On the Electric Breakdown in Liquid Argon at Centimeter Scale

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We present a study on the dependence of electric breakdown discharge properties on electrode geometry and the breakdown field in liquid argon near its boiling point.

• The measurements were performed with a spherical cathode and a planar anode at distances ranging from 0.1 mm to 10.0 mm.
• A detailed study of the time evolution of the breakdown volt-ampere characteristics was performed for the first time.
• It revealed a slow streamer development phase in the discharge.