R&D status of the annuler coupled structure linac for the JAERI/KEK joint project

Ao, Hiroyuki; Hayashizaki, Noriyosu*; Paramonov, V.*

Annular Coupled Structure (ACS) has been developed for the 190-400MeV coupled-cavity linac of the JAERI/KEK joint project. Design optimization of the ACS cavity has nearly been completed using 2D and 3D codes. In parallel with the numerical analyses, half-scale aluminum models were fabricated to confirm the numerical results. The cold-model tests also aim to finish the detailed design taking mass production procedures into account. Especially, the machining and the tuning procedures are examined in detail from the viewpoint of cost reduction and quality management. The results of the model tests are presented with those of other recent R&D works on ACS, which include fabrication R&D performed with full-scale models.