Publication Date:
2014
abstract:
The neutral beam test facility ELISE (Extraction from a Large Ion Source Exper
iment), located
at the Max
-
Planck
-
Institut für Plasmaphysik (IPP) in Garching, is operational since beginning of
2013. ELISE, equipped with a large RF driven ion source (1x0.9 m
2
with an extraction area of
0.1 m
2
) of half the size of the ion source for the
ITER neutral beam injection (NBI) system, is an
important step in the European R&D roadmap for the construction of the neutral beam heating
systems, defined by the ITER domestic agency F4E. The early experience of the operation of
such a large RF driven s
ource will give an important input for the design of the Neutral Beam
Test Facility PRIMA in Padova and the ITER NBI systems and for their commissioning and
operating phases.
The paper summarizes the results
of
ELISE operation in the last two years, both
for hydrogen
and in deuterium, for the different experimental programs: (1) low RF power operation without
and with Cs, (2) short pulse, high RF power operation, and finally (3) long pulse, high RF power
operation. It discusses critical issues like Cs con
ditioning and long pulse stability, and the
dependence of the source and beam performance on operational parameters.
Iris type:
04.02 Abstract in Atti di convegno
List of contributors: