215 results about "Cryostat" patented technology

Systems and techniques that facilitate scalable cryostats and cryogenic systems are provided. In an embodiment, a cryogenic system can comprise a plurality of unit cells joined together, wherein each unit cell comprises: a trapezoidal-shaped frame, wherein frames from adjacent unit cells are connected in a vacuum-tight manner to form a continuous, global vacuum enclosure, and wherein the unit cells are capable of being horizontally removed from or inserted into the plurality of joined unit cells. Furthermore, each unit cell can comprise at least one temperature shell, wherein temperature shells from adjacent unit cells are connected to form a continuous, global temperature shell. Moreover, each unit cell can comprise at least one cryogenic payload located within the at least one temperature shell, that is cooled by at least one retrofitted version of a standard dilution refrigerator.

The application discloses a multi-model adaptive low-temperature valve sealing performance testing device and method, and belongs to the technical field of valve detection. The device comprises: a first upper end cover of a low-temperature thermostat, wherein a to-be-tested low-temperature valve is installed on the first upper end cover through a valve support device; the valve support device is in flexible sealing cooperation with a bellows through an adjusting screw, so that the installation height and centering of the to-be-tested low-temperature valve are controlled, and low-temperature valves of different specifications are adapted; the low-temperature thermostat surrounds a first cold screen and a second cold screen; the bottom of the to-be-tested low-temperature valve is connected with one end of a cold-lead bridge through a pipe clamp and is surrounded by the first cold screen; a GM refrigerating machine comprises two-stage cold heads arranged in the low-temperature thermostat; the second cold screen surrounds the two-stage cold heads; the other end of the cold-lead bridge is connected with the two-stage cold heads; three helium supply devices are connected with the inlet and outlet of the to-be-tested low-temperature valve and the low-temperature thermostat respectively; and a vacuum pump unit is connected with the low-temperature thermostat. The application realizes rapid adaptation and accurate testing of low-temperature valves of multiple models.

The invention relates to the field of particle accelerators, and provides a wire drawing device and a wire drawing method for a tension wire in a cold shield of a cryostat. The wire drawing device for the tension wire in the cold screen of the cryostat comprises a first bridging pipe, a second bridging pipe and an internal guide body, and the first bridging pipe and the second bridging pipe are inserted into the cold screen from the two opposite sides of a vacuum chamber of the cryostat respectively and connected with a tension wire instrument corresponding to the interior of the cold screen in a sleeved mode; the end, close to the second bridging pipe, of the first bridging pipe is provided with a first reducing section. Due to the fact that the inner diameter of the first reducing section is gradually increased in the direction close to the second bridging pipe, the end, close to the first bridging pipe, of the second bridging pipe can be easily inserted into the first reducing section, and the interior of the first bridging pipe and the interior of the second bridging pipe are communicated to form a wire guiding channel. Therefore, under the condition that the cover plate does not need to be opened, stable and lasting stretching of the linear reference can be rapidly achieved with high precision, the accuracy of deformation monitoring of the cryostat is ensured, and the experiment efficiency is improved.

The invention relates to a storage cryostat (2) for liquid helium (7), suitable for transferring liquid helium (7) from the storage cryostat (2) into an application cryostat (3), wherein the storage cryostat (2) comprises: - a vacuum-insulated helium vessel (6) for liquid helium (7), the helium vessel (6) having a vertical height HHB that can be filled with liquid helium (7), - a transfer line (4) for liquid helium (7), having an inlet opening (20) which opens into a lower region of the helium vessel (6), in particular into a lower fifth of the helium vessel (6), and - a convection-suppression system (9) which is arranged within the helium vessel (6) and impedes vertical convection of liquid helium (7) in the helium vessel (6), characterised in that the convection-suppression system (9) is formed in the helium vessel (6) over a height interval (IKS) with a vertical height HKS, where HKS ≥ 0.50 × HHB, and in that the convection-suppression system (9) impedes the vertical convection of liquid helium (7) in the helium vessel (6) over the region of the height interval (IKS) of the convection-suppression system (9). The invention provides a storage cryostat that enables simple and rapid transfer of liquid helium from the storage cryostat into the application cryostat, with minimised helium losses.

The utility model provides a low-temperature heat exchanger and a low-temperature thermostat. The low-temperature heat exchanger comprises a heat exchanger core, a heat exchanger shell and a cold head. The heat exchanger core is arranged in the heat exchanger shell, and the cold head is connected with the heat exchanger shell. The heat exchanger core internally comprises a first flow channel composed of a plurality of holes extending in the axial direction, and an inlet of the first flow channel is used for guiding in cooling fluid. The surface of the heat exchanger core comprises a plurality of protruding structures, the surface of the heat exchanger core and the inner surface of the heat exchanger shell form a second flow channel, and an outlet of the second flow channel is used for guiding out cooling fluid. The heat exchanger core comprises a through hole, and the through hole communicates with an outlet of the first flow channel and an inlet of the second flow channel. According to the structure of the first flow channel and the second flow channel in the low-temperature heat exchanger, the heat exchange area between the refrigerating fluid and the low-temperature heat exchanger can be increased, the heat exchange temperature difference between the refrigerating fluid and the low-temperature heat exchanger can be reduced, and the heat exchange efficiency of the low-temperature heat exchanger is improved.

The invention relates to a modularized and anti-noise variable-temperature electrical characterization test system and method, and the system comprises a vacuum pump, a cryostat, a refrigerator, a temperature controller, an electrical characterization system, and a computer. A sample table, a cold head, a heater and a temperature sensor are arranged in the cryostat; the vacuum pump is connected with the low-temperature thermostat through a vacuum pipeline and is used for adjusting the air pressure in the low-temperature thermostat; the refrigerating machine is connected with the cold head and is used for cooling the sample table; the temperature controller is used for collecting the temperature detected by the temperature sensor and controlling the heater; the computer is used for collecting data acquired by the temperature controller and the electrical characterization system and sending a control instruction to the temperature controller and the electrical characterization system; and the electrical characterization system is connected with the test sample on the sample table and is used for carrying out electrical characterization test on the test sample under modular configuration. According to the invention, the anti-noise capability in the data acquisition process can be improved.

Systems and techniques for facilitating scalable cryostats and cryogenic systems are provided. In one embodiment, the cryogenic system (300) may include a plurality of unit cells (304) coupled together, wherein each unit cell includes a trapezoidal frame (704) wherein the frames from adjacent unit cells are vacuum-sealed to form a continuous global vacuum enclosure, and wherein the unit cells are horizontally removable from or inserted into the plurality of coupled unit cells. Furthermore, each unit cell may include at least one temperature housing (508, 510, 512) wherein temperature housings from adjacent unit cells are coupled to form a continuous global temperature housing. Moreover, each unit cell may include at least one cryogenic payload (514) located within at least one temperature housing, which is cooled by at least one modified version of a standard dilution refrigeration unit.

Cryostat microtome, including: a main body; a cryostat arranged on and above the main body, wherein a receiving chamber is formed in the cryostat; a cutting device, located at least partially in the receiving chamber; a cooling system connected to and configured with the main body to provide a source of cold for the cryostat microtome, the cooling system includes a compressor and the compressor is a variable speed compressor.

This infrared radiation detector comprises: – a cryostat equipped with a cold finger, suitable for heat exchange with a cold source, and a window transparent to the infrared radiation to be detected; – a cold plate, mechanically fixed and in heat exchange with the cold finger; – a detection block comprising at least one detection matrix sensitive to the range of infrared wavelengths to be detected, and in heat exchange directly or indirectly with the cold plate; – a cold screen mechanically fixed and in heat exchange with the cold plate and suitable for limiting parasitic radiation, the cold screen being equipped with at least one diaphragm or baffle (9), oriented radially with respect to the general orientation of the detector, and equipped with an opening suitable for allowing the transit of the optical path resulting from the incident radiation.The free edge (13) of said at least one diaphragm or baffle (9) is structured so as to define non-linear patterns (14). Figure for the abbreviation: Fig 6.

