Detection of Vibrationally Excited H2 (V) for H- Production.

摘要

Research was performed to develop laser-based detection of high-lying vibrational levels of Hydrogen to aid the development of high intensity H- ion production from H2 plasmas. A new type source of vibrationally excited H2 was developed, and a 2-photon resonantly enhanced multiphoton ionization (REMPI) was developed and was successful in detecting H2(v) in levels up to v = 11. A technique was developed for measuring the tuning range and bandwidth of a tunable ArF laser used to generate vacuum-ultraviolet photons. Two-photon absorption cross sections for X yields EF excitation in H2 were calculated for a wide range of X and EF vibrational levels. Attempts to use both one- and two-photon laser-induced fluorescence to detect excited levels were unsuccessful.