Prof.
Takashi Nakamura
(Shimizu Corporation)
6/2/10, 9:10 AM
Source term and related topics
This review summarises data up to 2008 on energy and angular distributions of neutrons produced from thick targets of various materials bombarded by protons, deuterons, He and heavier ions having wide energy range from MeV to GeV. Total neutron yields are also presented. Production cross section data for spallation by proton to Ar ion are also summarized in this talk, as well as excitation...
Igor Rakhno
(Fermilab)
6/2/10, 9:40 AM
Source term and related topics
Test facilities for high-gradient superconducting RF cavities usually are strong sources of radiation due to field emitted electrons inside the cavities. Design of shielding for such facilities involves significant uncertainties because of lack of a reliable model of the field emission. Present work describes a semi-empirical method that allows us to predict the intensity of the generated...
Dr
Yosuke Iwamoto
(Japan Atomic Energy Agency)
6/2/10, 10:00 AM
Source term and related topics
The neutron energy spectra penetrating 10 to 100 cm thick iron and 25 to 200 cm thick concrete shields have been measured using 138, 243 and 387 MeV quasi-monoenergetic neutron sources at the Research Center for Nuclear Physics (RCNP) facility, Osaka University, Japan. The source neutrons were produced from a 1 cm thick lithium target bombarded with 140, 245 and 388 MeV protons. Two types of...
Vladimir Mares
(Helmholtz Zentrum Muenchen, Institute of Radiation Protection, Germany)
6/2/10, 10:50 AM
Source term and related topics
This paper describes the results of neutron spectrometry using Bonner Sphere Spectrometer (BSS) at the ring cyclotron facility at the Research Center for Nuclear Physics (RCNP), Osaka University, Japan. The BSS system consists of 15 polyethylene (PE) spheres with spherical 3He proportional counters in their center. It also includes two PE spheres with lead shells inside, to increase their...
Dr
Nobuhiro Shigyo
(Kyushu university)
6/2/10, 11:10 AM
Source term and related topics
Neutron energy spectrum from 120 GeV protons on a thick copper target was measured at the Meson Test Beam Facility (MTBF) at Fermi National Accelerator Laboratory (FNAL), USA. The data allows for evaluation of neutron production process implemented in theoretical simulation codes. It also helps exploring the reasons for some disagreement between calculation results and shielding benchmark data...
Mary PW Chin
(European Spallation Source & CERN)
6/2/10, 11:30 AM
Source term and related topics
In a MW (p,xn) neutron facility GeV-range protons impinge a target where each proton generates an eventful history. As each history develops upstream towards downstream, the primary and subsequent secondaries penetrate the target and traverse the various components in the assembly (including the moderator and the reflector). Useful neutrons will survive and exit the beam line at the desired...
Anna Ferrari
(Institut für Sichereitsforschung and Institut für Strahlenphysik, Forschungszentrum Dresden-Rossendorf, Dresden, Germany)
6/2/10, 11:50 AM
Source term and related topics
In recent years the dramatic rise in attainable laser intensity has triggered a strong evolution of the research field, that is associated with the non-linear laser-matter interaction: production and acceleration of electrons up to 1 GeV over accelerating distances around 1 mm (to be compared to the 100 m, that are typical for conventional accelerators) are a visible result of this...
Anna Ferrari
(Institut für Sichereitsforschung and Institut für Strahlenphysik, Forschungszentrum Dresden-Rossendorf, Dresden, Germany)
6/2/10, 12:10 PM
Source term and related topics
The radiation source ELBE at Forschungszentrum Dresden-Rossendorf (FZD) uses a superconducting LINAC to produce high brillance electron beams, that can be delivered with energies up to 40 MeV, intensities up to 1 mA and within a pulse width of less then 10 ps. With these parameters the electron beam is used also to produce an intense neutron beam, by stopping the electrons in a liquid lead...
Dr
Nikolai Mokhov
(FERMILAB)
6/2/10, 2:00 PM
Source term and related topics
The next generation of accelerators for Mega-Watt proton and heavy-ion beams put unprecedented requirements on the accuracy of particle production predictions, the capability and reliability of the codes used in planning new accelerator facilities and experiments, the design of machine, target and collimation systems, detectors and radiation shielding and minimization of their impact on...
Paola Sala
(CERN)
6/2/10, 2:50 PM
Benchmarking - code/code and code/experimental data
Calculational tools for radiation shielding at accelerators are faced
with new challenges from the present and next generations of particle
accelerators. All the details of particle production and transport
play a role when dealing with huge power facilities, therapeutic ion
beams, radioactive beams, and so on. Besides the traditional calculations
required for shielding, activation...
Dr
Hiroshi Nakashima
(Japan Atomic Energy Agency)
6/2/10, 3:20 PM
Benchmarking - code/code and code/experimental data
Same problems at SATIF9 were used for inter-comparison mainly to compare between AGS experiments provided by H. Nakashima with various codes. As the new item to be sent by participants, “particles treated to obtain the results” is added,
This paper presents a comparison of the neutron attenuation length of iron and concrete sent to the organizer by the end of April, including results...
Hiroshi Nakashima
(Japan Atomic Energy Agency)
6/2/10, 3:40 PM
Benchmarking - code/code and code/experimental data
Experimental studies of shielding and radiation effects at Fermi National Accelerator Laboratory (FNAL) have been carried out under collaboration between FNAL and Japan, aiming at benchmarking of simulation codes and study of irradiation effects for upgrade and design of new high-energy accelerator facilities. The purposes of this collaboration are (1) acquisition of shielding data in a proton...
Vera Chetvertkova
(Goethe University, Frankfurt am Main; GSI, Darmstadt)
6/2/10, 4:30 PM
Benchmarking - code/code and code/experimental data
Present study is a continuation of the project "Verification of Monte-Carlo transport codes" which is running at GSI as a part of activation studies of FAIR relevant materials. It includes two parts: verification of stopping modules of FLUKA, MARS and SHIELD-A (with ATIMA stopping module) and verification of their isotope production modules. The first part is based on the measurements of...
Dr
Hiroshi Iwase
(KEK)
6/2/10, 4:50 PM
Benchmarking - code/code and code/experimental data
A shielding experiment using 243 and 387 MeV quasi-monoenergetic neutrons have been performed at the Research Center for Nuclear Physics (RCNP), Osaka University, Japan. Neutron energy spectra and doses behind concrete with 25, 50, 100, 200 and 300 cm thicknesses and iron with 10, 20, 40, 70, and 100 cm thicknesses have been measured. Two different sizes of NE213 liquid scintillators of 5" and...
Dr
Yoshitomo Uwamino
(RIKEN Nishina Center for Accelerator-Based Science)
6/2/10, 5:10 PM
Benchmarking - code/code and code/experimental data
RIKEN RIBF (Radioactive Isotope Beam Factory) is a big heavy-ion accelerator complex consists of a linac and five cyclotrons, of which last stage accelerator is a superconducting ring cyclotron (SRC). The maximum acceleration energy of it is 400 MeV/u for ions lighter than Ar and 350 MeV/u for heavier ions up to uranium. The accelerated beam is transported to BigRIPS (Big RIKEN...
Dr
jean-christophe david
(CEA-Saclay)
6/2/10, 5:30 PM
Benchmarking - code/code and code/experimental data
Spallation models have to be benchmarked in order to use the best one according the reactions studied and/or to know their reliabilities. Developments of spallation models are linked to experimental results and this explains why fifteen years ago a first benchmark has been launched, restricted to particle production, followed by a second one on residues. Since then new data have been measured...
