Results 261 to 270 of about 333,485 (307)

An advanced negative hydrogen ion source

Review of Scientific Instruments, 2015
The results of investigation of emission productivity of negative particles source with cesiated combined discharge are presented. A cylindrical beam of negative hydrogen ions with density about 2 A/cm2 in low noise mode on source emission aperture is obtained.
Alexey A, Goncharov, Andrey N, Dobrovolsky, Victor P, Goretskii   +2 more
openaire   +2 more sources

A negative ion source test facility

Review of Scientific Instruments, 2015
Progress is being made in the development of an Ion Source Test Facility (ISTF) by D-Pace Inc. in collaboration with Buckley Systems Ltd. in Auckland, NZ. The first phase of the ISTF is to be commissioned in October 2015 with the second phase being commissioned in March 2016.
S. Melanson, M. Dehnel, D. Potkins, J. Theroux, C. Hollinger, J. Martin, C. Philpott, T. Stewart, P. Jackle, P. Williams, S. Brown, T. Jones, B. Coad, S. Withington   +13 more
openaire   +2 more sources

Negative-ion sources for ion implantation

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1991
Abstract The development of negative-ion sources has now reached the state where they can be considered for implanter applications. In the following paper a conceptual negative-ion source is described, based on production by dissociative attachment in the plasma.
A.J.T. Holmes, G. Proudfoot
openaire   +1 more source

Numerical analysis of negative ion temperature in a negative ion source

Review of Scientific Instruments, 2004
To understand the origin of the two energy groups of volume produced H− ions observed in the multicusp, hybrid-type H− ion source (Camembert III), numerical analysis by the three-dimensional Monte Carlo simulation code has been done. Realistic multicusp geometry and the electric field near the filament are taken into account in the model.
A. Hatayama, K. Makino, T. Sakurabayasi, K. Miyamoto, M. Ogasawara, M. Bacal   +5 more
openaire   +1 more source

RF Negative Ion Sources and Polarized Ion Sources

2016
The requirement of a neutral beam injection system with hydrogen or deuterium beam energy up to 1 MeV for the ITER project has recently triggered new research on negative ion sources, from production to acceleration and neutralization before the injection in the tokamak.
N. Ippolito, F. Taccogna, P. Minelli, V. Variale, N. Colonna   +4 more
openaire   +1 more source

Negative-ion plasma sources

Review of Scientific Instruments, 1988
Three designs for negative-ion plasma sources are described. Two sources utilize metal hexafluorides such as SF6 and WF6 to scavenge electrons from electron-ion plasmas and the third relies upon surface ionization of alkali halide salts on heated alumina and zirconia.
D. P. Sheehan, N. Rynn
openaire   +1 more source

Source for negative halogen ions

Review of Scientific Instruments, 1977
A simple and inexpensive ion source has been developed for collision dynamic studies. The negative halogen ions are produced by negative surface ionization at a hot surface of LaB6. Because of the selectivity of this ionization process mass selection is not necessary. Emission densities of 10−4 A/cm2 at an energy spread of 0.55 eV are obtained.
N. Kashihira, E. Vietzke, G. Zellermann
openaire   +1 more source

Negative Ion Source Technology

1992
Negative ion sources are based on either of two basic processes: the formation of negative ions by atomic and/or molecular processes in a gas discharge, and induced emission of negative ions from surfaces (sputtering, desorption, double charge exchange of reflected positive ions).
H. J. Hopman, R. M. A. Heeren
openaire   +1 more source

Multiaperture negative ion source

AIP Conference Proceedings, 2013
The long-pulse multiaperture surface-plasma source with negative ion production on a cesiated grid is under construction at Budker Institute. The ion source includes RF plasma driver, an expansion chamber with multicusp magnetic filed, an external magnetic filter and a four-electrode ion-optical system for beam extraction and acceleration.
Yu. I. Belchenko, A. I. Gorbovsky, A. A. Ivanov, S. G. Konstantinov, A. L. Sanin, I. V. Shikhovtsev, M. A. Tiunov   +6 more
openaire   +1 more source

Negative Halogen Ion Sources

IEEE Transactions on Plasma Science, 2008
This paper reviews recent progress in developing high current density ion sources for positive and negative halogen ion beams. These sources have produced CI- current densities almost equal to their positive chlorine current densities, and also close to the current densities of Ar+ beams extracted under similar conditions.
openaire   +1 more source