Leak testing of cryogenically pumped large-volume high-vacuum systems
Abstract
The problems that may occur in the cryogenically pumped large-volume high-vacuum chambers (LVHVCs), used for the environmental testing of aerospace components and systems, are examined. Consideration is given to the designs of the LVHVCs and the cryogenic pumps. In the procedure of leak testing with tracer gas, the success of testing depends on attaining the required test sensitivity with speed, economy, and reliability. The steps required to speed up the leak location phase of the leak testing procedure and to thoroughly clean every penetration (i.e., fitting or nozzle) of the system are discussed.
- Publication:
-
Materials Evaluation
- Pub Date:
- January 1988
- Bibcode:
- 1988MatEv..46...22S
- Keywords:
-
- Cryopumping;
- High Vacuum;
- Leakage;
- Vacuum Systems;
- Helium;
- Seals (Stoppers);
- Engineering (General)