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Remote servicing features of two new mirror fusion reactors

Description: Several general approaches to remote servicing are briefly described for the LLL Field Reversed Mirror and Tandem Mirror Fusion reactors. Remote servicing system design considerations for the blanket module are briefly discussed. (RME)
Date: April 20, 1977
Creator: Neef, W.S. Jr.
Partner: UNT Libraries Government Documents Department
open access

Materials testing using laser energy deposition

Description: A convenient method for determining the elastic constants of materials has been devised using the energy from a Q-switched neodymium-glass laser. Stress waves are induced in materials having circular rod or rectangular bar geometries by the absorption of energy from the laser. The wave transit times through the material are recorded with a piezoelectric transducer. Both dilatation and shear wave velocities are determined in a single test using an ultrasonic technique and these velocities are us… more
Date: December 20, 1977
Creator: Wilcox, W.W. & Calder, C.A.
Partner: UNT Libraries Government Documents Department
open access

Position and profile of a multiampere proton beam

Description: The spacial profile of a bunched or unbunched proton beam may be found by using a highly collimated molecular beam of N/sub 2/. A certain fraction of the molecular N/sub 2/ will be ionized as it crosses the proton beam. By measuring the N/sub 2//sup +/ current as a function of theta the cross section of the beam is directly obtained. As an example, a 10 A proton beam of diameter 1 mm is considered.
Date: October 20, 1977
Creator: Edwards, D. Jr.
Partner: UNT Libraries Government Documents Department
open access

Directions for possible upgrades of the Mirror Fusion Test Facility (MFTF)

Description: The Mirror Fusion Test Facility (MFTF) may be upgraded by extending the time of plasma sustenance in an approach to steady-state operation and/or by increasing the neutral-beam injection energy. Some parameter bounds for these upgrades are discussed as they relate to a definition of the required neutral-beam development.
Date: December 20, 1977
Creator: Damm, C. C.; Coensgen, F. H.; Devoto, R. S.; Molvik, A. W.; Porter, G. D.; Shearer, J. W. et al.
Partner: UNT Libraries Government Documents Department
open access

Formation processes and secondary emission coefficients for H/sup -/ production on alkali-coated surfaces

Description: The formation of negative ions by hydrogen collisions on cesium-coated surfaces is discussed in the limiting cases where the resident cesium is either in the purely ionic state or in the purely atomic state. The survival fraction for negative ions moving away from a metal surface is calculated using a method employing complex eigenvalues. The fraction of surviving ions is found to be larger than calculated by previous workers. The secondary emission coefficient for negative ion production by in… more
Date: September 20, 1977
Creator: Hiskes, J.R. & Karo, A.
Partner: UNT Libraries Government Documents Department
open access

Elimination of image blurring due to double scatter events in. gamma. imaging MWPC detectors

Description: In multiwire proportional chambers used with honeycomb lead converters for detecting 511 KeV ..gamma.. rays from positron annihilation, a source of image blurring is generated by multiple interaction events due to the escape photoelectric x-ray or from the Compton scattered photon. Using the delay line readout method the majority of these double events are eliminated by using the fact that the sum of the time intervals from the prompt anode signal to the signal arrival at each end of the delay … more
Date: October 20, 1977
Creator: Ortendahl, D.; Tam, K.C.; Perez-Mendez, V. & Lim, C.B.
Partner: UNT Libraries Government Documents Department
open access

Long-life cathode for the Berkeley-type ion source

Description: Preliminary experiments indicate that a hollow cathode, made from impregnated tungsten emitters, can be adapted for the Lawrence Berkeley Laboratory (LBL)/Lawrence Livermore Laboratory (LLL) ion source. Such cathodes could be the basis of a long life, continuously operated positive-ion source.
Date: October 20, 1977
Creator: Fink, J.H. & Biagi, L.A.
Partner: UNT Libraries Government Documents Department
open access

