• 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:
    The invention relates to a cryostat with a vacuum container (1) and a cryogenic container (2) installed therein, and a sleeve (8), in which a cryocooler (7) is installed, wherein the upper warm end of the sleeve with the vacuum container (1). is connected and the lower cold, the cryocontainer end facing by a sleeve bottom (9) is gas-tight, and wherein the cryocontainer contains a superconducting magnet assembly (3). The cryocontainer is hermetically sealed except for a gas capillary (13) and filled with gaseous fluid (12) at a pressure below the vapor pressure of the liquid phase of the fluid at the appropriate operating temperature, and the coldest stage of the cryocooler is in a good heat conducting manner a lying within the cryogenic container heat exchanger (11). Thus, the superconducting magnet assembly can be cooled within the cryocontainer without cryogenic liquid and at the same time without direct mechanical coupling to the cryocooler, during the operating time can be dispensed with the handling of cryogenic liquids and leakage of cold fluid in the case of a quench of the superconducting magnet assembly is avoided ,
    公开号:CH705269B1
    申请号:CH00930/12
    申请日:2012-07-03
    公开日:2016-04-15
    发明作者:Kraus Andreas；Hinderer Joerg；Bär Alexander
    申请人:Bruker Biospin Ag；
    IPC主号:
    专利说明:

    The invention relates to a Kryostatanordnung with a vacuum container and a built-in cryocontainer, and a sleeve, in which a cryocooler is installed, wherein the upper warm end of the sleeve is connected to the vacuum tank and the lower cold, the cryocontainer facing end by a sleeve bottom is sealed gas-tight and the cryocontainer contains a superconducting magnet assembly.
    Such an arrangement is known from US 2006/022 779 A1
    The field of application of the present invention is a cryogenic system for cooling a superconducting magnet arrangement, for example, for applications of magnetic resonance spectroscopy (= NMR) or magnetic resonance imaging (MRI =).
    Typically, superconducting magnet assemblies in a cryocontainer are typically cooled with liquid helium or liquid nitrogen to maintain the temperature below the critical temperature. In this case, the superconducting magnet arrangement at least partially immersed in the liquid cooling fluid. This results in a very temperature-stable and uniform cooling within the cryocontainer. Such bath cooled systems are common for, for example, NMR spectrometers. In these systems, liquid helium is used as cooling fluid, which must be replenished at regular intervals, since the heat input to the cryocontainer ensures a constant evaporation of the cooling fluid. Such a system according to the state of the art according to US 2006/0 021 355 A1, US 2002/0 002 830 A1 and US 2006/022 779 A1 cited at the outset are shown schematically on the basis of FIG. 2.
    In the interior of a vacuum container 1, a cryocontainer 2 is arranged. The cryocontainer 2 is at least partially filled with a liquid fluid 4, typically liquid helium, and contains a superconducting magnet assembly 3 which generates a magnetic field. A room temperature tube 5 makes it possible to arrange a measuring device, which is not shown here, in the magnetic field. At least one discharge and filling opening 6 is provided to transfer the cooling fluid 4 into the cryocontainer 2 and to discharge it again.
    Rising helium costs and the availability of suitable cooling machines have led to methods have been developed to minimize the consumption of liquid helium or to completely dispense with liquid helium. Such systems are cooled by means of cryocoolers. In order to reach temperatures of 3 to 4 Kelvin, multi-stage coolers of the type Gifford-McMahon or Pulse-Tube are used. As a result of a steady heat input to the cryocontainer 2, the cooling fluid 4 evaporates and can be recondensed at the cold stage of the cryocooler 7.
    These arrangements, which recondensing evaporating cooling fluid, systematically contain more or less liquid cooling fluid in the cryocontainer, which is in contact with the superconducting magnet assembly. The cooling fluid must be filled at least during the installation of the system. An important aspect in these arrangements is the vibration isolation between cryocooler 7 and magnet assembly 3 and the disassembly of the cryocooler 7 for service work, without the magnet assembly 3 must be discharged. This is achieved by the fact that the cold stage of the cryocooler 7 is arranged freely in the vapor phase of the cooling fluid and thus is not connected directly to the magnet assembly 3. In such a device, the cryocooler 7 is installed in a sleeve 8, which is connected at the upper end to the vacuum container 1 and at the lower end to the cryocontainer 2, so that the sleeve 8 is thus open at the bottom against the cryocontainer 2, whereby the vaporized Condense cooling fluid directly to the cold stage of the cryocooler 7 and can flow back into the cryocontainer 2.
