||We present the current status of our
Rare Isotope Accelerator (RIA) cryomodule development effort. The
RIA driver and post accelerator linac drift tube sections require about
forty reliable, low heat leak cryomodules, each containing from seven
to nine drift-tube-loaded cavities. A proposed triple spoke
option for RIA would increase this count to about seventy. We
have developed a cryomodule featuring separated cavity and insulating
vacuum spaces suitable for all classes of drift-tube-loaded cavities
used in RIA. Issues include ease of assembly, cavity cleanliness,
heat leak, and subsystem interface (cryogenics, couplers, tuners,
shields). We employ an innovative warm-to-cold beam line
transition to reduce module-to-module dead space while preserving a top
loading box design that minimizes the size of the cleanroom assembly.
An AIP-funded upgrade to the existing ATLAS heavy ion linac will
allow us to gain valuable operating experience by qualifying the
prototype cryomodule in a real machine.