Skip to Main content Skip to Navigation
Journal articles

Negative-ion surface production in hydrogen plasmas: Determination of the negative-ion energy and angle distribution function using mass spectrometry

Abstract : 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.
Document type :
Journal articles
Complete list of metadatas

Cited literature [56 references]  Display  Hide  Download

https://hal-amu.archives-ouvertes.fr/hal-02375768
Contributor : Gilles Cartry <>
Submitted on : Friday, November 22, 2019 - 10:49:41 AM
Last modification on : Tuesday, November 26, 2019 - 6:11:26 PM

File

Dubois et al_2016_Modelling NI...
Files produced by the author(s)

Identifiers

Collections

Citation

J. Dubois, K. Achkasov, D. Kogut, A. Ahmad, J. Layet, et al.. Negative-ion surface production in hydrogen plasmas: Determination of the negative-ion energy and angle distribution function using mass spectrometry. Journal of Applied Physics, American Institute of Physics, 2016, 119 (19), pp.193301. ⟨10.1063/1.4948949⟩. ⟨hal-02375768⟩

Share

Metrics

Record views

80

Files downloads

130