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An improved time-of-flight ion charge state diagnostic

Description: A time-of-flight diagnostic for analysis of relatively low energy ion beams is described. The system incorporates several novel features which improve its performance in a number of ways. The technique is simple and can provide an alternative to magnetic analysis of ion beams for the determination of ion charge state and beam composition.
Date: March 1, 1987
Creator: Brown, I.G.; Galvin, J.E.; MacGill, R.A. & Wright, R.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Status of the MEVVA (Metal Vapor Vacuum Arc) high current metal ion source. [Metal Vapor Vacuum Arc]

Description: The MEVVA (Metal Vapor Vacuum Arc) ion source that has been developed at LBL was reported on for the first time at the 1985 Particle Accelerator Conference (1). This source can produce hundreds of milliamperes of beam current of metal species from lithium up to uranium. In the period since then we have developed the source further, and this work is summarized here. We have now run the source with over 30 different beam species, and with an extraction voltage up to 110 kV. We have made and opera… more
Date: March 1, 1987
Creator: Brown, I.G.; Galvin, J.E.; MacGill, R.A. & Wright, R.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

On the Current Intensity Limit of a Vacuum Arc Ion Source

Description: The maximum ion current that can be produced as a high energy beam from a metal vapor vacuum arc ion source is considered. Results are presented of measurements of the plasma ion current in the MEVVA II ion source. It is shown that this source is an efficient generator of metal ions, an intense flux of which is efficiently transported to the beam extractor. The maximum metal ion current that is available for extraction at the extractor location is 5% of the arc current. The limitation to the in… more
Date: March 1987
Creator: Brown, I. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The SuperHILAC heavy ion intensity upgrade

Description: A high current MEtal Vapor Vacuum Arc (MEVVA) ion source is to be installed in the third injector (Abel) at the SuperHILAC, representing the first accelerator use of this novel ion source. The MEVVA source has produced over 1 A of uranium in all charge states, with more than 100 electrical mA (emA) of U/sup 5 +/. Transport of the space-charge dominated beam through the charge-state analysis dipole will be enhanced by a 100 kV extractor voltage and neutralization by secondary electrons. In addit… more
Date: March 1, 1987
Creator: Feinberg, B. & Brown, I.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High dose uranium ion implantation into silicon

Description: Implantation of uranium ions into silicon to a maximum dose of 6 x 10/sup 16/ atoms/cm/sup 2/, with a maximum concentration of 6 x 10/sup 21/ atoms/cm/sup 3/, has been carried out. This concentration corresponds to 12 at. % of uranium in the silicon host material. The implanted uranium content was measured by Rutherford backscattering and confirmed by a measurement of the alpha-particle activity of the buried uranium layer. The range and straggling of the uranium, and sputtering of the silicon … more
Date: May 1, 1987
Creator: Brown, I.G.; Galvin, J.E. & Yu, K.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Multiply stripped ion generation in the metal vapor vacuum arc

Description: We consider the charge state distribution of ions produced in the metal vapor vacuum arc plasma discharge. A new kind of high current metal ion source in which the ion beam is extracted from a metal vapor vacuum arc plasma has been used to obtain the spectra of multiply charged ions produced within the cathode spots. The cathode materials used and the species reportetd on here are: C, Mg, Al, Si, Ti, Cr, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Rh, Pd, Ag, In, Sn, Gd, Ho, Ta, W, Pt, Au, Pb, Th, and U; t… more
Date: September 1, 1987
Creator: Brown, I.G.; Feinberg, B. & Galvin, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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