Abstract
Ac-driven low-pressure He–Xe lamp discharges have been studied by experiment and self-consistent modelling in a wide parameter range. The calculated periodic behaviour of the electrical characteristics, the axis densities of the lowest excited xenon atoms and the output power of VUV radiation are compared with the results of electrical measurements and of tuneable diode laser absorption spectroscopy. Special attention is paid to the experimental studies of the behaviour of the xenon states Xe(1s3) and Xe(1s2). The influence of the pulse frequency on the discharge and output characteristics is discussed regarding the corresponding results for a dc discharge. Using the verified model, optimum discharge conditions with respect to high efficiency and output power of the VUV radiation have been revealed.
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