    In another arrangement - described by way of example in US 2006/022 779 A1 - the sleeve 8 is sealed with the built-cryocooler 7 at the bottom by a sleeve bottom 9. The sleeve 8 then forms its own closed against the cryocontainer 2 and vacuum tank 1 space. The evaporating fluid of the cryocontainer 2 condenses on the underside of the sealed sleeve 8, and the heat transfer from the condensing fluid in the cryocontainer 2 to the cold stage of the cryocooler 7 via a thermally well conductive partition.
    A disadvantage of such arrangements is the dependence on liquid cryogens which are needed for cooling and operation of the magnet assembly. This requires special equipment for filling and procurement of the necessary storage containers.
    In superconducting magnet assemblies, for example, by spontaneous conductor movements due to the force acting on the superconducting magnetic forces a conductor portion are normally conducting. This can spread to the entire coil. In such a magnetic quench, the magnetic energy of the coil is converted into heat within seconds and all liquid cooling fluid 4 evaporates very quickly and leads to an increase in pressure in the cryocontainer 2 and a heavy ejection of cold gas. Therefore, constructive measures must be taken in order to be able to ensure a sufficiently large line cross-section between the cryocontainer 2 and the environment for the outflowing cryogenic gas. In addition, the outflowing gas usually has to be drained away from the room in which the device is installed by means of a separate pipeline, since otherwise the oxygen content in the surrounding air could sink to dangerously low levels or persons could be injured by the cold gas. Accordingly, a magnetic quench must be safeguarded by means of correspondingly complex measures. For this reason, it would be desirable to be able to dispense as completely as possible with cryogenic liquids in the cryocontainer 2.
    Object of the present invention is in contrast to improve a technically simple and inexpensive means a cryostat of the type described above to the effect that the superconducting magnet assembly can be cooled within the cryocontainer without cryogenic liquid and at the same time without direct mechanical coupling to the cryocooler , The user of the apparatus should be able to dispense with the handling of cryogenic liquids such as helium and nitrogen during operation. Another object of the invention is to avoid cold outflow fluid in the event of a quench of the superconducting magnet assembly.
    This object is achieved in a surprisingly simple yet effective manner in that the cryocontainer is hermetically sealed except for a gas capillary and filled with gaseous fluid under a pressure below the vapor pressure of the liquid phase of the fluid at the appropriate operating temperature, and that the coldest stage of the cryocooler is connected in a thermally conductive manner to a heat exchanger located inside the cryocontainer.
    Numerous advantages of the arrangement according to the invention over devices according to the prior art result in the following points:
    The cryocontainer with the superconducting magnet arrangement remains sealed during the entire operating time, and therefore no additional cooling medium is required for the operation. Consequently, during the life of the system, no cooling fluid must be refilled.
    The superconducting magnet arrangement is cooled without contact via the heat exchanger arranged in the cryogenic container, since convection currents develop within the gaseous fluid, which ensure good heat transfer between the heat exchanger, cryocontainer and the magnet arrangement arranged therein.
    In contrast to a direct mechanical connection of cryocooler and solenoid coil vibration isolation is possible with the inventive arrangement, which only allows operation as part of a high-resolution NMR or MRI spectrometer.
    The cryocontainer can be cooled fully automatically by means of the cryocooler, since no cryogenic liquids must be supplied.
    In the case of unexpected large heat input to the cryocontainer, e.g. a quench of the superconducting magnet arrangement or a vacuum fracture of the isolation vacuum in the vacuum container can be avoided that large amounts of cold fluid flow out, as is inevitably the case with bath-cooled systems. Accordingly, the safety for the user increases in the arrangement according to the invention.
    In a preferred embodiment, the cryocontainer is accessible only via a thin and poorly heat-conducting, for example austenitic steel existing gas capillary from the outside. This gas capillary is guided via a vacuum-tight passage through the outer wall of the vacuum vessel and has a shut-off valve, which allows to close the gas space of the cryocontainer hermetically. It is advantageous to fill the cryocontainer before cooling by means of this gas capillary with a defined gas pressure and then tightly close the capillary outside the vacuum container via, for example, a shut-off valve. The cryocooler is installed in a hermetically sealed sleeve and the coldest stage of the radiator is in good thermal contact with the bottom of the sleeve. Since no more fluid is recondensed in the cryocontainer, the otherwise required Recondenser is replaced by a simple large-area heat exchanger within the cryocontainer. The bottom of the sleeve is therefore in good thermal contact with this heat exchanger.
