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Comments on the stochastic characteristics of fission chamber signals

L. Pal ; Imre Pázsit (Institutionen för teknisk fysik, Nukleär teknik) ; Zsolt Elter (Institutionen för teknisk fysik, Nukleär teknik)
Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment (0168-9002). Vol. 763 (2014), p. 44-52.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: order campbell techniques, neutron-flux measurement



Denna post skapades 2014-11-13. Senast ändrad 2015-02-05.
CPL Pubid: 205768

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Kärnfysik

Chalmers infrastruktur