In this paper we report a feasibility study of the gamma ray transmission imaging using a double gap resistive plate chamber. The detector consists of two layers of 2 mm resistive plate chamber (RPC) gaps with two-dimensional read-out strips of 10 mm pitch. Gamma ray transmission images for objects inside a cabinet, using a 10 mCi 137 Cs isotope, were obtained with a pixel resolution of 5 Â 5 m...

This is a summary of our assesment of QoS capabilities of the JuniperM10 router. We performed this assesment as a part of our QoS in IP project. This is not a scientific test, just our practical view based on our experience with QoS-related topics. We are gathering information about current possibilities of network QoS implementations available with various equipment and technologies. We are pr...

Exotic stable massive particles (SMP) are proposed in a number of scenarios of physics beyond the Standard Model. It is important that LHC experiments are able both to detect and extract the quantum numbers of any SMP with masses around the TeV scale. To do this, an understanding of the interactions of SMPs in matter is required. In this paper a Regge-based model of R-hadron scattering is exten...

We propose a methodology to match detailed BGP updates from two neighboring Autonomous Systems (ASes). This methodology allows us to characterize route propagation and measure the route propagation time. We apply this methodology to two months of all BGP updates from Abilene and GEANT to perform the first thorough characterization of BGP route propagation between two neighbor ASes. Our results ...

The BaBar experiment uses data since 1999 in examining the violation of charge and parity (CP) symmetry in the field of high energy physics. This event simulation experiment is a compute intensive task due to the complexity of the Monte-Carlo simulation implemented on the GEANT engine. Data needed as input for the simulation (stored in the ROOT format), are classified into two categories: condi...

The problem of a jet modelling at the CMS test beam experiments has been studied using GEANT 3.21 package. A simple experimental setup consisting of an active target and a hodoscope in the forward hemisphere is proposed to separate spectator jets from single particles which passed the target without interaction. The rejection factor of proposed algorithm for single particles is better then 1000...

An iron sampling calorimeter with warm-liquid ionization chambers has been tested at the CERN SPS in order to study the signal development and to verify the energy calibration of the hadron calorimeter in the KASCADE-Grande air shower experiment. The absolute energy calibration of the detectors is discussed. Results of the analysis of the lateral and longitudinal shower development in the calor...

The STAR experiment at RHIC is a large acceptance detector. The ElectroMagnetic Calorimeter (EMC) will provide a sensitive trigger to study high pt jets and hard photons in AuAu, pp, and pAu collisions. The capability for the EMC to trigger on jets and direct photons was studied for trigger level 0. Trigger efficiencies and expected process rates were obtained for pp and pAu reactions, which wi...

Geant4 is a toolkit for the simulation of the passage of particles through matter. It provides a comprehensive set of tools for geometry, tracking, detector response, run, event and track management, visualization and user interfaces. Geant4 also has an abundant set of physics models that handle the diverse interactions of particles with matter across a wide energy range. However, there are als...

The Geant4 simulation toolkit is currently adopted by many particle physics experiments, including those at the Large Hadron Collider and ones proposed for future lepton hadron colliders. In present era of precision tests Standard Model increasingly detailed detectors colliders scenario, plays a key role. It required to remain reliable stable detector simulations same time undergo major improve...