Laser assisted electron impact excitation of helium in the threshold region

28th International Conference on Photonic, Electronic and Atomic Collisions

Weyland, Marvin^1 ; Ren, Xue Guang^1 ; Pflüger, Thomas^1 ; Baek, Woon Yoon^1 ; Rabus, Hans^1 ; Ullrich, Joachim^1 ; Terao-Dunseath, Mariko^3 ; Dunseath, Kevin M.^3 ; Dorn, Alexander^2

Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig

38116, Germany^1

Max Planck Institute for Nuclear Physics, Heidelberg

69117, Germany^2

Institut de Physique de Rennes, UMR 6251 CNRS, Universite de Rennes 1, Rennes Cedex

35042, France^3

关键词: Electron-impact excitation;    Fully differential;    Intense laser radiation;    Nd:YAG laser beams;    Pulsed electron beams;    Reaction microscopes;    Single frequency;    Threshold regions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/11/112002/pdf
DOI  :  10.1088/1742-6596/488/11/112002

来源: IOP

【 摘 要 】

We study the threshold excitation of metastable He∗(1s2s1,3S) states by combined electron impact and intense laser radiation (λ 532 nm/1064 nm, I 1010-1012W/cm2). A new experimental setup is used combining a ns-pulsed electron beam extracted from a photo-cathode, a single frequency Nd:YAG laser beam and a reaction microscope. Fully differential scattering cross sections are obtained by measuring the recoil momentum of the metastables.