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Related Concept Videos

Inductively Coupled Plasma–Mass Spectrometry (ICP–MS): Overview01:19

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

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 passed on to...
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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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A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
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Published on: December 22, 2018

Plasma-based accelerator with magnetic compression.

P F Schmit1, N J Fisch

  • 1Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey 08544, USA.

Physical Review Letters
|February 2, 2013
PubMed
Summary
This summary is machine-generated.

A novel magnetic compression technique enhances plasma accelerators by controlling plasma waves. This method overcomes electron dephasing, a key limitation in plasma-based acceleration, improving efficiency.

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Area of Science:

  • Plasma Physics
  • Accelerator Physics
  • Applied Electromagnetics

Background:

  • Electron dephasing is a significant factor limiting gain in plasma-based accelerators.
  • Existing acceleration techniques like plasma beat wave, plasma wakefield, and laser wakefield acceleration face challenges due to dephasing.

Purpose of the Study:

  • To introduce a novel method for overcoming electron dephasing in plasma-based accelerators.
  • To demonstrate how magnetic compression can enable direct, time-resolved control of plasma wave properties.

Main Methods:

  • Modulation of a modest axial, uniform magnetic field (~10 kG) within the acceleration channel.
  • Utilizing magnetic compression to achieve plasma densification.
  • Comparing the advantages of magnetic compression with other dephasing mitigation techniques.

Main Results:

  • Magnetic compression effectively densifies the plasma.
  • This densification allows for precise control over plasma wave characteristics.
  • The proposed method is broadly applicable to various plasma acceleration schemes.

Conclusions:

  • The novel magnetic compression technique offers a viable solution to the electron dephasing problem.
  • This approach can enhance the performance of leading plasma acceleration methods.
  • The direct, time-resolved control of plasma waves represents a significant advancement.