Negative-ion surface production in hydrogen plasmas: Determination of the negative-ion energy and angle distribution function using mass spectrometry
| العنوان: | Negative-ion surface production in hydrogen plasmas: Determination of the negative-ion energy and angle distribution function using mass spectrometry |
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| المؤلفون: | J. Dubois, K. Achkasov, Jean Marc Layet, Ahmad Hassan Ahmad, G. Cartry, D. Kogut, Alain Simonin |
| المساهمون: | Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| المصدر: | Journal of Applied Physics Journal of Applied Physics, American Institute of Physics, 2016, 119 (19), pp.193301. ⟨10.1063/1.4948949⟩ Journal of Applied Physics, 2016, 119 (19), pp.193301. ⟨10.1063/1.4948949⟩ |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | 010302 applied physics, Work (thermodynamics), Materials science, Hydrogen, FOS: Physical sciences, General Physics and Astronomy, chemistry.chemical_element, Plasma, Mass spectrometry, 01 natural sciences, Physics - Plasma Physics, 010305 fluids & plasmas, Ion, Plasma Physics (physics.plasm-ph), Distribution function, chemistry, Physics::Plasma Physics, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], 0103 physical sciences, Acceptance angle, Graphite, Atomic physics |
| الوصف: | International audience; This work focuses on the understanding of the production mechanism of negative-ions on surface in low pressure plasmas of H2/D2. The negative ions are produced on a HOPG sample (Highly Oriented Pyrolitic Graphite) negatively biased with respect to plasma potential. The negative ions created under the positive ion bombardment are accelerated towards the plasma, self-extracted and detected according to their energy and mass by a mass spectrometer placed in front of the sample. The shape of the measured Negative-Ion Energy Distribution Function (NIEDF) strongly differs from the NIEDF of the ions emitted by the sample because of the limited acceptance angle of the mass spectrometer. To get information on the production mechanisms, we propose a method to obtain the distribution functions in energy and angle (NIEADFs) of the negative-ions emitted by the sample. It is based on an a priori determination of the NIEADF and on an a posteriori validation of the choice by comparison of the modelled and experimental NIEDFs. |
| تدمد: | 0021-8979 1089-7550 |
| DOI: | 10.1063/1.4948949 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4692e1d0a905cfefcaabd4d6478cf49Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c4692e1d0a905cfefcaabd4d6478cf49 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00218979 10897550 |
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| DOI: | 10.1063/1.4948949 |