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A Program of FRC Theory Research Annual Report

Description: At the request of the Office of Fusion Energy, a group of experts was convened on February 6--8, 1990. This group met to assess the world data base on Reversed Field Pinch (RFP) physics, and, further, to assess the role of the ZTH experiment in providing reactor relevant physics understanding for that confinement geometry. This group met, analyzed some of the relevant literature, and heard extensive presentations on the physics of the RFP and the plans for the ZTH and RFX devices. The conclusio… more
Date: May 18, 1990
Creator: Krall, Nicholas A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Negative ion-based neutral injection on DIII-D

Description: High energy negative ion-based neutral beam injection is a strong candidate for heating and non-inductive current drive in tokamaks. Many of the questions related to the physics and engineering of this technique remain unanswered. In this paper, we consider the possibility of negative ion-based neutral beam injection on DIII-D. We establish the desired parameter space by examining physics trades. This is combined with potential design constraints and a survey of component technology options to … more
Date: January 1, 1990
Creator: Stewart, L. D.; Bhadra, D. K.; Colleraine, A. P. & Kim, J.
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Partner: UNT Libraries Government Documents Department
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Control of alpha particle transport by spatially inhomogeneous ion cyclotron resonance heating

Description: Control of the radial alpha particle transport by using Ion Cyclotron Range of Frequency waves is investigated in a large-aspect-ratio tokamak geometry. It is shown that spatially inhomogeneous ICRF-wave energy with properly selected frequencies and wave numbers can induce fast convective transport of alpha particles at the speed of order {upsilon}{sub alpha} {approximately} (P{sub RF}/n{sub {alpha}}{epsilon}{sub 0}) {rho}{sub p}, where P{sub RF} is the ICRF-wave power density, n{sub {alpha}} i… more
Date: February 1, 1990
Creator: Chang, C. S.; Imre, K.; Weitzner, H. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences) & Colestock, P. (Princeton Univ., NJ (USA). Plasma Physics Lab.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neoclassical transport of energetic minority tail ions generated by ion-cyclotron resonance heating in tokamak geometry

Description: Neoclassical transport of energetic minority tail ions, which are generated by high powered electromagnetic waves of the Ion Cyclotron Range of Frequencies (ICRF) at the fundamental harmonic resonance, is studied analytically in tokamak geometry. The effect of Coulomb collisions on the tail ion transport is investigated in the present work. The total tail ion transport will be the sum of the present collision-driven transport and the wave-driven transport, which is due to the ICRF-wave scatteri… more
Date: January 1, 1990
Creator: Chang, C.S. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences); Hammett, G.W. & Goldston, R.J. (Princeton Univ., NJ (USA). Plasma Physics Lab.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental development of nuclear pumped laser candidate for inertial confinement fusion driver

Description: A report is given on progress made during the second year of a three year contract studying the feasibility of nuclear pumping the atomic iodine laser. Experimental results are presented showing efficiencies of 25--38% at converting neutron-induced nuclear reaction energy in the excimer XeBr into UV photons which can be used to pump the laser. Parametric studies were done utilizing the {sup 10}B(n,{alpha}){sup 7}Li reaction, with three bromine donor chemicals, over a range of pressures and mix … more
Date: June 6, 1990
Creator: Miley, George H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The TITAN reversed-field-pinch fusion reactor study

Description: This report discusses research on the titan-1 fusion power core. The major topics covered are: titan-1 fusion-power-core engineering; titan-1 divertor engineering; titan-1 tritium systems; titan-1 safety design and radioactive-waste disposal; and titan-1 maintenance procedures.
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The TITAN reversed-field-pinch fusion reactor study

Description: This report discusses the following topics: overview of titan-2 design; titan-2 fusion-power-core engineering; titan-2 divertor engineering; titan-2 tritium systems; titan-2 safety design and radioactive-waste disposal; and titan-2 maintenance procedures.
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design study of a 7 kW, visible wavelength FEL

Description: The MIT Lincoln Laboratory is investigating the possibility of building a free electron laser (FEL) operating at an average power of about 7 kW at wavelengths of 500--600 nm. Additional specifications for the FEL include a bandwidth of less than 0.1 cm{sup {minus}1} and a micropulse separation of less than 10 ns. The design study has investigated the basic design parameters of the FEL including an analysis of the electron accelerator, beam line, wiggler and optical cavity. A nonlinear model of … more
Date: January 1, 1990
Creator: Chen, S.C.; Danly, B.G.; Temkin, R.J.; Wurtele, J. & Yang, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The TITAN reversed-field-pinch fusion reactor study

