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Re: Streamer colour

Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>

At 11:54 AM 4/4/2005, Tesla list wrote:
Original poster: "Steven Steele" <sbsteele@xxxxxxxxxxxxx>

Why would one have a spark gap in anything other than regular air?

Different gases have different breakdown, and more importantly, recovery properties. The thermal and mechanical properties (primarily conductivity and viscosity) also have an effect.

Hydrogen is very popular for fast gaps, because it "recovers" very quickly, and has high thermal conductivity.

Electronegative gases (i.e. SF6) are used in high breakdown voltage applications, but I don't know that they have particularly fast recovery.