Title :
Shape transition of the discharge ion distribution around an anode wire of a gas counter
Author :
Matoba, M. ; Urase, K. ; Ohgaki, H. ; Ijiri, H. ; Uehara, S. ; Fujiki, T. ; Koori, N. ; Sakae, T.
Author_Institution :
Graduate Sch. of Eng. Sci., Kyushu Univ., Kasuga, Japan
Abstract :
The discharge-ion density around an anode wire of a gas counter has been measured with a cylindrical counter having a rotating electrode. The azimuthal ion density has been determined from raw data of the induced signals in the rotating electrode by solving a set of linear equations with an analytical weighting function. The results are given as a function of the anode high voltage. The angular width of the discharge-ion density shows a transition between the proportional- and streamer-mode operations of the counter. This is considered evidence of a shape transition of the discharge-ion density around the anode wire of the gas counter in high-electric-field operation.<>
Keywords :
ionisation chambers; proportional counters; radiation detection and measurement; streamer chambers; anode wire; azimuthal ion density; cylindrical counter; discharge ion distribution; gas counter; linear equations; proportional; rotating electrode; shape transition; streamer-mode; Anodes; Counting circuits; Density measurement; Electrodes; Equations; Rotation measurement; Shape; Signal analysis; Voltage; Wire;
Journal_Title :
Nuclear Science, IEEE Transactions on