    A further advantageous embodiment of the inventive arrangement is that the heat exchanger is formed in the cryocontainer by a coiled and hermetically sealed tube. This tube is filled with hydrogen, helium, neon, nitrogen or a mixture of these gases and hermetically sealed before cooling the system at room temperature with the highest possible inflation pressure. By cooling, the pressure in this tube will decrease according to the isochoric equilibrium pressure. This closed tube then serves as an additional thermal buffer to keep the temperature in the cryocontainer stable.
    In a further embodiment of the inventive arrangement, the sleeve is permanently connected to the built-cryocooler via a connecting line with pressure reducing valve with an external compressed gas cylinder. At room temperature, a defined gas pressure is set in the sleeve before cooling. This gas pressure is maintained during the cooling process, whereby gas flows from the gas cylinder constantly. Otherwise, the initial gas pressure in the hermetically sealed sleeve would steadily decrease due to the decreasing average temperature within the sleeve. Falls below the vapor pressure of the gas supplied forms a reservoir of liquid of the gas used in the lower part of the sleeve. This liquid improves heat transfer from the bottom of the sleeve to the coldest stage of the cryocooler and allows the cryocooler to be completely non-contact with the bottom of the sleeve.
    A further advantageous embodiment of the inventive arrangement is used in particular to improve the heat transfer from the cold stage of the cryocooler to the heat exchanger within the cryocontainer. For this purpose, the heat exchanger is brought into contact with a thermosyphon. The thermosyphon can be designed as a pipe whose beginning and end ends in the sleeve and vacuum-tight through the wall of the sleeve and the lid of the cryocontainer is performed. The thermosyphon functions so that the liquid fluid which has formed in the sleeve flows down in the tube of the thermosyphon and evaporates in contact with the heat exchanger and then flows back to the sleeve in gaseous form. With this arrangement, in particular, the temperature gradient between cryocooler and gas heat exchanger can be minimized. As a further feature of this embodiment can therefore be dispensed with a good thermal contact between the sleeve bottom and the heat exchanger.
    Further advantages of the invention will become apparent from the description and the drawings. Likewise, the features mentioned above and those listed further can be used individually or in any combination. The embodiments shown and described are not to be understood as exhaustive enumeration, but rather have exemplary character for the description of the invention.
    [0024] In the drawings:<Tb> FIG. 1 shows a schematic cross section of the cryostat arrangement according to the invention with a hermetically sealed cryogenic container filled with a gaseous fluid-filled cryocooler, a cryocooler installed in a closed sleeve, and a heat exchanger in the cryocontainer;<Tb> FIG. 2 is a schematic cross section of a cryostat arrangement according to the prior art with a cryocooler installed in a closed sleeve and a recondenser for re-liquefying the cooling fluid in the cryocontainer;<Tb> FIG. 3 shows a schematic cross section of the inventive cryostat arrangement according to a further embodiment with a heat exchanger in the form of a gas-filled and hermetically sealed tube coil;<Tb> FIG. 4 shows a schematic cross section of the inventive cryostat arrangement according to a further embodiment with an external gas cylinder for filling the sleeve; and<Tb> FIG. FIG. 5 shows a schematic cross section of the inventive cryostat arrangement according to a further embodiment with a thermosiphon between sleeve and heat exchanger. FIG.
    For cooling a superconducting magnet arrangement within a cryogenic container, instead of a fluid in the liquid state of matter, such is used in the gaseous state of matter. The fluid is cooled to the required operating temperature by thermal contact with a cryocooler.
    The cryocooler is installed in a hermetically sealed sleeve and the coldest stage of the radiator is in good thermal contact with the bottom of the sleeve. Since no more fluid is recondensed in the cryocontainer, the recondenser required in arrangements according to the prior art is replaced by a large-area heat exchanger. The bottom of the sleeve is in good thermal contact with this heat exchanger. The adjoining spaces of the sleeve for receiving the cryocooler and the cryocontainer for receiving the superconducting magnet assembly are thus hermetically separated from each other.
    In this arrangement, a superconducting magnet assembly can now be cooled via the gas atmosphere within the cryocontainer, which among other things allows for improved vibration decoupling, since no direct connection of cryocooler and magnet assembly is necessary. Within the sleeve, a different fluid or a different pressure can be selected independently of the cryocontainer.
    By choosing a large-area heat exchanger is achieved that the superconducting magnet assembly is cooled by a forming convection much more effective than by pure heat conduction through the cooling fluid. To ensure the required heat transfer coefficient, the area of the heat exchanger should be at least 1000 cm <2>.