Description: This paper on titan plasma engineering contains papers on the following topics: reversed-field pinch as a fusion reactor; parametric systems studies; magnetics; burning-plasma simulations; plasma transient operations; current drive; and physics issues for compact RFP reactors.
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Multi-beam injector development at LBL

Description: LBL is developing a multi-beam injector that will be used for scaled accelerator experiments related to Heavy Ion Fusion. The device will produce sixteen 0.5 Amp beams of C+ at 2 MeV energy. The carbon arc source has been developed to the point where the emittance is within a factor of four of the design target. Modelling of the source behavior to find ways to reduce the emittance is discussed. Source lifetime and reliability is also of paramount importance to us and data regarding the lifetime… more
Date: June 1, 1990
Creator: Rutkowski, H. L.; Faltens, A.; Brodzik, D. A.; Johnson, R. M.; Pike, C. D.; Vanecek, D. L. (Lawrence Berkeley Lab., CA (United States)) et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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L to H mode transitions and associated phenomena in divertor tokamaks

Description: This is the final report for the research project titled L to H Mode Transitions and Associated Phenomena in Divertor Tokamaks.'' The period covered by this project is the fiscal year 1990. This report covers the development of Advanced Two Chamber Model.
Date: September 1, 1990
Creator: Punjabi, A. (Hampton Univ., VA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spectroscopic diagnostics of high temperature plasmas

Description: A three-year research program for the development of novel XUV spectroscopic diagnostics for magnetically confined fusion plasmas is proposed. The new diagnostic system will use layered synthetic microstructures (LSM) coated, flat and curved surfaces as dispersive elements in spectrometers and narrow band XUV filter arrays. In the framework of the proposed program we will develop impurity monitors for poloidal and toroidal resolved measurements on PBX-M and Alcator C-Mod, imaging XUV spectromet… more
Date: January 1, 1990
Creator: Moos, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Control of energetic ion confinement by ion cyclotron range of frequency waves

Description: It is shown that ICRF waves can induce fast convective radial transport of energetic ions in a tokamak geometry without affecting the background ion transport. Spatially inhomogeneous ICRF waves with directional parallel wave vectors are needed; otherwise, a net parallel flow of the energetic ions has to be present. 8 refs.
Date: February 1, 1990
Creator: Chang, C.S. (New York Univ., NY (USA). Courant Inst. of Mathematical Sciences)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simulations of plasma performance in a beam-driven tokamak fusion reactor with Q approx 2-3

Description: Supershot profiles were used to simulate plasmas in a neutral-beam driven tokamak reactor designed to achieve fusion energy production with Q {approx} 2-3. Profiles from a TFTR supershot were scaled to larger radii, density, and electron temperature. The TRANSP code was used to calculate performance of these plasmas. Examples are given of steady-state plasmas with large beam-driven bootstrap currents. The required energy transport rate is comparable to that in TFTR, but the particle transport r… more
Date: February 1, 1990
Creator: Budny, R.; Jassby, D. L.; Manickam, J.; McCune, D. & Wieland, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Accelerator-based intense neutron source for materials R D

Description: Accelerator-based neutron sources for R D of materials in nuclear energy systems, including fusion reactors, can provide sufficient neutron flux, flux-volume, fluence and other attractive features for many aspects of materials research. The neutron spectrum produced from the D-Li reaction has been judged useful for many basic materials research problems, and to be a satisfactory approximation to that of the fusion process. The technology of high-intensity linear accelerators can readily be appl… more
Date: January 1, 1990
Creator: Jameson, Robert A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(Fourth international conference on fusion reactor materials)

Description: This report summarizes the International Conference on Fusion Reactor Materials (ICFRM-4) which was held December 4--9, 1989, in Kyoto, Japan, as well as the results of several workshops, planning meetings, and laboratory visits made by the travelers. The ICFRM-4 is the major forum to present and exchange information on materials research and development in support of the world's fusion development efforts. About 360 papers were presented by the 347 conference attendees. Highlights of the confe… more
Date: January 24, 1990
Creator: Bloom, E. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Illumination of 3 and 4 hole spherical laser driven hohlraums