Mr
Tatsuhiko Ogawa
(University of Tokyo)
6/2/10, 5:50 PM
Benchmarking - code/code and code/experimental data
Radioactive fragments induced in an iron target bombarded by 400 MeV/nucleon carbon ion beam were measured and compared with simulation carried out using Monte-Carlo radiation transport code FLUKA.
An iron target thicker than the stopping range of carbon ion beam was irradiated with a focused 400MeV/u carbon ion beam. After the irradiation, the iron target was disassembled to extract...
Dr
Franz Gallmeier
(ORNL)
6/3/10, 8:30 AM
Induced radioactivity
Accelerator activation analyses involve radionuclide production terms from two different branches of analyses, directly from event generators, indirectly by folding fluxes with activation cross sections, for particle types and energy ranges where activation cross sections exist. Advances have been made in the predictive power of event generators, and also in activation cross section data...
Dr
Roberto Versaci
(CERN)
6/3/10, 9:00 AM
Induced radioactivity
A new injector linac (Linac4) for the Proton Synchrotron Booster (PSB) is under construction at CERN.
H- ions will be accelerated to 160 MeV and stripped to protons at injection into the PSB.
A dump will be installed in the injection region to stop unstripped or partially stripped ions.
In order to select the best material for the core and optimize the design of the dump, Monte Carlo...
Dr
Ivan Strasik
(GSI Darmstadt, Germany)
6/3/10, 9:20 AM
Induced radioactivity
In the frame of the FAIR project (Facility for Antiprotons and Ion Research) residual activity induced by heavy ions was studied both experimentally and numerically using Monte Carlo particle-transport codes. In the present work we report on the validation of the transport codes FLUKA and SHIELD based on the measurements of the residual activity of copper and stainless steel targets irradiated...
Nikolaos Charitonidis
(CERN)
6/3/10, 9:40 AM
Induced radioactivity
Systematic Monte Carlo simulations with the FLUKA code were performed to estimate induced radioactivity in five materials commonly found in particle accelerator structures: boron nitride and carbon (dumps and collimators), copper (RF cavities, coils and vacuum pipes), iron and stainless steel (magnets and vacuum pipes). Using a simplified geometry set-up, the five materials were bombarded with...
Dana ENE
(ESS)
6/3/10, 10:00 AM
Induced radioactivity
Presently, the ESS project is in the update phase of the conceptual design that has been preliminary defined in 2003 through the joint efforts of several European countries.
According with the baseline of the ESS update design, the linac will deliver 5 MW of 2.5 GeV protons to a single target, in 2 ms long pulses with a 20 Hz repetition rate.
The material activation in such facility is an...
Dr
Daniela Kiselev
(Paul Scherrer Institut)
6/3/10, 10:50 AM
Induced radioactivity
The ring cyclotron at the Paul Scherrer Institute’s (PSI) accelerator facility produces at present protons of 590 MeV with a current of up to 2.3 mA. After penetrating two graphite targets with an effective thickness of 0.5 cm and 4 cm, the beam is dumped into the target of the neutron spallation source SINQ. This target consists of several rows of steel tubes (nowadays Zircaloy) filled with...
Ms
Stefania Trovati
(EPFL (Lausanne) - CERN)
6/3/10, 11:10 AM
Induced radioactivity
In a future beta-beam facility radioactive ions (6He and 18Ne) are produced, accelerated and then stored in a large Decay Ring (DR), where they eventually produce anti-neutrino and neutrino beams through β± decay. CERN is one of the candidate sites for the beta-beam facility, as existing machines like the Proton Synchrotron (PS) and the Super Proton Synchrotron (SPS) could be used for the...
Lucia Sarchiapone
(INFN)
6/3/10, 11:30 AM
Induced radioactivity
The SPES (Selective Production of Exotic Species) Project will be built at the National Laboratories in Legnaro (Italy) of the National Institute of Nuclear Physics (INFN). Its goal will be the development of radioactive ion beams and the consequent re-acceleration with the already existing Linac, to perform forefront research in the frame of nuclear physics. Radiation protection aspects play...
