• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Fluid channeling system (150) for an NMR system (100), characterized in that the pipeline system comprises an exhaust system (160) of the NMR system comprising a first branch (161) and a second fluid circulation branch (162).
    公开号:FR3046678A1
    申请号:FR1650224
    申请日:2016-01-12
    公开日:2017-07-14
    发明作者:Eric Bouleau；Daniel Lee
    申请人:Commissariat a lEnergie Atomique CEA；Commissariat a lEnergie Atomique et aux Energies Alternatives CEA；
    IPC主号:
    专利说明:

    Fluid channeling system of an NMR system and method of operating such a system. The invention relates to a fluid channeling system of an NMR system. The invention also relates to an NMR system comprising such a pipe system. The invention further relates to a method of operating such systems.
    An NMR device (or device for detecting or analyzing Nuclear Magnetic Resonance) comprises a sample holder rotated in a static magnetic field and exposed to a second magnetic field perpendicular to the first and created by a radiofrequency coil which receives back a signal which is analyzed to derive information on a solid sample disposed in the sample holder. According to an embodiment of the state of the art, several gaseous streams coming from the same source, a standard container such as a helium bottle mounted under pressure, are directed towards the probe of the device which comprises the sample holder. A first flow has the function of rotating the sample holder, by acting on the blades or vanes of a drive turbine of a rotor which comprises the sample holder. A second flow has the function of bringing the sample to a certain temperature. A third flow creates an aerostatic bearing of lift of the rotor in the stator. Optionally, a fourth flow makes it possible to cool a heat shield protecting the device from thermal radiation.
    The flows are insured and channeled by a pipeline system. The pipeline system and the NMR device form an NMR system.
    The search for the best performance of solid state sample analysis by NMR uses a rotation of the sample along a particular axis called "magic angle". It is important to achieve a high speed of rotation. On the other hand, the increase in the intensity of magnetic fields, which currently reaches about 20 Tesla, has improved the sensitivity of NMR detection. However, it is very difficult today to increase this intensity.
    Existing solutions remain imperfect and insufficient and there is therefore a general need for improved detection and NMR analysis of a solid sample.
    In recent years, research and industrial laboratories have been working on the development of prototypes to achieve several tens of kilohertz of sample rotation frequency in the 10K-100K temperature range.
    More specifically, the sample to be studied or qualified by this technique is placed in a tube which has the function of rotor. This tube equipped with a cap at one end if the other is blind or two caps form the sample holder or rotor and is installed in a stator. The plugs are machined so that they form turbines (thus one or two turbines) per rotor. The turbines are fed by the gas flows distributed by the stator. The rotor is thus rotated. The rotor-stator assembly constituting a rotating machine is provided with gaseous bearings whose configuration may be of the aerodynamic, aerostatic or hybrid type. The bearings are also fed by the gas flows via the stator. Another gas flow makes it possible to bring the sample to the desired temperature to carry out the study. Such a system is small because the diameter of the sample carrier rotor may for example be between 0.7 mm and 7 mm. This implies a high compactness of the stator-rotor assembly.
    The different gas flows can be distributed radially or tangentially on the rotor. They can be evacuated axially, from the center to the outside of the stator. The gas flows supplying the turbine or turbines are removed most easily since the turbine or turbines are located at the ends of the rotor. The gas flows supplying the bearings arrive on the rotor near the turbines. The gaseous flow cooling the sample arrives on the rotor in its central zone.
    This fluidic arrangement is such that the stream cooling the sample sweeps, when it is axially evacuated, the zones of the bearings, then the zones of the turbines. The flows supplying the bearings sweep, when they are axially evacuated, the zones of the turbines. The flows feeding the bearings create fluid corners in the bearing areas. This results in a relative tightness such that the flows feeding the turbines located at the ends of the rotor can not escape to the central zone of the rotor. Thus, the flows feeding the turbines can not influence the temperature of the central zone of the rotor where the sample is located. The flows feeding the bearings are directed and discharged in the axis of the rotor towards its ends pushed by the flow cooling the central zone of the rotor and the sample.
    The materials used to manufacture the tube and the turbines (ceramics and plastics) are bad thermal conductors. It follows that the thermal flow (by solid conduction) of the ends of the rotor to the central zone of the rotor is negligible. A contact zone at the tube and turbine interfaces further creates a thermal contact resistance which further limits the heat flux.
    As a result, the temperatures of the flows feeding the bearings and the turbines can be higher than that of the flow cooling the sample.