The invention relates to the technical field of transfer devices, and provides a transfer device for a cryostat, which comprises a bottom bracket, a main body bracket arranged above the bottom bracket, and a damping mechanism, a suspension mechanism and a tensioning mechanism which are arranged between the bottom bracket and the main body bracket, at least the upper end of the main body bracket is provided with an opening for the cryostat to enter and exit the accommodating space; the damping mechanism is used for attenuating or isolating a vibration load between the bottom bracket and the main body bracket; the suspension mechanism comprises a suspension support detachably arranged at the upper end of the body support, a suspension assembly used for suspending the top end of the cryostat and a hoisting assembly used for being connected with hoisting equipment. The tensioning mechanism is arranged on the main body support and used for being connected with the bottom end of the cryostat so as to limit the bottom end of the cryostat from moving relative to the main body support. By means of the arrangement, the problem that in the prior art, when the cryostat is transferred, the cryostat is prone to being damaged is solved.

A therapeutic apparatus may be provided. The therapeutic apparatus may include a radiation therapy device configured to apply therapeutic radiation to a region of interest (ROI). The radiation therapy device may include an accelerator configured to accelerate electrons in an electron beam to produce a radiation beam of the therapeutic radiation, a magnetic resonance imaging (MRI) device configured to acquire MRI data with respect to the ROI. The MRI device may include an annular cryostat including at least one annular structure enclosing one or more chambers.

This invention provides a fully enclosed microfluidic pressure control system and method, relating to the fields of cryogenic metering and precision pressure control. The system includes a first cryogenic thermostat and a second cryogenic thermostat; a connecting pipe linking the gas phase spaces of the two thermostats to form a fully enclosed gas loop; a gas flow control valve located on the connecting pipe; an active temperature control unit thermally coupled to the second cryogenic thermostat; and a central control system that, based on the deviation between the actual pressure and the target pressure of the first cryogenic thermostat, controls the active temperature control unit to adjust the temperature of the second cryogenic thermostat to generate a pressure difference, and controls the opening of the gas flow control valve according to the deviation, allowing the working gas to transfer within the fully enclosed gas loop to regulate the internal pressure of the first cryogenic thermostat. This invention achieves zero-loss recycling of the working gas and is suitable for high-precision pressure control in applications such as ultra-low temperature physics experiments, quantum computing, and cryogenic thermostats.

On-chip cryostat and method, in particular for providing one or more quantum elements, comprising a substrate; a layer structure arranged on the substrate, wherein a sample, in particular a quantum element, can be arranged on a sample surface on the side of the layer structure opposite the substrate, and a vacuum housing surrounding the layer structure; wherein the layer structure comprises at least one ADR layer.

The invention discloses a non-contact current compensation method for a high-temperature superconducting electric suspension magnet. The non-contact current compensation method specifically comprises the steps that zero-flux suspension coils are installed on a ground track at equal intervals in the train running direction; the low-temperature system is composed of an outer Dewar, a radiation screen and a refrigerating machine. The vehicle-mounted superconducting magnet is directly conducted and cooled through a refrigerating machine, and the vehicle-mounted power generation coil and the vehicle-mounted excitation coil are installed on the outer side and the inner side of the outer Dewar respectively. The surface of the radiation screen is provided with a high-temperature superconducting tape, and two ends are connected with a vehicle-mounted superconducting magnet to form a closed loop. When a train runs, the vehicle-mounted superconducting magnet induces current in the suspension coil, the vehicle-mounted power generation coil generates power by using a harmonic magnetic field of the suspension coil, the vehicle-mounted excitation coil generates a traveling wave magnetic field and induces voltage on the high-temperature superconducting strip, and based on the magnetic flux quantum coupling theory, the induced voltage has a direct-current component. The vehicle-mounted superconducting magnet is excited, and attenuation of magnet current is compensated. According to the invention, efficient and stable non-contact direct current compensation of the vehicle-mounted superconducting magnet is realized.

