Getter-activated cryogenic thermal switch
WebNov 1, 2011 · Cryogenic gas-gap heat switches are rendered compact by using a sorption pump as actuating device. The sorption pump adsorbs gas when it is cooled and releases gas when it is heated. ... Getter-activated cryogenic thermal switch. Adv. Cryog. Eng., 31 (1986), p. 933. ... Low temperature adsorption versus pore size in activated carbons ... WebA cryogenic thermal switch has been designed, assembled, and tested over a range of temperatures. The switch has no moving parts and has a thermal resistance which can …
Getter-activated cryogenic thermal switch
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WebGETTER-ACTIVATED CRYOGENIC THERMAL SWITCH ABSTRACT D. J. Frank and T. C. Nast Research & Development Division Lockheed Missiles & Space Company, Inc. Palo Alto, California A cryogenic thermal switch has been designed, assembled, and … WebHydrogen gas-gap heat switches have been be effective, most of these NEG alloys need to be activated described for high temperature batteries [2,3], sorption cryocoolers that produce cryogenic refrigeration by closed- Table 1 Properties expected from a metal hydride actuator for a gas-gap heat cycle Joule–Thomson expansion process [1,4–6 ...
WebJun 1, 2012 · A getter that has a small heat capacity and low thermal conductance to the body of the switch requires low-activation power. The cooler benefits from this in two ways: shorter recycle times... WebSep 15, 2024 · A getter [ 21 ], sorbent hydride [ 22] or sorption pump [ 23] can be used as an activation mechanism to fill and evacuate the used gas. In the case of radiative TMEs, a piezoelectric motor can be used to control the distance between a thin layer of vanadium dioxide and two mediums of silicon dioxide, enabling the near-field effect [ 20 ]. Table 1.
WebA getter is a deposit of reactive material that is placed inside a vacuum system to complete and maintain the vacuum. When gas molecules strike the getter material, they combine with it chemically or by absorp tion. … WebThis cryogenic system will be used for cooling of the bolometric detectors and optics in the Polatron, a ground-based receiver for measurement of the polarisation of the cosmic microwave background radiation at a frequency of 90 GHz.
WebJun 1, 2024 · Two different configurations are considered: heating due to an internal or to an external heat source. The effect of using different gases was also studied. For the first configuration, the...
WebGetter-activated cryogenic thermal switch - NASA/ADS A cryogenic thermal switch has been designed, assembled, and tested over a range of temperatures. The switch has no … horse and hound new hampshireWebJul 1, 2014 · A previously designed cryogenic thermal heat switch for space applications has been optimized for low mass, high structural stability, and reliability. The heat switch … p touch embellishmentWebWe have designed, built, and tested a gas-gap heat switch that turns on and off passively, without the need for a separate, thermally activated getter. This switch uses 3He condensed as a thin film on alternating plates of copper. p touch embellish ribbon colorsWebThe switch is mounted to the ADR salt pill with the getter side in strongest thermal contact to the salt pill. A ruthenium oxide sensor was mounted on the ADR-side of the switch and second sensor was mounted on the \free" side. A heater was also mounted on the \free" side to allow a delta temperature to be imposed across the switch. p touch embellish ribbon brotherWebDec 1, 2024 · The following types of heat switch devices are discussed: 1) magnetic levitation suspension, 2) shape memory alloys, 3) differential thermal expansion, 4) helium or hydrogen gap-gap, 5)... p touch embellish tapeWebJan 17, 2002 · The SAES getter alloy St-707 with nominal weight composition 70% Zr–24.6% V–5.4% Fe is a mixture of α-Zr metal and the cubic C15 pseudobinary Zr (V 0.83 Fe 0.17) 2 intermetallic Laves phase [13] and has shown reversible hydrogen sorption at somewhat lower temperature [11], [12]. p touch embellish ribbonWebWhy We focus on Hydrogen getter with a cryogenic tank vacuum space To maintain good thermal insulation performance, the vacuum degree of the dissection is generally below … p touch elite