Download or read book Germanium Detectors in Homeland Security at PNNL written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutron and gamma-ray detection is used for non-proliferation and national security applications. While lower energy resolution detectors such as NaI(Tl) have their place, high purity germanium (HPGe) also has a role to play. A detection with HPGe is often a characterization due to the very high energy resolution. However, HPGe crystals remain small and expensive leaving arrays of smaller crystals as an excellent solution. PNNL has developed two similar HPGe arrays for two very different applications. One array, the Multisensor Aerial Radiation Survey (MARS) detector is a fieldable array that has been tested on trucks, boats, and helicopters. The CASCADES HPGe array is an array designed to assay samples in a low background environment. The history of HPGe arrays at PNNL and the development of MARS and CASCADES will be detailed in this paper along with some of the other applications of HPGe at PNNL.

Download or read book PNNL Radiation Detection for Nuclear Security Summer School written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: PNNL's Radiation Detection for Nuclear Security Summer School gives graduate and advanced graduate students an understanding of how radiation detectors are used in national security missions.

Download or read book Making Appropriations for Energy and Water Development for the Fiscal Year Ending September 30 2006 and for Other Purposes written by United States. Congress and published by . This book was released on 2005 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Mechanically Cooled High Purity Germanium HPGe Detectors at Elevated Temperatures written by Joseph Benjamin McCabe and published by . This book was released on 2015 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: High resolution gamma spectroscopy is a tool used in nuclear security applications due to its achievable energy resolution and associated ability to identify special nuclear material. This identification ability is achieved by identifying the characteristic gamma-rays of a material. The challenges that have confronted industry concerning the use of hand-held high purity germanium (HPGe) in homeland security applications have centered on weight, geometry, and cool-down time. Typical liquid nitrogen cooled detectors ranging in size from 10% to 150% detectors will cool down sufficiently within 2-6 hours of filling. The cool-down time achieved in this research ranges from 45 min on the smallest detector to six hours on the largest 180 cm3 detector; which is consistent with typical hand held HPGe devices. The weight and package geometry for HPGe-based designs is driven by the need to cool the HPGe detector to cryogenic temperatures. This is due to small bandgap (~0.7 eV) of HPGe. Liquid nitrogen or mechanical cooling is required to achieve such temperatures. This dissertation presents work performed to characterize energy resolution performance as a function of temperature in a new mechanically cooled HPGe detector design based upon a split-Stirling cryocooler. This research also quantifies the microphonic noise contribution from this cryocooler. Measurements have been taken on detector sizes ranging from 6.75 cubic centimeters to 180 cubic centimeters. Focus has been placed on determining volume dependence on energy resolution at elevated temperatures. Microphonic noise contribution from the cooler has also been studied over the same temperature range. This energy resolution degradation was most pronounced at low temperatures (

Download or read book Energy and water development appropriations bill 2006 written by United States. Congress. House. Committee on Appropriations and published by . This book was released on 2005 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of Homeland Security Appropriations for 2009 Part 3 110 2 Hearings written by and published by . This book was released on 2008 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy and Water Development Appropriations Bill 2006 written by United States. Congress. House. Committee on Appropriations and published by DIANE Publishing. This book was released on 2005 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Project on Nuclear Issues written by Stephanie Spies and published by Rowman & Littlefield. This book was released on 2013-07-11 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Center for Strategic and International Studies launched the Project on Nuclear Issues (PONI) in 2003 in order to revitalize and strengthen a community of nuclear weapons experts whose training and background increasingly emphasize multidisciplinary expertise, especially among younger generations. In support of this goal, the PONI conference series was created to provide a forum for facilitating new and innovative thinking on how to address the evolving role of nuclear weapons in international security and to gather people from across the policy and technical communities to discuss key issues. The 2012 conference series included events at Pacific Northwest National Laboratory in April, Los Alamos National Laboratory in June, and the Center for Strategic and International Studies in October, before concluding with a Capstone Conference at Offutt Air Force Base, home of the U.S. Strategic Command, in March. The papers included in this volume are a collection of some of the presentations delivered at the Capstone Conference. Spanning a wide range of technical and policy issues, these selected papers hope to further discussion in their respective areas, as well as contribute to the success of the greater nuclear community.