National waste terminal storage program

Description: Papers are presented on research programs concerned with underground storage of radioactive wastes. A separate abstract was prepared for each of twenty-three papers. (JRD)
Date: August 20, 1977
Partner: UNT Libraries Government Documents Department
open access

Low aspect ratio double shells for high density and high gain

Description: Double shell targets for use with 0.2-1.0 ..mu.. lasers are discussed. With 0.2 ..mu.. light, such designs achieve 500-1000 times liquid density at 2 KJ, 10% or more of breakeven at 15 KJ, gains of 10 or more at 200 KJ and a gain of 1000 for lasers of 1 to 10 megajoules.
Date: September 20, 1977
Creator: Lindl, J.D.
Partner: UNT Libraries Government Documents Department
open access

Review of mirror fusion reactor designs

Description: Three magnetic confinement concepts, based on the mirror principle, are described. These mirror concepts are summarized as follows: (1) fusion-fission hybrid reactor, (2) tandem mirror reactor, and (3) reversed field mirror reactor. (MOW)
Date: April 20, 1977
Creator: Bender, D. J.
Partner: UNT Libraries Government Documents Department
open access

Prospects for a DD tandem mirror

Description: The possibility of burning advanced fusion fuels in a tandem mirror is considered for a catalyzed DD cycle, in which the T and /sup 3/He reaction products from DD burn in both the solenoid and plugs are reinjected for complete burnup: 3D ..-->.. p + /sup 4/He + n + 21.6 MeV. Classical radial transport of the /sup 4/He ash determines the steady state alpha fraction in the solenoid. Synchrotron radiation losses are minimized at high beta, such that charged particle fusion power recovered in a dir… more
Date: June 20, 1977
Creator: Logan, B. G.
Partner: UNT Libraries Government Documents Department
open access

Residual stress and strain examination in Peach Bottom fuel test elements

Description: An examination of residual stresses and strains has been carried out experimentally on structural graphite components removed from Peach Bottom High-Temperature Gas-Cooled Reactor (HTGR) fuel elements. The purpose of this work is to confirm predicted stress distributions. Twenty-nine teledial fuel elements (of six- and eight-hole design) were irradiated in the Peach Bottom HTGR to fluences of less than or equal to 4 x 10/sup 25/ n/m/sup 2/ (E greater than 29 fJ) and time-average temperatures up… more
Date: May 20, 1977
Creator: Wallroth, C. F.; Miller, C. M. & Saurwein, J. J.
Partner: UNT Libraries Government Documents Department
open access

Acceleration of solid macro-particles by laser produced ablation

Description: The laser acceleration of small (mass of order 1 gram) solid particles has been computationally analyzed. Acceleration is caused by a one sided laser illumination of a solid particle producing heating of the material, an ablation wave and the resulting ablative reaction force. Laser intensity is constrained to produce an ablation pressure less than the yield strength of the material (typically a few kbar). Preliminary results indicate the possibility of converting absorbed laser energy to solid… more
Date: September 20, 1977
Creator: McCann, T. E. & DeGroot, J. S.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of large, multifilament Nb/sub 3/Sn conductors with a new 12-Telsa tensile test apparatus

Description: A large cryogenic tensile test apparatus has been constructed at the Lawrence Livermore Laboratory (LLL) as part of the Nb/sub 3/Sn conductor program. This equipment was designed so that mechanical measurements can be made at 300, 77, or 4.2 K and critical current can be measured under simulated operating conditions as a function of the strain on large, prototype conductors for fusion magnets. The maximum operating parameters of the machine are load = 2.23 x 10/sup 5/ N, magnetic field = 12 T, … more
Date: June 20, 1977
Creator: Deis, D. W.; Hirzel, D. G.; Rosdahl, A. R.; Roach, D. R.; Freynik, H. S. Jr. & Zbasnik, J. P.
Partner: UNT Libraries Government Documents Department
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