The Neutral Beam Injection System on ITER is based on the acceleration of negative Hydrogen/Deuterium ions, being extracted from a radio frequency (RF) driven ion source at 1 MHz. Since IPP Garching is already operating positive ion RF sources on ASDEX Upgrade very reliably for more than 20 years, the group is strongly involved in the development of the RF source and the extraction system for ITER. This work is performed on two test facilities, BATMAN, equipped with a prototype RF source (1/8 of ITER size) and ELISE (1/2 of ITER ITER size).
The talk will highlight some of the major technical challenges and experiences gained on the way to increase the source size and the long pulse operation (up to 1 h), like the suppression of co-extracted electrons. A brief outlook to the next steps will also be presented
About the speakers
Bernd Heinemann received his Diploma degree in mechanical engineering from the Technical University of Munich, Germany, in 1985. He joined the Max-Planck-Institute For Plasmaphysics (IPP), Garching, Germany, in 1986. He is currently the group leader of the Neutral Beam Group at IPP, which is responsible for the NBI systems of ASDEX-Upgrade and Wendelstein 7-X and is involved in the development of the radio frequency ion source for ITER.