 这导致样品中电子自旋的简单而有效的极化。

公开(公告)号：US20140125342A1

公开(公告)日：2014-05-08

申请号：US14052707

申请日：2013-10-12

申请人： BRUKER BIOSPIN AG

发明人： Pierre-Alain Bovier ,  Guenter Kuebler

IPC分类号： G01R33/3815 ,  G01R33/38

CPC分类号： G01R33/3815 ,  G01R33/3802 ,  G01R33/3873 ,  Y10T29/49014

摘要： A magnet assembly has a field shaping device (P1) that is cylindrically symmetric with respect to the z-axis and made of magnetic material. At least parts of the field shaping device have a radial distance from the z-axis of less than 80 millimeters and compensate for at least one of the inhomogeneous field parts An0·zn of the magnet coil system. The field shaping device has one or more non cylindrically symmetric recesses, which are constituted such that at least a coefficient Anm or Bnm in the magnetic field expansion of the magnet assembly according to the spherical harmonic functions is reduced by at least 50%. In this way, the field homogeneity of the working volume can be substantially increased in a simple manner and without increasing the volume of the magnet assembly, wherein only a few iterations are required to optimize the magnet assembly.

摘要翻译： 磁体组件具有相对于z轴圆柱对称并由磁性材料制成的场成形装置（P1）。 场成形装置的至少一部分具有小于80毫米的z轴的径向距离，并补偿至少一个磁体线圈系统的非均匀磁场部分An0·zn。 场整形装置具有一个或多个非圆柱对称的凹部，其构造成使得根据球谐函数的磁体组件的磁场扩展中的至少系数Anm或Bnm减小至少50％。 以这种方式，可以以简单的方式显着增加工作容积的场均匀性，而不增加磁体组件的体积，其中仅需要几次迭代来优化磁体组件。