229 research outputs found
REMOTE: An overview of the FLUKA particle transport code and its graphical user interface Flair
No full textAbstract:An overview shall be presented of FLUKA, a general-purpose code for the Monte Carlo simulation of radiation transport, and of its powerful graphical interface Flair. FLUKA can transport over 60 particle species, including photons, leptons, hadrons and ions, at energies up to the PeV domain and down to the keV domain, with the exception of neutrons, which can be transported down to the meV. Material geometries can be described via FLUKA's combinatorial geometry package, from the simplest geometries up to elaborate geometries e.g. extended portions of the Large Hadron Collider. FLUKA accounts for the most relevant electromagnetic and hadronic interaction mechanisms, providing a self-contained approach to the simulation of coupled hadronic and electromagnetic radiation showers. FLUKA's graphical user interface Flair provides a fully integrated environment to run FLUKA, from the preparation of the input file, to the construction of the geometry, specification of the radiation source, of the quantities to be scored. Furthermore, it controls the execution of the simulation, the processing of output files, and the visualization of simulation results. To showcase the capabilities of Flair and FLUKA, several application examples shall be presented, ranging from neutronics to medical physics. Short Bio Vasilis VlachoudisDr. Vasilis Vlachoudis has a PhD in Nuclear Physics from Univ. of Bordeaux France. Currently holds a senior staff position as physicist in the Beam Matter Interactions section at CERN. The section is in charge of the FLUKA MC code development and its application to the CERN accelerator complex. Vasilis is leading the FLUKA (https://fluka.cern) code development and he is the lead author of flair (https://flair.cern) graphical interface used for FLUKA and for other MC codes. Furthermore, Vasilis has an active role in the neutron time of flight facility at CERN as responsible for the spallation target physics optimisation and design, as well as the experimental data processing chain.</p
Bridging Monte Carlo worlds: a new framework for accelerator simulations applied on shielding and machine protection studies
No full textThis thesis delves into the critical study of particle transport in matter, particularly emphasising
its implications for machine protection at CERN's accelerator complex and facilities. To conduct
studies of this nature, FLUKA and Geant4 stand out within a small group of general-purpose,
multi-particle Monte Carlo codes, validated in energies reaching the multi-TeV. However, their
structural differences and user interface philosophies present significant challenges in obtaining
results with both codes for the same problems. Overcoming these challenges is crucial, considering
the inherent limitations of MC codes due to their physical models and reliance on specific databases
for particle transport calculations.
A significant contribution of this work is the development of "Moira", a new software that
integrates the infrastructure of Geant4 with the capability to process FLUKA inputs. This novel
Geant4 application allows for a unique comparison of results between the two codes, enabling
simulations with equivalent characteristics, with the primary distinction being the physical models
used.
Using "Moira", this thesis presents a series of simulations using alternative models to FLUKA's, to
analyse shielding and machine protection studies, focusing mainly in scenarios covering sections
that span hundreds of meter in the Large Hadron Collider. Doing these simulations with multiple
physics models permit to obtain a better quantification of the systematic errors, and also contribute
significantly to the development of Monte Carlo codes.LPA
Capture and Fission rate of 232-Th, 238-U, 237-Np and 239-Pu from spallation neutrons in a huge block of lead.
No full textThe study is centered on the research of the incineration possibility of nuclear waste, by the association of a particle accelerator with a multiplying medium of neutrons, in the project "Energy Amplifier" of C. Rubbia. It consists of the experimental determination of the rates of capture and fission of certain elements (232-Th, 238-U, 237-Np and 239-Pu) subjected to a fluence of fast spallation neutrons. These neutrons are produced by the interaction of high kinetic energy protons (several GeV) provided by the CERN-PS accelerator, on a large lead solid volume. The measurement techniques used in this work, are based on the activation of elements in the lead volume and the subsequent gamma spectroscopy of the activated elements, and also by the detection of fission fragment traces. The development, of a Monte Carlo code makes it possible, on one hand, to better understand the relevant processes, and on the other hand, to validate the code, by comparison with measurements, for the design and the construction of an incineration system
Flair: A powerful but user friendly graphical interface for FLUKA
No full textFLAIR is an advanced user graphical interface for FLUKA, to enable the user to start and control FLUKA jobs completely from a GUI environment without the need for command-line interactions. It is written entirely with python and Tkinter allowing easier portability across various operating systems and great programming flexibility with focus to be used as an Application Programming Interface (API) for FLUKA. FLAIR is an integrated development environment (IDE) for FLUKA, it does not only provide means for the post processing of the output but a big emphasis has been set on the creation and checking of error free input files. It contains a fully featured editor for editing the input files in a human readable way with syntax highlighting, without hiding the inner functionality of FLUKA from the users. It provides also means for building the executable, debugging the geometry, running the code, monitoring the status of one or many runs, inspection of the output files, post processing of the binary files (data merging) and interface to plotting utilities like gnuplot and PovRay for high quality plots or photo-realistic images. The program includes also a database of selected properties of all known nuclides and their known isotopic composition as well a reference database of ∼ 300 predefined materials together with their Sterheimer parameters
The Psárský forest in the district of Prague - West as a location of school science excursion
