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Plasma experiments with 1. 06. mu. m lasers at Lawrence Livermore Laboratory

Description: Recent laser fusion experiments at Lawrence Livermore Laboratory have provided basic data concerning laser beam propagation and absorption in high temperature plasmas, electron energy transport processes that transfer the absorbed laser energy to the high density ablation region, the general fluid dynamic expansion and compression of the heated plasma, and the processes responsible for the production of 14 MeV neutrons during implosion experiments. This paper reports results related to the prop… more
Date: March 12, 1976
Creator: Alhlstrom, H. G.; Holzrichter, J. F.; Haas, R. A.; Storm, E. K.; Manes, K. R.; Phillion, D. W. et al.
Partner: UNT Libraries Government Documents Department
open access

Energy storage and power conditioning system for the Shiva laser

Description: An optimal energy delivery system for the world's largest glass laser system has been designed based on computer modeling and operation of laser hardware. Components of the system have been tested on operating lasers at LLL. The Shiva system is now under construction and will be completed in 1977. The energy supply described here will provide cost-effective, reliable power and facilitate the gathering of data in pursuit of controlled thermonuclear reactions. (auth)
Date: November 12, 1975
Creator: Allen, G. R.; Gagnon, W. L.; Rupert, P. R. & Trenholme, J. B.
Partner: UNT Libraries Government Documents Department
open access

In-duct countermeasures for reducing fire-generated-smoke-aerosol exposure to HEPA filters. [High efficiency particulate aerosol]

Description: An experimental program was conducted to assess the endurance and lifetime of HEPA filters exposed to fire-generated aerosols, and to reduce the aerosol exposure by installing engineering countermeasures in the duct between the fire source and HEPA filters. Large cribs of wood and other potential fuels of interest were ''forcefully burned'' in a partially ventilated enclosure. In a ''forceful burn'' the crib of fuel is continuously exposed to an energetic premixed methane flame during the entir… more
Date: July 12, 1978
Creator: Alvares, N. J.; Beason, D. G. & Ford, H. W.
Partner: UNT Libraries Government Documents Department
open access

Status of tandem mirror theory

Description: This report contains the text and slides used for the review talk on tandem mirror theory presented at the meeting of the Division of Plasma Physics, A.P.S., Boston, MA, November 12-16, 1979. Topics covered include classical confinement, equilibria, MHD- and micro-stability, radial transport, and thermal barriers.
Date: December 12, 1979
Creator: Baldwin, D.E.
Partner: UNT Libraries Government Documents Department
open access

Compact 5 x 10/sup 12/ AMP/SEC rail-gun pulser for a laser plasma shutter

Description: We have developed a rail-gun plasma source to produce a plasma of 10/sup 12/cm/sup -3/ particle density and project it with a velocity of 3.9 cm/..mu..s. This device will be used in a output spatial filter of Nova to project a critical density plasma across an optical beam path and block laser retroreflected light. The object of this paper is to describe the design of a pulser appropriate to the Shiva laser fusion facility, and to describe the preliminary design of a higher current prototype pu… more
Date: June 12, 1979
Creator: Bradley, L. P.; Orham, E. L. & Stowers, I. F.
Partner: UNT Libraries Government Documents Department
open access

Electron-beam pumping of visible and ultraviolet gas lasers

Description: Several techniques for using direct electron-pumping of gas lasers are reviewed. The primary objective is to categorize pump geometries and to give guidelines for gun selection and pulser design. Examples and application of pump technology are given. (auth)
Date: September 12, 1975
Creator: Bradley, Laird P.
Partner: UNT Libraries Government Documents Department
open access

MFTF supervisory control and diagnostics system hardware

Description: The Supervisory Control and Diagnostics System (SCDS) for the Mirror Fusion Test Facility (MFTF) is a multiprocessor minicomputer system designed so that for most single-point failures, the hardware may be quickly reconfigured to provide continued operation of the experiment. The system is made up of nine Perkin-Elmer computers - a mixture of 8/32's and 7/32's. Each computer has ports on a shared memory system consisting of two independent shared memory modules. Each processor can signal other … more
Date: November 12, 1979
Creator: Butner, D.N.
Partner: UNT Libraries Government Documents Department
open access

Applying a Compensated Pulsed Alternator to a flashlamp load for NOVA

Description: The Compensated Pulsed Alternator (CPA) is a large rotating machine that will convert mechanical, rotationally stored energy into a single electrical impulse of very high power. It is being optimized for driving flashlamps in the very large NOVA Nd:glass laser system. The machine is a rotary flux compression device, and for maximum performance, it requires start-up current. We report upon a circuit that will provide this current and that will also assist in triggering the flashlamps. This circu… more
Date: June 12, 1979
Creator: Carder, B. M. & Merritt, B. T.
Partner: UNT Libraries Government Documents Department
open access

Balanced, parallel operation of flashlamps

Description: A new energy store, the Compensated Pulsed Alternator (CPA), promises to be a cost effective substitute for capacitors to drive flashlamps that pump large Nd:glass lasers. Because the CPA is large and discrete, it will be necessary that it drive many parallel flashlamp circuits, presenting a problem in equal current distribution. Current division to +- 20% between parallel flashlamps has been achieved, but this is marginal for laser pumping. A method is presented here that provides equal curren… more
Date: June 12, 1979
Creator: Carder, B. M. & Merritt, B. T.
Partner: UNT Libraries Government Documents Department
open access

