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Proposed LLNL electron beam ion trap

Description: The interaction of energetic electrons with highly charged ions is of great importance to several research fields such as astrophysics, laser fusion and magnetic fusion. In spite of this importance there are almost no measurements of electron interaction cross sections for ions more than a few times ionized. To address this problem an electron beam ion trap (EBIT) is being developed at LLNL. The device is essentially an EBIS except that it is not intended as a source of extracted ions. Instead … more
Date: July 2, 1985
Creator: Marrs, R.E.; Egan, P.O.; Proctor, I.; Levine, M.A.; Hansen, L.; Kajiyama, Y. et al.
Partner: UNT Libraries Government Documents Department
open access

Increasing the energy of SLC by transient wake field

Description: Here the authors present a possible way to further increase the energy of SLAC single bunch from 50 GeV to 65 GeV or even more, without increasing the rf peak power and accelerator length.
Date: July 2, 1985
Creator: Yao, C.G.
Partner: UNT Libraries Government Documents Department
open access

Reactor issues for tandem mirrors operating in the negative-potential mode

Description: During 1985, interest has been revived at LLNL in tandem mirrors operating in the negative-potential mode. The negative tandem is formed by combining ECRH-sustained hot electron end cell plasmas with pumping mechanisms to remove trapped ions from the end cells. No sloshing ions are required. The resulting negative potential in the end cells confines the central cell electrons. The requirement of charge neutrality causes the ambipolar potential of the central cell to become negative relative to … more
Date: December 2, 1985
Creator: Perkins, L.J. & Campbell, R.B.
Partner: UNT Libraries Government Documents Department
open access

Physics and design issues of a high gain FEL

Description: A series of viewgraphs is provided that summarize and illustrate some of the physics aspects and design issues of free electron lasers. Physics aspects include the coupling between electrons and light, electron beam properties that affect the free electron laser, and tapering of the wiggler. Design issues include focusing and mismatched electron orbit, as well as diffraction. Modelling of the free electron laser and scaling are also mentioned. (LEW)
Date: October 2, 1985
Creator: Prosnitz, Donald
Partner: UNT Libraries Government Documents Department
open access

Ceramic subsurface marker prototypes

Description: The client submitted 5 sets of porcelain and stoneware subsurface (radioactive site) marker prototypes (31 markers each set). The following were determined: compressive strength, thermal shock resistance, thermal crazing resistance, alkali resistance, color retention, and chemical resistance.
Date: May 2, 1985
Creator: Lukens, C. E.
Partner: UNT Libraries Government Documents Department
open access

Report of the task force on low-temperature magnet operation

Description: The task force has studied two options for an 8 T ring operating at 2 K. In the first of these the synchrotron light load is taken at 2 K, and in the second it is intercepted on a bore liner at 4.5 K. The possibility of staged construction of the 20 Tev, 8 T, 2 K ring with initial operation at 15 Tev, 6 T and 4.5 K has also been considered. A set of dimensions and specifications has been developed for each of the two 8 T options in the three categories: magnets, cryostat, and refrigeration syst… more
Date: July 2, 1985
Partner: UNT Libraries Government Documents Department
open access

Hawaiian Monk Seal Population Structure, Reproduction, and Survival on Laysan Island, 1985

Description: This is a report based on an observational study over the population of the endangered Hawaiian monk seal on Laysan Island in the Northwestern Hawaiian Islands. This examination took place between March 2 and November 30, 1985.
Date: 1985-03-02/1985-11-30
Creator: Johanos, Thea C. & Austin, Susan L.
Partner: UNT Libraries Government Documents Department
open access

A Chromatic Correction Scheme for the RHIC3 Lattice

Description: This report is about the Chromatic Correction Scheme for the RHIC3 Lattice. The RHIC3 is the current design for the relativistic heavy ion collider.
Date: January 2, 1985
Creator: Antillon, Armando
Partner: UNT Libraries Government Documents Department
open access

Iris tilting and RF steering in the SLAC Linac

Description: For some time now, the sources of RF transverse beam steering in the SLAC Linac have been a mystery. The previously known sources, coupler asymmetries and survey misalignment, have predicted deflections which are frequently much smaller than the observed deflections. A new source of RF steering has been discovered: the tilting of accelerator irises. Measurements of iris tilting in a forty foot accelerator girder are compared with measurements of RF beam deflections and are found to be strongly … more
Date: May 2, 1985
Creator: Seeman, J. T.
Partner: UNT Libraries Government Documents Department
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