Download or read book Millimeter Wave Imaging Technologies for Plasma Diagnostics on Superconducting Tokomak Machines written by Zuowei Shen and published by . This book was released on 2007 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Performance Electronics for Millimeter wave to terahertz Plasma Diagnostics Instrumentation and High Power Devices written by Wen-Ching Tsai and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusion energy has great potential to meet the ever increasing global energy demand. The most promising magnetic confinement device, the tokamak, remains the dominant candidate for fusion power generation. The generated thermal power from tokamaks is comparable to fission nuclear power, but with no possibility of catastrophic accidents (such as the melting of fuel rods in the Fukushima I reactors caused by the failure of the cooling systems) if the facilities were damaged. This safety feature arises from the fact that magnetic fusion can only be achieved under very precise circumstances, and damage to any key system will immediately result in a cessation of the fusion reaction. Our goal is to develop advanced visualization tools via imaging diagnostics to provide fundamental physics understanding and thus help determine the optimum path to achieve and sustain magnetic fusion. High resolution Terahertz (THz) imaging diagnostics are exceptionally well suited to this task due to the characteristic properties of fusion plasmas at THz frequencies. High performance electronics have been developed for the far-infrared tangential interferometer and polarimeter (FIReTIP) system on the National Spherical Tokamak Experiment (NSTX) device. This work significantly increased both the phase and temporal resolution of the FIReTIP system, thereby allowing it to monitor high frequency density and magnetic field fluctuations up to 4 MHz with unprecedented accuracy, which is of critical performance as characterizing these fluctuations are essential in understanding transport physics issues in fusion plasmas. The millimeter-wave and THz spectral region offers tremendous potential for a diverse range of applications outside of plasma diagnostics in fields such as communications, biomedical diagnostics, remote imaging and concealed weapons detection. The unique THz spectral region offers exciting and novel application opportunities arising from its inherent advantages in spatial resolution and data rate, bandwidth, and component compactness, but the lack of sufficient source power has not been adequately solved. High power radiation sources in the THz range also have considerable application in advanced fusion plasma diagnostics. Work is presented herein on the design of waveguide components and a high efficiency pulse modulator to support the development of integrated high power sources for fusion diagnostics and other applications.
Download or read book 2 D Imaging of Electron Temperature in Tokamak Plasmas written by Tobin Leo Munsat and published by . This book was released on 2004 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Implementation of an Electron Cyclotron Emission Imaging Diagnostic for the TEXTOR Tokamak written by Benjamin John Tobias and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The advancement of magnetic confinement nuclear fusion toward a viable source of energy on the scale of today's conventional power plants requires the development of a broad range of instruments for use in present day experimental fusion reactors. A class of plasma diagnostic systems that make use of electromagnetic emission from free electrons includes Electron Cyclotron Emission Imaging (ECEI), conceived at the University of California at Davis as an extension of ECE radiometry. A new ECEI system with unique capabilities is designed and realized for use on the Tokamak Experiment for Technology Oriented Research (TEXTOR), a toroidal plasma confinement device located at Forschungszentrum Jülich, Germany. The TEXTOR ECEI system is capable of 128 channel (16 vertical by 8 radial) 2-D imaging of electron temperature fluctuations below 1% in the poloidal plane on [mu]s time scales. Advancements in a variety of millimeter wave technologies are discussed, including the development of dual-dipole antennas and miniature elliptical substrate lenses, planar quasi-optical notch filters, dichroic plate high-pass filters, dielectric film beamsplitters, RF electronics for double down-conversion heterodyne frequency mixing and signal detection, and optical coupling of electron cyclotron emission signals and local oscillator power. Particular emphasis is given to the development of a new heuristic for the design of optical coupling systems for millimeter wave imaging arrays which has resulted in the realization of the feature of independent vertical zoom, new to ECEI, by which the vertical extent of the plasma image may be continuously varied from 20 to 35 cm. The new TEXTOR ECEI system is compared in laboratory characterization to the legacy ECEI system, which it replaced in 2008, to reveal dramatic improvements in image quality, optical performance, and system noise temperature. Finally, the installation of this diagnostic is discussed and data obtained during commissioning are presented. A look forward to continuing projects in the field of ECEI reveals an exciting future for the technology with growing international collaboration and invaluable contributions to the effort to develop energy resources that may some day eliminate mankind's dependence on fossil fuels.