Ms
Sophie Mallows
(School of Physics and Astronomy Schuster Building-University of)
6/3/10, 11:50 AM
Induced radioactivity
The Compact Linear Collider (CLIC) study investigates the feasibility of a high-energy electron-positron linear collider optimized for a centre of mass energy of 3 TeV. The total tunnel length will be about 48 km, requiring the main linacs to operate at very high electric accelerating gradients of 100 MV/m. The RF power will be produced by a ‘two-beam acceleration method’ in which a high...
Mr
Yuriy Romanets
(Instituto Superior Tecnico (IST))
6/3/10, 12:10 PM
Induced radioactivity
The research with radioactive beams has strengthened the link between technical developments and physics output. The study of radioactive beams allows us to follow the evolution of nuclear structure over extended regions in the nuclear chart. Two different ways of producing radioactive beams, in-flight separation and the ISOL approach, can be combined with different post-processing of the...
Elias Lebbos
(CERN)
6/3/10, 2:00 PM
Induced radioactivity
The n_TOF facility, a spallation neutron source, uses a pure lead target for production of neutrons with a 20 GeV proton beam extracted from the CERN Proton Synchrotron (PS). After four years of operation and three years of cooling, from 2001 to 2007, the target assembly has been successfully removed. After a detailed analysis of the target status, the decision to substitute it with a new...
Georg Fehrenbacher
(GSI)
6/3/10, 2:50 PM
Medical and industrial accelerators
During last years the construction of clinical proton and ion accelerators for applications in tumour therapy makes great strides. Based on encouraging results for tumour treatments in particle therapy in the past more and more facilities are presently installed worldwide.
Due an enumeration of particle therapy facilities given by the PTCOG (Particle Therapy Cooperative Group) 44 facilities...
Prof.
Reinhold G. Mueller
(Univ. Erlangen DGMP; AAPM; DEGRO)
6/3/10, 3:20 PM
Medical and industrial accelerators
The construction company of Forster Ingenieurgesellschaft mbH has developed in cooperation with the University Erlangen-Nuremberg a process for the erection of radiation-shielded structures utilizing precast concrete components. About 50 bunkers were constructed using this sandwich technology during last three years. The core of the buildings is the filling material in-between the outer and...
Wolfgang Dittrich
(AREVA NP GmbH)
6/3/10, 3:40 PM
Medical and industrial accelerators
The German publicly available specification PAS1078 from Jan. 2008 provides rules for the construction of structural radiation protection in the case of medical accelerator facilities for proton therapy. The major points of PAS 1078 will be presented. Its methods for the estimation of shielding thicknesses will be compared with the results of Monte-Carlo calculations executed with MCNPX....
Dr
Frederic Stichelbaut
(Ion Beam Applications)
6/3/10, 4:30 PM
Medical and industrial accelerators
The IBA Company is the industry leader in proton therapy (PT) technology with seven PT centers treating patients every day in the USA and Asia and nine additional centers in construction and installation in the USA and in Europe.
IBA now develops a hadron therapy system that is complementary to its proton therapy systems. It is based on a K=1600 superconducting cyclotron delivering 400...
Dr
Koji Oishi
(Institute of Technology, Shimizu Corporation)
6/3/10, 4:50 PM
Medical and industrial accelerators
Recently electric linac oncology facilities incorporating seismic base-isolation structure have become very popular in Japan to prevent strong impact to the equipments by the earthquakes. When the boundary of the registered area is set below the base-isolated foundations, additional shielding of iron plate is needed and the cost for shielding increases up to $100M. Since no one usually...
Mr
Mauricio Garcia
(UNED)
6/3/10, 5:10 PM
Medical and industrial accelerators
IFMIF will be an accelerator-based neutron source to test candidate materials for nuclear fusion reactors. During the Engineering Validation and Design Activities (EVEDA) phase, a prototype accelerator (125 mA CW 9 MeV deuterons) will be tested in Rokkasho (Japan). As no target is foreseen for the accelerated beam during this phase, a beam dump is required to stop it during commissioning and...
