10th International Symposium on Negative Ions, Beams and Sources - NIBS'26

Session

S1: Chairperson - Dirk Wunderlich, IPP-MPG

Sep 24, 2026, 8:10 AM

Conference Room (Prestige Lakeside Resort Nelson)

63. Negative Ion Source Developments at the ITER-NBTF in Padua towards the start of MITICA-HNB Operation

Diego Marcuzzi (Consorzio RFX)

9/24/26, 8:10 AM

Invited

The ITER Neutral Beam Injection Heating and Current Drive system consists of 2 (upgradable to 3) Heating Neutral Beams (HNB) and 1 Diagnostic Neutral Beam (DNB).
A HNB system capable of these parameters had never been designed nor tested, hence the ITER Neutral Beam Test Facility (NBTF) was set up at Consorzio RFX premises (Italy) aimed at developing the injector prototype.
The facility...

65. Stabilization of Long Beam Pulses at NNBI

Christian Wimmer (Max-Planck-Institut für Plasmaphysik (IPP))

9/24/26, 8:35 AM

Invited

The Neutral Beam Injection (NNBI) for ITER is based on large-scale RF plasma sources for negative hydrogen ions, which need to deliver high currents of H$^-$ and D$^-$ (up to 66 A) for up to one hour while maintaining the co-extracted current of electrons below the ion current. Cesium is used to enable the surface production of negative ions; however, the plasma-induced removal of Cs from the...

78. The DC voltage holding experiments in vacuum under cesium deposition condition

Dr Bo Liu (Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China)

9/24/26, 9:00 AM

Contributed Oral

Abstract: Cesium injection is an effective and relatively mature method to improve the negative ion yield of negative ion sources. Cesium deposition on the component surface of negative ion based neutral beam injector (NNBI) accelerators is one of the key factors affecting insulation performance. At present, the correlation between cesium deposition amount and inter-electrode insulation level...

94. Neutral Beam Injectors for ITER, Progress of Design and Manufacturing Activities

Carlo Poggi (ITER Organization)

9/24/26, 9:20 AM

Invited

The ITER tokamak will rely on negative ion–based Neutral Beam Injectors (NBIs) for auxiliary heating and current drive, as well as for high resolution spectroscopic diagnostics of burning plasmas. The heating system comprises two, with an option for a third, Neutral Beam Injectors capable of delivering 16.5 MW of MeV class neutral hydrogen or deuterium atoms, while a dedicated Diagnostic...