    The cryocontainer is accessible only via a thin and poorly heat-conducting, for example made of austenitic steel gas capillary for filling or emptying a cooling fluid. This gas capillary is passed through a vacuum-tight passage through the outer wall of the vacuum vessel. It is advantageous to fill the cryocontainer before cooling by means of this gas capillary with the cooling fluid under a defined gas pressure and then close the gas capillary tightly outside the vacuum container via, for example, a shut-off valve. Typically, the cryocontainer is filled prior to cooling at room temperature with a pressure of 1 bar. During the cooling process, the pressure in the cryocontainer will decrease according to the isochoric equilibrium pressure, and the cooling fluid will be selected to maintain the gaseous state of aggregation up to the final temperature. When using helium gas as the cooling fluid and a final temperature of 4 K, the pressure, for example, from 1 bar at room temperature by cooling to 13 mbar will reduce without liquid helium is formed. A higher filling pressure improves the convective heat transfer from the heat exchanger to the superconducting magnet arrangement within the cryocontainer. The initial filling pressure is accordingly also dependent on the mechanical design of the cryocontainer and the maximum permitted pressure. The achievable final temperature is largely determined by the cryocooler used and is chosen so that the superconducting magnet assembly can be operated as intended.
    A significant advantage of the inventive arrangement over the prior art is the safety aspect in dealing with cryogenic liquids. Since the cryocontainer is filled at room temperature and then hermetically sealed, no measures must be taken to derive the cooling fluid in a magnetic quench, since the magnetic energy of a superconducting solenoid is too small to heat them above room temperature. This ensures the safety of the system throughout its lifetime, and the operator of the system never comes into contact with cryogenic liquids or gases. With a complete warming up of the cryocontainer during longer downtimes, the initial filling pressure will again set in the cryocontainer. The cooling or warming up of the cryocontainer can be carried out fully automatically only by switching the cryocooler on or off.
    In order to improve the temperature stability within the cryocontainer, the heat exchanger can also be designed in the form of a closed and coiled tube, which also produces a large surface area for the heat transfer to the cooling fluid. Before cooling the system at room temperature, this tube is filled with, for example, helium, neon or nitrogen at the highest possible filling pressure of typically 200 bar and hermetically sealed. By cooling, the pressure in this tube will decrease according to the isochoric equilibrium pressure. When using helium gas and an initial pressure of 200 bar at 293 K, for example, results in a pressure of 0.81 bar at 4 K. Under these circumstances, a part of the gas in the tube is liquefied. This designed as a closed tube heat exchanger then serves as an additional thermal buffer to keep the temperature in the cryogenic container stable. This arrangement has the advantage that the heat exchanger is used as a thermal reservoir in case of failure of the cryocooler, for example, due to a power interruption and the superconducting magnet assembly can hold so cold for a short period of time of typically one hour that a quenching can be avoided. This is due to the fact that in particular helium at cryogenic temperatures has a very high specific heat compared to solids, which is further improved by the fact that a part of the helium is liquefied and in addition, the evaporation enthalpy can be used in a temperature increase. However, this principle can also be applied to other gases.
    Since the sleeve with built-cryocooler forms a hermetically sealed space, there can be filled regardless of the cryocontainer also a fluid. When using a fluid in comparison to a vacuum, in particular the cold stage of the cryocooler can be decoupled mechanically from the bottom of the sleeve, since the heat transfer is ensured by the filled fluid. As a result, the vibration input from the cryocooler to the superconducting magnet arrangement can again be greatly reduced.
    To fill the sleeve, it is useful to connect a high pressure gas cylinder of the desired fluid by means of pressure reducing valve with the warm end of the sleeve. With this arrangement, the pressure within the sleeve can be kept constant even during the cooling process by the pressure decreases with decreasing mean temperature within the sleeve and gas automatically nachfliesst. In particular, it can be achieved by selecting the appropriate fluid liquefaction thereof in the lower coldest part of the sleeve. The temperature of the liquid can be adjusted above the set equilibrium pressure, as long as the cryocooler reaches this temperature. Accordingly, as the gas, for example, helium, neon or nitrogen can be selected. Since the sleeve is getting warmer towards the top, an equilibrium state and a constant filling level can be formed by itself.
    Another advantage of this arrangement is the thermal reservoir formed by the liquid. In case of failure of the cryocooler, the liquid in the neck tube will slowly evaporate and so can keep the temperature of the cryocontainer and the superconducting magnet assembly constant over time.