    To operate at very low temperatures, it is necessary to supply cold gases.
    In the temperature range 90K to 300K, nitrogen appears as the fluid to use obviously since it is non-hazardous, inexpensive and easy to use. At a lower temperature and up to about 10K, helium is the element to use because of its thermo-physical characteristics. Above 90K, apart from the thermal aspects, this is also the case since helium makes it possible to obtain rotation frequencies twice as high as those generated with nitrogen. However, although essential for making NMR between 10K and 90K, helium generates rapidly prohibitive operating costs. Thus, very few laboratories in the world can perform NMR analyzes, even experimentally, below 100K.
    Two solutions are currently being applied to overcome this difficulty.
    As theoretically it is only necessary to cool the sample, neglecting heat losses, only the cooling flow of the sample requires refrigerated fluid. For example, a prototype developed several years ago uses nitrogen as a fluid to supply bearings and turbines and helium as a cooling fluid for the sample. This technique requires an elongated rotor to reduce the thermal influence of nitrogen at 90K, used at the ends of the rotor (in the areas of the bearings and turbines, on the central area). This central zone is fed by a helium flux between 10K and 90K. Although clever, this solution is technologically complex to implement and is not sustainable for obtaining long-lived NMR spectra.
    Another solution is to recover the exhaust gas from the stator and to recirculate it in the device by a pressurized closed loop. In this loop, the gas is lowered to the desired operating temperature by a cryogenic source via one or more heat exchangers. The whole works in a Brayton cycle. Given the compactness of this miniature pneumatic system but especially the closed loop operation, the only solution seems to lie in the use of flows that are all at the same temperature. The gas recovered at the exhaust of the stator common to the different flows is injected into a countercurrent heat exchanger in order to exchange heat with the different flows supplying the stator-rotor assembly to pre-cool these flows. If the flow temperatures feeding the bearings and / or turbines were higher than the temperature of the flow cooling the sample, the temperature of the exhaust gas would be too high and unbalance the thermal cycle that would no longer be viable.
    Operation with identical flow temperatures is not very problematic up to 50K. Below, the operation becomes more complex for different reasons.
    Below 30K, the thermophysical characteristics of helium vary very strongly and non-linearly and the control of the rotation becomes delicate and sensitive to ensure a constant rotation frequency.
    At the level of the bearings, the strong variation of the density of the helium causes a significant contraction of the gaseous volume of the bearing. Thus, the flow rate must be adjusted accordingly and quickly to ensure a suitable and constant stiffness of the bearing to preserve a rotation without disturbing eccentricity frequency or destructive rotor.
    At the turbine level, the mechanical power received on the blades is a function of the ratio of the high cube mass flow rate value to the squared gas density value. The gas used to change from a rotation at room temperature, that is 300K, to a rotation at 10K is necessarily helium. Now the density of helium is substantially multiplied by 30 between 300K and 10K. The mass flow must therefore be multiplied by 10 over the same temperature range to obtain a constant power.
    Thus, the flow rate to be applied to maintain the rotation at a temperature T between 300K and 8K relative to the initial flow rate established at ambient temperature, is almost exponential and depends on the following law: m ° = 50.5xT0'68 with m ° the mass flow rate and T the flow temperature.
    Between 300K and 50K, the flow rate is increased by a factor of 3 to maintain a constant rotation frequency whereas, from 50K to 25K, this factor is almost 2. Overall, for a constant operation at 30kHZ up to 10K the flow rate The mass should theoretically be multiplied by 10. For example, a 2 mm diameter NMR probe rotor will require a flow rate of between 0.1 and 0.2 g.sup.-1 to rotate at 30 kHz at room temperature. This flow must be 1 to 2 g.s'1 to operate at 10K.
    Consequently, the recirculation device and the cryogenic source (consisting of an exchanger and a cryocooler) must be very adaptable but above all oversized at high temperature to treat these very large variations in flow rates and ensure correct operation at very low temperatures. .
    A final problem is due to the coupling between the tube and the turbines. For reasons of mechanical reliability but also economic, the tube and the turbines are made of different materials. The tube that must offer the lowest possible magnetic susceptibility is for example zirconia (zirconium dioxide), material obtained by sintering and sensitive to shocks, for which reason the turbines in which the fins are made, are made for example of a polymer based on polyimide such as Vespel® (registered trademark of DuPont). These two materials offer good characteristics for working in the cryogenic field but have differential contractions even more distant than the temperature is low. The turbine mounted tight at room temperature in the tube is less and less when the temperature decreases. The loss of a turbine can then occur randomly depending on sudden changes in flow rates as explained above.
