A small electron cyclotron resonant plasma-based neutral-flux ionizer

B. L. Cain; D. N. Ruzic

doi:10.1063/1.1141606

A small electron cyclotron resonant plasma-based neutral-flux ionizer

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Abstract

The design and operation of a neutral-hydrogen flux detection system is described. The central feature of the detector is an inductively driven electron cyclotron resonance heated (ECRH) discharge, which functions as the neutral-flux ionizer. The prominent features of the ionizer are its small (5×3×3 cm³) size and excitation of the ECRH mode using a 200-W, 30-MHz rf driver and static magnetic field level near 30 G. The ability of the system to ionize 910-eV neutral-hydrogen fluxes with subsequent detection in a high resolution energy analyzer is shown. The detection efficiency of the ionizer was found to be ≊6×10^-4, based on scattering and charge exchange cross sections measured using a methane charge exchange cell. The ionizer has potential applications in angle-resolved reflected neutral-flux measurements and in beam-plasma interaction analysis.

Original language	English (US)
Pages (from-to)	3473-3478
Number of pages	6
Journal	Review of Scientific Instruments
Volume	61
Issue number	11
DOIs	https://doi.org/10.1063/1.1141606
State	Published - 1990

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Instrumentation

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abstract = "The design and operation of a neutral-hydrogen flux detection system is described. The central feature of the detector is an inductively driven electron cyclotron resonance heated (ECRH) discharge, which functions as the neutral-flux ionizer. The prominent features of the ionizer are its small (5×3×3 cm3) size and excitation of the ECRH mode using a 200-W, 30-MHz rf driver and static magnetic field level near 30 G. The ability of the system to ionize 910-eV neutral-hydrogen fluxes with subsequent detection in a high resolution energy analyzer is shown. The detection efficiency of the ionizer was found to be ≊6×10-4, based on scattering and charge exchange cross sections measured using a methane charge exchange cell. The ionizer has potential applications in angle-resolved reflected neutral-flux measurements and in beam-plasma interaction analysis.",

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year = "1990",

doi = "10.1063/1.1141606",

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AB - The design and operation of a neutral-hydrogen flux detection system is described. The central feature of the detector is an inductively driven electron cyclotron resonance heated (ECRH) discharge, which functions as the neutral-flux ionizer. The prominent features of the ionizer are its small (5×3×3 cm3) size and excitation of the ECRH mode using a 200-W, 30-MHz rf driver and static magnetic field level near 30 G. The ability of the system to ionize 910-eV neutral-hydrogen fluxes with subsequent detection in a high resolution energy analyzer is shown. The detection efficiency of the ionizer was found to be ≊6×10-4, based on scattering and charge exchange cross sections measured using a methane charge exchange cell. The ionizer has potential applications in angle-resolved reflected neutral-flux measurements and in beam-plasma interaction analysis.

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A small electron cyclotron resonant plasma-based neutral-flux ionizer

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