نتایج جستجو برای: shielding tools

تعداد نتایج: 274760  

2001
W. Yun B. Lai K. J. Randall S. Davey D. R. Haeffner

The radiation shielding for an Advanced Photon Source (APS) insertion device beamline using a mirror as the first optical component is discussed. The beamline layout for a specific Synchrotron Radiation Instrumentation Collaborative Access Team beamline (sector 2 of SRI CAT) is described, and the methodology used to determine the radiation shielding is presented. Results indicate that, by using...

2013
YAJUN XU

In this paper, an efficient technique based on modal method of moments (MoM) is presented, the influence of apertures’ shape and calculation point of SE on electromagnetic shielding effectiveness has been studied. A very good agreement among the simulation results of the proposed technique, results available in the literature and experimental results is observed. The results of the present anal...

Journal: :Health physics 1995
J W Wilson M Kim W Schimmerling F F Badavi S A Thibeault F A Cucinotta J L Shinn R Kiefer

When shielding from cosmic heavy ions, one is faced with limited knowledge about the physical properties and biological responses of these radiations. Herein, the current status of space shielding technology and its impact on radiation health is discussed in terms of conventional protection practice and a test biological response model. The impact of biological response on optimum materials sel...

2011
Florian Senn Matija Zlatar Maja Gruden-Pavlovic Claude Daul

The ligand-field density functional theory (LFDFT) approach is employed for calculations of the Co nuclear magnetic resonance (NMR) shielding tensor of all four diastereoisomers (kkk, kkd, kdd, and ddd) of tris(1,2ethanediamine) cobalt(III) complex ion, [Co(en)3] . The obtained values split into two groups according to the point group of the diastereoisomers. The influence of the individual rin...

2011
G. Fehrenbacher T. Radon

Shielding data are necessary for the architectural planning of ion accelerator facilities. In the present case the main radiation component is neutron radiation. For the architectural planning in advance it is necessary to give a rough cost quotation for the shielding measures. In an early stage of a project rapid methods for the calculation of shielding thicknesses are required. Line-of-sight ...

Journal: :International journal of occupational safety and ergonomics : JOSE 2006
Rosaria Falsaperla Giuseppe Spagnoli Paolo Rossi

Basic principles of reducing exposure to electromagnetic fields are reviewed in this article. Measures to reduce exposure can be divided into organisational/administrative and technical/engineering actions. Both strategies are briefly analysed and the basic principles of the theory of shielding are presented. A definition of shielding effectiveness (SE) is given, and the results from the genera...

2011
C. Morari I. Balan J. Pintea E. Chitanu I. Iordache

There is increasing interest in electromagnetic interference (EMI) shielding due to the serious electromagnetic environment pollution caused by the continuously increased use of the electrical products and electronic devices. Electrical conductivity and EMI shielding effectiveness (SE) of composite materials made from silicone rubber with carbon powder and ferrite powder have been studied in mi...

2011
R. QIU J. C. LIU S. H. ROKNI A. A. PRINZ

LCLS Matter in Extreme Conditions (MEC) Instrument is an X-ray instrument that will be able to create and diagnose High Energy Density (HED) matter. The MEC laser system can generate hard X-ray due to the interaction of the laser and the plasma. This paper summarizes results of the shielding calculations performed to evaluate the radiation hazards induced by this hard X-ray source with Monte Ca...

Journal: :Journal of radiological protection : official journal of the Society for Radiological Protection 2016
Zivile Valuckiene Martynas Jurenas Inga Cibulskaite

Ionizing radiation management is among the most important safety issues in interventional cardiology. Multiple radiation protection measures allow the minimization of x-ray exposure during interventional procedures. Our purpose was to assess the utilization and effectiveness of radiation protection and optimization techniques among interventional cardiologists in Lithuania. Interventional cardi...

2002
R. K. Tripathi J. W. Wilson F. A. Cucinotta B. M. Anderson L. C. Simonsen

The great cost of added radiation shielding is a potential limiting factor in many deep space missions. For this enabling technology, we are developing tools for optimized shield design over multi-segmented missions involving multiple work and living areas in the transport and duty phase of various space missions. The total shield mass over all pieces of equipment and habitats is optimized subj...

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