The invention discloses a closed low-temperature heat exchange cooling table system and a cooling method, and belongs to the technical field of ultralow-temperature refrigeration, a low-temperature thermostat and a low-temperature sample table are mounted on a scanning electron microscope, an internal channel of the low-temperature thermostat is connected with the low-temperature sample table, and the low-temperature thermostat is used for regulating and controlling the temperature of helium / nitrogen entering the low-temperature sample table; the heat exchanger is contained in a heat exchange box of the low-temperature refrigerator, the interior of the heat exchange box is in a vacuum state, the heat exchanger is connected with a cold head of the low-temperature refrigerator, and a refrigerant in the cold head of the low-temperature refrigerator in the heat exchange box absorbs heat of helium / nitrogen in the heat exchanger to reduce the temperature of the helium / nitrogen in the heat exchanger; the circulating air pump is connected with an inlet of the heat exchanger through a pipeline, an outlet of the heat exchanger is connected with one end of the low-temperature thermostat internal inflow channel, and the other end of the low-temperature thermostat internal inflow channel is connected with the low-temperature sample table. And the problem of vibration of the low-temperature sample table caused by gas-liquid phase change is avoided.

Inside the vacuum enclosure (101) of a cryostat, a plurality of temperature stages form an ordered series in a primary direction. They are cooled to respective cryogenically cooled temperatures with stages (104, 106) of a staged cooling system. A first dilution refrigerator (1001) comprises a first still (109) and a first mixing chamber (110), of which said first still (109) is located on a first still flange (501) and said first mixing chamber (110) is located on a first mixing chamber flange (502). A second dilution refrigerator (1002) comprises a second still (301) and a second mixing chamber (302), of which said second still (301) is located on a second still flange (504) and said second mixing chamber (302) is located on a second mixing chamber flange (505). Said first still flange (501) is thermally separate from said second still flange (504). Said first mixing chamber flange (502) is thermally separate from said second mixing chamber flange (505). Said second dilution refrigerator (1002) is configured for a larger cooling power than said first dilution refrigerator (1001).

An apparatus, including a scanning probe microscope base that includes a configured to be secured to an end of an insert in a cryostat; a top configured to be connected to a base of a scanning probe microscope head that is configured to be disposed inside the insert; and a damping system disposed between the frame and the top and comprising a bellows that seals the end of the insert. This sealing separates an ultra-high vacuum (UHV) environment in the insert from a high vacuum (HV) environment surrounding the end of the insert and also positions an upper surface of the top in the UHV environment.

The invention relates to an infrared imaging device (1) comprising: - an imaging system (3), - a measuring system (5) comprising: -- an array of lenses (7) situated in an image plane (9) of the imaging system, and -- an array of photodetectors (11), -- a cryostat (13) configured to cool the array of photodetectors and the array of lenses, each lens (7a, 7b) being associated with a main photodetector (11a, 11b), and each lens being configured to image an exit pupil (14) of the imaging system on an area centred on the main photodetector, the device being configured either in a first configuration, in which a distance separating two centres of adjacent main photodetectors is equal to twice a dimension of a main photodetector, or in a second configuration, in which the distance separating two centres of adjacent main photodetectors is equal to three times the dimension of a main photodetector.

The present invention belongs to the technical field related to refrigeration and cryogenic containers, and discloses a eddy-current-free liquid helium cryostat for use in a pulsed high-magnetic field environment. The cryostat comprises a sample rod, a helium chamber, a liquid nitrogen layer, a vacuum chamber, and a tail pipe. The tail pipe is composed of an inner epoxy tail pipe and an outer epoxy tail pipe, each of which is mounted via metal flanges. The epoxy tail pipe and the metal flanges are bonded together with epoxy sealant. The vacuum interlayer between the helium chamber and the vacuum chamber is interconnected with the vacuum interlayer between the inner epoxy tail pipe and the outer epoxy tail pipe. In addition, the metal flange of the inner tail pipe is precisely mounted concentrically from top to bottom, and a removable metal seal is achieved between the metal flange of the inner tail pipe and the bottom flange of the helium chamber. The present invention effectively solves the problem of liquid helium loss caused by Joule heat generated by induced eddy currents in a pulsed high-magnetic field environment in the prior art, while significantly improving the measurement accuracy of scientific experiments in a high-field pulsed high-magnetic field environment.

