Session 2 - Induced radioactivity
- Stefan Roesler (CERN)
Dr Franz Gallmeier (ORNL)
6/3/10, 8:30 AM
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
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
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...
16. Neutron double differential distributions, dose rates and specific activities from accelerator components irradiated by 50 – 400 MeV protons
Nikolaos Charitonidis (CERN)
6/3/10, 9:40 AM
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
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
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...
30. Activation studies for a beta-beam Decay Ring (DR): residual dose rates during maintenance and airborne activity.
Ms Stefania Trovati (EPFL (Lausanne) - CERN)
6/3/10, 11:10 AM
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
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...
40. Estimates of Radiation Levels in the Main Linac Tunnel and Beam Dump Caverns for the CLIC Design Study
Ms Sophie Mallows (School of Physics and Astronomy Schuster Building-University of)
6/3/10, 11:50 AM
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
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
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...
6/3/10, 2:20 PM