Naslov
Experimental study of gas mixtures in strong non-uniform electric fields

Autori
Krajcar Bronić, Ines ; Grosswendt, Bernd

Izvornik
Radiation Physics and Chemistry (0969-806X) 61 (2001); 477-478

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
gas mixtures; proportional counter; strong electric fields; non-uniform fields; gas gain; energy resolution; single-electron spectra

Sažetak
Argon-based gas mixtures of various concentration ratios at low pressures were studied in a gas proportional counter. Over-exponential increase of gas gain in mixtures with low partial pressure of any admixture was observed. The best energy resolution was measured at gas gain of several hundreds for lower admixture concentrations, but at high gas gains R degraded very fast. The first Townsend ionization coefficient a/P in low-pressure gases depended also on the gas pressure. The single-electron spectra had a peaked shape in mixtures with relatively high content of the molecular gas. In mixtures with lower molecular gas amount they changed the shape toward the over-exponential distribution. A partial pressure of 10 kPa was determined as a requirement for good quenching property of the mixture.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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