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Comments on septa and other small production angle magnets

Description: A discussion is given of possible septum magnet parameters for small production angle experiments in the ISABELLE storage rings. Superconducting septa and torroidal septa are also considered. (PMA)
Date: August 25, 1977
Creator: Allinger, J.; Danby, G. & Jackson, J.
Partner: UNT Libraries Government Documents Department
open access

Estimates of post-acceleration longitudinal bunch compression

Description: A simple analytic method is developed, based on physical approximations, for treating transient implosive longitudinal compression of bunches of heavy ions in an accelerator system for ignition of inertial-confinement fusion pellet targets. Parametric dependences of attainable compressions and of beam path lengths and times during compression are indicated for ramped pulsed-gap lines, rf systems in storage and accumulator rings, and composite systems, including sections of free drift. It appear… more
Date: November 25, 1977
Creator: Judd, D.L.
Partner: UNT Libraries Government Documents Department
open access

Time-dependent properties of fiber composites for energy-storage flywheels

Description: Time-dependent deformation and time-dependent strength are being characterized for several candidate polymeric composites for flywheels. This presentation highlights the motivation and the philosophy of the characterization adopted by the authors in establishing the ongoing programs at LLL. This overview is intended to provide a basis for inferring the type of enginering data being generated for different aspects of flywheel design. The details of these data can be obtained from the published r… more
Date: October 25, 1977
Creator: Wu, E.M. & Penn, L.S.
Partner: UNT Libraries Government Documents Department
open access

Magnetic mirror fusion program

Description: The past, present, and future thrusts of the magnetic mirror fusion program at LLL are reviewed. Neutral beam injection, stabilization, and density-lifetime product results from the 2XIIB experiment are briefly highlighted. The rationale of the Tandem Mirror Experiment and Field Reversed Mirror Experiment now under way are discussed. Plans for the Mirror Fusion Test Facility (MFTF) are described. Approaches to improvement of particle containment in mirror fusion systems are briefly indicated. (… more
Date: October 25, 1977
Creator: Fowler, T.K.
Partner: UNT Libraries Government Documents Department
open access

Mechanical design aspects of a tandem mirror fusion reactor

Description: Two ''plugs'' of dense plasma at either end of a central solenoid cell form the basis of a new mirror fusion power plant concept. A central cell blanket design is presented. Modules on crawler tracks serviced by remote welding and handling machines of very simple design are important features resulting from linear axisymmetric geometry. Three blanket designs are considered and the best one presented in some detail. It has lithium as the breeder material, helium cooled. ''Plug'' magnet field str… more
Date: April 25, 1977
Creator: Neef, W. S. Jr.
Partner: UNT Libraries Government Documents Department
open access

Large-scale cryopumping for controlled fusion

Description: Vacuum pumping by freezing out or otherwise immobilizing the pumped gas is an old concept. In several plasma physics experiments for controlled fusion research, cryopumping has been used to provide clean, ultrahigh vacua. Present day fusion research devices, which rely almost universally upon neutral beams for heating, are high gas throughput systems, the pumping of which is best accomplished by cryopumping in the high mass-flow, moderate-to-high vacuum regime. Cryopumping systems have been dev… more
Date: July 25, 1977
Creator: Pittenger, L. C.
Partner: UNT Libraries Government Documents Department
open access

Role of space charge in beam transport. [Review]

Description: Space charge as it affects ion beam transport is reviewed. The approach here will be to derive beam-current criteria for divergence from space charge, review recent theoretical models for fractional space-charge neutralization, discuss space-charge-related observations on ion-beam transport in a specific experimental system, and briefly note several applications using space charge. Experimental measurements of effective space charge are discussed for a dc ion-source test stand using a 90/sup 0/… more
Date: March 25, 1977
Creator: Osher, J. E.
Partner: UNT Libraries Government Documents Department
open access

Geochemistry of Delaware Basin groundwaters

Description: Fluids from various formations were sampled and analyzed in order to characterize groundwaters in the Delaware Basin. Waters were analyzed for solute content and/or stable isotope ratios (D/H and /sup 18/O//sup 16/O). Three lines of geochemical arguments are summarized, in order to present the natures and probable origins of analyzed fluids: solute chemistry, thermodynamic modelling of low-temperature aqueous species, and stable isotope ratios. (JGB)
Date: April 25, 1977
Creator: Lambert, S. J.
Partner: UNT Libraries Government Documents Department
open access

Obfuscatory measurement

Description: ''Obfuscatory measurement'' is the practice, deliberate or not, of obscuring the true performance of a system through the use of misleading measures. Many of the traditional and widely used measures of computer system performance are obfuscatory: they measure the wrong things, the right things wrongly, or nothing at all. Several obfuscatory measures are considered; those aspects of the system they are thought to measure are contrasted with those that they actually measure; and alternative measu… more
Date: July 25, 1977
Creator: Stevens, D. F.
Partner: UNT Libraries Government Documents Department
open access

Problems with rho R measurements: what are the ways out

Description: An important scaling parameter or figure of merit in inertially-confined fusion is the maximum fuel rho R achieved by the target--rho is the density, and R the radius of the fuel. Every technique used, thus far, in laser-initiated-fusion-microexplosion experiments to obtain this data had major deficiencies. We examine critically the merits of the various possible methods of measuring fuel rho R and their ranges of applicability.
Date: October 25, 1977
Creator: Pan, Y. L. & Larsen, J. T.
Partner: UNT Libraries Government Documents Department
open access

Thermal expansion of metals over the entire liquid range

Description: This paper reviews the current state of the art for measuring liquid metal densities. Conventional high precision techniques for use below 2000K as well as new techniques for more extreme temperatures are addressed. Pertinent data, which have appeared since the last critical reviews, for elemental metals are discussed.
Date: August 25, 1977
Creator: Shaner, J. W.
Partner: UNT Libraries Government Documents Department
open access

Geothermal environmental overview project

Description: The basic purpose of the Geothermal Environmental Overview Project is to summarize and assess the state of environmental issues of the top priority KGRAs from among the 37 KGRAs currently identified by the Division of Geothermal Energy as having possibility for commercial development. The objectives of the Overview Project are inventory of available data, assessment of available data, identification of data gaps, and identification of key issues. (JGB)
Date: October 25, 1977
Creator: Anspaugh, Lynn R.
Partner: UNT Libraries Government Documents Department
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