-
1.发明授权公开(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
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：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：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
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：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.
-
公开(公告)号：US09739862B2
公开(公告)日：2017-08-22
申请号：US14489502
申请日：2014-09-18
申请人： BRUKER BIOSPIN AG
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.
-
6.发明授权公开(公告)号：US09494344B2
公开(公告)日：2016-11-15
申请号：US14320670
申请日：2014-07-01
申请人： BRUKER BIOSPIN AG
CPC分类号： F25B9/002 , F17C2221/014 , F17C2221/017 , F17C2270/0536 , F25B9/00 , F25D17/00 , F25D19/00 , G01R33/3804 , G01R33/3815 , H01F6/04
摘要： A method for converting a cryostat configuration (1) having a first container (2) with a liquid helium bath (3) and a second container (6) which is filled with liquid nitrogen (7) is characterized in that a cooling medium (12) which is in a gaseous state at a temperature of 60K and a pressure of 1 bar, is introduced into the second container and is cooled by a refrigerator (16) by means of a cooling circuit (11), the coolant lines of which are guided into the second container, to an operating temperature of ≦60K. With this retrofit for existing cryostat configurations that utilize both liquid helium and also liquid nitrogen for cooling a superconducting coil, use of liquid nitrogen can be completely avoided and the evaporation rate of the liquid helium can also be considerably reduced without having to re-liquefy the cryogens used.
摘要翻译： 用液态氦浴（3）和第二容器（6）将具有第一容器（2）的低温恒温器配置（1）转换成液氮（7）的方法的特征在于，冷却介质 ）在60K的温度和1巴的压力下被引入到第二容器中，并且通过冷却回路（11）由冷藏库（16）冷却，其冷却液管线是 导入第二容器，工作温度≤60K。 通过对现有的低温恒温器配置的改进，利用液氦和液氮来冷却超导线圈，可以完全避免使用液氮，并且液氦的蒸发速率也可以大大降低，而不必重新液化 使用了冷冻剂。
-
公开(公告)号：US09958520B2
公开(公告)日：2018-05-01
申请号：US15673063
申请日：2017-08-09
申请人： Bruker BioSpin AG
发明人： Robert Schauwecker , Joerg Hinderer
IPC分类号： G01R33/38 , G01R33/34 , G01R33/3815
CPC分类号： G01R33/3804 , G01R33/30 , G01R33/31 , G01R33/34015 , G01R33/34023 , G01R33/3403 , G01R33/3815 , H01F6/04
摘要： An NMR apparatus includes a superconducting magnet assembly, a cryostat having a vacuum vessel, a refrigeration stage that can be operated at a temperature of
-
8.发明申请公开(公告)号：US20150007586A1
公开(公告)日：2015-01-08
申请号：US14320670
申请日：2014-07-01
申请人： BRUKER BIOSPIN AG
IPC分类号： F25B9/00
CPC分类号： F25B9/002 , F17C2221/014 , F17C2221/017 , F17C2270/0536 , F25B9/00 , F25D17/00 , F25D19/00 , G01R33/3804 , G01R33/3815 , H01F6/04
摘要： A method for converting a cryostat configuration (1) having a first container (2) with a liquid helium bath (3) and a second container (6) which is filled with liquid nitrogen (7) is characterized in that a cooling medium (12) which is in a gaseous state at a temperature of 60K and a pressure of 1 bar, is introduced into the second container and is cooled by a refrigerator (16) by means of a cooling circuit (11), the coolant lines of which are guided into the second container, to an operating temperature of ≦60K. With this retrofit for existing cryostat configurations that utilize both liquid helium and also liquid nitrogen for cooling a superconducting coil, use of liquid nitrogen can be completely avoided and the evaporation rate of the liquid helium can also be considerably reduced without having to re-liquefy the cryogens used.
摘要翻译： 用液态氦浴（3）和第二容器（6）将具有第一容器（2）的低温恒温器配置（1）转换成液氮（7）的方法的特征在于，冷却介质 ）在60K的温度和1巴的压力下被引入到第二容器中，并且通过冷却回路（11）由冷藏库（16）冷却，其冷却液管线是 引导到第二个容器，工作温度为＆lt; lE; 60K。 通过对现有的低温恒温器配置的改进，利用液氦和液氮来冷却超导线圈，可以完全避免使用液氮，并且液氦的蒸发速率也可以大大降低，而不必重新液化 使用了冷冻剂。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.012 秒)