Abstract
Improvements are made of a Monte Carlo neutral transport code for the analysis of negative ion sources. These improvements make it possible to calculate the density of excited atoms, and to compare the numerical results with spectroscopic measurements, such as the Hα Balmer spectrum (n=3→n=2, n: principle number). The line-integrated intensities of the Hα spectrum in a tandem-type negative ion source are investigated. The excited hydrogen atoms in the n=3 level are populated by excitation, mutual neutralization (H−+H+→H(n)+H), and dissociation of H2, etc. The simulation results show that mutual neutralization greatly contributes to the intensity of the Hα spectrum, especially in the extraction region. In addition, near the filament in the driver region, the excitation process due to the fast electrons greatly contributes to the intensity of the Hα spectrum.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
