Download or read book Study of the Anatomy of the X Ray and Neutron Production Scaling Laws in the Plasma Focus Particle Energy Spectrum and Optimization Criteria written by V. Nardi and published by . This book was released on 1978 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma focus discharges were used to generate high-intensity deuteron beams about 10 to the 5th power Amp) with about or> 300-keV-peaked spectrum and electron beams, with an energy distribution similarly peaked at 300-400 keV. The energy spectrum is determined by two independent methods (time of flight and target-damage data). The spectrum varies from shot to shot but the main features are observed in all discharges. In each discharge we observe on a time interval of 100-300 nanosec a sequence of beam pulses (1-10), with the same multiplicity of the peaks in the electrode-current variations. Correlation coefficients between x-ray and neutron yield in D2 discharges and beam parameters have been determined by a variety of conditions for the PF (bank voltage, filling pressure, circuit inductance). The power level of both ions and electron beam is about 0.1-1TW/sq cm. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1981 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Fusion Energy Update written by and published by . This book was released on 1981 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1980 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Physics Index written by and published by . This book was released on 1981 with total page 834 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1980 with total page 1414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correlation of Neutron Production to X rays and Visible Light in a Dense Plasma Focus written by Craig M. Lee (1LT, USAF.) and published by . This book was released on 1971 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Basic physical phenomena neutron production and scaling of the dense plasma focus written by Hans J. Kaeppeler and published by . This book was released on 1977 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1991 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studying High Energy Density Plasmas Using Three dimensional Neutron Spectroscopy written by Owen M. Mannion and published by . This book was released on 2021 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A suite of 3D neutron time of flight (nTOF) detectors was deployed on the 60-beam, 30-kJ, 351-nm OMEGA laser and was used to study a variety of high energy density (HED) inertial confinement fusion (ICF) experiments. Measurements of the primary deuterium-tritium (DT) and deuterium-deuterium (DD) neutron energy spectrum were made during DT cryogenic and gas-filled capsule laser direct-drive ICF implosion experiments, and the hot-spot plasma velocity, apparent ion temperature, and Gamow shift were inferred. Measurements of the scattered neutron energy spectrum in cryogenic ICF experiments were used to infer the compressed DT fuel layer's temperature, velocity, and areal density. The hot-spot velocity (~uhs), apparent ion temperature (Ti), and areal-density (pR) measurements were used to diagnose mode-one drive asymmetries in laser direct-drive implosions for the first time. Implosions with significant mode-one asymmetries were found to have large hot-spot velocities (>100 km/s) in a direction consistent with the hot-spot elongation observed in x-ray images, measured Ti asymmetry, and pR asymmetry. A novel mode one drive correction technique was developed and successfully used to correct mode-one drive asymmetries. When mode-one drive asymmetries are eliminated, more symmetric hot spots are observed with reduced ~uhs, Ti asymmetry, pR asymmetry, and increased fusion yield. The areal density, mean velocity, and temperature of the dense fuel layer were measured and used to study the residual kinetic energy in the shell. The mean velocity of the dense fuel layer was measured to be ~80 km/s for all implosion designs, while the apparent ion temperature of the dense fuel layer was observed to increase with the implosion velocity from 0.6-2.4 keV. The significant increase in the apparent temperature of the dense fuel layer with implosion velocity suggests an increase in the residual kinetic energy (RKE) of the shell with implosion velocity. These results are shown to be consistent with enhanced levels of shell decompression for high implosion velocity experiments. The Gamow shift and apparent ion temperature measurements were used to study the plasma ion velocity distribution in hydrodynamic and kinetic plasmas. The relationship between the plasma Gamow shift and apparent ion temperature was inconsistent with a Maxwellian plasma model for the most kinetic-like plasmas. The measurements from the kinetic like plasma were consistent with predictions from Vlasov-Fokker-Planck (VPF) simulations, which predict the presence of non-Maxwellian ion velocity distributions in the hot spot at peak neutron production. These data provide the first experimental evidence of non-Maxwellian ion distributions modifying the neutron spectra in ICF experiments."--Pages xv-xvi.
Download or read book Proton Therapy Physics written by Harald Paganetti and published by CRC Press. This book was released on 2016-04-19 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton Therapy Physics goes beyond current books on proton therapy to provide an in-depth overview of the physics aspects of this radiation therapy modality, eliminating the need to dig through information scattered in the medical physics literature. After tracing the history of proton therapy, the book summarizes the atomic and nuclear physics background necessary for understanding proton interactions with tissue. It describes the physics of proton accelerators, the parameters of clinical proton beams, and the mechanisms to generate a conformal dose distribution in a patient. The text then covers detector systems and measuring techniques for reference dosimetry, outlines basic quality assurance and commissioning guidelines, and gives examples of Monte Carlo simulations in proton therapy. The book moves on to discussions of treatment planning for single- and multiple-field uniform doses, dose calculation concepts and algorithms, and precision and uncertainties for nonmoving and moving targets. It also examines computerized treatment plan optimization, methods for in vivo dose or beam range verification, the safety of patients and operating personnel, and the biological implications of using protons from a physics perspective. The final chapter illustrates the use of risk models for common tissue complications in treatment optimization. Along with exploring quality assurance issues and biological considerations, this practical guide collects the latest clinical studies on the use of protons in treatment planning and radiation monitoring. Suitable for both newcomers in medical physics and more seasoned specialists in radiation oncology, the book helps readers understand the uncertainties and limitations of precisely shaped dose distribution.
Download or read book Plasma Physics and Controlled Nuclear Fusion Research written by and published by . This book was released on 1981 with total page 890 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory of X ray and Thermal neutron Scattering by Real Crystals written by Mikhail Aleksandrovich Krivoglaz and published by Springer. This book was released on 1969 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Visualizing Chemistry written by National Research Council and published by National Academies Press. This book was released on 2006-06-01 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists and engineers have long relied on the power of imaging techniques to help see objects invisible to the naked eye, and thus, to advance scientific knowledge. These experts are constantly pushing the limits of technology in pursuit of chemical imagingâ€"the ability to visualize molecular structures and chemical composition in time and space as actual events unfoldâ€"from the smallest dimension of a biological system to the widest expanse of a distant galaxy. Chemical imaging has a variety of applications for almost every facet of our daily lives, ranging from medical diagnosis and treatment to the study and design of material properties in new products. In addition to highlighting advances in chemical imaging that could have the greatest impact on critical problems in science and technology, Visualizing Chemistry reviews the current state of chemical imaging technology, identifies promising future developments and their applications, and suggests a research and educational agenda to enable breakthrough improvements.
Download or read book Conference Papers Index written by and published by . This book was released on 1988 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: Monthly. Papers presented at recent meeting held all over the world by scientific, technical, engineering and medical groups. Sources are meeting programs and abstract publications, as well as questionnaires. Arranged under 17 subject sections, 7 of direct interest to the life scientist. Full programs of meetings listed under sections. Entry gives citation number, paper title, name, mailing address, and any ordering number assigned. Quarterly and annual indexes to subjects, authors, and programs (not available in monthly issues).
Download or read book Physics in Nuclear Medicine written by Simon R. Cherry and published by . This book was released on 2003 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, the authors provide up-to-date, comprehensive information on the physics underlying modern nuclear medicine and imaging using radioactively labelled tracers. Examples are presented with solutions worked out in step-by-step detail, illustrating important concepts and calculations.
