Speaker
Description
The plasma chamber and injection system design
play a fundamental role in ECRISs with the aim to
obtain an optimized electromagnetic field
configuration able to generate and sustain a plasma
with a high energy content. In this work we present
the numerical study and the design of an
unconventionally-shaped cavity resonator* that
possesses some key advantages with respect to the
standard cylindrical cavities, usually adopted in ion
sources setups. The cavity geometry, whose design
has been completed on January 2020, has been
inspired by the typical star-shaped ECR plasma,
determined by the magnetic field structure. The
chamber has been designed by using the commercial
softwares CST and COMSOL, with the aim to
maximize the on-axis electric field. Moreover, a
radically innovative microwaves injection system,
consisting in side-coupled slotted waveguides, has
been implemented, allowing a better power coupling
and a more symmetric power distribution inside the
cavity with respect to the standard rectangular
waveguides. This new 'plasma-shaped oriented'
design could relevantly improve the performances of
the ECRISs while making more compact the overall
setup.