TFTR Experimental Data Analysis Collaboration. Annual Progress Report Covering the Period November 15, 1993 - November 14, 1994 PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 5
Book Description
The research performed during the third year of this grant concentrated on a few key TFTR experimental data analysis issues: (1) characterization of MHD mode activity in TFTR; (2) comparison of low mode number MHD modes with neoclassical MHD theory; (3) further developments in local electron heat transient transport measurements; and (4) some other topics. Emphasis is placed on differences in these characteristics in DT and DD plasmas.
Author: Publisher: ISBN: Category : Languages : en Pages : 5
Book Description
The research performed during the third year of this grant concentrated on a few key TFTR experimental data analysis issues: (1) characterization of MHD mode activity in TFTR; (2) comparison of low mode number MHD modes with neoclassical MHD theory; (3) further developments in local electron heat transient transport measurements; and (4) some other topics. Emphasis is placed on differences in these characteristics in DT and DD plasmas.
Author: Publisher: ISBN: Category : Languages : en Pages : 13
Book Description
The research performed under the second year of this three-year grant has concentrated on a few key TFTR experimental data analysis issues: MHD mode identification and effects on supershots; identification of new MHD modes; MHD mode theory-experiment comparisons; local electron heat transport inferred from impurity-induced cool pulses; and some other topics. Progress in these areas and activities undertaken in conjunction with this grant are summarized briefly in this report.
Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
This is the second annual progress on the three-year Large Experiment Data Analysis Collaboration DOE grant DE-FGO2-92ER54139, which succeeded a previous four-year grant under the same grant number. This year most of the collaboration effort shifted from being with the TFTR program, to being with the DIII-D program, and most new research focused on the properties, causes and possible amelioration of neoclassical tearing modes. In addition, our studies of nonlocal electron heat transport in TFTR have attracted wider attention, and are now being transferred to similar research on DIII-D.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The research performed during the fourth (extension) year of this grant concentrated on a few key TFTR experimental data analysis issues: definitive identification that pressure-gradient-driven neoclassical MHD tearing modes are responsible for the low mode number magnetic islands in TFTR supershot plasmas; initiation of tearing-type locked mode physics activities; beginning attempts to determine the tearing mode parameter[Delta][prime] directly from electron fluctuation data; further studies of cool pulse propagation from the edge toward the center of TFTR discharges; investigation of tritium recycling in TFTR using the DT neutron rate; and some other topics. Progress in these areas and activities undertaken in conjunction with this grant are summarized briefly in this report.
Author: Publisher: ISBN: Category : Languages : en Pages : 6
Book Description
Studies of neoclassical tearing modes have remained the dominant area of research on this grant. Our major role in their development was recognized through an invited paper at the 1998 Pittsburgh DPP-APS meeting and through our inclusion as coauthors on some major TFTR and DIII-D papers. During this past year, prior work has been published on DIII-D experiment-motivated theories of stabilization of tearing modes via localized current-drive and heating and on effects of geometry on these modes (elongation and triangularity effects should be small in DIII-D), and on experimental studies of the imposed beta limits and direct, internal measurements of the critical classical tearing mode stability parameter (delta-prime). Also, linear and nonlinear theory and computation studies of classical tearing modes via the ''almost ideal MHD'' constraint has been the subject of a number of meeting presentations and has recently been published. Recent work has been concerned with developing a theoretical model for the magnitude of seed island perturbations due to, geometrically coupled magnetic perturbations (e.g., ELMS or sawtooth crashes) and simulations thereof, exploring the effects of external perturbations, development of a simulation model for flow shear effects, studies of the effect of the combination of flow shear and perpendicular viscosity in distorting the magnetic island structure and producing the phase shift in ECE signals across a magnetic island, simulations of feedback stabilization of tearing mode islands, and exploring what aspects of tearing modes need to be calculated for DIII-D. Our continuing role in transient transport and nonlocal electron heat transport was recognized by an invited paper at the June 1997 EPS Berchtesgaden meeting which was published this past year. In addition, further details of nonlocal electron heat transport, primarily on TFTR, have been the subject of meeting presentations and are being published. Since Dr. Kissick left this research group for UCLA in April 1998 and Prof. Callen is in the process of transferring leadership of the TTF Transient Transport Working Group to Prof. Gentle (U. Texas), it is anticipated that this grant research area will be substantially diminished in the future. Stimulated in large part by the excellent internal fluctuation diagnostics (primarily ECE and BES) for studying MHD modes in the interior of DIII-D, we have begun work in a new area: disruption precursors induced by MHD modes being driven slowly through their ideal stability boundaries. In particular, we have constructed a new model for the temporal development of such precursors and shown that it provides a very good fit to DIII-D data. Also, we are in the process of developing codes for comparing the spatial profile of the disruption precursors with those predicted from the GATO ideal MHD instability code.
Author: Federal Highway Federal Highway Administration Publisher: ISBN: Category : Languages : en Pages : 669
Book Description
This manual is intended to serve as a reference. It will provide technical information which will enable Manual users to perform the following activities:Describe typical erection practices for girder bridge superstructures and recognize critical construction stagesDiscuss typical practices for evaluating structural stability of girder bridge superstructures during early stages of erection and throughout bridge constructionExplain the basic concepts of stability and why it is important in bridge erection* Explain common techniques for performing advanced stability analysis along with their advantages and limitationsDescribe how differing construction sequences effect superstructure stabilityBe able to select appropriate loads, load combinations, and load factors for use in analyzing superstructure components during constructionBe able to analyze bridge members at various stages of erection* Develop erection plans that are safe and economical, and know what information is required and should be a part of those plansDescribe the differences between local, member and global (system) stability
Author: Publisher: ISBN: Category : Languages : en Pages : 96
Book Description
The Advocate is a lesbian, gay, bisexual, transgender (LGBT) monthly newsmagazine. Established in 1967, it is the oldest continuing LGBT publication in the United States.
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Author: Federal Highway Federal Highway Administration
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