    To improve the heat transfer between the bottom of the sleeve and the heat exchanger within the cryocontainer, the liquid can now be guided within the sleeve in a closed thermosiphon pipe to the heat exchanger, where it is in good thermal contact with it. The liquid in the thermosiphon vaporizes in the contact area and is led in vapor form back into the sleeve. With this arrangement can be achieved that the temperatures of the liquid within the sleeve and the heat exchanger differ only slightly, which in turn can cool the cooling fluid within the cryogenic container to a lower temperature.
    Specific embodiments of the invention will be described with reference to FIGS. 1 and 3 to 5:
    Fig. 1 shows an embodiment of the inventive cryostat arrangement. In a vacuum container 1, a cryocooler 7 is installed in a sleeve 8 for cooling a cryocontainer 2 with a superconducting magnet assembly 3 contained therein, which is closed at the bottom by a sleeve bottom 9 gas-tight. The sleeve bottom 9 is in good thermal contact with a heat exchanger 11, which is located within the cryocontainer. The sleeve bottom 9 may be a component of the cryocontainer; Sleeve 8 and cryocontainer 2 form but two separate rooms. The surface of the inventive heat exchanger 11 is substantially larger than that of the Recondensers 10 in the known from the prior art arrangement of FIG. 2nd
    The cryocontainer is filled with a gaseous cooling fluid 12 and accessible only via a gas capillary 13. The gas capillary 13 is guided vacuum-tight through the wall of the vacuum container 1 and serves to fill the cryocontainer 2 before cooling with the cooling fluid 12 under a defined gas pressure. The superconducting magnet assembly 3 is cooled by convection flow starting from the heat exchanger 11. The cryostat assembly also includes a room temperature tube 5 which allows access to the magnetic center for, for example, NMR applications.
    Fig. 2 shows a conventional arrangement according to the prior art discussed above. The cryocontainer 2 is filled with a liquid cooling fluid 4 and a superconducting magnet assembly 3 is immersed in the liquid cooling fluid 4. Evaporating cooling fluid condenses on a recondenser 10 and drips back into the fluid. For cooling the Recondensers 10, a cryocooler 7 is installed in a bottom closed sleeve 9.
    The cryocontainer is connected to the vacuum container 1 via at least one discharge and filling opening 6.
    Fig. 3 shows a further embodiment of the inventive arrangement in which the heat exchanger 14 is formed in the cryocontainer 2 by a turned and hermetically sealed tube. This tube spiral 14 is filled with a high gas pressure of a suitable fluid 12 before cooling the cryocontainer 2 and subsequently hermetically sealed. The designed as a tube coil heat exchanger 14 is in good heat conducting contact with the bottom 9 of the sleeve 8 and the cold stage of the cryocooler. 7
    Fig. 4 shows a further advantageous embodiment of the inventive arrangement in which the sleeve 8 is continuously connected via a gas connection line 16 with pressure reducing valve with an external compressed gas cylinder 17. At room temperature, a defined gas pressure is set in the sleeve 8 before cooling. This gas pressure is maintained during the cooling process, whereby gas flows from the gas cylinder 17 constantly. Otherwise, the initial gas pressure in the hermetically sealed neck tube would steadily drop as a result of the falling average temperature of the sleeve 8. Falls below the vapor pressure of the gas supplied forms a reservoir of the liquid phase of the gas used in the lower part of the sleeve. This liquid 15 improves the heat transfer from the sleeve bottom 9 to the coldest stage of the cryocooler 7 and allows to store the cryocooler 7 completely non-contact to the bottom 9 of the sleeve. The temperature of the liquid 15 can be adjusted via the set equilibrium pressure, if the cryocooler 7 reaches this temperature. Accordingly, as the gas, for example, helium, neon or nitrogen or a mixture thereof can be selected. Since the sleeve 8 is getting warmer towards the top, an equilibrium state and a constant filling level is formed by itself.
    Fig. 5 shows a further advantageous embodiment of the inventive arrangement according to FIG. 4, which in particular provides an improved heat transfer from the heat exchanger 11 to the cryocooler 7. For this purpose, the heat exchanger 11 is brought with a thermosiphon 18 in a good heat conducting connection. The thermosyphon 18 can be designed as a pipe and works so that the liquid 15 flows from the sleeve 8 in the thermosiphon 18 down, evaporates in contact with the heat exchanger 11 within the thermosyphon 18 and the vapor rises in a second pipe of the thermosyphon 18 and is returned to the sleeve 8 above the liquid level. With this arrangement, in particular, the temperature gradient between cryocooler 7 and heat exchanger 11 can be minimized. As a further feature of this embodiment can therefore be dispensed with a good thermal contact between the sleeve bottom 9 and the heat exchanger 11.