Field-reversed mirror reactor

Description: The reactor design is a multicell arrangement wherein a series of field-reversed plasma layers are arranged along the axis of a long superconducting solenoid which provides the background magnetic field. Normal copper mirror coils and Ioffe bars placed at the first wall radius provide shallow axial and radial magnetic wells for each plasma layer. Each of 11 plasma layers requires the injection of 3.6 MW of 200 keV deuterium and tritium and produces 20 MW of fusion power. The reactor has a net e… more
Date: September 12, 1978
Creator: Carlson, G.A.
Partner: UNT Libraries Government Documents Department
open access

Superconducting magnets for mirror machines

Description: The simple mirror configuration, consisting of a long solenoid with increased field strength at the ends (magnetic mirrors), proved to be an unstable plasma container and was replaced by the minimum absolute value of B mirror configuration. The Yin-Yang minimum absolute value of B coil was chosen for the Mirror Fusion Test Facility (MFTF) experiment and recent conceptual designs of standard mirror reactors. For the multicell field-reversed mirror reactor concept we returned to the long solenoid… more
Date: September 12, 1978
Creator: Carlson, G.A.
Partner: UNT Libraries Government Documents Department
open access

Mirror fusion reactor study

Description: The principal features of a fusion power reactor employing the magnetic mirror confinement concept are described. A parametric design and cost estimate analysis has been used to optimize the design for minimum capital cost per net electric output. Optimized parameters include the vacuum mirror ratio, the injection energy and angle, the choice of a thermal conversion cycle, and the design efficiency of the charged particle direct converter. The sensitivity of the cost of power for the optimized … more
Date: November 12, 1975
Creator: Carlson, G.A. & Moir, R.W.
Partner: UNT Libraries Government Documents Department
open access

Efficient lensing element for x-rays. [Blazed Fresnel Phase Plate]

Description: An efficient x-ray lens with an effective speed of order less than approximately f/50 for lambda greater than approximately 10 A x-rays is described. Fabrication of this lensing element appears feasible using existing microfabrication technology. Diffraction and refraction are coupled in a single element to achieve efficient x-ray concentration into a single order focal spot. Diffraction is used to produce efficient ray bending (without absorption) while refraction is used only to provide appro… more
Date: August 12, 1977
Creator: Ceglio, N.M. & Smith, H.I.
Partner: UNT Libraries Government Documents Department
open access

Date base management system for the MFTF

Description: The data base management system (DBMS) for the Mirror Fusion Test Facility (MFTF) is described as relational in nature and distributed across the nine computers of the supervisory control and diagnostics system. This paper deals with a reentrant runtime package of routines that are used to access data items, the data structures to support the runtime package, and some of the utilities in support of the DBMS.
Date: November 12, 1979
Creator: Choy, J. H. & Wade, J. A.
Partner: UNT Libraries Government Documents Department
open access

Comparison of Doppler broadening method

Description: No Description Available.
Date: March 12, 1975
Creator: Cullen, D.E.; Weisbin, C.R.; Wright, R.Q. & White, J.E.
Partner: UNT Libraries Government Documents Department
open access

MFTF plasma diagnostics data acquisition system

Description: The initial goal of the Data Acquisition System (DAS) is to control 11 instruments chosen as the startup diagnostic set and to collect, process, and display the data that these instruments produce. These instruments are described in a paper by Stan Thomas, et. al. entitled ''MFTF Plasma Diagnostics System.'' The DAS must be modular and flexible enough to allow upgrades in the quantity of data taken by an instrument, and also to allow new instruments to be added to the system. This is particular… more
Date: November 12, 1979
Creator: Davis, G.E. & Coffield, F.E.
Partner: UNT Libraries Government Documents Department
open access

Beam-line cryopump

Description: A cryopumping module using metallic surfaces at liquid helium temperature for condensation of hydrogen and deuterium gas has been constructed. This pump, a prototype of four units which will provide pumping for the Livermore 200 kV test stand, will be used to verify the concept and establish engineering parameters. Upon completion of engineering tests and evaluation the pump will be installed in an operating beam line. The design point pumping capacity is 80,000 liters per second for hydrogen a… more
Date: November 12, 1975
Creator: Duffy, T.J. & Oddon, L.D.
Partner: UNT Libraries Government Documents Department
open access

Sustaining neutral beam power supply system for the Mirror Fusion Test Facility

Description: A fixed-price procurement contract for $24.9 million was awarded to Aydin Energy Division, Palo Alto, CA, for the design, manufacture, installation, and acceptance testing of the sustaining neutral beam power supply system (SNBPSS). This system is scheduled for completion in early 1981 and will provide the conditioned power for the 24 neutral beam source modules. Each of the 24 power supply sets will provide the accel potential of 80 kV at 88 A, the arc power, the filament power, and the suppre… more
Date: November 12, 1979
Creator: Eckard, R.D. & Van Ness, H.W.
Partner: UNT Libraries Government Documents Department
open access

Test and evaluation of the BBC CQK 200-4 modulator tube for the MFTF sustaining neutral beam power supply system

Description: The BBC CQK 200-4 Tube was tested by Aydin at LLL, to confirm that it would switch 90 kV after conducting 88 amperes for 30 seconds. The CQK 200-4 is a recent modification of the CQK 200-3, an Rf transmitter tube designed for continuous loading, to increase the anode hold-off voltage to 150 kV. During the design life of the tube it will be subjected to 10/sup 5/ to 10/sup 6/ cyclic thermal loads. Two concerns are that (1) during the 30 second high current load, the screen grid may have excessiv… more
Date: November 12, 1979
Creator: Eckard, R.D.; Van Ness, H.W. & Hesselgrave, D.
Partner: UNT Libraries Government Documents Department
open access

Free stream jet for high power dye lasers

Description: No Description Available.
Date: May 12, 1975
Creator: Foley, R. J.; Kuklo, T. C. & Peterson, O. G.
Partner: UNT Libraries Government Documents Department
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