    It therefore appears that, for dynamic and mechanical reasons, it is desirable to use flows supplying the bearings and the turbines at temperatures lower than that of the flow cooling the sample. However, by adopting this solution, the known devices of the prior art can not function properly.
    The object of the invention is to overcome the disadvantages mentioned above and to improve the NMR systems known from the prior art. In particular, the invention provides a simple piping system and that allows for efficient management of the refrigerant.
    According to the invention, the fluid channeling system for the NMR system comprises an exhaust circuit of the NMR system comprising a first branch and a second branch of fluid circulation.
    The first branch may not include a cryocooler line and / or the second branch may include a line of a first cryocooler.
    The first branch may comprise a pipe of a first exchanger and / or the second branch may comprise a pipe of a second heat exchanger and a pipe of a third heat exchanger.
    The system may include an NMR system supply circuit comprising a third fluid flow branch and a fourth fluid flow branch.
    The third branch of fluid circulation can comprise several sub-branches, in particular a first sub-branch of circulation of a first stream whose function is to rotate a sample holder by acting on blades or vanes of a turbine for driving a rotor of the NMR device, the rotor comprising the sample holder, and / or a second flow sub-branch of a second flow whose function is to create a lift bearing of the rotor in a stator of the rotor. NMR device and / or a third flow sub-branch of a third stream whose function is to cool a heat shield protecting the NMR device from thermal radiation.
    The third branch may include at least one conduit of a second cryocooler and / or the fourth branch may include a conduit of a third cryocooler and a conduit of a fourth cryocooler.
    The second cryocooler and the third cryocooler can be the same cryocooler, including the same floor of a cryocooler.
    The first cryocooler and the fourth cryocooler can be the same cryocooler, including the same floor of a cryocooler.
    The system may comprise a single cryorefrigerator, in particular a cryocooler comprising a first stage and a second stage.
    The third branch may comprise at least one pipe of the first heat exchanger and / or the fourth branch may comprise a pipe of the third heat exchanger and a pipe of the second heat exchanger.
    The second branch may include a flow regulator.
    The third branch may comprise at least one flow regulator and / or the fourth branch may comprise a flow regulator.
    An NMR system according to the invention comprises a pipe system as defined above and an NMR device, in particular an NMR analysis device.
    A method of operation of a system as defined above, is characterized in that the flow rates are regulated so that the fluid flow rates in the first and third branches are equal or substantially equal and / or in that one regulates the fluid flow rates so that the flows in the second and fourth branches are equal or substantially equal.
    The objects, features and advantages of the present invention are set forth in detail in the following description of two particular embodiments with reference to the accompanying drawing. These embodiments are non-limiting. The attached drawing is composed as follows:
    FIG. 1 schematically represents a first embodiment of an NMR system according to the invention.
    FIG. 2 diagrammatically represents a second embodiment of an NMR system according to the invention.
    A first embodiment of an NMR system 100 according to the invention is described below with reference to FIG.
    The NMR system 100 mainly comprises a compressor 110, an NMR device 120, an insulated enclosure 130 and a first embodiment of a pipe system 150.
    Preferably, the insulated enclosure 130 comprises a heat shield 140. The enclosure preferably encloses the NMR device 120 and a portion of the piping system 150.
    The pipe system mainly comprises an exhaust circuit 160 for driving a refrigerant fluid from the NMR device 120 to the compressor 110 and a supply circuit 180 for driving the refrigerant fluid from the compressor to the NMR device.
    The exhaust circuit comprises a first exhaust branch 161 and a second exhaust branch 162. Preferably, the exhaust circuit splits into the first and second exhaust branches just after the NMR device. More preferably, the two exhaust branches meet just before the compressor. Thus, the first and second branches are preferably parallel branches.
    The first exhaust branch mainly comprises a line 1612 of a first exchanger E11. The first exhaust branch obviously also includes lines 1611 and 1613 completing the line 1612 so as to guide a portion of the refrigerant escaping from the NMR device to the compressor 110. Thus, a first portion of the refrigerant escaping from the NMR device returns to the compressor through the first exchanger E11.
