Download or read book Design and Implementation of Dilation X ray Imager for National Ignition Facility DIXI written by and published by . This book was released on 2013 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Implementation of Dilation X ray Imager for NIF DIXI written by and published by . This book was released on 2013 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dilation X ray Imager a New faster Gated X ray Imager for the NIF DIXI Dilation X ray Imager a New faster Gated X ray Imager for the NIF written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As the yield on implosion shots increases it is expected that the peak x-ray emission reduces to a duration with a FWHM as short as 20 ps for 7̃ 1018 neutron yield. However, the temporal resolution of currently used gated x-ray imagers on the NIF is 40-100 ps. We discuss the benefits of the higher temporal resolution for the NIF and present performance measurements for DIXI, which utilizes pulse-dilation technology [1] to achieve x-ray imaging with temporal gate times below 10 ps. Lastly, the measurements were conducted using the COMET laser, which is part of the Jupiter Laser Facility at the Lawrence Livermore National Laboratory.

Download or read book Performance Measurements of the DIXI dilation X ray Imager Photocathode Using a Laser Produced X ray Source written by and published by . This book was released on 2012 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ignition X Ray Imager for Laser Fusion Research at the National Ignition Facility written by T. W. Phillips and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray imaging will be an important diagnostic tool for inertial confinement fusion (ICF) research at the National Ignition Facility (NIF). However, high neutron yields will make x-ray imaging much more difficult than it is at current smaller facilities. We analyze the feasibility and performance of an Ignition X-Ray Imager to be used on cryogenic DT implosions at NIF. The system is intended to provide time-integrated, broadband, moderate-energy x-ray core images of imploding ICF capsules. Highly magnified, spectrally-filtered images created using an array of pinholes placed close to the target will be projected onto a scintillator placed at the target chamber wall. A telescope will be used to relay the scintillator emission to a distant optical detector that is time-gated in order to minimize backgrounds, in particular from neutrons. The system is optimized with respect to spatial-resolution, signal-to-background and signal-to-noise ratios.

Download or read book Time resolved Soft X Ray Imaging SXRI Diagnostic for Use at the NIF and OMEGA Lasers written by G. Power and published by . This book was released on 2006 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soft x-ray imager (SXRI) built for the first experiments at the National Ignition Facility (NIF) has four soft x-ray channels and one hard x-ray channel. The SXRI is a snout that mounts to a four strip gated imager. This produces four soft x-ray images per strip, which can be separated in time by {approx}60psec. Each soft x-ray channel consists of a mirror plus a filter. The diagnostic was used to study x-ray burnthrough of hot hohlraum targets at the NIF and OMEGA lasers. The SXRI snout design and issues involved in selecting the desired soft x-ray channels are discussed.

Download or read book Hard X ray Imaging for Measuring Laser Absorption Spatial Profiles on the National Ignition Facility written by R. E. Turner and published by . This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hard x-ray (''Thin wall'') imaging will be employed on the National Ignition Facility (NIF) to spatially locate laser beam energy deposition regions on the hohlraum walls in indirect drive Inertial Confinement Fusion (ICF) experiments, relevant for ICF symmetry tuning. Based on time resolved imaging of the hard x-ray emission of the laser spots, this method will be used to infer hohlraum wall motion due to x-ray and laser ablation and any beam refraction caused by plasma density gradients. In optimizing this measurement, issues that have to be addressed are hard x-ray visibility during the entire ignition laser pulse with intensities ranging from 10{sup 13} to 10{sup 15} W/cm{sup 2}, as well as simultaneous visibility of the inner and the outer laser drive cones. In this work we will compare the hard x-ray emission calculated by LASNEX and analytical modeling with thin wall imaging data recorded previously on Omega and during the first hohlraum experiments on NIF. Based on these calculations and comparisons the thin wall imaging will be optimized for ICF/NIF experiments.

Download or read book X ray Imaging in an Environment with High neutron Background on National Ignition Facility written by and published by . This book was released on 2011 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Standard Design for National Ignition Facility X Ray Streak and Framing Cameras written by and published by . This book was released on 2010 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The x-ray streak camera and x-ray framing camera for the National Ignition Facility were redesigned to improve electromagnetic pulse hardening, protect high voltage circuits from pressure transients, and maximize the use of common parts and operational software. Both instruments use the same PC104 based controller, interface, power supply, charge coupled device camera, protective hermetically sealed housing, and mechanical interfaces. Communication is over fiber optics with identical facility hardware for both instruments. Each has three triggers that can be either fiber optic or coax. High voltage protection consists of a vacuum sensor to enable the high voltage and pulsed microchannel plate phosphor voltage. In the streak camera, the high voltage is removed after the sweep. Both rely on the hardened aluminum box and a custom power supply to reduce electromagnetic pulse/electromagnetic interference (EMP/EMI) getting into the electronics. In addition, the streak camera has an EMP/EMI shield enclosing the front of the streak tube.

Download or read book A High Energy X ray Imager for Inertial Confinement Fusion at the National Ignition Facility written by T. Phillips and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: X-ray imaging is a fundamental diagnostic tool for inertial confinement fusion (ICF) research, and provides data on the size and the shape of the core in implosions. We report on the feasibility and performance analysis of an ignition x-ray imager to be used on cryogenic DT implosions at the National Ignition Facility. The system is intended to provide time-integrated, broadband, moderate-energy x-ray core images of imploding ICF capsules. It is optimized with respect to spatial-resolution, signal-to-background and signal-to-noise ratios, taking into account the extreme operating conditions expected at NIF due to high expected neutrons yields, gamma-rays, and x-rays from laser-plasma interactions.