Download or read book Electron Cyclotron Emission Imaging System for HL 2A Tokamak written by Shao Che and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic confinement thermonuclear fusion energy has long been considered a potential substitute for fossil fuels as the major long term energy source of global development. With its effective magnetic field configuration, tokamak devices have received extensive investigations with advancement in plasma diagnostic tools [1]. A comprehensive millimeter wave passive imaging diagnostic system for measurement of electron temperature fluctuations in tokamaks has been conceived and developed at the University of California at Davis utilizing the Electron Cyclotron Emission from the plasma [2,3]. HL-2A is a diverted tokamak developed and constructed by the Southwestern Institute of Physics (SWIP) in Chengdu, China based on the vacuum vessel and magnetic coil system of the former German ASDEX device. Previous millimeter wave diagnostics including reflectometry and ECE radiometry have been installed on the tokamak for electron density and temperature profile measurements [4,5]. However, there is increasing need for fluctuation measurements over the plasma volume for research into plasma confinement and instabilities. Through a collaborative effort between the Davis Millimeter Wave Research Center (DMRC) of the University of California at Davis and SWIP, a new 192 channel (24 vertical by 8 radial) Electron Cyclotron Emission Imaging system has been designed and constructed at UC Davis for a 2 dimensional coverage of the plasma temperature with high spatial resolution. A new imaging optical system with zooming capability is optimized for the available port window on HL-2A with a versatile coverage of the plasma volume ranging from a magnification ratio of 1 to 1.8. A novel local oscillator (LO) optical system is designed to maintain the optimum illumination onto the antenna array under different operating frequencies of the Backward Wave Oscillator. The RF electronics for double down-conversion heterodyne frequency mixing and signal detection is developed from the DIIID ECEI system with improved sensitivity and reduced noise. Other millimeter wave components such as the dual-dipole antenna array and dichroic plate high-pass filters are fabricated and characterized. The complete system is assembled and calibrated in the laboratory at UC Davis with extensive testing and characterization of the functionality of each subsystem.
Download or read book Millimeter wave Reflectometry Diagnostics on the DIII D Tokamak written by Thomas Martin Lehecka and published by . This book was released on 1989 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency Selective Surface Notch Filter in Plasma Diagnostics System written by Zuowei Shen and published by . This book was released on 2006 with total page 290 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 1988 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Information of Japan Oral Presentation written by and published by . This book was released on 1996 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Energy Update written by and published by . This book was released on 1980 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Fusion Technology written by Thomas J. Dolan and published by Springer Science & Business Media. This book was released on 2014-02-10 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Fusion Technology describes the technologies that are required for successful development of nuclear fusion power plants using strong magnetic fields. These technologies include: • magnet systems, • plasma heating systems, • control systems, • energy conversion systems, • advanced materials development, • vacuum systems, • cryogenic systems, • plasma diagnostics, • safety systems, and • power plant design studies. Magnetic Fusion Technology will be useful to students and to specialists working in energy research.
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2018 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report of the Committee on a Strategic Plan for U S Burning Plasma Research written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-07-01 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fusion offers the prospect of virtually unlimited energy. The United States and many nations around the world have made enormous progress toward achieving fusion energy. With ITER scheduled to go online within a decade and demonstrate controlled fusion ten years later, now is the right time for the United States to develop plans to benefit from its investment in burning plasma research and take steps to develop fusion electricity for the nation's future energy needs. At the request of the Department of Energy, the National Academies of Sciences, Engineering, and Medicine organized a committee to develop a strategic plan for U.S. fusion research. The final report's two main recommendations are: (1) The United States should remain an ITER partner as the most cost-effective way to gain experience with a burning plasma at the scale of a power plant. (2) The United States should start a national program of accompanying research and technology leading to the construction of a compact pilot plant that produces electricity from fusion at the lowest possible capital cost.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1994-02 with total page 1586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Nucl aire written by and published by . This book was released on 2001 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