Bernadette Kirk
(Oak Ridge National Laboratory)
6/4/10, 9:30 AM
Present status of data and code libraries
The Radiation Safety Information Computational Center (RSICC) and the Organization for Economic Cooperation and Development (OECD) Nuclear Energy Agency Data Bank (NEADB) work together to acquire sets of computer codes, nuclear data and integral experiments relevant to shielding and dosimetry applications for fission, fusion and accelerator applications. To keep up with advances in computing...
Dr
Jean-Christophe Sublet
(Culham Centre for Fusion Energy)
6/4/10, 10:00 AM
Present status of data and code libraries
The European Activation System (EASY) includes as the source of nuclear data the European Activation File (EAF) and as its engine the FISPACT activation-transmutation code. The latest version of the EAF, EAF-2010, contains cross section data for gamma-, deuteron- and proton-induced reactions in addition to the traditional neutron-induced data. The main reason for the addition of these data to...
Dr
Tatsumi Koi
(SLAC)
6/4/10, 10:50 AM
Present status of data and code libraries
Geant4 is a toolkit for the simulation of the passage of particles through matter. It is widely used in many domains including high energy physics, nuclear physics, astrophysics, space science and medical physics.
Members of the Geant4 hadronic working group have been involved in shielding calculations during the past four years, and have participated in the "Inter-comparison of Medium-Energy...
Dr
jean-christophe david
(CEA-Saclay)
6/4/10, 11:10 AM
Present status of data and code libraries
The two codes INCL4.2 (Intra-nuclear cascade) and Abla (deexcitation), combined to describe spallation reactions, have been improved in the last years. The main points were the light charged particle emission and IMF (Intermediate Mass Fragment) emission. The new versions, INCL4.5 and Abla07, give now good results in particular on tritium and helium production. An international benchmark,...
Mr
Javier Sanz Gozalo
(UNED)
6/4/10, 11:30 AM
Present status of data and code libraries
International fusion materials irradiation facility (IFMIF) is one of the three projects of the fusion broader approach between Japan and the European Union, planned to be performed in parallel of ITER project. The objective of IFMIF is to study the behaviour under irradiation of materials and components in conditions close to a nuclear fusion reactor. Engineering validation and engineering...
Dr
Tatsuhiko Sato
(Japan Atomic Energy Agency)
6/4/10, 2:00 PM
Dosimetry
Recent studies on the dosimetric issues will be reviewed at the meeting. The review will be given mainly on the following 3 topics:
(1) Calculation of the fluence to the dose conversion coefficients based on ICRP103
(2) Cosmic-ray dosimetry for aircrews and astronauts
(3) Development of dose monitors for high-energy neutron fields
Future requirements on dosimetric studies such as the...
Zuzana Zajacova
(Conseil Europeen Recherche Nucl. (CERN)-Unknown-Unknown)
6/4/10, 2:30 PM
Dosimetry
The ATLAS detector is installed at Point 1 of the Large Hadron Collider. The underground infrastructure consists of the experimental cavern UX15, which houses the detector, and two lateral service caverns, USA15 and US15. The experimental cavern is connected with the surface by two large vertical shafts, PX14 and PX16. Calculations were performed with the FLUKA code to assess the prompt...
Mr
Sasan Esmaili
(Azad University of SANANDAJ)
6/4/10, 2:50 PM
Dosimetry
Background: The British national radiological protection board (NRPB) introduced the use of diagnostic reference levels (DRLs) as an efficient standard for optimizing the radiation protection of patients. The physical parameter recommended for monitoring the (DRLs) in conventional radiography is the entrance skin dose (ESD) and methods for measuring it is clearly described in NRPB standard...
Marco Silari
(CERN)
6/4/10, 4:10 PM
