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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

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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.
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Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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In 1931, physicist Ernst Ruska—building on the idea that magnetic fields can direct an electron beam just as lenses can direct a beam of light in an optical microscope—developed the first prototype of the electron microscope. This development led to the development of the field of electron microscopy. In the transmission electron microscope (TEM), electrons are produced by a hot tungsten element and accelerated by a potential difference in an electron gun, which gives them up to 400...
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Forevacuum-pressure plasma-cathode high-power continuous electron beam source.

A A Zenin1, I Yu Bakeev1, A S Klimov1

  • 1Physics Department, Tomsk State University of Control Systems and Radioelectronics, Tomsk 634050, Russia.

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A new plasma-cathode electron beam source using hollow-cathode discharge generates a 9 kW dc beam. This durable electron source shows potential for extended operational use with minimal degradation.

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Area of Science:

  • Physics
  • Engineering
  • Materials Science

Background:

  • Electron beam sources are crucial for various scientific and industrial applications.
  • Developing stable and high-power electron sources remains an active area of research.

Purpose of the Study:

  • To introduce a novel plasma-cathode electron beam source.
  • To characterize the performance and durability of the developed electron source.

Main Methods:

  • Utilized a hollow-cathode discharge configuration.
  • Employed helium as the working gas at a pressure of 30 Pa.
  • Operated the source at an accelerating voltage of 20 kV to generate a 9 kW dc electron beam.

Main Results:

  • Successfully generated a 9 kW direct current (dc) electron beam.
  • Achieved stable operation at 20 kV accelerating voltage.
  • Demonstrated minimal degradation of the extraction system over approximately 50 operational hours.

Conclusions:

  • The plasma-cathode electron beam source is a promising technology for high-power applications.
  • The source exhibits a projected operational lifetime of 100-120 hours.
  • The design shows good durability and potential for reliable long-term performance.