Ion sources

Ion sources

Devices which produce positive or negative electrically charged atoms or molecules.

In general, ion sources fall into three major categories: those designed for positive-ion generation, those for negative-ion generation, and a highly specialized type of source designed to produce a polarized ion beam. The positive-ion source category may further be subdivided into sources specifically designed to generate singly charged ions and those designed to produce very highly charged ions.

Ion sources have acquired a wide variety of applications. They are used in a variety of different types of accelerators for nuclear research; have application in the field of fusion research; and are used for ion implantation, in isotope separators, in ion microprobes, as a means of rocket propulsion, in mass spectrometers, and for ion milling. See Nuclear fusion, Particle accelerator

McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Traditional ion sources act like hammers, pulverizing samples in ways that can prevent scientists from seeing a true picture of the material.
Nanospray ion sources are widely used for high sensitivity LC-MS applications, supporting researchers needing to analyze limited amounts of biological samples.
The system consists of three Kaufman ion sources, including two sputtering ion sources and one assisting ion source.
Among the topics are theoretical insights into cluster secondary ion mass spectrometry (cluster SIMS), surface analysis of organic materials with polyatomic primary ion sources, three-dimensional imaging with cluster ion beams, and cluster SIMS for the depth profiling of semiconductors and metals.
Typical applications include injectors used in a gas chromatograph, ion sources used in mass spectrometry.
Anode layer type linear ion source (ALIS) is a kind of closed drift type linear ion sources promoted by the plasma acceleration technology of the aerospace thruster [30].
US 8,211,411 B2--an oral care composition that contains a fused silica abrasive and an orally-acceptable carrier selected from fluoride ion sources, antibacterial agents, anticalculus agents, buffers, other abrasive materials, peroxide sources, alkali metal bicarbonate, salts, thickening materials, humectants, water, surfactants, titanium dioxide, flavor system, sweetening agents, cooling agents, xylitol, coloring agents and mixtures thereof.
The facility will have two test stands, one for testing negative ion sources and one for testing a full-size, one-megavolt ITER neutral beam injector.
The company's DART ion sources and application accessories enable the fast, simple analysis of materials in food safety, pharmaceutical development, and forensics.
After discussing the fundamentals, such as ion sources, separation systems and detectors, Becker moves toward explaining modern spectrometric techniques, and how these applications are used in such diverse fields as materials science, biology, bioengineering, medicine, geology, forensic sciences and food analysis.
The company has accomplished this by using state-of the-art ion sources in its ion-assisted vapor deposition process.