RF cavity design automation for the APT CCDTL and CCL

As part of the APT project, the coupled-cavity drift tube linac (CCDTL) and coupled-cavity linac (CCL) designs are being developed. These structures contain 341 cavity segments in 11 different modules. This configuration accelerates a proton beam from 6.7 MeV to 211 MeV. Because of the number of individualized cavity arrangements, an automation design process is being developed. This paper discusses the methods of design automation using Pro-Engineer(R) as well as programs required to feed the Pro-Engineer(R) drawing generation process. Such programs include SUPERFISH, where cavity parameters are obtained, as well as programmed analytical methods used to define cavity dimensions that produce the desired level of coupling and /spl pi//2 mode frequency. To compute the coupling, a method developed by J. Gao has been used.