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arXiv · 1911.11007

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

Mamiko Sasao·Roba Moussaoui·Dmitry Kogut·James Ellis·Gilles Cartry·Motoi Wada·Katsuyoshi Tsumori·Hideo Hosono
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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.

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Mamiko Sasao, Roba Moussaoui, Dmitry Kogut, James Ellis, Gilles Cartry, Motoi Wada, Katsuyoshi Tsumori, Hideo Hosono. 2019-11-25. Negative-hydrogen-ion production from a nanoporous 12CaO $\cdot$ 7Al2O3 (C12A7) electride surface. https://doi.org/10.7567/apex.11.066201

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