Pressure Effect on Space-Charge-Limited Current Transmitted across a Cylindrical Cavity

Experimental data on space-charge dissipation due to gas effects has been obtained using electron pulses from an accelerator injected directly through a thin film and a metal screen into a small experiment chamber. The current transmitted across the chamber was measured as a function of gas pressure, gas composition, chamber depth, and electron collector impedance. The measurements generally confirm the theory developed by dePlomb in a companion paper at this conference. Several problem areas are noted that require further investigation.