Characterization of the Ion Beam Current Density of the RF Ion Source with Flat and Convex Extraction Systems

Silicon ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 2743-2749 ◽  
Author(s):  
Maryam Salehi ◽  
Ali Asghar Zavarian ◽  
Ali Arman ◽  
Fatemeh Hafezi ◽  
Ghasem Amraee Rad ◽  
...  
Keyword(s):  
Current Density ◽  
Ion Beam ◽  
Beam Current ◽  
Ion Source ◽  
Beam Current Density ◽  
Rf Ion Source

Effects of Beam Current Density on Ion Beam Synthesis OF SiC

2001 ◽  
Vol 680 ◽  
Author(s):  
D.H. Chen ◽  
S.P. Wong ◽  
J.K.N. Lindner
Keyword(s):  
Current Density ◽  
Photoelectron Spectroscopy ◽  
Ion Beam ◽  
Metal Vapor ◽  
Beam Current ◽  
Ion Source ◽  
Vacuum Arc ◽  
Beam Current Density ◽  
Carbon Clusters ◽  
High Dose

ABSTRACTThin SiC layers were synthesized by high dose C implantation into silicon using a metal vapor vacuum arc ion source at various conditions. Characterization of the ion beam synthesized SiC layers was performed using various techniques including x-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) absorption, and Raman spectroscopy. The XPS results showed that for samples with over-stoichiometric implant doses, if the implant beam current density was not high enough, even after prolonged thermal annealing at high temperatures, the as-implanted gaussian-like carbon depth profile remained unchanged. However, if the implant beam current density was sufficiently high, there was significant carbon redistribution during annealing, so that a thicker stoichiometric SiC layer can be formed after annealing. The XPS and Raman results also showed that there were carbon clusters formed in the as-implanted layers for the low beam current density implanted samples, while the formation of such carbon clusters was minimal in the high beam current density as-implanted samples. The effect of beam current density on the fraction of different bonding states of the implanted carbon atoms was studied.

scholarly journals Space-charge compensation of highly charged ion beam from laser ion source

1996 ◽  
Vol 14 (3) ◽  
pp. 323-333 ◽  
Author(s):  
S.A. Kondrashev ◽  
J. Collier† ◽  
T. R. Sherwood†
Keyword(s):  
Space Charge ◽  
Current Density ◽  
Ion Beam ◽  
Charge Compensation ◽  
Beam Current ◽  
Ion Source ◽  
Beam Current Density ◽  
Laser Ion Source ◽  
Beam Transport ◽  
Highly Charged Ion

The problem of matching an ion beam delivered by a high-intensity ion source with an accelerator is considered. The experimental results of highly charged ion beam transport with space-charge compensation by electrons are presented. A tungsten thermionic cathode is used as a source of electrons for beam compensation. An increase of ion beam current density by a factor of 25 is obtained as a result of space-charge compensation at a distance of 3 m from the extraction system. The process of ion beam space-charge compensation, requirements for a source of electrons, and the influence of recombination losses in a spacecharge-compensated ion beam are discussed.

Effects of a dielectric material in an ion source on the ion beam current density and ion beam energy

2016 ◽  
Vol 87 (2) ◽  
pp. 02B930
Author(s):  
Y. Fujiwara ◽  
H. Sakakita ◽  
A. Nakamiya ◽  
Y. Hirano ◽  
S. Kiyama
Keyword(s):  
Current Density ◽  
Beam Energy ◽  
Dielectric Material ◽  
Ion Beam ◽  
Beam Current ◽  
Ion Source ◽  
Beam Current Density

Alloy surface composition resulting from fabrication, as determined by s.i.m.s. (secondary ion mass spectrometry)

1980 ◽  
Vol 295 (1413) ◽  
pp. 134-135
Keyword(s):  
Secondary Ion Mass Spectrometry ◽  
Surface Composition ◽  
Ion Beam ◽  
Sample Surface ◽  
Beam Current ◽  
Ion Source ◽  
Beam Current Density ◽  
Dynamic Mode ◽  
Static Mode ◽  
Subsequent Performance

In s.i.m.s. the sample surface is ion bombarded and the emitted secondary ions are mass analysed. When used in the static mode with very low primary ion beam current densities (10 -11 A/mm 2 ), the technique analyses the outermost atomic layers with the following advantages (Benninghoven 1973, I975): the structural—chemical nature of the surface may be deduced from the masses of the ejected ionized clusters of atoms; detection of hydrogen and its compounds is possible; sensitivity is extremely high (10 -6 monolayer) for a number of elements. Composition profiles are obtained by increasing the primary beam current density (dynamic mode) or by combining the technique in the static mode with ion beam machining with a separate, more powerful ion source. The application of static s.i.m.s. in metallurgy has been explored by analysing a variety of alloy surfaces after fabrication procedures in relation to surface quality and subsequent performance. In a copper—silver eutectic alloy braze it was found that the composition of the solid surface depended markedly on its pretreatment. Generally there was a surface enrichment of copper relative to silver in melting processes while sawing and polishing enriched the surface in silver

Measurements of beam current density and space potential in a highly focused ion beam of extremely low energy

2019 ◽  
Vol 28 (6) ◽  
pp. 065010
Author(s):  
Yoichi Hirano ◽  
Yutaka Fujiwara ◽  
Satoru Kiyama ◽  
Yamato Adachi ◽  
Hajime Sakakita
Keyword(s):  
Current Density ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Beam Current ◽  
Low Energy ◽  
Beam Current Density ◽  
Space Potential

Simulations and experiments of intense ion beam current density compression in space and time

2009 ◽  
Vol 16 (5) ◽  
pp. 056701 ◽  
Author(s):  
A. B. Sefkow ◽  
R. C. Davidson ◽  
E. P. Gilson ◽  
I. D. Kaganovich ◽  
A. Anders ◽  
...  
Keyword(s):  
Current Density ◽  
Ion Beam ◽  
Beam Current ◽  
Beam Current Density ◽  
Space And Time

Magnetoresistance Effects in Granular Thin Layers Formed by High Dose Iron Implantation Into Silicon

1997 ◽  
Vol 475 ◽  
Author(s):  
S.P. Wong ◽  
W.Y. Cheung
Keyword(s):  
Magnetic Field ◽  
Current Density ◽  
Beam Current ◽  
Implantation Dose ◽  
Ion Source ◽  
Thin Layers ◽  
Beam Current Density ◽  
High Dose ◽  
Zero Field ◽  
Mr Effect

ABSTRACTHigh dose iron implantation into silicon substrates has been performed with a metal vapor vacuum arc ion source to doses ranging from 5×1016 to 2×1017 cm'2 at various beam current densities. The magnetoresistance (MR) effects in these implanted granular layers were studied at temperatures from 15K to 300K. A positive MR effect, i.e., an increase in the resistance at the presence of a magnetic field, was observed at temperatures lower than about 40K in samples prepared under appropriate implantation conditions. The magnitude of the MR effect, defined as ΔR/Ro ≡ (R(H)-Ro)/Ro where R(H) and Ro denote respectively the resistance value at a magnetic field intensity H and that at zero field, was found to depend not only on the implantation dose but also on the beam current density. This is attributed to the beam heating effect during implantation which affects the formation of the microstructures. The ratio δR/Ro was found to attain high values larger than 400% for some samples at low temperatures. The dependence of the MR effects on temperature, implantation dose, and beam current density will be presented and discussed in conjunction with results of transmission electron microscopy.

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