摘要:
A cooling device, comprising a pulse tube refrigerating machine (A) having a pressure source (1), a regenerator (6), a condenser (7), a pulse tube (9), a radiator (10), and a phase regulator (12) and a low temperature container having a liquid reservoir (21) fixed to a vacuum tank (31) through insulatingly supporting materials (36, 37), wherein the condenser (7) is fixed to the low temperature end (6b) of the regenerator (6) and disposed in the gaseous phase part (21a) of the liquid reservoir (21), the high temperature side of the pulse tube (9) is fixed to the vacuum tank (31) and disposed in the liquid phase part (21b) of the liquid reservoir (21) so that the low temperature end (9b) thereof is positioned on the lower side, the low temperature end (9b) of the pulse tube (9) is installed in the vacuum tank (31) on the outside of the liquid reservoir (21), and the low temperature end (9b) of the pulse tube (9) communicates with the condenser (7) through a tube (8).
摘要:
An improved dewar design that accelerates the manufacturing process of a dewar. In a preferred embodiment, the dewar includes an evacution port that may be larger in size by a factor of ten over the size of evacuation ports of conventional dewars. The oversized evacuation port, however, does not result in an increase in the overall size or profile of the dewar. The dewar is evacuated and hermetically sealed using an re-usable evacuation tool.
摘要:
An improved dewar design that accelerates the manufacturing process of a dewar. In a preferred embodiment, the dewar includes an evacution port that may be larger in size by a factor of ten over the size of evacuation ports of conventional dewars. The oversized evacuation port, however, does not result in an increase in the overall size or profile of the dewar. The dewar is evacuated and hermetically sealed using an re-usable evacuation tool.
摘要:
A shipping container (1) with an outer shipping container shell (3) and a support assembly for holding a dewar vessel (2) within the outer shipping container shell and providing impact and vibration resistance to the dewar vessel (3). The dewar vessel (3) has an inner vessel (13) that holds a specimen chamber (70) and plastic foam (30) between its inner wall and the specimen chamber. The specimen chamber (70) allows liquid cryogen to pass through it into the plastic foam (30), allows liquid cryogen in a vapor phase liquid state to pass from the plastic foam (30) into it, and acts as a filter to prevent particles or fragments of the plastic foam form from entering into it.
摘要:
A method wherein refrigeration is generated, preferably using a pulse tube cryocooler (100) or refrigerator, to produce cold working gas which is used to liquefy coupling fluid circulating (24, 18) between a coupling fluid liquid reservoir (21) and a refrigeration load (26), such as superconductivity equipment, using thermo-siphon effects to provide refrigeration to the refrigeration load.
摘要:
A microelectronic system (20) includes a substrate (22) that is preferably silicon and a microelectronic device (24) supported on the substrate (22). The microelectronic device (24) may be a light sensor that include a readout integrated circuit formed in the silicon substrate (22), and a light detector (28) supported on and electrically interconnected with the readout integrated circuit (26). A cryocooler (30) formed in and integral with the substrate (22) includes a gas inflow channel (36) formed in the substrate (22), an expansion nozzle (42) formed in the substrate (22) and receiving a gas flow from the gas inflow channel (36), and a gas outflow channel (48) that receives the gas flow from the outlet of the expansion nozzle (42). The gas inflow channel (36) and the gas outflow channel (48) may be countercurrent spirals.
摘要:
The invention relates to an instant tripping device for short circuits in electrical DC and AC networks of surface and underwater vessels, especially combat vessels, and offshore installations. The aim of the invention is to improve a device of this type in such a way as to reduce the effects of thermal and dynamic stresses, due to physical factors, that occur during short circuits as far as possible and to increase availability and manoeuvrability. To this end, the instant tripping device has at least one high-temperature superconducting current limiter (3).
摘要:
The invention relates to a cryostat for electrical devices such as superconducting current limiters and electrical machines such as transformers, motors, generators and electrical magnets with a superconducting winding. A refrigerant at a low, especially cryogenic temperature, especially of 77K, forms a cryobath (3) for superconducting current limiters and/or superconducting windings in the inner compartment of said cryostat, which has current lead-throughs (5) enabling a current to be conducted from a high-temperature, e.g. room temperature, level to a lower temperature, especially a cryogenic temperature, e.g. 77K, and vice versa. The aim of the invention is to reduce or avoid the unwanted input of heat into the cryostat and to design a refrigerator or a cold-generating installation of the cryostat with a lower capacity. To this end, a heat exchanger device (13) is allocated to a current lead-through, preferably each current lead-through (5) of the cryostat. Said heat exchanger device provides a means of reducing the input of heat energy from the environment into the inner compartment of the cryostat through the respective current lead-through (5).
摘要:
A cryogenic storage device (10) is disclosed having a tank (12) with an open top (14) and a wall which defines an interior chamber adapted to receive biological specimens. A fluid reservoir is disposed around at least a portion of the wall on an outer surface of the wall and this fluid reservoir receives a liquefied gaseous material, such as liquid nitrogen. The source (32) of the liquid gaseous material is fluidly connected through a valve (34) to the reservoir to maintain the level of the liquefied gaseous material between preset limits in the reservoir thus cooling the interior of the interior chamber and any biological specimens contained within the interior of the chamber.
摘要:
A method is disclosed for improving the vacuum inside glass liners for vacuum bottles, according to which, in a space (1), between the double walls (2 and 2') of the glass liner (3), and after its silvering and drying, one or more "getters" (4) are introduced into it through a tubette (5). When the pumping out of the air is done from below and the tubette (5) is positioned on the lower central portion of the liner, a part (6) is introduced into the tubette which lodges itself in the lower opening (7) of the outer wall (2). This forms a barrier or filter which prevents the "getters" (4) from escaping from the space (1). The part (6) is equipped with openings (6A), as well as lower (6B) and upper (6C) grips, working as springs. Part (6) is not necessary if the pumping operation is done from below and the tubette (5) is positioned on the lower side portion or on the upper portion of the liner, or if the pumping operation is done from above or from the side, or in addition, if the "getter" itself has physical, chemical or mechanical elements which cause it to expand to larger dimensions than the internal diameter of the tubette (5). Furthermore, the part (6) is not necessary if, after having introduced the "getter" through the tubette, the latter's diameter is narrowed by means of the softening of the glass and its stretching.