Author: Alan Coulter EnglandPublisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 14
Book Description
Fusion-neutron Production in the TFTR with Deuterium Neutral-beam Injection
Author: Alan Coulter EnglandPublisher:
ISBN:
Category : Neutrons
Languages : en
Pages : 14
Book Description
Fusion-neutron Production in the TFTR with Deuterium Neutral Beam Injection
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We report measurements of the fusion reaction rate in the Tokamak Fusion Test Reactor (TFTR) covering a wide range of plasma conditions and injected neutral beam powers up to 6.3 MW. The fusion-neutron production rate in beam-injected plasmas decreases slightly with increasing plasma density n/sub e/, even though the energy confinement parameter n/sub e/tau/sub E/ generally increases with density. The measurements indicate and Fokker-Planck simulations show that with increasing density the source of fusion neutrons evolves from mainly beam-beam and beam-target reactions at very low n/sub e/ to a combination of beam-target and thermonuclear reactions at high n/sub e/. At a given plasma current, the reduction in neutron source strength at higher n/sub e/ is due to both a decrease in electron temperature and in beam-beam reaction rate. The Fokker-Planck simulations also show that at low n/sub e/, plasma rotation can appreciably reduce the beam-target reaction rate for experiments with co-injection only. The variation of neutron source strength with plasma and beam parameters is as expected for beam-dominated regimes. However, the Fokker-Planck simulations systematically overestimate the measured source strength by a factor of 2 to 3; the source of this discrepancy has not yet been identified.
Fusion Neutron Production During Deuterium Neutral Beam Injection Into PLT.
Author: Patrick L. ColestockPublisher:
ISBN:
Category : Deuterium
Languages : en
Pages : 95
Book Description
Characteristics of Confinement and Fusion Reactivity in JT-60U High-[beta][rho] and TFTR Supershot Regimes with Deuterium Neutral Beam Injection
![Characteristics of Confinement and Fusion Reactivity in JT-60U High-[beta][rho] and TFTR Supershot Regimes with Deuterium Neutral Beam Injection PDF](https://books.google.com/books/content/images/frontcover/znQPkAEACAAJ?fife=w80-h100)
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The high performance regimes achieved in JT-60U and TFTR have produced peak DD fusion neutron rates up to 5.6[times] 10[sup 16]/s for similar heating beam powers, in spite of considerable differences in machine operation and plasma configuration. A common scaling for the DD fusion neutron rate (S[sub DD][proportional-to] P[sub abs][sup 2.0] H[sub ne] V[sub p][sup[minus]0.9]) is obtained, where P[sub abs] and H[sub ne] are the absorbed beam power and beam fueling peaking factor, respectively, and V[sub p] is the plasma volume. The maximum stored energy obtained in each machine has been up to 5.4 MJ in TFTR and 8.7 MJ in JT-60U. Further improvements in the fusion neutron rate and the stored energy are limited by the[beta]-limit in Troyon range, [beta][sub N][approximately] 2.0--2.5. A common scaling for the stored energy (W[sub tot][proportional-to] P[sub abs]V[sub p]H[sub ne][sup 0.2]) is also proposed.
Fusion Power Production in TFTR.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 14
Book Description
Up to 9.3 MW of fusion power has been produced from deuterium-tritium (DT) fusion reactions in the Tokamak Fusion Test Reactor (TFTR). The total fusion yield from a single plasma pulse has reached 6.5 MJ. The experiments in TFTR with deuterium-tritium plasmas fueled and heated by neutral beam injection span wide ranges in plasma and operating conditions. Through the use of lithium pellet conditioning to control the edge recycling, the plasma confinement in TFTR has been improved to the point where the stability of the plasma to pressure driven modes is limiting the fusion power for plasma currents up to 2.5 MA. The central energy and fusion power densities in these plasmas are comparable to those expected in a thermalized DT reactor, such as ITER.
Systems Approaches to Nuclear Fusion Reactors
Author: Frederick B. MarcusPublisher: Springer Nature
ISBN: 3031177118
Category : Science
Languages : en
Pages : 484
Book Description
This book offers an overall review, applying systems engineering and architecture approaches, of the design, optimization, operation and results of leading fusion experiments. These approaches provide a unified means of evaluating reactor design. Methodologies are developed for more coherent construction or evaluation of fusion devices, associated experiments and operating procedures. The main focus is on tokamaks, with almost all machines and their important results being integrated into a systems design space. Case studies focus on DIII-D, TCV, JET, WEST, the fusion reactor prototype ITER and the EU DEMO concept. Stellarator, Mirror and Laser inertial confinement experiments are similarly analysed, including reactor implications of breakeven at NIF. The book examines the engineering and physics design and optimization process for each machine, analysing their performance and major results achieved, thus establishing a basis for the improvement of future machines. The reader will gain a broad historical and up-to-date perspective of the status of nuclear fusion research from both an engineering and physics point of view. Explanations are given of the computational tools needed to design and operate successful experiments and reactor-relevant machines. This book is aimed at both graduate students and practitioners of nuclear fusion science and engineering, as well as those specializing in other fields demanding large and integrated experimental equipment. Systems engineers will obtain valuable insights into fusion applications. References are given to associated complex mathematical derivations, which are beyond the scope of this book. The general reader interested in nuclear fusion will find here an accessible summary of the current state of nuclear fusion.
Fusion Energy Update
Author: Conceptual Design of a Neutral-beam Injection System for the TFTR.
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The neutral-beam injection requirements for heating and fueling the next generation of fusion reactor experiments far exceed those of present devices; the neutral-beam systems needed to meet these requirements will be large and complex. A conceptual design of a TFTR tokamak injection system to produce 120 keV deuterium-ion beams with a total power of about 80 MW is given. (auth).
Author: 
Author: