The Experimental Test Accelerator (ETA) II

The Experimental Test Accelerator (ETA) is designed to produce a 10 kAmp electron beam at an energy of 4.5 MeV in 40 nsec pulses at an average rate of 2 pps. The accelerator also operates in bursts of 5 pulses spaced by as little as one millisec at an average rate of 5 pps. The machine is currently operating near 80% of its design values and has accumulated over 2.5 million pulses--mostly at a rate of one pps. Our previous paper described the ETA injector and its associated pulse power system. This paper discusses the plasma cathode electron source, the remainder of the accelerator, and the operating characteristics of the machine.