The Advanced Photon Source (APS) currently under construction at Argonne National Laboratory will be one of the world’s brightest synchrotron radiation facilities. The storage ring, capable of storing currents up to 300 mA at 7.0 GeV and 200 mA at 7.5 GeV, will produce very intense and energetic synchrotron radiation (Ec = 24 keV for bending magnets and Ec = 37.4 keV for wigglers, where Ec is t...

Several studies have demonstrated detrimental effects of cellular phone radiation on in-vitro biological systems. This article introduces a novel in-vitro method for demonstrating conformational changes in human DNA induced by a 5 minute exposure to cellular phone radiation emitted by an actual contemporary cellular phone. Dynamic changes in DNA conformation was determined in real-time by measu...

This paper presents a method for performing diagnostic x-ray shielding calculations which is somewhat different than that given in NCRP Report No. 49. The method computes exposure at the location to be shielded from multiple sources of radiation in the room and accounts for differences in transmission characteristics of leakage and primary/scatter radiation. Also discussed in the paper is a met...

Introduction In December 2003 GSI was given the first step of approval by the Hesse Ministry for environment to build the new international accelerator facility for beams of ions and antiprotons [1]. This approval was passed after the assessment by the radiation protection experts TÜV [2]. In order to meet the requirements to build the facilities for the FAIR project [3] shielding calculations ...

INTRODUCTION The NCRP 49 (1976) (1) standard presents a methodology to determine protective shielding for diagnostic and therapeutic X-ray rooms. This methodology has been reviewed by several authors in the recent years (2). This work presents contributions for this new shielding evaluation method, taking into account information regarding patient attenuation and scattering, as well as workload...

Leakage radiation and room shielding considerations increase significantly for intensity-modulated radiation therapy (IMRT) treatments due to the increased beam-on time to deliver modulated fields. Tomotherapy, with its slice by slice approach to IMRT, further exacerbates this increase. Accordingly, additional shielding is used in tomotherapy machines to reduce unwanted radiation. The competing...

This paper describes a measuring procedure for the determination of shielding factors for vehicles passing through areas that have been contaminated by activity released to the atmosphere from a reactor accident. In open areas the radiation field arises from an infinite plane source. In urban areas the radiation field consists of the contribution from fallout deposited on a road and on the buil...

This study investigates the characteristics of prompt radiation field and some issues of induced activities due to the operation of the Taiwan Photon Source (TPS). Starting from assumed beam loss scenarios and using the FLUKA Monte Carlo simulations, energy spectra and dose distributions of the prompt radiation field for its shielding design were studied. Radiation environment around the penetr...

High atomic number and high-energy (HZE) particles in deep space are of low abundance but substantially contribute to the biological effects of space radiation. Shielding is so far the most effective way to partially protect astronauts from these highly penetrating particles. However, simulated calculations and measurements have predicted that secondary particles resulting from the shielding of...

The purpose of this experiment is to understand the interaction of radiation and matter, and the application to radiation detection and shielding. The inverse square law of the distance is demonstrated with the gamma radiation from Co 60 preparation, the halfvalue thickness and absorption coefficient of various materials determined with the narrow beam system and the corresponding mass attenuat...