Hydrogen capacity and absorption rate of the SAES St707 non-evaporable getter at various temperatures.

Hsu, Irving ; Mills, Bernice E.

Sandia National Laboratories

关键词: 30 Direct Energy Conversion;    Vacuum Systems Nesdps Office Of Nuclear Energy Space And Defense Power Systems;    Getters;    Capacity;    08 Hydrogen;   

DOI  :  10.2172/993616
RP-ID  :  SAND2010-5402
RP-ID  :  AC04-94AL85000
RP-ID  :  993616

美国|英语

来源: UNT Digital Library

【 摘 要 】

A prototype of a tritium thermoelectric generator (TTG) is currently being developed at Sandia. In the TTG, a vacuum jacket reduces the amount of heat lost from the high temperature source via convection. However, outgassing presents challenges to maintaining a vacuum for many years. Getters are chemically active substances that scavenge residual gases in a vacuum system. In order to maintain the vacuum jacket at approximately 1.0 x 10{sup -4} torr for decades, nonevaporable getters that can operate from -55 C to 60 C are going to be used. This paper focuses on the hydrogen capacity and absorption rate of the St707{trademark} non-evaporable getter by SAES. Using a getter testing manifold, we have carried out experiments to test these characteristics of the getter over the temperature range of -77 C to 60 C. The results from this study can be used to size the getter appropriately.