Total and Partial Fragmentation Cross-Section of 500 MeV/nucleon Carbon Ions on Different Target Materials

By using an experimental setup based on thin and thick double-sided microstrip silicon detectors, it has been possible to identify the fragmentation products due to the interaction of very high energy primary ions on different targets. Here we report total and partial cross-sections measured at GSI (Gesellschaft fur Schwerionenforschung), Darmstadt, for 500 MeV/n energy $^{12}C$ beam incident on water (in flasks), polyethylene, lucite, silicon carbide, graphite, aluminium, copper, iron, tin, tantalum and lead targets. The results are compared to the predictions of GEANT4 (v4.9.4) and FLUKA (v11.2) Monte Carlo simulation programs.Comment: 10pages, 13figures, 4table

Experimentalni studie produkce neutralnich mezonu v relativistickych jadernych srazkach.

The heavy ion collisions at incident energies of 1-2 A GeV are a unique tool to investigate the properties of nuclear matter at high temperature and density - one of the major goal of the nuclear physics. According to various theoretical model calculations nuclear matter can be compressed to 2-3times the normal nuclear density and heated to temperatures of 100 MeV in this energy regime. In addition, during the compression phase of the heavy ion collision a significant fraction of participating nucleons is excited to short-lived resonance states, which subsequently decay via meson emission. Experimentally, this can be studied by measurements of meson yields as a function of the system mass, the beam energy and reaction centrality, momentum distribution and emission patterns relative to the reaction plane. An experimental program to study neutral meson production was realised at SIS facility at GSI Damstadt, Germany by TAPS collaboration. The combination of a photon spectrometer TAPS - an electromagnetic calorimeter with good energy, time and spatial resolution - and the charged particle detecting KAOS Forward Wall offers a possibility to study azimuthal distribution of neutral mesons relative to the reaction plane. The experimental data from Au+Au reaction at 800 MeV were analyzed.Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi

Application of the FAIR facility to space radiation research: Final report - executive summary

The radiation environment in space has severely adverse effects on humans, electronics and materials. The most challenging part of the environment for our understanding of the effects are the highly charged highly energetic (HZE) particles. This study looks at the possibilities FAIR offers for space radiation research. There are two main parts: first the open issues and needed research in space radiation involving heavy ions of high energy and second the requirements a facility for this research should meet checked against the possibilities at FAIR

Investigations of Single Event Effects With Heavy Ions of Energies up to 1.5 GeV/n

The ESA SEU-Monitor, a 2 Gbit DDR2 SDRAM and a 100 V n-channel power MOSFET have been irradiated at GSI with ions of energies from 80 to 1500 MeV/n. The measured SEE sensitivities are compared to low energy ( < 50 MeV /n ) data. The ESA SEU-Monitor and the DDR2 SDRAM showed only differences in the cross sections below the ionization threshold. Here the cross sections were lower for the high energy ions compared to the low energy ions. The power MOSFETs on the other hand showed a reduced safe operating area (SOA) for the high energy ions, although some experimental reasons other than the ion energy cannot be ruled out here

Performance of the reconstruction algorithms of the FIRST experiment pixel sensors vertex detector

Hadrontherapy treatments use charged particles (e.g. protons and carbon ions) to treat tumors. During a therapeutic treatment with carbon ions, the beam undergoes nuclear fragmentation processes giving rise to significant yields of secondary charged particles. An accurate prediction of these production rates is necessary to estimate precisely the dose deposited into the tumours and the surrounding healthy tissues. Nowadays, a limited set of double differential carbon fragmentation cross-section is available. Experimental data are necessary to benchmark Monte Carlo simulations for their use in hadrontherapy. The purpose of the FIRST experiment is to study nuclear fragmentation processes of ions with kinetic energy in the range from 100 to 1000 MeV/u. Tracks are reconstructed using information from a pixel silicon detector based on the CMOS technology. The performances achieved using this device for hadrontherapy purpose are discussed. For each reconstruction step (clustering, tracking and vertexing), different methods are implemented. The algorithm performances and the accuracy on reconstructed observables are evaluated on the basis of simulated and experimental data

FIRST experiment: Fragmentation of Ions Relevant for Space and Therapy

Nuclear fragmentation processes are relevant in different fields of basic research and applied physics and are of particular interest for tumor therapy and for space radiation protection applications. The FIRST (Fragmentation of Ions Relevant for Space and Therapy) experiment at SIS accelerator of GSI laboratory in Darmstadt, has been designed for the measurement of different ions fragmentation cross sections at different energies between 100 and 1000 MeV/nucleon. The experiment is performed by an international collaboration made of institutions from Germany, France, Italy and Spain. The experimental apparatus is partly based on an already existing setup made of the ALADIN magnet, the MUSIC IV TPC, the LAND2 neutron detector and the TOFWALL scintillator TOF system, integrated with newly designed detectors in the interaction Region (IR) around the carbon removable target: a scintillator Start Counter, a Beam Monitor drift chamber, a silicon Vertex Detector and a Proton Tagger for detection of light fragments emitted at large angles (KENTROS). The scientific program of the FIRST experiment started on summer 2011 with the study of the 400 MeV/nucleon 12C beam fragmentation on thin (8mm) carbon target