Technologies for an optomechanical system include an intermediate plate having a top surface with multiple tapped holes arranged in a grid. A pair of dowel pin holes surround each tapped hole in a linear pattern. Multiple optical blocks are coupled to the intermediate plate using dowel pins positioned in the dowel pin holes and corresponding dowel pin holes defined in the bottom surface of the optical block. Each optical block includes multiple optical elements coupled to the top surface of the optical block with dowel pins. A cryostat may be coupled to the intermediate plate. A cryo-package assembly is mounted inside a cryo chamber of the cryostat. The cryo-package assembly includes a cryo device such as an ion trap covered by a machined copper lid. The lid includes a meandering passageway to allow for differential pumping in order to achieve ultra-high vacuum within the cryo-package assembly.

Systems and techniques that facilitate scalable cryostats and cryogenic systems are provided. In an embodiment, a cryogenic system (300) can comprise a plurality of unit cells (304) joined together, wherein each unit cell comprises: a trapezoidal-shaped frame (704), wherein frames from adjacent unit cells are connected in a vacuum-tight manner to form a continuous, global vacuum enclosure, and wherein the unit cells are capable of being horizontally removed from or inserted into the plurality of joined unit cells. Furthermore, each unit cell can comprise at least one temperature shell (508, 510, 512), wherein temperature shells from adjacent unit cells are connected to form a continuous, global temperature shell. Moreover, each unit cell can comprise at least one cryogenic payload (514) located within the at least one temperature shell, that is cooled by at least one retrofitted version of a standard dilution refrigerator.

The utility model relates to a freezing slicer which comprises a machine body, a freezing chamber, a first sliding assembly, a heat absorption assembly and a freezing table. The freezing chamber is arranged in the slicing operation space; the first sliding assembly is arranged in the freezing chamber and comprises a connecting part and a sliding part, and the sliding part is in sliding fit with the connecting part; the heat absorption assembly is connected to the sliding part; the freezing table and the heat absorption assembly are oppositely arranged. The first sliding assembly is matched with the heat absorption assembly to move, so that the heat absorption assembly can cover all tissue sample areas of the freezing table, and heat absorption of large-batch tissue samples is realized.

The invention relates to a cryostat structure (30) for a magnetic resonance apparatus (10), the cryostat structure comprising: an outer vacuum chamber (42) enclosing a vacuum region (71); a heat radiation shield (33) disposed within the outer vacuum chamber (42) and configured to surround the magnet space (72); and a conduit (60) extending through a wall of the heat radiation shield (33) and fluidly connecting the magnet space (72) and a vacuum region (71) outside the heat radiation shield (33). The invention also relates to a magnetic resonance apparatus (10) comprising the cryostat structure (30) of the invention.

The invention provides a radio frequency resonator and an ion trap experimental device comprising the same. Wherein the radio frequency resonator comprises a shielding shell, an antenna coil and at least one spiral coil; the shielding shell is of a hollow through cylinder structure and is provided with a shielding cavity and a hollow area penetrating through the shielding shell. The antenna coil is at least partially arranged in the shielding cavity and can be connected with a radio frequency signal source; the spiral coil is arranged in the shielding cavity and is in mutual inductance coupling with the antenna coil, and the spiral coil can be connected with a load; the effective length of the antenna coil in the shielding cavity can be changed so as to adjust the mutual inductance intensity with the spiral coil and realize impedance matching. The topological structure of the radio frequency resonator is designed to be the hollow cylinder, the function of placing other devices in the hollow area of the hollow cylinder is achieved, and the radio frequency resonator has the advantage that the radio frequency resonator and the ion trap can be placed in different cold heads when the radio frequency resonator is used in the cryostat. Meanwhile, impedance matching is realized by adjusting mutual inductance in a manner of stretching and retracting the length of the antenna coil without depending on an external LC circuit.

The present invention provides a two stage cryogen cooling system for particular use in cooling a cryogen employed in a superconducting power transmission cable, the cooling system employing a sub-cooler pump such as a venturi pump to effect both cooling stages, the first cooling stage being the cooling of the liquid cryogen flowing through an inner lumen of a cryostat of the cooling system and the second stage being the generation of a supply of gaseous cryogen for supply to a second lumen of the cryostat surrounding the inner lumen.

