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Related Concept Videos

Mesh Analysis for AC Circuits01:12

Mesh Analysis for AC Circuits

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In the domain of radio communication, the significance of impedance matching must be considered. It is crucial to ensure the efficient transmission of signals between radio transmitters and receivers. Achieving this balance involves using impedance-matching circuits, with one fundamental configuration comprising a resistor, capacitor, and inductor.
The process of harmonizing these impedances begins with a clear understanding of the input and output signals. Once these signals are known, the...
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Mass Analyzers: Common Types01:19

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview

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In inductively coupled plasma–mass spectrometry (ICP–MS), an inductively coupled plasma (ICP) torch is used as an atomizer and ionizer. Solid samples are dissolved and volatilized before being introduced into the high-temperature argon plasma, while solution samples are nebulized and passed through the high-temperature argon plasma. Plasma dissociates the analytes and ionizes their component atoms to form a mixture of positive ions and molecular species. The positive ions are then...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

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Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
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Mesh Analysis with Current Sources01:10

Mesh Analysis with Current Sources

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Mesh analysis becomes simpler when analyzing circuits with current sources, whether independent or dependent. The presence of current sources reduces the number of equations required for analysis. Two cases illustrate this:
Current Source in One Mesh: The analysis process is straightforward when a current source is found in only one mesh within the circuit. Mesh currents are assigned as usual, with the mesh containing the current source excluded from the analysis. Kirchhoff's voltage law...
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Chemical Ionization (CI) Mass Spectrometry01:21

Chemical Ionization (CI) Mass Spectrometry

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The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
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Related Experiment Video

Updated: May 2, 2026

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
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Extracted ion current density in close-coupling multi-antenna type radio frequency driven ion source: CC-MATIS.

Y Oka1, T Shoji2

  • 1National Institute for Fusion Science, Oroshi, Toki 509-5292, Japan.

The Review of Scientific Instruments
|March 6, 2014
PubMed
Summary
This summary is machine-generated.

This study demonstrates a multi-antenna radio frequency ion source that achieves high extracted ion current density. The developed radio frequency (RF) plasma source shows promising efficiency for large-volume, all-metal ion generation.

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Area of Science:

  • Plasma Physics
  • Ion Source Technology
  • Radio Frequency (RF) Engineering

Background:

  • High-density ion sources are crucial for various applications, including materials processing and space propulsion.
  • Existing radio frequency (RF) driven ion sources face challenges in achieving high current densities and efficiencies in large volumes.
  • The development of efficient and scalable ion source designs is an ongoing area of research.

Purpose of the Study:

  • To investigate the performance of a Close-Coupling Multi-Antenna Type radio frequency (RF) driven ion source.
  • To evaluate the extracted ion current density and RF net power efficiency of this novel ion source design.
  • To assess the potential of multi-antenna RF plasma sources for large-volume, all-metal applications.

Main Methods:

  • Utilized a small extractor for positive ion extraction from the ion source.
  • Employed two distinct types of radio frequency (RF) antennas in the Close-Coupling Multi-Antenna Type configuration.
  • Conducted experiments under standard conditions to measure extracted ion current density and RF net power efficiency.

Main Results:

  • Achieved a maximum extracted ion current density of 0.106 A/cm(2).
  • Obtained an RF net power efficiency of 11.6 mA/cm(2)/kW for the extracted ion current density.
  • The performance metrics were comparable to previous multi-antenna source designs and filament-driven plasmas.

Conclusions:

  • The Close-Coupling Multi-Antenna Type RF driven ion source demonstrates significant potential for generating high-density ion currents.
  • The achieved efficiency indicates the viability of this design for large-volume, all-metal ion source applications.
  • Further development of multi-antenna RF plasma sources could lead to advancements in ion beam technologies.