Characterization of Graphene Stripper Foils in 11-MeV Cyclotrons
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Sergey Korenev, Rick Dishman, Alberto Yebra, Nikolay Meshcheryakov, Ilya Smirnov, Igor Pavlovsky, Richard Fink An experimental study of the use of graphene as an extractor (stripper) foil in the 11-MeV Siemens Eclipse Cyclotron is discussed in this paper. The main advantage of graphene is its high thermal conductivity compared to that of amorphous carbon films. Graphene also has significant mechanical strength. The lifetime of the graphene foils under proton bombardment exceeded 16,000μAh. Graphene-based stripper foils demonstrated a significant...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
FEPE Calibration of a HPGe Detector Using Radioactive Sphere Source
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Mahmoud I. Abbas The calibration of hyper pure germanium detectors is required to calculate the activity of radioactive sources. To determine the activity, the detector full-energy peak (photopeak) efficiency is required. The full–energy peak efficiency gamma-ray HPGe detector for spherical sources is obtained by the use of direct analytical expressions. In addition, the source self-absorption and its effect on the full–energy peak efficiency has been studied. (Source: Physics Procedia)
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Accelerated Learning: Undergraduate Research Experiences at the Texas A & amp;M Cyclotron Institute
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): S.J. Yennello The Texas A&M Cyclotron Institute (TAMU CI) has had an NSF funded Research Experiences for Undergraduates program since 2004. Each summer about a dozen students from across the country join us for the 10-week program. They are each imbedded in one of the research groups of the TAMU CI and given their own research project. While the main focus of their effort is their individual research project, we also have other activities to broaden their experience. For instance, one of those activities has been involvement in a dedicated grou...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Undergraduate Research and Training in Ion-Beam Analysis of Environmental Materials
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Michael F. Vineyard, Sajju Chalise, Morgan L. Clark, Scott M. LaBrake, Andrew M. McCalmont, Brendan C. McGuire, Iseinie I. Mendez, Heather C. Watson, Joshua T. Yoskowitz We have an active undergraduate research program at the Union College Ion-Beam Analysis Laboratory (UCIBAL) focused on the study of environmental materials. Accelerator-based ion-beam analysis (IBA) is a powerful tool for the study of environmental pollution because it can provide information on a broad range of elements with high sensitivity and low detection limits, is non-de...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
RBS Study of a Dilute Alloy of Ga(99.8% at.):Bi(0.2% at.)
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Randolph S. Peterson, Carlyn N. Augustine, Griffin G. Beriont, Aidan T. Farr, William T.J. Jenkins, Taylor A. Morris, Charles F. Morrow, Daniel Rosales Giron, Joel L. Stewart, Charles Wahlert, Jack E. Manuel, Gary A. Glass, Duncan L. Weathers Dilute alloys of bismuth in gallium (98-99% at.) are known from theoretical calculations and x-ray scattering to display a strong segregation of bismuth atoms at the surface, a monatomic layer of bismuth appearing because of the lower surface tension of the Bi compared to the Ga. Rutherford backscatter...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Physics in “Real Life”: Accelerator-based Research with Undergraduates
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): J.L. Klay All undergraduates in physics and astronomy should have access to significant research experiences. When given the opportunity to tackle challenging open-ended problems outside the classroom, students build their problem-solving skills in ways that better prepare them for the workplace or future research in graduate school. Accelerator-based research on fundamental nuclear and particle physics can provide a myriad of opportunities for undergraduate involvement in hardware and software development as well as “big data” analysis. The collab...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Opportunities for Undergraduate Research in Nuclear Physics
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): S.F. Hicks, T.D. Nguyen, D.T. Jackson, S.G. Block, S.T. Byrd, M.T. Nickel, J.R. Vanhoy, E.E. Peters, A.P.D. Ramirez, M.T. McEllistrem, S. Mukhopadhyay, S.W. Yates University of Dallas (UD) physics majors are offered a variety of undergraduate research opportunities in nuclear physics through an established program at the University of Kentucky Accelerator Laboratory (UKAL). The 7-MV Model CN Van de Graaff accelerator and the neutron production and detection facilities located there are used by UD students to investigate how neutrons scatter ...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Identification and Imaging of Special Nuclear Materials and Contraband using Active x-ray Interrogation
