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Showing 1 to 20 of 37 for “"Ion sources"”.
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Engineering ionic liquid ion sources for ion beam applications
Ionic liquid ion sources (ILIS) are devices capable of producing positive and negative molecular ion beams through field evaporation from room-temperature molten salts. If sufficiently high hydraulic impedance from the liquid-supporting emitter is provided such that the ratio of flow rate Q to …
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Performance impact of ion sources in Inertial Electrostatic Confinement devices
… Electrostatic Confinement (IEC) based fusion devices, so as to improve their effectiveness as low cost, portable neutron sources, a novel use of ion sources is proposed as a means of increasing fusion reaction rate at similar power levels. This paper aims to determine the success and …
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Characterization of ion Cluster fragmentation in ionic liquid ion sources
Ion electrospray propulsion is a cutting-edge micropropulsion technology that could revolutionize the capabilities of microsatellites. Ion electrospray thrusters could also be used on large spacecraft for precision attitude control applications such as gravity wave detection and exoplanet imaging. …
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On the stability of complex ions in ionic liquid Ion sources
Ionic liquids are molten salts at room temperature that consist of positive and negative ions. These liquids can be used in electrosprays to produce ion beams. Ionic liquid ion source (ILIS) beams typically consist of single ions and solvated ions. It has been observed that solvated ions are not …
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The use of ionic liquid ion sources (ILIS) in FIB applications
A new monoenergetic, high-brightness ion source can be constructed using an arrangement similar to liquid metal ion sources (LMIS) by substituting the liquid metal with an ionic liquid, or room temperature molten salt. Ion beams produced by these ionic liquid ion sources (ILIS) have energy deficits …
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Optimization of surface dielectric barrier discharge ion sources for electroaerodynamic propulsion
… discharge (DBD) that can be used to generate ions and produce aerodynamic forces in air. They have been studied for aerodynamic flow control and proposed for small aircraft propulsion as both direct sources of thrust and as ion sources for "decoupled" electroaerodynamic (EAD) propulsion, in …
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Characterization of ionic liquid ion sources for focused ion beam applications
In the Focused Ion Beam (FIB) technique, a beam of ions is reduced to nanometer dimensions using dedicated optics and directed to a substrate for patterning. This technique is widely used in micro- and nanofabrication for etching, material deposition, microscopy, and chemical surface analysis. …
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Additively Manufacturing High-Performance, Low-Cost Electrospray Ion Sources for Point-of-Care Mass Spectrometry
Clinical mass spectrometry relies on ionization of liquid biological samples, often via electrospray. This work broadly leverages additive manufacturing for the development of electrospray emitters, doubling signal-to-clutter ratios relative to state-of-the-art. We demonstrate low-cost integration …
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Investigation on the Microwave-based techniques to improve the performances of the Electron Cyclotron Resonance Ion Sources
Le sorgenti di ioni di tipo ECR (Electron Cyclotron Resonance) si sono rivelate molto importanti per la produzione continua ed affidabile di fasci intensi di ioni ad alto stato di carica destinati alle facilities di acceleratori di particelle. Recentemente, nuove tecniche sono state sviluppate per …
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Laser Heating of Solid Hydrogen for Production of Vibrationally Excited Molecules for Use in Negative Hydrogen Ion Sources
… of heating the hydrogen is to create a vibrationally excited population of hydrogen for use in negative hydrogen ion sources. The desired heating temperature is 3000-6000 K.
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On the identification and mitigation of life-limiting mechanisms of ionic liquid ion sources envisaged for propulsion of microspacecraft
Life-limiting processes affecting ionic liquid ion sources (ILIS) are investigated in this research, motivated by the development of ILIS for propulsion of microspacecraft and other industrial applications. Micropropulsion in particular has received considerable interest in recent years due to the …
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Investigation of laser-driven particle acceleration for the development of tunable ion sources for applications in high energy density science
Since the innovation of chirped pulse amplification by Donna Strickland and Gerard Morou in 1985, laser technology has evolved such that we can create short pulses of light (10⁻¹⁵ − 10⁻¹² seconds) with high peak powers (1015 Watts) in small, focused spots (∼a few microns). A prolific area of …
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Development of a duoplasmatron ion source at the Ithemba laboratory for accelerator based science (ithemba labs)
A cold hollow cathode duoplasmatron ion source has been designed, built, optimized and evaluated for use as an external stand-by ion source for the second injector cyclotron (SPC2) during those times that the light-ion injector cyclotron (SPCl) is out of operation and not available for …
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The scattering of fast neutrons by lead. Construction of an ion source and accelerating tube
Many new ideas have been tried in the search of ion sources with greater output. One of the best announced in recent years is an ion source designed by A. T. Finkelstein and described in the "Review of Scientific Instruments". One of the purposes of the work discussed in this paper was the adaption …
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Numerical Characterization of Fragmentation in Ionic Liquid Clusters
Ionic liquid ion sources are a promising technology that can be used for many applications from space propulsion to focused ion beam microetching. The variety of ionic liquids that can be synthesized enables the selection of desired beam properties for optimizing propulsion and focused ion beam …
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A comprehensive numerical procedure for solving the Taylor-Melcher leaky dielectric model with charge evaporation
Electrosprays in the pure-ion mode are of particular interest to space propulsion because of its ability to produce high specific impulse and efficient electrical-to-kinetic energy transformation, together with its simplicity and compactness. Unlike electrospray emitters operating in the droplet …
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Beam-Ion Transport in Tokamaks: Thermalization in Large Orbit-Width Regime
… shows that the small orbit-width approximation introduces $\ge$5% errors in the density, parallel momentum, and energy moments when $\rho\sb{\theta}/L = 0.86$ in low-$Z\sb{\rm eff}$ plasmas. These results are observed for all source pitch-angles studied except the deeply passing sources, …
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Paper spray mass spectrometry (PS-MS) for toxicological drug screens and biomonitoring of chemical warfare agent exposure
Paper spray is an ambient ionization technique for mass spectrometry that is well-known for its ability to accomplish rapid and sensitive analyses without any need for sample preparation. This work further develops the technique in two major areas: negative ionization and drug screening. Negative …
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Considerations for a multi-modal electrospray propulsion system
… as popular, economic alter natives to traditional satellites which might also facilitate low-cost space access for academia and developing nations. One of the foremost remaining obstacles to the widespread deployment of these spacecraft is the lack of suitable propulsion, which has severely …
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Development and applications of electrically driven separation methods.
… (CEC) is one of the newest separation techniques. It is a hybrid technique of high performance liquid chromatography (HPLC) and capillary zone electrophoresis (CZE). It combines the simplest capillary electrophoresis mode where separations are based on the differences in the …
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