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Related Experiment Video

Updated: Jul 2, 2026

High Resolution Physical Characterization of Single Metallic Nanoparticles

High Resolution Physical Characterization of Single Metallic Nanoparticles

Published on: June 28, 2019

Multichannel neutral-particle analyzer system.

W E Nexsen¹, W C Turner, W F Cummins

¹Lawrence Livermore Laboratory, University of California, Livermore, California 94550.

The Review of Scientific Instruments

|October 1, 1979

Summary

This summary is machine-generated.

A new multichannel neutral analyzer measures charge-exchange flux in magnetically confined plasma. This system provides detailed energy spectra for specific ion species, enabling advanced plasma diagnostics.

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High Resolution Physical Characterization of Single Metallic Nanoparticles

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Area of Science:

Plasma Physics
Fusion Energy Research
Particle Diagnostics

Background:

Analysis of magnetically confined plasma is crucial for fusion energy development.
Understanding charge-exchange flux provides insights into plasma properties and confinement.
Existing diagnostic tools have limitations in energy and spatial resolution.

Purpose of the Study:

To describe a novel multichannel neutral analyzer system.
To enable detailed analysis of charge-exchange flux from magnetically confined plasmas.
To improve spatial and energy resolution for plasma diagnostics.

Main Methods:

Utilizes tandem magnetic-electrostatic deflection for ion energy analysis.
Employs a gas cell for neutral stripping and ion production.
Features a collimated analyzer with 2 cm FWHM spatial resolution, allowing radial scans.
Digital data recording captures fluctuations up to 50 kHz.

Main Results:

The system successfully obtains energy spectra for specific charge-to-mass ratio species.
Radial scans of charge-exchange flux are feasible due to the movable analyzer.
High-frequency fluctuations in charge-exchange flux can be analyzed.
Calibration was performed using an atomic-beam setup and an auxiliary single-channel analyzer.

Conclusions:

The developed multichannel neutral analyzer is an effective tool for plasma diagnostics.
The system enhances the capability to study charge-exchange flux in fusion devices.
Provides valuable data for understanding plasma behavior and improving confinement.