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Author: William M. Burke
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
An Active MHD Diagnostic has been installed and operated on Alcator C--Mod to study Toroidal Alfven Eigenmodes (TAEs). The diagnostic consists of two broadband amplifiers and two antennas which can excite stable modes in the TAE frequency range. The plasma response to this excitation is measured by existing magnetic fluctuation diagnostics. Analysis of the fluctuation data provides information about the TAE frequencies and damping rates as well as mode structure. The Active MHD diagnostic has evolved since its first operation in 2002, when it could only operate over a limited, preprogrammed frequency band. Recent improvements include automatic tuning to cover frequencies from 100 to 750 kHz, and an interface to the Alcator C--Mod Digital Plasma Control System (DPCS). The DPCS monitors plasma parameters, calculates the nominal TAE frequency, and adjusts the frequency input to the MHD amplifiers, all in real time. Now the Active MHD Diagnostic can measure TAEs over an entire plasma shot. This paper is focused on the requirements and design of the MHD Amplifiers, particularly the tuning bandwidth. It will also present some preliminary results from the recent run campaign.
Author: William M. Burke
Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
An Active MHD Diagnostic has been installed and operated on Alcator C--Mod to study Toroidal Alfven Eigenmodes (TAEs). The diagnostic consists of two broadband amplifiers and two antennas which can excite stable modes in the TAE frequency range. The plasma response to this excitation is measured by existing magnetic fluctuation diagnostics. Analysis of the fluctuation data provides information about the TAE frequencies and damping rates as well as mode structure. The Active MHD diagnostic has evolved since its first operation in 2002, when it could only operate over a limited, preprogrammed frequency band. Recent improvements include automatic tuning to cover frequencies from 100 to 750 kHz, and an interface to the Alcator C--Mod Digital Plasma Control System (DPCS). The DPCS monitors plasma parameters, calculates the nominal TAE frequency, and adjusts the frequency input to the MHD amplifiers, all in real time. Now the Active MHD Diagnostic can measure TAEs over an entire plasma shot. This paper is focused on the requirements and design of the MHD Amplifiers, particularly the tuning bandwidth. It will also present some preliminary results from the recent run campaign.
Author: Joseph Allan Snipes
Publisher:
ISBN:
Category :
Languages : en
Pages : 26
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Book Description
When operating at low collisionality and high input power (PICRF /= 5 MW), large amplitude low frequency (fMHD
Author:
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ISBN:
Category : Fusion reactors
Languages : en
Pages : 808
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Author:
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ISBN:
Category : Engineering test reactors
Languages : en
Pages : 730
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Category : Aeronautics
Languages : en
Pages : 772
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Author:
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Category : Electrical engineering
Languages : en
Pages : 980
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Author: Thomas J. Dolan
Publisher: Springer Science & Business Media
ISBN: 1447155564
Category : Technology & Engineering
Languages : en
Pages : 816
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Book Description
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.
Author: C Wendell Horton, Jr
Publisher: World Scientific
ISBN: 9814678686
Category : Science
Languages : en
Pages : 248
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Book Description
The promise of a vast and clean source of thermal power drove physics research for over fifty years and has finally come to collimation with the international consortium led by the European Union and Japan, with an agreement from seven countries to build a definitive test of fusion power in ITER. It happened because scientists since the Manhattan project have envisioned controlled nuclear fusion in obtaining energy with no carbon dioxide emissions and no toxic nuclear waste products.This large toroidal magnetic confinement ITER machine is described from confinement process to advanced physics of plasma-wall interactions, where pulses erupt from core plasma blistering the machine walls. Emissions from the walls reduce the core temperature which must remain ten times hotter than the 15 million degree core solar temperature to maintain ITER fusion power. The huge temperature gradient from core to wall that drives intense plasma turbulence is described in detail.Also explained are the methods designed to limit the growth of small magnetic islands, the growth of edge localized plasma plumes and the solid state physics limits of the stainless steel walls of the confinement vessel from the burning plasma. Designs of the wall coatings and the special 'exhaust pipe' for spent hot plasma are provided in two chapters. And the issues associated with high-energy neutrons — about 10 times higher than in fission reactions — and how they are managed in ITER, are detailed.
Author: National Academies of Sciences Engineering and Medicine
Publisher:
ISBN: 9780309677608
Category :
Languages : en
Pages : 291
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Book Description
Plasma Science and Engineering transforms fundamental scientific research into powerful societal applications, from materials processing and healthcare to forecasting space weather. Plasma Science: Enabling Technology, Sustainability, Security and Exploration discusses the importance of plasma research, identifies important grand challenges for the next decade, and makes recommendations on funding and workforce. This publication will help federal agencies, policymakers, and academic leadership understand the importance of plasma research and make informed decisions about plasma science funding, workforce, and research directions.
Author:
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Category : Dissertations, Academic
Languages : en
Pages : 902
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