No full textDiplomová práce NÁZEV: Psárský les v okrese Praha - západ jako lokalita přírodovědné školní exkurze AUTOR: Bc. Michala Prokopcová KATEDRA: Katedra biologie a environmentálních studií, Pedagogická fakulta, Univerzita Karlova VEDOUCÍ PRÁCE: doc. RNDr. Vasilis Teodoridis, Ph.D. ABSTRAKT Tato diplomová práce zpracovává lokalitu Psárského lesa v okrese Praha - západ jako vhodnou oblast pro realizaci přírodovědné školní exkurze. Hlavním cílem této práce byla příprava a realizace komplexní přírodovědné exkurze do Psárského lesa a ověření její edukační efektivity u žáků nižších tříd 2. stupně ZŠ formou pedagogického výzkumu. Výzkum byl uskutečněn prostřednictvím didaktických testů, které porovnávaly vstupní znalosti před exkurzí (pretest) a nabyté znalosti po exkurzi (posttest). Didaktický koncept přírodovědné exkurze do Psárského lesa byl zpracován v souladu s klíčovými aspekty oborové didaktiky biologie a na základě komplexního vyhodnocení zájmové oblasti pro plánovanou exkurzi, která tvořila podklad pro exkurzní náplň a vytipování vhodných stanovišť k exkurzním činnostem. Dále v rámci diplomové práce proběhlo navazující šetření prostřednictvím postojového dotazníku ke zjištění přínosu exkurzí ve výuce přírodopisu z pohledu žáků. Výsledky výzkumu potvrzují, že exkurze je vnímána jako efektivní a zároveň...Thesis TITLE: The Psárský forest in the district of Prague - West as a location of school science excursion AUTHOR: Bc. Michala Prokopcová DEPARTMENT: Department of Biology and Environmental Studies, Faculty of Education, Charles University SUPERVISOR: doc. RNDr. Vasilis Teodoridis, Ph.D. ABSTRACT The aim of the thesis is to examine the Psárský forest locality in the Prague-West region as regards its suitability for a school science excursion. The principal objective of the thesis was to prepare and take a comprehensive science excursion to Psárský forest and verify its educational efficiency for pupils of lower secondary school grades by means of pedagogical research. The research was carried out through didactical tests comparing the initial knowledge before the excursion (pretest) and acquired knowledge after the excursion (posttest). The didactical concept of the science excursion to Psárský forest was elaborated in accordance with the key aspects of the field biology didactics and based on complex evaluation of the fields of interest for the excursion planned to become a basis for the excursion contents and selection of suitable places for excursion activities. In addition to this, subsequent research via the attitude questionnaire to identify the excursions benefits within natural science education from...Katedra biologie a environmentálních studiíPedagogická fakultaFaculty of Educatio
FLUKA coupling to Sixtrack
No full textSixTrack and FLUKA are simulation tools regularly used at CERN to perform LHC collimation studies. Until recently the communication between the two codes was weakly based on the use of file exchange. The present paper describes the current status of the FLUKA – SixTrack coupling, a TCP/IP interface to provide seamless communication between them and to finally behave like a single running program
Content analyses of the textbooks of biology (natural history) for pupils with hearing impairment as a starting point for creating workbooks
No full textTITLE: Content analyses of the textbooks of biology (natural history) for pupils with hearing impairment as a starting point for creating workbooks AUTHOR: RNDr. Jana Skýbová DEPARTMENT: Biology and Environmental Studies, Faculty of Education, Charles University in Prague TUTOR: doc. RNDr. Vasilis Teodoridis, Ph.D. ABSTRACT: The main aim of the dissertation thesis was to perform content analyses textbooks of biology (natural history) for elementary schools dedicated for pupils with hearing impairment as a base for the special workbooks creation in accordance with curricular and legislative documents. The next aim of thesis was the realization of educational research in all elementary schools for pupils with hearing impairment in the Czech Republic that focusing on teaching process of natural sciences and work with existing (author's) special textbooks for these pupils with accent on analysis of requirements of teachers and pupils for newly created workbooks. Methods of the mentioned pedagogic research was qualitative and quantitative, i.e. questionnaire complemented by interviews. The results of empirical research using textbooks of biology (natural history) in elementary schools dedicated for pupils with hearing impairment in the Czech Republic derived from the current requirements of the teacher-..
A Monte Carlo Approach to Imaging and Dose Simulations in Realistic Phantoms Using Compact X-Ray Source
No full textX-ray emitters are amongst the most widely used tools in medicine. Based on compact electron beams, they are utilised for a range of applications, including medical imaging and cancer treatment. The optimisation of a specific X-ray source relies on detailed simulation studies into the achievable resolution and intensity distribution. Monte Carlo (MC) codes are widely used in the medical community for dose estimation to patients and the environment. They are also ideally suited for simulating 3D intensity distributions in realistic environments. This demands accurate and reliable physical models capable of handling all components of the expected radiation field. In this paper the capabilities of the FLUKA MC code to simulate complex X-ray sources are presented. Advanced phantoms, based on imported DICOM format, are used to evaluate the dose to relevant areas, including the patient, individual organs and the treatment room. It is also shown how they can provide a good basis to reproduce radiography images by scoring photon fluencies
Fluka and thermo-mechanical studies for the CLIC main dump
No full textIn order to best cope with the challenge of absorbing the multi-MW beam, a water beam dump at the end of the CLIC post-collision line has been proposed. The design of the dump for the Conceptual Design Report (CDR) was checked against with a set of FLUKA Monte Carlo simulations, for the estimation of the peak and total power absorbed by the water and the vessel. Fluence spectra of escaping particles and activation rates of radio-nuclides were computed as well. Finally, the thermal transient behavior of the water bath and a thermo-mechanical analysis of the preliminary design of the window were done
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