Speaker
Description
SEISM is a compact ECR ion source operating at 60
GHz developed up to 2014. The prototype uses a
magnetic cusp to confine the plasma. This simple
magnetic geometry was chosen to allow the use of
polyhelix coils (developed at the LNCMI, Grenoble) to
generate a strong magnetic confinement featuring a
closed ECR surface at 2.1 T. The plasma is sustained
by a 300 kW microwave pulse of 1 ms duration and
with a 2 Hz repetition rate. Previous experiments at
LNCMI have successfully demonstrated the
establishment of the nominal magnetic field and the
extraction of ion beams with a current density up to
~ 1A/cm2. The presence of "afterglow" peaks was
also observed, proving the existence of ion
confinement in a cusp ECR ion source. The last run
was prematurely stopped but the project restarted in
2018 and new experiments are planned in 2021. A
new transport beam line has been designed to
improve ion beam transport towards the beam
detectors. Short- and long-term research plans are
presented, including numerical simulations of the
beam transport line and future upgrades of the ion
source with the main goal to transform the high
current density measured into a real high intensity
ion beam.