منابع مشابه
Isomer-resolved ion spectroscopy.
We demonstrate the isomer-resolved spectroscopy of gas-phase ions, with different geometries separated prior to spectroscopic probe using ion mobility techniques. Specifically, ring and chain isomers of carbon cluster anions with 10;-12 atoms have been separated by ion mobility/mass spectrometry and examined by photoelectron spectroscopy. This methodology should also apply to other ion spectros...
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The experimental acidification of Lake 223 (Experimental Lakes Area, northwestern Ontario) with sulfuric acid in 1976-1983 allowed a detailed examination of the capacity of the lake to neutralize hydrogen ion. A whole-lake alkalinity and ion budget for Lake 223 showed that 6681% of the added sulfuric acid was neutralized by alkalinity production in the lake. Nearly 85% of in situ alkalinity pro...
متن کامل“Electrodeless” Plasma Cathode for Neutralization of Ion Thrusters
Significant progress has been made in the characterization of the necessary parameters required to create an effective Radio Frequency (RF) plasma based electron source. Such a device has the promise of comparable current densities to and longer operational lifetimes than hollow cathodes. The operational lifetime of hollow cathodes is ultimately limited by cathode deterioration. RF sources prov...
متن کاملPlasma Neutralization Models for Intense Ion Beam Transport in Plasma
Plasma neutralization of an intense ion pulse is of interest for many applications, including plasma lenses, heavy ion fusion, cosmic ray propagation, etc. An analytical electron fluid model has been developed based on the assumption of long charge bunches (lb>>rb). Theoretical predictions are compared with the results of calculations utilizing a particle-in-cell (PIC) code. The cold electron f...
متن کاملExperimental Studies of Ion Beam Neutralization: Preliminary Results
A testing platform is designed to study ion beam neutralization in the mesothermal, collisionless region. In the experimental setup, argon neutrals were ionized in a microwave cavity and accelerated by a plasma lens system which was biased to 2500 V above the system ground. Electrons were boiled off from two hot tungsten filaments to neutralize the ion beam. The plasma is diagnosed using Langmu...
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ژورنال
عنوان ژورنال: Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
سال: 1970
ISSN: 0022-4332
DOI: 10.6028/jres.074a.033