摘要:
Methods and systems are disclosed for saving energy while a superconducting magnet system is not being used and for reducing the time required for the re-establishment of the operating conditions of the system. Traditionally, during an inactive time interval, the temperature of the magnet coils is not allowed to rise, and the system is kept ON, in operating conditions. This results in wasting a large amount of energy for keeping the magnet coils at cryogenic temperatures. Turning the system OFF has never been an option since re-establishment of the operating conditions is very time consuming and costly. The present disclosure offers methods and systems that allow idling of a system in temperatures higher than the magnet coils' intended operating temperature, which results in noticeable savings.
摘要:
A number of electronic modules 82, 82', 83, 83' are mounted on a cold finger 100 disposed within a sealed housing 104, 110, the interior 210 of which is evacuated. To minimise heat transfer by conduction, gaps are provided in the dielectric substrates carrying the input and output transmission lines providing signal paths between the modules and electrical connectors on the exterior sidewalls 106, 108 of the housing. The gaps are bridged by thin conductive wires, thereby providing low electrical, but high thermal, impedance at the gaps. A number of module assemblies may be stacked on a single cold finger. To allow modules to be adjusted under actual operating conditions, a cover having a number of spring-loaded screwdrivers extending through vacuum tight seals and aligned with adjustable components of the modules, may be temporarily substituted for the enclosure lid 110. The springs urge the screwdrivers out of engagement when no adjustment is being made to minimise heat transfer.
摘要:
Integrated circuit packaging assembly (10) in which a plurality of electrical pins (46) of an integrated circuit package (40, 42) is removably mounted to a corresponding plurality of mating pins (50) each having a receptacle (52) filled with liquid mercury (60), and the temperature is reduced such that the liquid mercury (60) solidifies thereby firmly bonding the electrical pins (46 and 50) together. The mating pins (50) are mounted inside a Dewar type vessel (12) and the assembly is covered with a low temperature liquified gas (20) for the dual purpose of solidifying the liquid mercury (60) and cooling the integrated circuit package (40, 42).
摘要:
A system provides convective transfer from a workpiece (10) to a flowing fluid. A gap (16) is formed between the workpiece (10) and a facesheet (12) containing fluid supply nozzles (18) and fluid return nozzles (20). The fluid is fed to the supply nozzles (18), travels a short distance within the gap (16) adjacent to the facesheet (12), and exits via return nozzles (20). The flow cross section and flow density facilitate heat transfer at a moderate flow rate and low fluid pressure. The system is also applicable for chemical transfer such as plating or etching printed circuit boards and for transfer through a semi-permeable membrane.
摘要:
A liquid cooling type high frequency solid state device arrangement comprising: a solid state chip (8); at least one matching circuit (6) connected to the solid state chip (8); a carrier (7) for mounting the solid state chip (8) and the matching circuit (6), constituting a solid state device (24) to be cooled; a coolant vessel (1) for containing a liquid coolant (2), a space for coolant vapor remaining at the top thereof; and a means for condensing the coolant vapor contained in the top space of the vessel (1). At least a part of the solid state device (24) contacts the liquid coolant (2) for boiling and evaporating the coolant. The arrangement is such as to prevent amplitude modulation of the solid state device (24) due to the boiling of the coolant (2).
摘要:
L'agencement pour composant électronique à refroidir lors de son fonctionnement, ledit agencement comporte un support (1) destiné à recevoir le composant électronique (16), une embase (2) configurée de sorte à être refroidie, et un élément de liaison (3) reliant mécaniquement et thermiquement l'embase (2) au support (1) de sorte à le refroidir. L'élément de liaison (3) est configuré de sorte que le support (1) soit mobile par rapport à l'embase (2), et l'agencement comporte un système d'ajustement de déplacement (4) configuré de sorte à appliquer un mouvement audit support (1) par rapport à l'embase.