Contributo in volume, 2023, ENG, 10.1007/978-3-031-21476

Advanced Models for Negative Ion Production in Hydrogen Ion Sources

Celiberto R.; Capitelli M.; Laricchiuta A.; Pietanza L.D.; Colonna G.

CNR ISTP - Istituto per la Scienza e Tecnologia dei Plasmi, Sede di Bari, Italy.

An advanced chemical model, based on the state-to-state approach, is applied to the modeling of a multicusp negative ion source. Simulations are performed with the GPKin kinetic code that solves the Boltzmann equation for free electrons self-consistently coupled with the Master Equations, following the evolution of the non-equilibrium electron energy distribution function (EEDF) and the vibrational kinetics of the ground and excited singlet electronic states of the H2 molecule. The virtual experiments reproduce the conditions of an experiment in the literature, showing the predictive character of the present approach and validating the model. The sensitivity of the results to the selected database of cross-sections for the electron impact-induced processes is investigated, clarifying the impact of more accurate datasets for specific processes in the mechanisms of negative ion production.

Keywords

H2 cross-section database, Self-consistent kinetics, Vibrational kinetics, Non-equilibrium EEDF, Metastable state

CNR authors

Capitelli Mario, Celiberto Roberto, Colonna Gianpiero, Laricchiuta Annarita, Pietanza Lucia Daniela

CNR institutes

ISTP – Istituto per la Scienza e Tecnologia dei Plasmi

ID: 481458

Year: 2023

Type: Contributo in volume

Creation: 2023-05-15 10:52:06.000

Last update: 2024-01-11 16:36:08.000

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:481458

DOI: 10.1007/978-3-031-21476

Google Scholar: bBodYmMAAAAJ:yD5IFk8b50cC

Scopus: 2-s2.0-85180515463