title: Angular distributions of surface produced H(-) ions for reflection and desorption processes.
abstract: A numerical simulation code, Atomic Collision in Amorphous Target, has been run to clarify the effects due to the incident angle of hydrogen flux onto surface collision cascade in the subsurface region of a Cs covered Mo plasma grid. The code has taken into account the threshold energy for negative hydrogen (H(-)) ions to leave the surface. This modification has caused the shift of energy distribution functions of H(-) from that of hydrogen atoms leaving the surface. The results have shown that large incident angle of hydrogen particle tilt the angular distribution of reflection component, while it caused a small effect onto the angular distribution of desorption component. The reflection coefficient has increased, while the desorption yield has decreased for increased angle of incidence measured from the surface normal.
authors.affiliation: Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Wada
authors.affiliation: Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kasuya
authors.affiliation: Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kenmotsu
authors.affiliation: Organization for Research Initiatives and Development, Doshisha University, Kamigyoku, Kyoto 602-8580, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Sasao
mesh_terms: D002586:Cesium / Q000737:chemistry; D006859:Hydrogen / Q000737:chemistry*; D008962:Models, Theoretical; D058626:Plasma Gases / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D058626:Plasma Gases; D002586:Cesium; D006859:Hydrogen