The development of circuit models for ZR

Summary from only given. The capabilities of the Z accelerator will be significantly enhanced by the Z Refurbishment (ZR) project (McDaniel DH, 2002). The performance of a single ZR module is currently being characterized in the pre-production engineering evaluation test bed, Z20 (Lehr, JM, 2003). Z20 is thoroughly diagnosed so that electrical performance of the module can be established. Circuit models of Z20 have been developed and validated in both Screamer (1985) and Bertha (1989) circuit codes. For the purposes of predicting ZR performance, a full ZR circuit model has also been developed in Bertha. The full ZR model (using operating parameters demonstrated on Z20) indicates that the required 26 MA, 100 ns implosion time, output load current pulse will be achieved on ZR. In this paper, the electrical characterization of Z20 and development of the single module circuit models will be discussed in detail. The full ZR model will also be discussed and the results of several system studies conducted to predict ZR performance will be presented.