Simple and inexpensive time-of-flight charge-to-mass analyzer for ion beam source characterization

Gushenets, V. I.; Nikolaev, A. G.; Окс, Е. М.; Vintizenko, L. G.; Yushkov, G. Yu.; Oztarhan, A.; Brown, Ian

doi:10.1063/1.2206778

Cited by 74 publications

(26 citation statements)

References 9 publications

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“…This facility has been described in detail elsewhere [12]- [14]. The broad-beam ion source can be repetitively pulsed at rates up to ∼50 pulses/s, and the extracted ion beam current can be up to ∼1 A peak or ∼10 mA time averaged.…”

Section: Surface Modificationmentioning

confidence: 99%

Oxidation Behavior of C- and Au-Ion-Implanted Biodegradable Polymers

Sokullu

Oztarhan

Tıhmınlıoğlu

et al. 2012

IEEE Trans. Plasma Sci.

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Abstract-Biodegradable polymers are widely used in biomedical and tissue engineering applications due to their biocompatibility and hydrolysis properties in the body. However, their low surface energy and lack of functional groups to interact with the cellular environment have limited their applications for in vivo studies. Ion beam modification is a convenient method for improving the surface properties of polymeric materials for functional biomedical applications. In the work described here, vacuum arc metal ion implantation was used to modify the composition of the near-surface region of three kinds of polymers-poly(L-lactide), poly(D, L-lactide-co-glycolide), and poly(L-lactide/caprolactone)-chosen as representative of biodegradable polymers. X-ray photoelectron spectroscopy analysis was used to characterize the chemical effects of these polymers after implantation with C and with Au, and the results were compared with untreated control samples. We find that oxidation behavior is brought about for certain implantation fluences, resulting in improved surface hydrophilicity.Index Terms-Biodegradable polymers, ion implantation, surface characterization, X-ray photoelectron spectroscopy (XPS).

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Section: Surface Modificationmentioning

confidence: 99%

Oxidation Behavior of C- and Au-Ion-Implanted Biodegradable Polymers

Sokullu

Oztarhan

Tıhmınlıoğlu

et al. 2012

IEEE Trans. Plasma Sci.

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“…The ion source ( Fig.1) consists of a plasma source, and three grid of multiaperture system of the acceleration-deceleration type. Ion beam mass/charge state distributions were measured by a time-of-flight (TOF) spectrometer [7]. The TOF instrument has a drift length of 1.03 m and the detector was a magnetically suppressed Faraday cup.…”

Section: Experimental Set-upmentioning

confidence: 99%

Temporal development of ion beam mean charge state in pulsed vacuum arc ion sources

Окс

Yushkov

Anders

2008

Review of Scientific Instruments

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Vacuum arc ion sources, commonly also known as "Mevva" ion sources, are used to generate intense pulsed metal ion beams. It is known that the mean charge state of the ion beam lies between 1 and 4, depending on cathode material, arc current, arc pulse duration, presence or absence of magnetic field at the cathode, as well background gas pressure. A characteristic of the vacuum arc ion beam is a significant decrease in ion charge state throughout the pulse. This decrease can be observed up to a few milliseconds, until a "noisy" steady-state value is established. Since the extraction voltage is constant, a decrease in the ion charge state has a proportional impact on the average ion beam energy. This paper presents results of detailed investigations of the influence of arc parameters on the temporal development of the ion beam mean charge state for a wide range of cathode materials. It is shown that for fixed pulse duration, the charge state decrease can be reduced by lower arc current, higher pulse repetition rate, and reduction of the distance between cathode and extraction region. The latter effect may be associated with charge exchange processes in the discharge plasma.1

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“…These workpieces were obtained by uniaxial isothermal forging combined with reverse rolling as described in the work of Eroshenko et al [6] and the additional annealing at 500°С. Aluminum ions were implanted in titanium workpieces using the new version of the Mevva (Metal Vapor Vacuum Arc) ion source Mevva-V.RU described in detail in the work of Gushenets et al [7]. Titanium workpieces were exposed to ion implantation at temperature 623 K, accelerating voltage 50 kV, ionic current density 6.5 mA/cm 2 , distance 60 cm from the ion-optical system, implantation time 5.25 h, and fluence 1·10 18 ion/cm 2 .…”

Section: Methodsmentioning

confidence: 99%

Hardening by ion implantation of VT1-0 alloy having different grain size

Nikonenko

Попова

Никоненко

et al. 2016

AIP Conference Proceedings

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Grain size effect on yield strength of titanium alloy implanted with aluminum ions AIP Conference Proceedings 1698, 050002 (2016) Abstract. The paper presents a transmission electron microscopy (TEM) study of the structural and phase state of commercially pure titanium implanted by aluminum ions. TEM study has been carried out for two types of grains, namely coarse (0.4 μm) and small (0.5 μm). This paper presents details of the yield stress calculations and the analysis of strength components for the both grain types in two areas of the modified layer: at a distance of 0-150 nm (surface area I) and ~300 nm (central area II) from the irradiated surface. It is shown that the ion implantation results in a considerable hardening of the entire thickness of the implanted layer in the both grain types. The grain size has, however, a different effect on the yield stress in areas I and II. Thus, near the ion-alloyed layer, the yield stress decreases with the increase of the grain size, whilst area II demonstrates its increase. Moreover, the contribution to the general hardening of the alloy made by certain hardening mechanisms differs from contributions made by each of these mechanisms in each certain case.

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Simple and inexpensive time-of-flight charge-to-mass analyzer for ion beam source characterization

Abstract: New design for a time-of-flight mass spectrometer with a liquid beam laser desorption ion source for the analysis of biomolecules Rev.

Cited by 74 publications

References 9 publications

Oxidation Behavior of C- and Au-Ion-Implanted Biodegradable Polymers

Oxidation Behavior of C- and Au-Ion-Implanted Biodegradable Polymers

Temporal development of ion beam mean charge state in pulsed vacuum arc ion sources

Hardening by ion implantation of VT1-0 alloy having different grain size

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