Evaluation of the Efficiency of High-Frequency Methods for Distance Determination in Mining Conditions

В статье рассматриваются методы определения расстояния с использованием электромагнитных волн С‑диапазона (4–8 ГГц) в условиях шахт. Представлен анализ распределения напряженности электрического поля дипольной антенны, установленной на кузов грузовой машины, в горных выработках с переменными свойствами горных пород. Дана характеристика негативных факторов, влияющих на точность определения расстояния методом Time- Flight (ToF). Также проведена экспериментальная оценка расстояния между двумя UWB модулямиThe article discusses methods for determining the distance using electromagnetic waves C‑band (4–8 GHz) in mines. An analysis of the distribution of the electric field strength of a dipole antenna mounted on a truck body in mine workings with variable rock properties is presented. The characteristics of the negative factors affecting the accuracy of distance determination by the Time- Flight (ToF) method are given. An experimental estimate of the distance between two UWB modules has also been mad

CHIPS_TPT models for exclusive Geant4 simulation of neutron-nuclear reactions at low energies

A novel TPT code (Toolkit for Particle Transport), which is included in CHIPS_TPT physics list for Geant4 simulations, is briefly overviewed. Underlying concept of exclusive modelling is introduced and its beneficial features are illustrated with several examples. Widely used neutron Monte Carlo codes, MCNP and Geant4/HP, are based on inclusive algorithms that independently model neutron state change and secondary particles production while tracking. The exclusive approach implemented in TPT overcomes this unphysical separation and makes it possible to allow for kinematic restrictions as well as correlated emission of gamma-rays and secondaries