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- W4243362038 abstract "Publisher SummaryThe response of an evacuated chamber to sources and sinks of gas is properly analyzed by the pumping equation. Many factors contribute to this degradation, including the falloff of performance of the mechanical pump as its blankoff pressure is approached, the vapor pressure of the mechanical pump oil, and the normal outgassing of the system itself. It is found that upon crossover to the high vacuum pumps, the time constant of the system is decreased in proportion to the ratio of the speed of the high vacuum pump to the speed of the mechanical pump. Bubble detection may be used when the chamber under test has a gross leak and can be pressurized. The suspected regions can then be squirted with a weak soap or detergent solution and inspected for bubble formation. Bombing is a technique for testing hermetic enclosures, such as transistors, diodes, and integrated circuits, by subjecting the enclosure to helium at an elevated pressure and then testing the item in the vacuum chamber of a helium mass spectrometer leak detector for the reemission of the bombed helium. It is found that the response of a leak detector to flooding a leak with the probe gas is limited by the response time." @default.
- W4243362038 created "2022-05-12" @default.
- W4243362038 date "1980-01-01" @default.
- W4243362038 modified "2023-09-27" @default.
- W4243362038 title "15. The Fine Art of Leak Detection and Repair" @default.
- W4243362038 doi "https://doi.org/10.1016/s0076-695x(08)60384-1" @default.
- W4243362038 hasPublicationYear "1980" @default.
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