Download or read book Development of Negative Ion Sources for Accelerator Fusion and Semiconductor Manufacturing Applications written by Sami Hahto and published by . This book was released on 2003 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Applications of Negative Ion Sources written by Vadim Dudnikov and published by Springer Nature. This book was released on 2023-06-22 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the development of sources of negative ions and their application in science and industry. It describes the physical foundations and implementation of the key methods of negative ion production and control, such as charge exchange, thermionic emission, plasma volume, secondary emission (sputtering) and surface-plasma sources, as well as the history of their development. Following on from this essential foundational material, the book goes on to explore transport of negative ion beams, and beam-plasma instabilities. Now in its second edition, the book has been substantially expanded and updated to address the many developments since it was first published, most importantly the development and investigation of cesiated surfaces with work function ~1.2-1.3 eV in conditions close to discharges in surface plasma sources. The book also includes a new chapter on development of conversion targets for high-energy neutral beam injectors, covering gas targets, plasma targets and photon targets for efficient conversion of high energy negative ion beams to neutral beams. With exposition accessible at the graduate level, and a comprehensive bibliography, this book will appeal to all students and researchers whose work concerns ion sources and their applications to accelerators, beam physics, storage rings, cyclotrons, and plasma traps.
Download or read book Second International Symposium on Negative Ions Beams and Sources written by Yasuhiko Takeiri and published by American Institute of Physics. This book was released on 2011-11-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The topic of Negative ion, beams and ion sources covers all fields related to fusion, accelerator, industrial applications. This proceedings would be of interest to Industry (Energy and electricity companies), Physics and Engineering Departments at Universities, as secondary audience I would consider many scientists working in many areas who, because they are curious, will be interested in reading this book. NIBS2010 is the only symposium dedicated to all aspects of negative ions in physics and technology from formation to application. NIBS2010 covers negative hydrogen ion production, extraction, acceleration, and transport mainly for fusion and accelerator applications. New approaches of negative heavy ions are introduced for material science and space propulsion.
Download or read book 30 Years of High intensity Negative Ion Sources for Accelerators written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thirty years ago, July 1, 1971, significant enhancement of negative ion emission from a gas discharge following an admixture of cesium was observed for the first time. This observation became the basis for the development of Surface Plasma Sources (SPS) for efficient production of negative ions from the interaction of plasma particles with electrodes on which adsorbed cesium reduced the surface work-function. The emission current density of negative ions increased rapidly from j (approximately) 10 mA/cm2 to 3.7 A/cm2 with a flat cathode and up to 8 A/cm2 with an optimized geometrical focusing in the long pulse SPS, and to 0.3 A/cm2 for DC SPS, recently increased up to 0.7 A/cm2. Discovery of charge-exchange cooling helped decrease the negative ion temperature T below 1 eV, and increase brightness by many orders to a level compatible with the best proton sources, B = j/T> 1 A/cm2 eV. The combination of the SPS with charge-exchange injection improved large accelerators operation and has permitted beam accumulation up to space-charge limit and overcome this limit several times. The early SPS for accelerators have been in operation without modification for (approximately) 25 years. Advanced version of the SPS for accelerators is described. Features of negative ion beam formation, transportation, space-charge neutralization-overneutralization, and instability damping is considered. Practical aspects of SPS operation and high brightness beam production is discussed.
Download or read book Production and Neutralization of Negative Ions and Beams written by Joseph D. Sherman and published by American Institute of Physics. This book was released on 2005-04-20 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: This symposium addresses all aspects of H- and D- sources, the formation of negative hydrogen and deuterium beams from these sources, and their beam transport properties. The discussion includes both the latest theoretical and experimental work in these areas. The negative ion sources are multicusp, Penning, magnetron, rf (1-13 MHz), surface converter, microwave/ECR (GHz frequency), and polarized source types. Experimental work also includes beam chopping, space-charge lenses, optimized negative ion extraction systems, and beam diagnostics. The negative ion production mechanisms are volume (pure hydrogen or deuterium discharge) and surface production using cesium or other alkali metal to catalyze negative ion production. Theoretical analyses include plasma chemistry, particle-in-cell modeling, and H-/D- extraction physics simulations. The main applications for H- sources are in high-energy neutral beam injectors for fusion reactors and H- sources for charge exchange injection into synchrotrons or spallation neutron source storage rings.