Description: We have considered what laser beam orientations entering static spherical hohlraums through three or four holes are needed to uniformly distribute the incident laser energy on the hohlraum wall. Each incident beam is characterized by its angle of incidence, i, with respect to the normal to the laser entrance hole. In the set of beams needed to cover the hohlraum interior, let i{sub min} be the minimum angle of incidence of beams in this set, i.e. the beam which most closely approaches the cente… more
Date: January 1, 1990
Creator: Wilson, D. C.; Wingate, C. A.; Mead, W. C. & McLeod, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Non-local kinetic transport studies of a field reversed configuration

Description: During this past period a computer code was developed to determine the global kinetic linear stability for a 1-D Field-Reversed Configuration (FRC). This report will describe the physical assumptions used to model the plasma, the equations solved by the code, the numerical analysis for certain aspects of the code, and some preliminary results from the code.
Date: January 1, 1990
Creator: Choi, Chan K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tunable excimer lasers

Description: The wide bandwidth nature of the rare-gas halide excimer transitions allow reasonable tuning of the laser oscillation wavelength that makes it useful for a number of applications. At the same time this wide bandwidth makes narrow band operation difficult and special techniques are needed to insure narrow frequency lasing as well as absolute frequency resettability. The author discusses briefly some of the classical frequency narrowing techniques and then goes on to some recent work that require… more
Date: January 1, 1990
Creator: Sze, R.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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(Medium energy meson research)

Description: In 1989, the research group's activities were divided into several components. The major activity was Experiment PS 197 at CERN-LEAR with the Crystal Barrel detector. This report will deal mainly with the results of our experiment to date and the future of the program at LEAR. The second effort was the completion of several projects which are in the data analysis and publication phase: muon-catalyzed fusion, which will be the thesis of Tom Case; muon decay {eta} parameter, the thesis of Roy Bos… more
Date: January 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Resistive Wall Modes in the Reversatron II RFP

Description: The Reversatron 2 RFP (R/a=50cm/8cm) has been operated with interchangeable shells to investigate resistive wall modes. Shell penetration times are 610, 100, and 4 {mu}sec (no shell). With the 610 {mu}sec shell, the plasma current is {le} 65 kA and the duration {le} 550 {mu}sec. With no shell, helium discharges are more resistive and hydrogen discharges cannot be sustained. An m=1, n=-6 mode resonant on axis grows to a relative amplitude of 20% during the setting-up phase. With the 100{mu}sec s… more
Date: January 1, 1990
Creator: Barrick, G.; Greene, P. & Robertson, S.
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Partner: UNT Libraries Government Documents Department
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Mechanical property changes and microstructures of dispersion-strengthened copper alloys after neutron irradiation at 411, 414, and 529 degree C

Description: Dispersion strengthened copper alloys have shown promise for certain high heat flux applications in both near term and long term fusion devices. This study examines mechanical properties changes and microstructural evolution in several oxide dispersion strengthened alloys which were subjected to high levels of irradiation-induced displacement damage. Irradiations were carried out in FFTF to 34 and 50 dpa at 411--414{degree}C and 32 dpa at 529{degree}C. The alloys include several oxide dispersio… more
Date: June 1, 1990
Creator: Anderson, K.R.; Stubbins, J.F. (Illinois Univ., Urbana, IL (USA)); Garner, F.A. & Hamilton, M.L. (Pacific Northwest Lab., Richland, WA (USA))
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Partner: UNT Libraries Government Documents Department
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Lithium mass transport in ceramic breeder materials

Description: The objective of this activity is to measure the lithium vaporization from lithium oxide breeder material under differing temperature and moisture partial pressure conditions. Lithium ceramics are being investigated for use as tritium breeding materials. The lithium is readily converted to tritium after reacting with a neutron. With the addition of 1000 ppM H{sub 2} to the He purge gas, the bred tritium is readily recovered from the blanket as HT and HTO above 400{degree}C. Within the solid, tr… more
Date: January 1, 1990
Creator: Blackburn, P. E. & Johnson, C. E.
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Partner: UNT Libraries Government Documents Department
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Nickel-like soft x-ray lasers at 44. 8 Angstrom and 43. 1 Angstrom

Description: Predictions for the gains of the 4p-4d laser lines (0-1, 2-1, 1-1) in Nickel-like Ta and W are compared to the results of experiment. Effects which can resolve the discrepancies are pointed out. 11 refs., 3 figs., 1 tab.
Date: January 1, 1990
Creator: Maxon, S.; MacGowan, B.; Dalhed, S.; Osterheld, A.; London, R. A.; Rosen, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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