Research on Helium Mass-spectrometer Back Pressure Leak Detection Purification Craft for the Specimen with Epoxy Resin

摘要

The purification effect of the blow wash method, low thermal air blow wash method, vacuum method and alcohol cleaning + blow wash method for helium mass-spectrometer back pressure leak detection were researched and compared. It is found that these four purification craft will not accelerate the helium loss in the specimen. To the specimen with epoxy resin, if the maximum dwell time is short, the low thermal air blow wash method or alcohol cleaning + blow wash method will be befitting, and if the maximum dwell time is enough, the vacuum method can be the best choice.