ABSTRACT
In approaching a vacuum system the user needs to be aware of how its various parts — the chamber with its access port and door, pumps, valves, pipes, gauges, etc. — are connected in a way that seals the vacuum in the system from the atmosphere outside. Also, and especially if contemplating the design of items to be used in vacuum (such as a sample holder, for example), the user should be aware of the limitations imposed on the choice of materials that can be used.
