Speaker
Description
Oven are widely used to produce metallic ion beams
in ECRIS. A calcium oven dedicated to metal
evaporation up to 650°C has been investigated by
simulation and experience. The differential atom
emittance has been measured and is well reproduced
by the results of a Monte-Carlo simulation code. The
absolute atom flux was measured as a function of the
oven temperature and compared with theoretical
predictions. A quite good agreement is obtained with
theory and new values of Antoine's coefficient for
calcium are proposed. The simulation is used to
investigate the probability of on flight atom ionization
by the plasma as a function of the oven distance to
the ECR zone. With the PHOENIX V3 geometry, when
the oven is placed in the injection biased disk plane,
the ionization efficiency is 14%. This value in quite
good agreement with experiment. Theoretical
efficiency up to 57% is reachable when the oven
distance is reduced to 1 cm to the ECR zone.