Download or read book Production and Neutralization of Negative Ions and Beams Eighth International Symposium Production and Application of Light Negative Ions Seventh European Workshop A Joint Meeting written by Claude Jacquot and published by American Inst. of Physics. This book was released on 1998-09-11 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprising the proceedings of the September 1997 symposium (called the Symposium with the Long Name by some insiders), this volume contains 28 contributions, arranged into five sections: fundamental processes; diagnostics; sources; negative ions acceleration; and applications and systems. With act
Download or read book Production and Neutralization of Negative Ions and Beams written by Alessi and published by American Inst. of Physics. This book was released on 1998-04-15 with total page 978 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development of High intensity Negative Ion Sources and Beams in the USSR written by Nikita Wells and published by . This book was released on 1985 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Plasma Technology Two Volume Set written by J. Leon Shohet and published by CRC Press. This book was released on 2016-12-12 with total page 1654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical plasmas have a wide range of industrial applications. The Encyclopedia of Plasma Technology covers all aspects of plasma technology from the fundamentals to a range of applications across a large number of industries and disciplines. Topics covered include nanotechnology, solar cell technology, biomedical and clinical applications, electronic materials, sustainability, and clean technologies. The book bridges materials science, industrial chemistry, physics, and engineering, making it a must have for researchers in industry and academia, as well as those working on application-oriented plasma technologies. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]
Download or read book Fourth International Symposium on Negative Ions Beams and Sources NIBS 2014 written by Werner Kraus and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Most of the contributions were on accelerator and fusion applications. Both of these topics require that negative ions of Hydrogen or Deuterium are produced. For accelerators, the requirement on the ion source is for a beam of either short pulses or continuous operation plus the beam should be intense with a small diameter and good divergence for matching into the transport system. The development for the fusion aims at sources capable of delivering large current beams of several tens of amperes and dimensions of many hundreds of square centimeters, that are operated in near steady state (hour long pulses). In fusion, as well, the trend to replacing arc sources with RF driven sources which occurred in the past with accelerators has started. In modern negative ion sources the negative ions are, in most cases, produced by conversion of positive ions and neutrals on Caesium covered surfaces. The issues related to operation of an ion source with a Caesium coated converter are still challenges to the development community and several novel ideas on this topic were presented at the symposium."--Preface.
Download or read book Production and Neutralization of Negative Ions and Beams written by Martin P. Stockli and published by American Institute of Physics. This book was released on 2007-08-30 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reported advances with small sources of negative ions, especially negative hydrogen ions, drive the progress of many accelerators and enable new research methods and technologies. Large sources of negative deuterium ions are being developed for the international experimental fusion reactor (ITER) that will require 40 MW of plasma heating. The developments increasingly use computer modeling to understand the underlying physics, improve existing, and develop new technologies.
Download or read book Production and Neutralization of Negative Ion Beams written by Ady Hershcovitch and published by American Institute of Physics. This book was released on 1990 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design of the Prototype Negative Ion Source for Neutral Beam Injector at ASIPP supported by National Natural Science Foundation of China Nos 11505224 11575240 11405207 the National Magnetic Confinement Fusion Science Program of China Nos 2013GB101001 2013GB101002 2013GB101003 International Science and Technology Cooperation Program of China No 2014DFG61950 and Foundation of ASIPP No DSJJ 14 JC07 written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In order to support the design, manufacture and commissioning of the negative-ion-based neutral beam injection (NBI) system for the Chinese Fusion Engineering Test Reactor (CFETR), the Hefei utility negative ion test equipment with RF source (HUNTER) was proposed at ASIPP. A prototype negative ion source will be developed at first. The main bodies of plasma source and accelerator of the prototype negative ion source are similar to that of the ion source for EAST-NBI. But instead of the filament-arc driver, an RF driver is adopted for the prototype negative ion source to fulfill the requirement of long pulse operation. A cesium seeding system and a magnetic filter are added for enhancing the negative ion density near the plasma grid and minimizing co-extracted electrons. Besides, an ITER-like extraction system is applied inside the accelerator, where the negative ion beam is extracted and accelerated up to 50 kV.
Download or read book A Study of Negative Ion Sources for a Charge exchange Accelerator written by Toivo Henry Koski and published by . This book was released on 1956 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Evaluation of a Negative Ion Source for a Heavy Ion Fusion Negative Ion Driver written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Negative halogen ions have recently been proposed as a possible alternative to positive ions for heavy ion fusion drivers because electron accumulation would not be a problem in the accelerator, and if desired, the beams could be photo-detached to neutrals. To test the ability to make suitable quality beams, an experiment was conducted at Lawrence Berkeley National Laboratory using chlorine in an RF-driven ion source. Without introducing any cesium (which is required to enhance negative ion production in hydrogen ion sources) a negative chlorine current density of 45 mA/cm2 was obtained under the same conditions that gave 57 45 mA/cm2 of positive chlorine, suggesting the presence of nearly as many negative ions as positive ions in the plasma near the extraction plane. The negative ion spectrum was 99.5% atomic chlorine ions, with only 0.5% molecular chlorine, and essentially no impurities. Although this experiment did not incorporate the type of electron suppression technology that i s used in negative hydrogen beam extraction, the ratio of co-extracted electrons to Cl− was as low as 7 to 1, many times lower than the ratio of their mobilities, suggesting that few electrons are present in the near-extractor plasma. This, along with the near-equivalence of the positive and negative ion currents, suggests that the plasma in this region was mostly an ion-ion plasma. The negative chlorine current density was relatively insensitive to pressure, and scaled linearly with RF power. If this linear scaling continues to hold at higher RF powers, it should permit current densities of 100 45 mA/cm2, sufficient for present heavy ion fusion injector concepts. The effective ion temperatures of the positive and negative ions appeared to be similar and relatively low for a plasma source.
Download or read book Production and Neutralization of Negative Ions and Beams written by Krsto Prelec and published by . This book was released on 1996 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
