H Proposal Defense

Topic

The performance of a neutron sensitive gaseous detector based on thick gaseous electron multiplier detectors.(THGEM)

Introduction

Gaseous electron multiplier detectors lately become very common in nuclear and high energy physics experiments. The detector has has ability to detect the rare events in a high resolution.In addition to its flexibility to adapt any shape and any detection area needed for any experiment. Furthermore, THGEM is rebust,economic in design and operating.

Neutrons are nucleons with neutral charge, They interacts generally with high atomic number elements that have high cross sections for certain reactions.Mostly,the neutron interactions are represented by fission, capture,conversion (to an alpha or a proton) and scattering.

A neutron THGEM detector project is basically building the detector using the standards related to THGEM detectors, but adding to the detecting surface an element with a high cross section for a neutron interaction. In our case the THGEM foil will be covered by thorium-232 or uranium-238 which have relatively a high cross section for fission when the neutron energy range is between 5-14 MeV.

The THGEM neutron detector is supported by a read out wire net to get the signal, the read out wire net is connected to a gum stick and a break board, a software (coda) is responsible for collecting and filing the data, then analyzing the data by ROOT (software package).

Sect1 electron Multiplication

The electrons are fermions, negatively charged particles, located around the nucleus. Electron multiplication is releasing the electron(s) of the gas from the domain of the nucleus. Any element has an ionization energy, the electron becomes free when it get an energy higher the ionization.