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

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 temperature >2000 K. 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 data 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 an experiment. Results show reductions in data acquisition times of up to 90 compared to equivalent single-channel detector experiments.