Pulsed Townsend Technique in Electronegative Gases
نویسنده
چکیده
The identification of alternatives to SF6 requires a study of the effective coefficient of electron attachment to electronegative gases and gas mixtures. One well established method for obtaining the attachment coefficient is the determination of swarm parameters using the pulsed Townsend discharge (PTD). From theoretical considerations and finite element calculations design guidelines for a PTD experiment are defined. Dimensions and properties of the setup are described. The setup optimizes the field homogeneity, the analogue bandwidth and the high voltage stability, and also includes a rear-illuminated photocathode. Currently a PTD setup with these optimized parameters is under construction.
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