    LIST OF REFERENCE NUMBERS
    [0044]<Tb> 1 <September> vacuum vessel<Tb> 2 <September> cryogenic<Tb> 3 <September> magnet arrangement<tb> 4 <SEP> Liquid cooling fluid<Tb> 5 <September> room temperature pipe<tb> 6 <SEP> Drain and fill port<Tb> 7 <September> cryocooler<Tb> 8 <September> Barrel<Tb> 9 <September> sleeve base<Tb> 10 <September> Recon Denser<Tb> 11 <September> Heat Exchanger<tb> 12 <SEP> Gaseous fluid in the cryocontainer<Tb> 13 <September> gas capillary<Tb> 14 <September> tube heat exchanger<tb> 15 <SEP> Fill fluid in the sleeve<Tb> 16 <September> Connection line<Tb> 17 <September> compressed gas cylinder<Tb> 18 <September> thermosiphon
    权利要求:
    Claims (8)
    [1]
    1. cryostat assembly with a vacuum container (1) and a cryogenic container (2) installed therein, and a sleeve (8), in which a cryocooler (7) is installed, wherein the upper warm end of the sleeve (8) with the vacuum container (1 ), and the lower cold end facing the cryocontainer (2) is closed gas-tight by a sleeve bottom (9), and wherein the cryocontainer (2) contains a superconducting magnet arrangement (3), characterized in that the cryocontainer (2) to is hermetically sealed to a gas capillary (13) and filled with gaseous fluid (12) at a pressure below the vapor pressure of the liquid phase of the fluid at the appropriate operating temperature and the coldest stage of the cryocooler (7) in a thermally conductive manner with one within the Cryogenic container (2) lying heat exchanger (11, 14) is connected.
    [2]
    2. Cryostat arrangement according to claim 1, characterized in that within the cryocontainer (2) lying heat exchanger (11; 14) has a surface of at least 1000 cm <2>.
    [3]
    3. Cryostat arrangement according to one of the preceding claims, characterized in that within the cryocontainer (2) lying heat exchanger (14) consists of a hermetically sealed tube coil, which with a gas or gas mixture consisting of helium, hydrogen, neon and / or nitrogen , is filled.
    [4]
    4. cryostat assembly according to any one of the preceding claims, characterized in that the sleeve (8) filled with a gas or gas mixture consisting of helium, hydrogen, neon or nitrogen and the gas pressure is adjusted so that liquid (15) at the lower end of Sleeve (8) forms.
    [5]
    5. cryostat assembly according to claim 4, characterized in that the coldest stage of the cryocooler (7) without contact to the sleeve (8) and the sleeve bottom (9) is mounted.
    [6]
    6. cryostat assembly according to claim 4, characterized in that between the sleeve (8) and within the cryocontainer (2) lying heat exchanger (11; 14) a thermosyphon (18) is mounted, which in a heat-conducting manner with the heat exchanger (11; ), so that the liquid (15) evaporates in the thermosyphon (18) and the vapor above the liquid level is returned to the sleeve (8).
    [7]
    7. A method for operating a Kryostatanordnung according to any one of the preceding claims, characterized in that the cryocontainer (2) before cooling at room temperature via the gas capillary (13) filled with 1 bar helium gas and then sealed.
    [8]
    8. NMR or MRI spectrometer, comprising a cryogenic system for cooling a superconducting magnet arrangement, characterized in that the cryocooler (7) of the cryogenic system and the magnetic coil of the superconducting magnet arrangement are arranged in a Kryostatanordnung according to one of the preceding claims 1 to 6 ,
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    同族专利:
    公开号 | 公开日
    GB2492645B|2016-12-14|
    US20130008187A1|2013-01-10|
    GB201211751D0|2012-08-15|
    DE102011078608A1|2013-01-10|
    GB2492645A|2013-01-09|
    CH705269A2|2013-01-15|
    GB2492645B8|2017-04-05|
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    法律状态:
    2019-10-31| PFA| Name/firm changed|Owner name: BRUKER SWITZERLAND AG, CH Free format text: FORMER OWNER: BRUKER BIOSPIN AG, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102011078608A|DE102011078608A1|2011-07-04|2011-07-04|cryostat|
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