The present invention discloses a high-temperature superconducting tokamak cryostat toroidal measurement device and an application method, which relates to the technical field of measurement. The device includes a cryostat toroid, and a top cover is arranged at the upper end of the cryostat toroid. Flange rings are arranged on the outer surfaces of the top cover and the cryostat toroid. Two installation mechanisms spliced and combined into a circular ring shape are fixedly installed at the lower end of the flange ring through bolts. In the present invention, the balls on the arc bead rod contact the surface of the flange ring and move as the flange ring expands, so that the minute thickness change of the flange ring can be detected very sensitively. The position change of the absolute value scale can accurately reflect the thickness change of the flange ring. The contact between the arc bead rod and the surface of the flange ring is dynamic, and it can quickly respond to any change of the flange ring, ensuring the real-time and accuracy of the data. By detecting the thickness change of the flange ring after thermal expansion, its sealing performance under high-temperature conditions can be evaluated.

According to an embodiment, a superconducting magnet includes a loop-shaped superconducting coil and a cryostat. The loop-shaped superconducting coil forms a static magnetic field. The cryostat has a top plate portion and a bottom plate portion and is a housing storing the superconducting coil. In at least one of a space on an inner peripheral side or a space on an outer peripheral side of the superconducting coil, a part of at least one of the top plate portion or the bottom plate portion is bent toward an inner side of the cryostat and joined to a part of the other of the top plate portion or the bottom plate portion.

The application provides an online in-situ low-temperature high-pressure ultrafast spectroscopy device, a system and a method thereof. The high-pressure device comprises a cold shield with an optical window, a metal ring, a gasket, a first pressurized air bag, a second pressurized air bag, a pressurized metal column, a diamond anvil cell, a first temperature sensor, a second temperature sensor, a heat-conducting base, a cryostat and a gas pressure controller. The online in-situ pressure calibration and imaging system comprises a continuous light laser, the high-pressure device, online in-situ pressure optical components and an online in-situ pressure imaging system. The low-temperature high-pressure ultrafast pump-probe system comprises a femtosecond laser, the online in-situ pressure calibration and imaging system, pump-probe optical components and a pump-probe imaging system. The application realizes temperature regulation at 6-325K under high pressure with double air bag pressure regulation, realizes online in-situ free pressure regulation at low temperature, and realizes continuous regulation with an accuracy of 0.1GPa in the pressure range of 0-80GPa, and realizes online in-situ low-temperature high-pressure ultrafast spectroscopy and ultrafast dynamics measurement.

This invention discloses a universal cryogenic valve heat leakage performance testing device and method, belonging to the field of valve testing technology. It includes: a cryogenic valve to be tested installed on the upper end of a cryogenic thermostat; the valve seat of the cryogenic valve to be tested connected to a valve heat exchanger via a pipe clamp; a first cold shield surrounding the valve seat; a valve support including a first flange adapted to different cryogenic valves to be tested; two cold shields installed inside the cryogenic thermostat, both with modular sidewall designs, flexibly adaptable to different cryogenic valves to be tested; two heaters connected to a temperature controller respectively installed on the heat sink and the pipe clamp; a GM refrigeration unit installed inside the cryogenic thermostat, including two-stage cold heads; a second cold shield surrounding the two-stage cold heads; a secondary cold head with a secondary heat exchanger connected to the valve heat exchanger; a helium supply device connected to the primary heat exchanger on the primary cold head; a helium recovery device connected to the valve heat exchanger; and a vacuum pump unit connected to the cryogenic thermostat. This invention improves testing efficiency and device utilization.

Provided are a heat shield and a Josephson junction array chip system, the heat shield includes a cryostat, a sensor group, a radiation shield plate, a clamp assembly, and a vacuum shield cover assembly; the cryostat includes a cold head, a first-stage chassis, and a second-stage chassis; the vacuum shield cover assembly includes a first vacuum shield cover, a second vacuum shield cover, and a heat shield aluminum oxide layer; and the cold head is located in the first vacuum shield cover; and the heat shield aluminum oxide layer is coated on a surface of at least one of the first vacuum shield cover or the second vacuum shield cover; the clamp assembly on the radiation shield plate is configured to fix the Josephson junction array chip; and the sensor group adjacent to the Josephson junction array chip is arranged on the radiation shield plate.