Author: Patrick L. ColestockPublisher:
ISBN:
Category : Deuterium
Languages : en
Pages : 95
Book Description
Fusion Neutron Production During Deuterium Neutral Beam Injection Into PLT.
Author: Patrick L. ColestockPublisher:
ISBN:
Category : Deuterium
Languages : en
Pages : 95
Book Description
Fusion-neutron Production in the TFTR with Deuterium Neutral Beam Injection
Author: 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 Energy Update
Author: Energy Research Abstracts
Author: Neutron Production in a High-intensity Deuterium Neutral Beam Facility
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Measurement of d-d neutron yields incidentally produced in multi-megawatt neutral deuterium beam injectors used in magnetic fusion experiments is discussed. Unavoidable neutron production in the neutralizer, ion-beam dump, neutral beam calorimeter and beam collimator sections of an injector is measured to provide data for the design of radiation shielding and beam diagnostic experiments. At 120 kV, 10A, 0.5s pulsed injector operation, neutron yields plateau at an instantaneous yield from the calorimeter of 1011 n/s. Beam diagnostic applications of neutron measurements are adjustment of beam source conditions to maximize the full-energy fraction of the neutral beam on target, and measurement of density in the neutralizer. (RME).
Fusion Physics
Author: MITSURU KIKUCHIPublisher: International Atomic Energy
ISBN:
Category : Antiques & Collectibles
Languages : en
Pages : 1158
Book Description
Humans do not live by bread alone. Physically we are puny creatures with limited prowess, but with unlimited dreams. We see a mountain and want to move it to carve out a path for ourselves. We see a river and want to tame it so that it irrigates our fields. We see a star and want to fly to its planets to secure a future for our progeny. For all this, we need a genie who will do our bidding at a flip of our fingers. Energy is such a genie. Modern humans need energy and lots of it to live a life of comfort. In fact, the quality of life in different regions of the world can be directly correlated with the per capita use of energy [1.1–1.5]. In this regard, the human development index (HDI) of various countries based on various reports by the United Nations Development Programme (UNDP) [1.6] (Fig. 1.1), which is a parameter measuring the quality of life in a given part of the world, is directly determined by the amount of per capita electricity consumption. Most of the developing world (~5 billion people) is crawling up the UN curve of HDI versus per capita electricity consumption, from abysmally low values of today towards the average of the whole world and eventually towards the average of the developed world. This translates into a massive energy hunger for the globe as a whole. It has been estimated that by the year 2050, the global electricity demand will go up by a factor of up to 3 in a high growth scenario [1.7–1.9]. The requirements beyond 2050 go up even higher.
Neutron Sawtooth Oscillations in Deuterium Neutral Beam Heated PLT Discharges
Author: J. D. StrachanCharacteristics 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 Neutron Production Using Deuterium Fuel in an Inertial Electrostatic Confinement Device at 10 to 200 Kilovolts
Author: Aaron N. FancherPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This work details the advancement and understanding of fusion neutron generation capabilities using a deuterium fueled spherical gridded inertial electrostatic confinement (IEC) device operating up to 200 kV at the University of Wisconsin-Madison. The goal of this work was to extend the experimental and theoretical understanding of gridded IEC operations to previously unachieved 200 kV cathode operation and to investigate long term trends in the neutron production rate performance. To support this experimental investigation, hardware with the capability to reliably sustain 200 kV operation was successfully developed by constructing a resistively divided 2-stage high voltage vacuum feedthrough. Repeated measurements of the neutron production rate under fixed experimental conditions were performed over the span of 100 operational runs, which showed an upward trend in the neutron production rate performance. An investigation into the impact of impurity gas in the chamber during operation showed the reduction of impurity gas in the system and an increase in neutron production rate are correlated. An estimation of the neutron production rate increase over these runs due to embedded fusion reactions in the chamber wall showed a fuel density build up near the surface by the implantation of fast neutral deuterium particles leaving the system can plausibly account for the upward trend in neutron production rate measurements. Parametric studies measured the neutron production rate with variations in the device cathode voltage (10-200 kV), cathode current (30-100 mA) and chamber pressure (0.2-1.7 mTorr D2), and comparisons with a theoretical model are made. The results of this study showed the neutron production rate scales linearly with current as expected with a beam-target fusion regime and scales in a complex manner with voltage and pressure. Comparisons made to a theoretical model of the neutron production rate using an integral transport code showed the absolute neutron production rate prediction by the model is a factor of 7.8 lower than experimental measurements. A new record for steady-state D-D neutron production rate of 3.8x108 neutrons/s has been achieved in a gridded IEC device at a cathode voltage of 200 kV, cathode current of 100 mA, and chamber pressure of 1.0 mTorr D2.