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SUMMARY:Dielectric Strength of Noble and Quenched Gases for High Pressure 
 Time Projection Chambers
DTSTART;VALUE=DATE-TIME:20210916T153000Z
DTEND;VALUE=DATE-TIME:20210916T154500Z
DTSTAMP;VALUE=DATE-TIME:20260606T142227Z
UID:indico-contribution-85@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Logan Norman ()\nDielectric breakdown strength is on
 e of the critical performance metrics for gases and mixtures used in large
 \, high pressure gas time projection chambers. We have experimentally stud
 ied dielectric breakdown strengths of several important time projection ch
 amber working gases and gas-phase insulators over the pressure range 100 m
 bar to 10 bar\, and gap sizes ranging from 0.1to 10 mm. Gases characterize
 d include argon\, xenon\, CO2\, CF4\, and mixtures 90-10 argon-CH4\,90-10 
 argon-CO2and 99-1 argon-CF4. We developed a theoretical model for high vol
 tage breakdown based on microphysical simulations that use PyBoltz electro
 n swarm Monte Carlo results as input to Townsend- and Meek-like discharge 
 criteria. This model is shown to be highly predictive at high pressure\, o
 ut-performing traditional Paschen-Townsend and Meek-Raether models signifi
 cantly. At lower pressure-times-distance\, the Townsend-like model is an e
 xcellent description for noble gases whereas the Meek-like model provides 
 a highly accurate prediction for insulating gases.\n\nhttps://indico.physi
 cs.ucsd.edu/event/1/contributions/85/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/85/
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