Modelling and Investigation of Primary Fabrication of Neutron Detector Based on Carbon Nano Particles in a Given Energy Range

Kasani, Hadi (2017) Modelling and Investigation of Primary Fabrication of Neutron Detector Based on Carbon Nano Particles in a Given Energy Range. Doctoral thesis, University of Mohaghegh Ardabili.

Preview

Text (مدل‌سازی و بررسی ساخت اولیه آشکارساز نوترون بر پایه نانو ذرات کربنی در بازه انرژی داده شده) Hadi Kasani.pdf Download (1MB) | Preview

Abstract

This thesis consists of two main parts: the introduction of charged particle detector based on carbon nanoparticles, and the suitable neutron converter for neutron detection. In the first part, a metal-semiconductor-metal device based on carbon nanoparticles has been made by using a hydro-carbonate gas as a carbon source, and a change in electrical characteristics of fabricated devise with beta radiation is established. Following, various structural analyses are applied on fabricated carbon-based semiconductor and the presence of multi-walled nanotubes is observed. Also, the electrical parameters of devise were extracted by using conventional techniques. In the second part of the thesis, a metal-semiconductor-metal devise has been made based on a combination of multi-walled nanotubes with polyethylene and a polyethylene layer is used to change neutron to recoiling proton. Current-voltage and current-time measurements are performed in the presence of neutrons so that the change of electrical characteristics before and after irradiation is observed. The impedance spectroscopy technique is used to estimate the depletion region width so that for the fabricated devise based on the combination of multi-walled nanotubes with polyethylene, when the voltage is large enough, the full depleted condition is observed. Then, the detectable energy range of neutrons with fabricated samples is estimated using the stopping power of protons in different energies. Finally, the fabricated devise based on a combination of multi-walled nanotubes with polyethylene is introduced as a solid-state detector for fast neutron spectroscopy. So, the HDPE/MWCNTs-based MSM detector can be used as a total neutron flux detector with conjunction with a PE converter which has a linear relation between the electrical current and the neutron fluxes.

Actions (login required)

View Item