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Related Concept Videos

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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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

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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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Mass Analyzers: Overview01:13

Mass Analyzers: Overview

2.0K
The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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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).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used....
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Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

2.3K
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...
2.3K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

2.1K
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
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Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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Modified quadrupole mass analyzer RGA-100 for beam plasma research in forevacuum pressure range.

D B Zolotukhin1, A V Tyunkov1, Yu G Yushkov1

  • 1Tomsk State University of Control Systems and Radioelectronics, 40 Lenin Ave., Tomsk 634050, Russia.

The Review of Scientific Instruments
|January 3, 2016
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Summary

A modified residual gas analyzer (RGA) enhances electron beam plasma research at forevacuum pressures. Optimization of its new ionizer unit improved ion current measurements for various gases.

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Area of Science:

  • Plasma Physics
  • Analytical Chemistry
  • Vacuum Technology

Background:

  • Industrial quadrupole residual gas analyzers (RGA) are crucial for vacuum system monitoring.
  • Research into electron beam-generated plasma requires specialized diagnostic tools for forevacuum pressures.
  • Standard RGAs may need modification to effectively analyze complex plasma environments.

Purpose of the Study:

  • To adapt the RGA-100 for analyzing electron beam-generated plasma.
  • To enhance ion current measurement sensitivity for various gas species.
  • To optimize operational parameters for forevacuum plasma diagnostics.

Main Methods:

  • Modification of the RGA-100 by replacing the standard ionizer with a three-electrode extracting unit.
  • Optimization of operational parameters to maximize measured ion currents.
  • Testing the modified analyzer with electron beam plasma of argon, nitrogen, oxygen, and hydrocarbons.

Main Results:

  • Successful implementation of a modified RGA-100 for electron beam plasma research.
  • Demonstrated ability to measure ion species in argon, nitrogen, oxygen, and hydrocarbon plasmas.
  • Achieved optimized parameters for enhanced ion current detection.

Conclusions:

  • The modified RGA-100 is a viable tool for characterizing electron beam-generated plasmas.
  • The new extracting unit design improves diagnostic capabilities in forevacuum conditions.
  • This modification expands the application of RGAs in plasma research.