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Seth Van Liew, William Bertozzi, Nathan D’Olympia, Wilbur A. Franklin, Stephen E. Korbly, Robert J. Ledoux, Cody M. Wilson A x-ray inspection system utilizing a continuous-wave 9 MeV rhodotron x-ray source for scanning cargo containers is presented. This system scans for contraband, anomalies, stowaway passengers, and nuclear threats for trucks and towed cargo containers. A transmission image is generated concurrently with a 3D image of the cargo, the latter presenting material information in the form of atomic number and density. Neutrons from...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Verification of Plutonium Content in PuBe Sources Using MCNP ® 6.2.0 Beta with TENDL 2012 Libraries
In this study, three sets of PuBe sources from various backgrounds were modeled in MCNP6 1.2 Beta, according to the source specifications dictated by the individuals who assayed the source. Verification of the source parameters with MCNP6 also serves as a means to test the alpha transport capabilities of MCNP6 1.2 Beta with TENDL 2012 alpha transport libraries. Good agreement in the comparison would indicate the accuracy of the source parameters in addition to demonstrating MCNP's capabilities in simulating (α, n) interactions. (Source: Physics Procedia)
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Effective Atomic Number, Mass Attenuation Coefficient Parameterization, and Implications for High-Energy X-Ray Cargo Inspection Systems
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Willem G.J. Langeveld The most widely used technology for the non-intrusive active inspection of cargo containers and trucks is x-ray radiography at high energies (4-9 MeV). Technologies such as dual-energy imaging, spectroscopy, and statistical waveform analysis can be used to estimate the effective atomic number (Z eff ) of the cargo from the x-ray transmission data, because the mass attenuation coefficient depends on energy as well as atomic number Z. The estimated effective atomic number, Z eff , of the cargo then leads to improved detection capabi...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
New Developments in Scintillators for Security Applications
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Jarek Glodo, Yimin Wang, Ryan Shawgo, Charles Brecher, Rastgo H. Hawrami, Joshua Tower, Kanai S. Shah Radiation is an important part of security space: It is detected either passively in search of special nuclear materials or actively to monitor or interrogate objects of interest. Systems relying on radiation require adequate detectors. The most common radiation detectors are based on scintillating materials that convert hard (gamma, x-ray or neutron) radiation into visible light registered by a photodetector. The last decade has seen development...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Detection System of the First Rapidly Relocatable Tagged Neutron Inspection System (RRTNIS), Developed in the Framework of the European H2020 C-BORD Project
We report on the status of the RRTNIS system, in particular the overall design, the characterization of the large-volume NaI(Tl) gamma detectors, the digital analysis of the time measurements and the Data Acquisition System (DAQ). (Source: Physics Procedia)
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
A Distributed Data Acquisition System for the Sensor Network of the TAWARA_RTM Project
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Cristiano Lino Fontana, Massimiliano Donati, Davide Cester, Luca Fanucci, Alessandro Iovene, Lukasz Swiderski, Sandra Moretto, Marek Moszynski, Anna Olejnik, Alessio Ruiu, Luca Stevanato, Tadeusz Batsch, Carlo Tintori, Marcello Lunardon This paper describes a distributed Data Acquisition System (DAQ) developed for the TAWARA_RTM project (TAp WAter RAdioactivity Real Time Monitor). The aim is detecting the presence of radioactive contaminants in drinking water; in order to prevent deliberate or accidental threats. Employing a set of detecto...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Detectors for Active Interrogation Applications
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): S.D. Clarke, M.C. Hamel, M.M. Bourne, S.A. Pozzi Active interrogation creates an environment that is particularly challenging from a radiation-detection standpoint: the elevated background levels from the source can mask the desired signatures from the SNM. Neutron based interrogation experiments have shown that nanosecond-level timing is required to discriminate induced-fission neutrons from the scattered source neutrons. Previous experiments using high-energy bremsstrahlung X-rays have demonstrated the ability to induce and detect prompt photofiss...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
Geant4 Modifications for Accurate Fission Simulations
Publication date: 2017 Source:Physics Procedia, Volume 90 Author(s): Jiawei Tan, Joseph Bendahan Monte Carlo is one of the methods to simulate the generation and transport of radiation through matter. The most widely used radiation simulation codes are MCNP and Geant4. The simulation of fission production and transport by MCNP has been thoroughly benchmarked. There is an increasing number of users that prefer using Geant4 due to the flexibility of adding features. However, it has been found that Geant4 does not have the proper fission-production cross sections and does not produce the correct fission products. To achie...
Source: Physics Procedia - October 26, 2017 Category: Physics Source Type: research