Download or read book Handbook of Coal Analysis written by James G. Speight and published by John Wiley & Sons. This book was released on 2005-05-13 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: All the guidance needed to test coal and analyze the results With the skyrocketing costs of most fuel sources, government, industry, and consumers are taking a greater interest in coal, an abundant and inexpensive alternative, which has been made more environmentally friendly through new technology. Published in response to this renewed interest, Handbook of Coal Analysis provides readers with everything they need to know about testing and analyzing coal. Moreover, it explains the meaning of test results and how these results can predict coal behavior and its corresponding environmental impact during use. The thorough coverage of coal analysis includes: * Detailed presentation of necessary standard tests and procedures * Explanation of coal behavior relative to its usage alongside the corresponding environmental issues * Coverage of nomenclature, terminology, sampling, and accuracy and precision of analysis * Step-by-step test method protocols for proximate analysis, ultimate analysis, mineral matter, physical and electrical properties, thermal properties, mechanical properties, spectroscopic properties, and solvent properties * Emphasis on relevant American Society for Testing and Materials (ASTM) standards and test methods, including corresponding International Organization for Standardization (ISO) and British Standards Institution (BSI) test method numbers To assist readers in understanding the material, a glossary of terms is provided. Each term is defined in straightforward language that enables readers to better grasp complex concepts and theory. References at the end of each chapter lead readers to more in-depth discussions of specialized topics. This is an essential reference for analytical chemists, process chemists, and engineers in the coal industry as well as other professionals and researchers who are looking to coal as a means to decrease dependence on foreign oil sources and devise more efficient, cleaner methods of energy production.

Download or read book Machine Tools for High Performance Machining written by Norberto Lopez de Lacalle and published by Springer Science & Business Media. This book was released on 2008-10-01 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machine tools are the main production factor for many industrial applications in many important sectors. Recent developments in new motion devices and numerical control have lead to considerable technological improvements in machine tools. The use of five-axis machining centers has also spread, resulting in reductions in set-up and lead times. As a consequence, feed rates, cutting speed and chip section increased, whilst accuracy and precision have improved as well. Additionally, new cutting tools have been developed, combining tough substrates, optimal geometries and wear resistant coatings. “Machine Tools for High Performance Machining” describes in depth several aspects of machine structures, machine elements and control, and application. The basics, models and functions of each aspect are explained by experts from both academia and industry. Postgraduates, researchers and end users will all find this book an essential reference.

Download or read book Switched on Pop written by Nate Sloan and published by Oxford University Press, USA. This book was released on 2019-12-13 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pop music surrounds us - in our cars, over supermarket speakers, even when we are laid out at the dentist - but how often do we really hear what's playing? Switched on Pop is the book based on the eponymous podcast that has been hailed by NPR, Rolling Stone, The Guardian, and Entertainment Weekly for its witty and accessible analysis of Top 40 hits. Through close studies of sixteen modern classics, musicologist Nate Sloan and songwriter Charlie Harding shift pop from the background to the foreground, illuminating the essential musical concepts behind two decades of chart-topping songs. In 1939, Aaron Copland published What to Listen for in Music, the bestseller that made classical music approachable for generations of listeners. Eighty years later, Nate and Charlie update Copland's idea for a new audience and repertoire: 21st century pop, from Britney to Beyoncé, Outkast to Kendrick Lamar. Despite the importance of pop music in contemporary culture, most discourse only revolves around lyrics and celebrity. Switched on Pop gives readers the tools they need to interpret our modern soundtrack. Each chapter investigates a different song and artist, revealing musical insights such as how a single melodic motif follows Taylor Swift through every genre that she samples, André 3000 uses metric manipulation to get listeners to "shake it like a Polaroid picture," or Luis Fonsi and Daddy Yankee create harmonic ambiguity in "Despacito" that mirrors the patterns of global migration. Replete with engaging discussions and eye-catching illustrations, Switched on Pop brings to life the musical qualities that catapult songs into the pop pantheon. Readers will find themselves listening to familiar tracks in new waysand not just those from the Top 40. The timeless concepts that Nate and Charlie define can be applied to any musical style. From fanatics to skeptics, teenagers to octogenarians, non-musicians to professional composers, every music lover will discover something ear-opening in Switched on Pop.

Download or read book The Poltergeist Prince of London written by James Clark and published by The History Press. This book was released on 2013-10-01 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: It began with a key. One afternoon in 1956, in the home of the Hitchings family in Battersea, south London, a small silver key appeared on Shirley Hitchings' bed. This seemingly insignificant event heralded the beginning of one of the most terrifying, incredible and mysterious hauntings in British history. The spirit, who quickly became known as 'Donald', began to communicate, initially via tapping sounds, but over time - and with the encouragement of psychical researcher Harold Chibbett, whose case-files appear here – by learning to write. Soon, the spirit had begun to make simply incredible claims about his identity, insisting that he was one of the most famous figures in world history – but what was the truth? Here, for the first time, is the full story, told by the woman right at the heart of it all – Shirley herself.

Download or read book Words to Rhyme with written by Willard R. Espy and published by Checkmark Books. This book was released on 2001 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: An easy-to-use dictionary of over 80,000 rhyming words.

Download or read book Anagram Solver written by Bloomsbury Publishing and published by Bloomsbury Publishing. This book was released on 2009-01-01 with total page 719 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anagram Solver is the essential guide to cracking all types of quiz and crossword featuring anagrams. Containing over 200,000 words and phrases, Anagram Solver includes plural noun forms, palindromes, idioms, first names and all parts of speech. Anagrams are grouped by the number of letters they contain with the letters set out in alphabetical order so that once the letters of an anagram are arranged alphabetically, finding the solution is as easy as locating the word in a dictionary.

Download or read book The Australian Official Journal of Trademarks written by and published by . This book was released on 1906 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: