This work is related to a recent development of a data acquisition and control system for high‐resolution EUV spectroscopy following ion–atom and ion–molecule collisions. The system consists of a personal computer, an IEEE‐488 interface board, and a CAMAC system, which includes a GPIB crate controller, a stepping motor controller, and two 32‐bit up–down counters. A unique software ‘‘DATACQ’’ for data acquisition and control has been designed and tested to simplify complex spectroscopy applications. As a prototype case, EUV spectra of the Lyman series of He+ following simultaneous ionization and excitation of He by fast H+, H+2, and H+3 impact are presented here.

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