    The second exhaust branch mainly comprises a line 1622 of a first cryocooler C11, a line 1624 of a second exchanger E12 and a line 1626 of a third exchanger E13. The second exhaust branch obviously also includes lines 1621, 1623, 1625, 1627 completing the lines 1622, 1624, 1626 so as to guide a portion of the refrigerant escaping from the NMR device to the compressor 110. Thus, a second part of the refrigerant escaping from the NMR device returns to the compressor through the first cryocooler C11, the second exchanger E12 and the third exchanger E13. Advantageously, it passes through these elements in this order.
    The supply circuit includes a third supply branch 181 and a fourth supply branch 182. Preferably, the supply circuit splits into the third and fourth supply branches just after the compressor. More preferably, the two feed branches remain separated into the NMR device. Thus, the third and fourth branches are preferably parallel branches.
    The third supply branch mainly comprises one or more lines 1812 in the first exchanger E11 and one or more lines 1814 in a second cryocooler C12. The third supply branch obviously also includes lines completing the lines 1812 and 1814 so as to guide a portion of the compressor refrigerant to the NMR device. Thus, a first portion of the refrigerant flows from the compressor to the NMR device through the first exchanger E11 and the second cryocooler C12. Preferably, the fluid passes through the different elements in this order.
    The fourth supply branch mainly comprises a line 1823 of the third exchanger E13, a line 1825 of a third cryocooler C13, a line 1827 of the second exchanger E12 and a line 1829 of a fourth cryocooler C14. The fourth supply branch also obviously includes lines 1822, 1824, 1826, 1828 and 1830 completing the lines 1823, 1825, 1827 and 1829 so as to guide a portion of the refrigerant of the compressor 110 to the NMR device. Thus, a second portion of the refrigerant flows from the compressor to the NMR device through the third exchanger E13, the third cryocooler C13, the second exchanger E12 and the fourth cryocooler C14. Preferably, the fluid passes through the different elements in this order.
    The first portion of fluid passing through the supply circuit is constituted by: a first stream whose function is to rotate the sample holder, by acting on blades or vanes of a driving turbine of a rotor of the NMR device, the rotor comprising the sample holder; and - a third stream which creates an aerostatic bearing of rotor lift in a stator of the NMR device; and, optionally, a fourth stream makes it possible to cool the heat shield protecting the NMR device from thermal radiation.
    Thus, the third branch of circulation comprises three sub-branches. The first exchanger and the second cryorefrigerator thus have at the third branch as many pipes as sub-branches.
    The second portion of fluid passing through the supply circuit is constituted by a second flow whose function is to bring the sample to a suitable temperature.
    The second branch includes a flow regulator 1628.
    The third branch comprises three flow controllers 1811. They make it possible to regulate and / or regulate the flows flowing in the three sub-branches.
    The fourth branch includes a flow regulator 1821.
    These regulators are preferably of the flowmeter-regulator type, that is to say that they also make it possible to measure flow rates.
    The piping system 150 also includes a control module 105 such as a microcontroller for receiving flow information and calculating accordingly commands that are transmitted to the regulators. These orders determine configurations of the different regulators.
    A second embodiment of an NMR system 200 according to the invention is described below with reference to FIG.
    The NMR system 200 mainly comprises a compressor 210, an NMR device 220, an insulated enclosure 230 and a first embodiment of a piping system 250.
    Preferably, the insulated enclosure 230 comprises a heat shield 240. The enclosure preferably encloses the NMR device 220 and a part of the piping system 250.
    The pipe system 250 mainly comprises an exhaust circuit 260 for driving a refrigerant fluid from the NMR device 220 to the compressor 210 and a supply circuit 280 for driving the refrigerant fluid from the compressor to the NMR device.
    The exhaust circuit comprises a first exhaust branch 261 and a second exhaust branch 262. Preferably, the exhaust circuit splits into the first and second exhaust branches just after the NMR device 220. Preferably again, the two exhaust branches meet just before the compressor 210. Thus, the first and second branches are preferably parallel branches.
    The first exhaust branch mainly comprises a line 2612 of a first exchanger E21. The first exhaust branch obviously also includes lines 2611 and 1613 completing the line 1612 so as to guide a portion of the refrigerant escaping from the NMR device to the compressor 210. Thus, a first portion of the refrigerant escaping from the NMR device returns to the compressor through the first exchanger E21.
    The second exhaust branch mainly comprises a line 2622 of a stage C212 of a cryocooler C21, a line 2624 of a second exchanger E22 and a line 2626 of a third exchanger E23. The second exhaust branch obviously also includes lines 2621,2623, 2625, 2627 completing the lines 2622, 2624, 2626 so as to guide a portion of the refrigerant escaping from the NMR device to the compressor 210. Thus, a second part of the refrigerant escaping from the NMR device returns to the compressor through the C212 stage of the cryocooler C21, the second exchanger E22 and the third exchanger E23. Advantageously, it passes through these elements in this order.
