Probe for gyromagnetic resonance spectroscopy专利检索-回旋管电子零件及设备专利检索查询-专利查询网

Probe for gyromagnetic resonance spectroscopy

阅读：58发布：2022-11-01

专利汇可以提供Probe for gyromagnetic resonance spectroscopy专利检索，专利查询，专利分析的服务。并且A sample probe for gyromagnetic (particularly nuclear magnetic) resonance spectroscopy in which the sample may be brought to a desired controlled temperature includes: inner sleeve members defining a forward path for a temperature controlled working gas, which successively passes through a cooler, over the coil of a servo-controlled heater and then to the sample station; apertures in the downstream end of the inner sleeve members causing the gas to reverse its flow back between the inner sleeve members and outer tubular means, the return gas substantially passing around the sample station and heating means, and in direct heatexchanging relationship to the cooler. This return path of the gas tends to minimize temperature gradients in the vicinity of the sample, while the heat exchange at the cooler tends to minimize the cooling of the incoming gas at high controlled (heater) temperatures; thus the heat within the system is conserved, all described parts being surrounded by an insulating Dewar tube.，下面是Probe for gyromagnetic resonance spectroscopy专利的具体信息内容。

权利要求

1. A variable temperature probe for gyromagnetic resonance spectroscopy, comprising: a Joule-Thomson minicooler device in which there are provided a passage forming part of a forward path of a temperaturecontrolling working gas, a heat exchanger means about said passage forming part of a return path of said working gas and a nozzle at the downstream end of said passage; heating means downstream of and spaced from said nozzle; a cylindrical member downstream of said heating means for defining the longitudinal boundary of a temperature-controlled sample station whereat a sample may be accommodated within a sample-holder tube; means defining said forward path for the working gas as it diffuses through the nozzle, impinges on the heating means and reaches said sample station; means towards the downstream end of said sample station for reversing the flow of the working gas into said return path; and means for defining said return path around the forward path.

2. The probe of claim 1, in which said heating means comprises: an electrical heating device, an electrical temperature sensor in contact with said heating device, and connecting means for connecting said heating device and said sensor to an electrical control circuit external to the probe.

3. The probe of claim 2, wherein: said heating device comprises a coil of wire wound on the outside of a bobbin of good thermal conductivity; and said temperature sensor is sealed into, and in good contact with, an axial bore in said bobbin.

4. The probe of claim 1, wherein the portion of the forward path extending between said nozzle and said heating means is defined by a material having a low thermal conductivity.

5. The probe of claim 1, wherein the portion of the forward path extending around said heating means is defined by a material having high thermal conductivity.

6. The probe of claim 1, wherein said cylindrical member leads to a series of apertures through which the working gas reverses its flow as it enters the return path.

7. The probe of claim 6, including a lateral bearing for providing side location for a spinning cylindrical sample-holder, the spacing between said series of apertures and said lateral bearing being such that said lateral bearing is comparatively unaffected by the temperature set up at the sample station.

8. The probe of claim 1, wherein said minicooler device is surrounded by a thermally insulating sleeve having discrete apertures through which the returning working gas enters before passing through substantially the whole of said heat exchanger means.

9. The probe of claim 1, including a cylindrical Dewar surrounding said minicooler device, said heating means and said cylindrical member and extending to a region beyond the means for reversing the flow of the working gas, the inner face of the Dewar representing the outer boundary of the return path.

10. The probe of claim 1, including a plug downstream of said heating means provided with longitudinal circumferential grooves which form part of the forward path, said plug defining the bottom boundary of said temperature-controlled sample station and accommodating an end bearing for end-wise support of a spinning sample-holder tube.

11. The probe of claim 1, wherein said minicooler device and said heating means are formed into a self-supporting unit for easy insertion into the probe.

12. The probe of claim 1, wherein said cylindrical member supports a receiving coil for picking up a gyromagnetic resonance signal.

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