High-Temperature Photoelectron Spectroscopy. An Increased Sensitivity Spectrometer for Studying Vapor-Phase Species Produced at Furnace Temperatures > 2000K

摘要

The construction and performance of a photoelectron spectrometer designed for the vapor-phase study of high-temperature species is described. An inductively heated furnace is used to produce atoms and molecules in the vapor phase at furnace temperatures>2000K. Electrical interference is eliminated using pulsed heating and gated electronics. A microchannel plate phosphor silicon-intensified-target camera detector is used for rapid data acquisition to minimize problems caused by time-dependent contamination in the ionization region. A dedicated, menu-driven, firmware-based interface, with key pad control, is utilized. The TV monitoring of the photoelectron line images and use of a video window to select data allow optimum spectral conditions to be preserved during and experiment. Results show reductions in data acquisition times of up to 90 compared to equivalent single-channel detector experiments.