Book/Report

FZJ-2016-07629

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Verbesserung eines Rechenprogramms zur Bestimmung der Neutronenwirksamkeit von grossflächigen SPNDs durch die Berücksichtigung der Ladungsträgerproduktion im Isolator

Meier, B.FZJ* ; Brixy, H.FZJ*

1982
Kernforschungsanlage Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/13236

Report No.: Juel-Spez-0152

Abstract: This paper presents a computer program for calculating the signal current of a large surface prompt-response self-powered neutron detector (SPND). The program is an improved version of a program developed by Al-Dabagh /2/, which was designed for calculating the current only from the emitter of a SPND. In addition to the emitter current the improved program calculates the insulator current and the collector current, and combines these three currents into a current for the complete detector. This detector current accounts for an electric potential inside the insulator and the balancing currents generated hereby. The basic theory and the organisation of theimproved program is described in the paper, with a listing of the source program presented in the appendix. Calculations performed for 80 SPNDs show a significant contribution of the insulator to the detector current. The insulator current may exceed the current from a very thin emitter. This causes a depletion of electrons in the insulator and results in a positive potential. Nevertheless, the emitter thickness proves to be the more important design parameter. The components of the detector current due to. Compton and photoelectric effects as well as discrete and continuum radiations were determined in an investigation. The comparison with a measured value shows the computer program provides useful results, but even in the improved program some deficiencies are recognized. These are explained and estimated in the paper.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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