The influence of virtual leaks on the pressure in high and ultra-high vacuum systems

✍ Scribed by D Edwards Jr

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 258 KB
• Volume: 29
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(79)80748-4

✦ Synopsis

It is found that the least upper bound to the pressure in a vacuum system with a virtual leak is Qo/(etoS), Where Qo (torr. I) is the quantity of gas trapped at t = O, e = 2.718, to(S) is the time from the start of the pumpdown and S (I/s) is the real pumping speed.