Download or read book Department of Homeland Security Appropriations for 2009 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Homeland Security and published by . This book was released on 2008 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reviews Of Accelerator Science And Technology Volume 8 Accelerator Applications In Energy And Security written by Alexander Wu Chao and published by World Scientific. This book was released on 2016-03-04 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: As accelerator science and technology progressed over the past several decades, the accelerators themselves have undergone major improvements in multiple performance factors: beam energy, beam power, and beam brightness. As a consequence, accelerators have found applications in a wide range of fields in our life and in our society. The current volume is dedicated to applications in energy and security, two of the most important and urgent topics in today's world.This volume makes an effort to provide a review as complete and up to date as possible of this broad and challenging subject. It contains overviews on each of the two topics and a series of articles for in-depth discussions including heavy ion accelerator driven inertial fusion, linear accelerator-based ADS systems, circular accelerator-based ADS systems, accelerator-reactor interface, accelerators for fusion material testing, cargo inspection, proton radiography, compact neutron generators and detectors. It also has a review article on accelerator science and technology in Canada with a focus on the TRIUMF laboratory, and an article on the life of Bruno Touschek, a renowned accelerator physicist.

Download or read book 2004 IEEE Nuclear Science Symposium Conference Record written by and published by . This book was released on 2004 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Topical Workshop on Low Radioactivity Techniques written by Bruce Cleveland and published by American Institute of Physics. This book was released on 2005-09-21 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This workshop examined the state-of-the-art of all techniques for measuring radioactivity at ultra-low activity levels as well as all aspects of the development of low-background detectors. Such detectors are needed to study physical processes that can only be observed when all sources of interfering background are reduced to a very low level. These techniques are essential to develop next generation detectors for neutrino research, solar neutrino physics, and neutrino astrophysics, as well as measurement of the double beta-decay process and the search for dark matter in the universe. Topics covered include experimental radio-purity requirements, methods for shielding detectors from cosmic rays and local radioactivity, methods for the measurement of impurities in bulk materials, in gases, and on surfaces, techniques for materials purification, and related subjects. The workshop marked the beginning of excavation for the new international facility for deep underground particle astrophysics (SNOLAB), located in Sudbury, Canada.

Download or read book Critical Materials Strategy written by Steven Chu and published by DIANE Publishing. This book was released on 2011-05 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report examines the role of rare earth metals and other materials in the clean energy economy. It was prepared by the U.S. Department of Energy (DoE) based on data collected and research performed during 2010. In the report, DoE describes plans to: (1) develop its first integrated research agenda addressing critical materials, building on three technical workshops convened by the DoE during November and December 2010; (2) strengthen its capacity for information-gathering on this topic; and (3) work closely with international partners, including Japan and Europe, to reduce vulnerability to supply disruptions and address critical material needs. Charts and tables. This is a print on demand report.

Download or read book Energy and Water Development Appropriations for 2011 Part 3 February 2010 111 2 Hearings written by and published by . This book was released on 2010 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Keeping America Secure Serial No 112 97 July 19 2012 112 2 Hearing written by and published by . This book was released on 2013 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy and Water Development Appropriations for 2011 Dept of Energy fiscal year 2011 justifications cont written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 2010 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lithium Metal Anodes and Rechargeable Lithium Metal Batteries written by Ji-Guang Zhang and published by Springer. This book was released on 2016-10-06 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides comprehensive coverage of Lithium (Li) metal anodes for rechargeable batteries. Li is an ideal anode material for rechargeable batteries due to its extremely high theoretical specific capacity (3860 mAh g-1), low density (0.59 g cm-3), and the lowest negative electrochemical potential (−3.040 V vs. standard hydrogenelectrodes). Unfortunately, uncontrollable dendritic Li growth and limited Coulombic efficiency during Li deposition/stripping inherent in these batteries have prevented their practical applications over the past 40 years. With the emergence of post Liion batteries, safe and efficient operation of Li metal anodes has become an enabling technology which may determine the fate of several promising candidates for the next generation energy storage systems, including rechargeable Li-air batteries, Li-S batteries, and Li metal batteries which utilize intercalation compounds as cathodes. In this work, various factors that affect the morphology and Coulombic efficiency of Li anodes are analyzed. The authors also present the technologies utilized to characterize the morphology of Li deposition and the results obtained by modeling of Li dendrite growth. Finally, recent developments, especially the new approaches that enable safe and efficient operation of Li metal anodes at high current densities are reviewed. The urgent need and perspectives in this field are also discussed. The fundamental understanding and approaches presented in this work will be critical for the applicationof Li metal anodes. The general principles and approaches can also be used in other metal electrodes and general electrochemical deposition of metal films.