The laboratory also operates a smaller vacuum chamber that is 3 m long and 1 m in diameter, which is attached to the Large Vacuum Test Facility (LVTF) via a 60-cm-diameter gate valve. The facility is referred to as the "Foster chamber" in the lab because it was first used by Ph.D. grad John Foster for his dissertation work.  In the photographs below, the Foster chamber is shown at the bottom left as an extension to the LVTF.  This vessel can be evacuated independently of the main chamber and serves as a test cell for conducting fundamental studies on plasma-electrode interactions (e.g., Stark broadening electric field measurements). This chamber can maintain a pressure of 35 mTorr.