CALIFORNIA INSTITUTE OF TECHNOLOGY
This ARRA award supplement is to update the infrastructure in the Bellan Plasma Group lab. Old infrastructure is prone to breakdowns and limits performance of experiments. For example, the 12 gate valve on the large vacuum chamber that is used in all ongoing experiments was built 25 years ago, is no longer supported by the manufacturer, and leaks or sticks from time to time requiring days of ad hoc troubleshooting to achieve good vacuum. As another example, the spot welder used for making elect
rostatic probes and filaments for fast ion gauges dates from the 1960 s or earlier and is unreliable.