Negative-hydrogen-ion production from a nanoporous 12CaO $\cdot$ 7Al2O3 (C12A7) electride surface

Abstract

A high production rate of negative hydrogen ion was observed from a nanoporous C12A7 electride surface immersed in hydrogen/deuterium low-pressure plasmas. The target was biased at 10-170 V negatively and the target surface was bombarded by H3 + ions from the plasma. The production rate was 1-2 orders higher than a clean molybdenum surface. The measured H-energy spectrum indicates that the major production mechanism is desorption by sputtering. This material has potential to be used as production surface of cesium-free negative ion sources for accelerators, heating beams in nuclear fusion, and surface modification for industrial applications.

References in corpus (2)

• Alternative solutions to caesium in negative-ion sources: a study of negative-ion surface production on diamond in H 2 /D 2 plasmas
• Reconstruction of energy and angle distribution function of surface-emitted negative ions in hydrogen plasmas using mass spectrometry

Cited by in corpus (4)

• Enhancing surface production of negative ions using nitrogen doped diamond in a deuterium plasma
• Pulsed DC bias for the study of negative-ion production on surfaces of insulating materials in low pressure hydrogen plasmas
• Surface production of negative ions from pulse-biased nitrogen doped diamond within a low-pressure deuterium plasma
• Influence of surface materials on the volume production of negative ions in a radio-frequency driven hydrogen plasma