eng https://phaidrabg.bg.ac.rs/o:29983 doi:10.2298/NTRP1602159D ISSN: 1451-3994 2016 All rights reserved INSULATION CO-ORDINATION AND THE ENLARGEMENT LAW FOR THE GM COUNTER TUBE KOORDINACIJA IZOLACIJE I ZAKON PORASTA ZA BROJAČKE CEVI GM BROJAČA application/pdf 868896 bytes Dolićanin, Edin Ć. Fetahović, Irfan S. Lazarević, Djordje R. Kartalović, Nenad M. Nuclear Technology & Radiation Protection 31(2) info:eu-repo/semantics/article Keywords: GM counter, insulation co-ordination, enlargement law. Ključne reči: GM-brojač, koordinacija izolacije, zakon porasta. Abstract: In this paper we analyze application of contemporary methods of insulation co-ordination and the enlargement law in designing a GM counting tube. It has been shown that by applying insulation co-ordination methods the counting tube can be optimally dimensioned. The application of the enlargement law was demonstrated in generalizing the results of test obtained by the GM tube to those obtained by the counting tube with m-times greater dimensions. The investigations were conducted both theoretically and by experiment. Using theoretical analysis, we derived the expressions that may be applied if a performance function of a random variable breakdown voltage is known. The experiments were conducted on a GM counter model under well controlled laboratory conditions. Sažetak: U radu se razmatra primena savremenih metoda koordinacije izolacije i zakona porasta na konstrukciju GM brojčke cevi. Pokazano je kako je primenom metoda koordinacije izolacije moguće optimalno dimenzionisati brojačku cev. Demonstrirana je mogućnost primene zakona porasta na uopštavanje rezultata ispitivanja dobijenih GM brojačkom cevi na rezultate koji bi se dobili brojačkom cevi m-puta većih dimenzija. Razmatranja su obavljena teorijski i eksperimentalno. Teorijskom analizom izvedeni su obrasci koje je moguće primeniti ako se zna funkcija izvodnica slučajne promenljive, probojni napon. Eksperimenti su vršeni na modelu GM brojača pod dobro kontrolisanim laboratorijskim uslovima.