Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
In order to predict the global energy confinement time in the next generation of large tokamaks it is essential to have data from machines of different sizes and operating parameter regimes. This data can also be used to construct dimensionless scalings and thereby attempt to differentiate between Bohm and gyro-Bohm based transport models. Previously, at the request of the ITER project, H-mode global confinement data was assembled from six machines ASDEX, DIII-D, JET, JFT-2M, PBX-M, and PDX into a single database. This collaboration has continued with the initial database being expanded by extending the plasma parameter space as well as by improving the precision of some of the relevant calculated plasma parameters. This paper summarizes work that has been performed on the newest version (ITERH. DB2) of the confinement database.
Analysis of the ITER H-mode Confinement Database
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
In order to predict the global energy confinement time in the next generation of large tokamaks it is essential to have data from machines of different sizes and operating parameter regimes. This data can also be used to construct dimensionless scalings and thereby attempt to differentiate between Bohm and gyro-Bohm based transport models. Previously, at the request of the ITER project, H-mode global confinement data was assembled from six machines ASDEX, DIII-D, JET, JFT-2M, PBX-M, and PDX into a single database. This collaboration has continued with the initial database being expanded by extending the plasma parameter space as well as by improving the precision of some of the relevant calculated plasma parameters. This paper summarizes work that has been performed on the newest version (ITERH. DB2) of the confinement database.
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
Book Description
In order to predict the global energy confinement time in the next generation of large tokamaks it is essential to have data from machines of different sizes and operating parameter regimes. This data can also be used to construct dimensionless scalings and thereby attempt to differentiate between Bohm and gyro-Bohm based transport models. Previously, at the request of the ITER project, H-mode global confinement data was assembled from six machines ASDEX, DIII-D, JET, JFT-2M, PBX-M, and PDX into a single database. This collaboration has continued with the initial database being expanded by extending the plasma parameter space as well as by improving the precision of some of the relevant calculated plasma parameters. This paper summarizes work that has been performed on the newest version (ITERH. DB2) of the confinement database.
เพลงชีวิต
Projection of ITER Performance Using the Multi-machine L- and H- Mode Databases
ITER L-mode Confinement Database
Author: ITER Confinement Database Working Group
Publisher:
ISBN:
Category : Plasma confinement
Languages : en
Pages : 58
Book Description
Publisher:
ISBN:
Category : Plasma confinement
Languages : en
Pages : 58
Book Description
Scientific and Technical Aerospace Reports
Diagnostics for Experimental Thermonuclear Fusion Reactors 2
Author: Peter E. Stott
Publisher: Springer Science & Business Media
ISBN: 1461553539
Category : Science
Languages : en
Pages : 615
Book Description
This book of proceedings collects the papers presented at the workshop on "Diagnostics for Experimental Fusion Reactors" held at Villa Monastero, Varenna (Italy) September 4-12, 1997. This workshop was the seventh organized by the International School of Plasma Physics "Piero Caldirola" on the topic of plasma diagnostics and the second devoted to the diagnostic studies for the International Thermonuclear Experimental Reactor (ITER). The proceedings of the first workshop on ITER diagnostics were published by Plenum Press in 1996 with the title "Diagnostics for Experimental Thermonuclear Fusion Reactors". While many of the ideas and studies reported in the first workshop remain valid, there has been sub stantial progress in the design and specification of many diagnostics for ITER. This moti vated a second workshop on this topic and the publication of a new book of proceedings. ITER is a joint venture between Europe, Japan, Russia and USA in the field of con trolled thermonuclear fusion research. The present aim of ITER is to design an experimental fusion reactor that can demonstrate ignition and sustained burn in a magnetically confined plasma. To achieve this goal, a wide range of plasma parameters will have to be measured reliably. It is also anticipated that diagnostics will be used much more extensively as input to control systems on ITER than on present fusion devices and this will require increased relia bility and long-term stability.
