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Related Experiment Video

Updated: Jul 2, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Preparing an Isotopically Pure ²²⁹Th Ion Beam for Studies of ^229mTh

Published on: May 3, 2019

Characteristics of a multidipole ion source.

K N Leung¹, R D Collier, L B Marshall

¹Department of Physics, James Madison University, Harrisonburg, VA 22801, USA.

The Review of Scientific Instruments

|March 1, 1978

Summary

This study investigates a steady-state, direct current (dc) discharge multidipole ion source. Findings show plasma density is influenced by magnet design, discharge voltage, and grid bias, with methods to minimize ion loss.

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Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments

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Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

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Published on: May 3, 2019

Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments

Using a Cyclic Ion Mobility Spectrometer for Tandem Ion Mobility Experiments

Published on: January 20, 2022

Area of Science:

Plasma Physics
Ion Source Technology
Atomic and Molecular Physics

Background:

Multidipole ion sources are crucial for various applications requiring high-quality ion beams.
Understanding plasma behavior within these sources is essential for optimizing performance.
Previous research has focused on specific aspects, but a comprehensive investigation of parameter dependencies is needed.

Purpose of the Study:

To investigate the operational properties of a steady-state, direct current (dc) discharge multidipole ion source.
To determine the influence of key parameters on plasma density and ion extraction efficiency.
To explore methods for reducing ion loss to the chamber walls.

Main Methods:

Experimental investigation of a steady-state, dc discharge multidipole ion source.
Systematic variation of magnet geometries, discharge voltage, and bias voltage on the extraction grid.
Analysis of plasma density using diagnostic techniques.
Characterization of extracted hydrogen ion species using a mass analyzer.

Main Results:

Plasma density was found to be dependent on magnet geometries, discharge voltage, and bias voltage.
Effective schemes were identified to mitigate ion loss towards the chamber walls.
The composition of hydrogen ion species in the extracted beam was successfully analyzed.

Conclusions:

The performance of the multidipole ion source can be optimized by controlling magnet configuration and electrical parameters.
Strategies for reducing ion loss are critical for enhancing beam current and quality.
Detailed analysis of ion species provides insights for specific application requirements.