    The supply circuit comprises a third supply branch 281 and a fourth supply branch 282. Preferably, the supply circuit splits into the first and second supply branches just after the compressor 210. the two feed branches remain separated into the NMR device 220. Thus, the third and fourth branches are preferably parallel branches.
    The third supply branch mainly comprises one or more lines 2812 in the first exchanger E21 and one or more lines 1814 in a stage C211 of the cryocooler C21. The third supply branch obviously also includes lines completing lines 2812 and 2814 so as to guide a portion of the compressor refrigerant to the NMR device. Thus, a first portion of the refrigerant flows from the compressor to the NMR device through the first exchanger E21 and the C211 stage of the cryocooler C21. Preferably, the fluid passes through the different elements in this order.
    The fourth supply branch mainly comprises a line 2823 of the third exchanger E23, a line 2825 of the stage C211 of the cryocooler C21, a line 2827 of the second exchanger E22 and a line 2829 of the stage C212 of the cryocooler C21. The fourth supply branch also obviously includes lines 2822, 2824, 2826, 2828 and 2830 completing the lines 2823, 2825, 2827 and 2829 so as to guide a portion of the refrigerant fluid of the compressor 210 to the NMR device. Thus, a second portion of the refrigerant flows from the compressor to the NMR device through the third exchanger E23, the C211 stage of the cryocooler C21, the second exchanger E22 and the C212 stage of the cryocooler C21. Preferably, the fluid passes through the different elements in this order.
    The first portion of fluid passing through the supply circuit is constituted by: a first stream whose function is to rotate the sample holder, by acting on blades or vanes of a driving turbine of a rotor of the NMR device, the rotor comprising the sample holder; and - a third stream which creates an aerostatic bearing of rotor lift in a stator of the NMR device; and, optionally, a fourth stream makes it possible to cool the heat shield protecting the NMR device from thermal radiation.
    Thus, the third branch of circulation comprises three sub-branches. The first exchanger and the second cryorefrigerator thus have at the third branch as many pipes as sub-branches.
    The second portion of fluid passing through the supply circuit is constituted by a second flow whose function is to bring the sample to a suitable temperature.
    The second branch includes a flow regulator 2628.
    The third branch includes three flow controllers 2811. They allow to regulate and / or regulate the flows circulating in the three sub-branches.
    The fourth branch includes a 2821 flow controller.
    These regulators are preferably of the flowmeter-regulator type, that is to say that they also make it possible to measure flow rates.
    The piping system 250 also includes a control module 205 as a microcontroller for receiving flow information and calculating accordingly commands that are transmitted to the regulators. These orders determine configurations of the different regulators.
    In the first and second embodiments, the references of identical elements or having the same function differs only in their first digit: a "1" for the elements of the first mode and a "2" for the elements of the second mode.
    In the various embodiments, the different exchangers are preferably countercurrent exchangers.
    In the various embodiments, the fluid used is for example helium.
    In the various embodiments, the NMR device comprises the rotor or sample holder 121; 221 and the stator 122; 222. The invention also relates to a method of operating a system 100; 200; 150; 250 previously described. In this process, the flow rates in the various branches are regulated.
    Advantageously, the flow rate regulation is such that the fluid flow rates in the first and third branches are equal or substantially equal.
    Advantageously, the regulation of the flows is such that the flows in the second and fourth branches are equal or substantially equal. In particular, the regulators 1628 and 1821 or 2628 and 2821 are slaved to respect this equality.
    The flow rates mentioned above are mass flow rates.
    In Figures 1 and 2, different numbers appear in addition to the reference signs. These are examples of fluid temperatures at different points in the piping system where the numbers are located, that is, at the inlet and outlet of the exchangers, cryocoolers, and the NMR device. These temperatures are expressed in Kelvin.
    According to the invention, the fact of separating the flow whose function is to bring the sample to a suitable temperature of the other streams whose function is to rotate the sample holder, to create an aerostatic bearing of the rotor lift in a stator of the NMR device, or to cool the thermal shield protecting the NMR device from thermal radiation, offers a great flexibility in the operation of the NMR system.
