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公开(公告)号：US07436182B1
公开(公告)日：2008-10-14
申请号：US11903350
申请日：2007-09-21
申请人： Alexander M. J. Hudson , Sean Burns , Knut Mehr
发明人： Alexander M. J. Hudson , Sean Burns , Knut Mehr
IPC分类号： G01V3/00
CPC分类号： G01R33/3628 , G01R33/34015 , G01R33/3403 , G01R33/34092
摘要： According to some embodiments, low-temperature (cryogenic) nuclear magnetic resonance (NMR) probe fixed capacitors include thermally-conductive dielectric layers serving to thermally connect the capacitors to a cryogenic heat sink. For example, a sapphire layer may be metalized on opposite sides to form copper capacitor plates, and along an edge to form a copper heat sink contact. Heat generated by RF currents during an operation of an NMR circuit including such a capacitor is discharged through the thermally-conductive dielectric to the heat sink. Cooling cold-probe circuit components such as capacitors through thermally-conductive capacitor dielectrics allows reducing perturbations introduced into the circuit by components such as heat sinks.
摘要翻译： 根据一些实施例，低温（低温）核磁共振（NMR）探针固定电容器包括用于将电容器热连接到低温散热器的导热电介质层。 例如，蓝宝石层可以在相对侧进行金属化以形成铜电容器板，并沿着边缘形成铜散热器接触。 在包括这种电容器的NMR电路的操作期间由RF电流产生的热量通过导热电介质被排放到散热器。 通过导热电容电介质冷却冷探头电路元件，如电容器，可以减少散热片等部件引入电路的干扰。
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公开(公告)号：US07378847B2
公开(公告)日：2008-05-27
申请号：US11505085
申请日：2006-08-16
IPC分类号： G01V3/00
CPC分类号： G01R33/30 , G01R33/31 , G01R33/3403 , G01R33/34092 , G01R33/422
摘要： The vacuum properties of a cryogenic NMR probe maintained at a desired operating temperature by a cold head heat exchanger are improved by a separate heat exchanger operating below the temperature of the cold head heat exchanger for maintaining cryo-pumping surfaces at a temperature below said selected operating temperature.
摘要翻译： 由冷头热交换器保持在期望的操作温度的低温NMR探头的真空性能通过在冷头热交换器的温度以下操作的单独的热交换器来改进，以将低温泵送表面保持在低于所选择的操作 温度。
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公开(公告)号：US07288939B1
公开(公告)日：2007-10-30
申请号：US11504845
申请日：2006-08-16
IPC分类号： G01V3/00
CPC分类号： G01R33/31 , G01R33/34 , G01R33/34023 , G01R33/3403
摘要： The thermal performance and vacuum properties of a cryogenic NMR probe are improved when thermal control is implemented by conductive heat transfer to a cold head cooled by a heat exchanger to below the selected operating temperature. The heat load is manipulated by locating a heater to produce a more nearly constant heat load in conjunction with pulsed RF power and in one embodiment transferring such heater power through a common thermal path. In another embodiment, the heater power is conductively transferred directly to the heat exchanger.
摘要翻译： 当通过导热传递到由热交换器冷却到低于所选操作温度的冷头进行热控制时，低温NMR探头的热性能和真空特性得到改善。 通过定位加热器以结合脉冲RF功率产生更接近恒定的热负荷来操纵热负荷，并且在一个实施例中通过共同的热路径传递这种加热器功率。 在另一个实施例中，加热器功率被直接传导到热交换器。
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