Conveners
1st Session: Monday AM1
- Aleksander Ivanov (Budker Institute of nuclear physics)
The ITER neutral beam system will be equipped with large RF driven negative ion sources, with a cross section of 0.9 m x 1.9 m which have to deliver a D$^-$ current of 40 A accelerated to 1 MeV. The negative ions are produced by surface conversion of hydrogen atoms and ions on caesium layers. These giant sources will be tested from 2018 onwards at the neutral beam test facilities SPIDER and...
Long pulse beam accelerations with MeV-class hydrogen negative ions have been demonstrated by using Multi-Aperture and Multi-Grid (MAMuG) accelerators toward high power neutral beam injector (NBI) required in JT-60SA and ITER. This paper reports that pulse duration of the ITER-relevant current density of hydrogen negative ion beams at 1 MeV has been successfully extended from 0.4 s to 60 s by...
Since the signature of the ITER treaty in 2006, a new research programme targeting the emergence of a new generation of Neutral Beam (NB) systems for future fusion reactors has been underway at CEA, in collaboration with several academic laboratories in France and EPFL (Switzerland). To provide plasma heating and current drive, the NB system specifications are very demanding: a very high level...