Publisher: Springer Science & Business Media
ISBN: 1461553539
Category : Science
Languages : en
Pages : 615
Book Description
This book of proceedings collects the papers presented at the workshop on "Diagnostics for Experimental Fusion Reactors" held at Villa Monastero, Varenna (Italy) September 4-12, 1997. This workshop was the seventh organized by the International School of Plasma Physics "Piero Caldirola" on the topic of plasma diagnostics and the second devoted to the diagnostic studies for the International Thermonuclear Experimental Reactor (ITER). The proceedings of the first workshop on ITER diagnostics were published by Plenum Press in 1996 with the title "Diagnostics for Experimental Thermonuclear Fusion Reactors". While many of the ideas and studies reported in the first workshop remain valid, there has been sub stantial progress in the design and specification of many diagnostics for ITER. This moti vated a second workshop on this topic and the publication of a new book of proceedings. ITER is a joint venture between Europe, Japan, Russia and USA in the field of con trolled thermonuclear fusion research. The present aim of ITER is to design an experimental fusion reactor that can demonstrate ignition and sustained burn in a magnetically confined plasma. To achieve this goal, a wide range of plasma parameters will have to be measured reliably. It is also anticipated that diagnostics will be used much more extensively as input to control systems on ITER than on present fusion devices and this will require increased relia bility and long-term stability.
A Global Energy Confinement H-mode Database for ITER
Multi-machine Global Confinement and H-mode Threshold Analysis
Author: Joseph Allan Snipes
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
The ITPA Confinement and H-mode Threshold Databases have been used to analyze energy confinement at high density and the dependencies of the H-mode threshold power on aspect ratio ..., edge safety factor, and plasma effective charge (Zeff). High density data from ASDEX-Upgrade, DIII-D, and JET indicate that with peaked density profiles it is possible to maintain good global energy confinement (H98y2 [approx.] 1) up to and beyond the Greenwald density limit even though the loss power ... does not exceed the H-mode threshold power scaling. The new low aspect ratio MAST data in the threshold database permits initial regressions to be made including the aspect ratio. The inverse aspect ratio dependence of the threshold power cannot be determined with the present dataset due to inconsistencies in the threshold between low inverse aspect ratio devices (ASDEX, PBX-M) and MAST. New scalings for the threshold power have been produced, which yield similar values as previous scalings for the predicted threshold power in ITER. There is an increase in the H-mode threshold at low q95
Publisher:
ISBN:
Category :
Languages : en
Pages : 16
Book Description
The ITPA Confinement and H-mode Threshold Databases have been used to analyze energy confinement at high density and the dependencies of the H-mode threshold power on aspect ratio ..., edge safety factor, and plasma effective charge (Zeff). High density data from ASDEX-Upgrade, DIII-D, and JET indicate that with peaked density profiles it is possible to maintain good global energy confinement (H98y2 [approx.] 1) up to and beyond the Greenwald density limit even though the loss power ... does not exceed the H-mode threshold power scaling. The new low aspect ratio MAST data in the threshold database permits initial regressions to be made including the aspect ratio. The inverse aspect ratio dependence of the threshold power cannot be determined with the present dataset due to inconsistencies in the threshold between low inverse aspect ratio devices (ASDEX, PBX-M) and MAST. New scalings for the threshold power have been produced, which yield similar values as previous scalings for the predicted threshold power in ITER. There is an increase in the H-mode threshold at low q95
Iter Physics
Author: C Wendell Horton, Jr
Publisher: World Scientific
ISBN: 9814678686
Category : Science
Languages : en
Pages : 248
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.
Publisher: World Scientific
ISBN: 9814678686
Category : Science
Languages : en
Pages : 248
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.
ITER Parametric Analysis and Operational Performance
Author:
Publisher:
ISBN:
Category : Engineering test reactors
Languages : en
Pages : 108
Book Description
Publisher:
ISBN:
Category : Engineering test reactors
Languages : en
Pages : 108
Book Description