Specifications for the CAD design of the MITICA grids

In the framework of the activities aimed at develop ing and optimizing the Heating and Current Drive Ne utral Beam Injectors (H&CD NBIs) for ITER [1][2], the SPI DER and MITICA experiments are planned to be built at Consorzio RFX in the PRIMA facility. The purpose of MITICA is to demonstrate that all th e operational parameters of the ITER HNB accelerato r can be experimentally achieved with reasonable marg in, thus establishing a large step forward in the performances of neutral beam injectors in compariso n with the present experimental devices. The accelerator represent one of the most critical parts of the MITICA experiment, because it is reque sted to have an optimal performance in terms of optics whil e being subjected to high heat loads and high volta ge conditions. Moreover, the efficiency of the whole i njectors is largely influenced by the performance o f the accelerator. This report gives the specifications and methods th at have been followed during the design of the MITI CA grids, in order to satisfy all the requirements and to have a simple and repeatable design process.