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    claims
    1. Piping system (150; 250) fluid for NMR system (100; 200), characterized in that the pipeline system comprises an exhaust circuit (160; 260) of the NMR system comprising a first branch (161; 261) and a second fluid circulation branch (162; 262).
    [2" id="c-fr-0002]
    2. System according to the preceding claim, characterized in that the first branch does not include a cryocooler line and / or the second branch comprises a line (1622; 2622) of a first cryocooler (C11; C212).
    [3" id="c-fr-0003]
    3. System according to any one of the preceding claims, characterized in that the first branch comprises a line (1612; 2612) of a first exchanger (E11; E21) and / or in that the second branch comprises a line ( 1624; 2624) of a second heat exchanger (E12; E22) and a pipe (1626; 2626) of a third heat exchanger (E13; E23).
    [4" id="c-fr-0004]
    4. System according to any one of the preceding claims, characterized in that the system comprises a supply circuit (180; 280) of the NMR system comprising a third branch (181; 281) of fluid circulation and a fourth branch ( 182; 282) of fluid circulation.
    [5" id="c-fr-0005]
    5. System according to the preceding claim, characterized in that the third branch (181; 281) of fluid circulation comprises several sub-branches, including a first sub-branch of a first flow flow whose function is to implement rotating a sample holder, by acting on blades or vanes of a turbine driving a rotor of the NMR device, the rotor comprising the sample holder, and / or a second sub-branch of circulation of a second flow whose function is to create a rotor levitation bearing in a stator of the NMR device and / or a third flow sub-branch of a third stream whose function is to cool a heat shield protecting the NMR device from thermal radiation .
    [6" id="c-fr-0006]
    6. System according to claim 4 or 5, characterized in that the third branch comprises at least one duct (1814; 2814) of a second cryocooler (C12; C211) and / or in that the fourth branch comprises a duct ( 1825, 2825) of a third cryocooler (C13; C211) and a line (1829; 2829) of a fourth cryocooler (C14; C212).
    [7" id="c-fr-0007]
    7. System (250) according to claim 6, characterized in that the second cryocooler and the third cryocooler are a same cryocooler, including the same stage (C211) of a cryocooler.
    [8" id="c-fr-0008]
    8. System (250) according to claim 6 or 7 and according to claim 2, characterized in that the first cryocooler and the fourth cryocooler are a same cryocooler, including the same stage (C212) of a cryocooler.
    [9" id="c-fr-0009]
    9. System (250) according to claims 7 and 8, characterized in that it comprises a single cryocooler (C21), including a cryocooler comprising a first stage (C211) and a second stage (C212).
    [10" id="c-fr-0010]
    10. System according to one of claims 4 to 9, characterized in that the third branch comprises at least one pipe (1812; 2812) of the first exchanger (E11; E21) and / or in that the fourth branch comprises a pipe (1823, 2823) of the third exchanger (E13; E23) and a line (1827; 2827) of the second exchanger (E12; E22).
    [11" id="c-fr-0011]
    11. System according to one of the preceding claims, characterized in that the second branch comprises a flow regulator (1628; 2628).
    [12" id="c-fr-0012]
    12. System according to one of the preceding claims and according to claim 4, characterized in that the third branch comprises at least one flow regulator (1811; 2811) and / or in that the fourth branch comprises a flow regulator ( 1821; 2821).
    [13" id="c-fr-0013]
    An NMR system (100; 200) comprising a pipeline system (150; 250) according to any one of the preceding claims and an NMR device (120; 220) including an NMR analysis device.
    [14" id="c-fr-0014]
    A method of operating a system (100; 200; 150; 250) according to any one of claims 4 to 13 and claim 4, wherein the flow rates are regulated so that the fluid flow rates in the first and third branches are equal or substantially equal and / or wherein the fluid flow rates are regulated so that the flows in the second and fourth branches are equal or substantially equal.
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    同族专利:
    公开号 | 公开日
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    FR3046678B1|2018-02-16|
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    优先权:
    申请号 | 申请日 | 专利标题
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    FR1650224|2016-01-12|FR1650224A| FR3046678B1|2016-01-12|2016-01-12|SYSTEM FOR FLUID CHANNELING OF AN NMR SYSTEM AND METHOD FOR OPERATING SUCH A SYSTEM|
    US15/403,703| US10310032B2|2016-01-12|2017-01-11|Fluid channelling system of an NMR system and method of operating a system of this kind|
    EP17151070.4A| EP3196665A1|2016-01-12|2017-01-11|Fluid piping system for an nmr system and method for operating such a system|
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