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

Session

S2: Chairperson - Gwenael Fubiani, U. Toulouse/CNRS

Sep 22, 2026, 10:25 AM

Conference Room (Prestige Lakeside Resort Nelson)

92. Theoretical Vibrational-excitation Cross Sections for PIC Based Negative Ion Plasma Computations

Vincenzo Laporta (Istituto per la Scienza e Tecnologia dei Plasmi - CNR)

9/22/26, 10:25 AM

Invited

Accurate state-resolved electron-molecule cross sections are essential for the quantitative description of low-temperature plasmas, negative ion sources, and neutral and charged particle beam systems. In particular, vibrational excitation processes induced by electron impact play a crucial role in determining molecular energy distributions, dissociative attachment rates, and the production...

153. Metastability of H$^-$ and O$^-$ Negative Ions at the Nanosecond Timescale

Guillermo G. Hinojosa Aguirre (Universidad Nacional Autonoma de Mexico)

9/22/26, 10:50 AM

Invited

Electron autodetachment of negative ions is a known phenomenon at the picosecond and shorter time scales. Examples are shape or Feshbach resonances observed in electron scattering. However, experimenters have observed autodetaching phenomena in longer time scales. These observations have not been independently confirmed because of the
difficulty of isolating negative ions and, because...

150. Caesium Free Negative Ion Beam Developments using Microwave Heating of Low-Work Function Materials

Dr Akihiro Matsubara (PESCO Co., Ltd)

9/22/26, 11:15 AM

Invited

Caesium-free negative ion sources have been actively studied to reduce vacuum contamination and improve maintainability. Such demands are increasing beyond neutral beam injection systems, including accelerator mass spectrometry (AMS). In AMS, 2 m × 2 m scale $^{14}$C systems for wider use are being developed $^{1)}$, increasing interest in safer caesium-free operation compared with...

75. Fulcher-Alpha Spectra and Laser Photodetachment Measurements and Models at SNU $H^-$ Source

Jeong-jeung Dang (Korea Institute of Energy Technology (KENTECH))

9/22/26, 11:40 AM

Invited

To improve the performance of volume production-based negative hydrogen ion sources, it is crucial to understand the negative ion volume production reactions by vibrationally excited molecules and cold electrons. This requires a thorough understanding of electron kinetics within the plasma, the generation and relaxation processes of vibrationally-excited molecules, and the transport of neutral...

53. Impact of plasma potential modifications on the performance of ITER-relevant negative hydrogen ion sources

Dirk Wünderlich (Max-Planck-Institut für Plasmaphysik (IPP))

9/22/26, 12:05 PM

Invited

The test facilities BATMAN Upgrade with a $1/8$ ITER-size ion source ($0.3\times0.6\,\mathrm{m}^2$) and ELISE with a half ITER-size ($1\times1\,\mathrm{m}^2$) source are essential parts of the European Roadmap towards the ITER NBI system (size of the ion source $1\times2\,\mathrm{m}^2$). These sources rely on the production of negative ions on caesiated low-work function surfaces. The ion...