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

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.48 Nuclear engineering
• Thông tin xuất bản: Albuquerque, N.M. : Oak Ridge, Tenn. : Sandia National Laboratories. ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2010
• Mô tả vật lý: Size: 29 p. : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 256973
• Chủ đề: 1. 08 hydrogen; 2. 30 direct energy conversion; 3. Absorption; 4. Capacity; 5. Convection; 6. Degassing; 7. Et al; 8. Gases; 9. Getters; 10. Hydrogen; 11. Testing

Tóm tắt

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.