Author/Authors :
Devismes، نويسنده , , A and Finck، نويسنده , , Ch and Kress، نويسنده , , T and Gobbi، نويسنده , , A and Eschke، نويسنده , , J and Herrmann، نويسنده , , N and Hildenbrand، نويسنده , , K.D and Koczon، نويسنده , , P and Petrovici، نويسنده , , M، نويسنده ,
Abstract :
A spark counter of the type developed by Pestov has been tested with the aim of searching for an optimum time response function, changing voltage, content of noble and quencher gases, pressure and energy-loss. Replacing the usual argon by neon has brought an improvement of the resolution and a significant reduction of tails in the time response function. It has been proven that a counter as long as 90 cm can deliver, using neon gas mixture, a time resolution σ<60 ps with about 1% absolute tail and an efficiency of about 90%.
Keywords :
Time-of-flight detectors , Noble gas mixtures , Townsend coefficient , Drift velocity , Spark counters
