Comments on the stochastic characteristics of fission chamber signals
Artikel i vetenskaplig tidskrift, 2014

This paper reports on theoretical investigations of the stochastic properties of the signal series of ionisation chambers, in particular fission chambers. First, a simple and transparent derivation is given of the higher order moments of the random detector signal for incoming pulses with a non homogeneous Poisson distribution and random pulse heights and arbitrary shape. Exact relationships are derived for the higher order moments of the detector signal, which constitute a generalisation of the so-called higher order Campbelling techniques. The probability distribution of the number of time points when the signal exceeds a certain level is also derived. Then, a few simple pulse shapes and amplitude distributions are selected as idealised models of the detector signals. Assuming that the incoming particles form a homogeneous Poisson process, explicit expressions are given for the higher order moments of the signal and the number of level crossings in a given time interval for the selected pulse shapes.

order campbell techniques

neutron-flux measurement

Författare

L. Pal

Magyar Tudomanyos Akademia

Imre Pazsit

Chalmers, Teknisk fysik, Nukleär teknik

Zsolt Elter

Chalmers, Teknisk fysik, Nukleär teknik

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

0168-9002 (ISSN)

Vol. 763 44-52

Ämneskategorier

Subatomär fysik

DOI

10.1016/j.nima.2014.06.018