Articles you may be interested inInvestigations of a method for determining pumping speed and sorption capacity of nonevaporable getters based on in situ calibrated throughput J. Vac. Sci. Technol. A 29, 051602 (2011); 10.1116/1.3626535 Divacancies and the hydrogenation of Mg-Ti films with short range chemical order Appl. Phys. Lett. 96, 121902 (2010); 10.1063/1.3368698 Efficient combining of ion pumps and getter-palladium thin films Problems of determining true equilibrium pressures of hydrogen getters over a wide range of getter temperature and hydrogen sorptionDue to the spreading use of hydrogen isotopes in many advanced fields of physics such as nuclear fusion, there is an increasing interest in devices able to sorb, store, and release these gases safely and controllably. In some cases there is also the requirement to purify the gas during the same adsorption-desorption process. A way to obtain this is to use a nonevaporable getter, which is able to sorb H2 isotopes reversibly and permanently sorb active gases, combined with a chemical compressor material (usually U). The present investigation refers particularly to a combination of getter materials with chemical compressors based on La-Ni-AI and Zr-Fe-V alloys. The nonevaporable getter sorbs H2 isotopes in the temperature range of 20-400 ·C, at low pressures, and in a second stage, on heating, releases these gases at higher pressures allowing sorption by the chemical compressor at room temperature. Subsequent heating (200-400 ·C) of the compressor provides a hydrogen isotope source at a substantially constant pressure of around 1 atm. The characteristics of these compressor alloys in terms of isotope equilibrium pressure, physicalchemical properties, and their use at defined pressures and temperatures are discussed, together with anticipated practical operation modes.
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