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Related Concept Videos

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

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.
Aliasing01:18

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original signal...
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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...
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

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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Related Experiment Video

Updated: Jun 12, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
08:31

Three-dimensional Optical-resolution Photoacoustic Microscopy

Published on: May 3, 2011

Fast scanning acoustooptic spectrum analyzer with high dynamic range.

L Jakab, P Richter

    Applied Optics
    |June 18, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A novel acoustooptic spectrum analyzer uses an acoustooptic Bragg cell and a fast detector for improved spatial light analysis. This method achieves high speed and dynamic range, surpassing traditional detector arrays.

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    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
    13:31

    High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis

    Published on: December 22, 2015

    Area of Science:

    • Optics and Photonics
    • Signal Processing

    Background:

    • Traditional spectrum analyzers often rely on detector arrays for spatial light analysis.
    • Limitations in speed and dynamic range can hinder performance in certain applications.

    Purpose of the Study:

    • To introduce a new method for spatial light intensity distribution measurement in the Fourier plane.
    • To develop a faster and more dynamic acoustooptic spectrum analyzer.

    Main Methods:

    • Utilized an acoustooptic Bragg cell instead of a detector array.
    • Integrated a fast, high dynamic range detector.
    • Employed special driving signals for the acoustooptic Bragg cell.

    Main Results:

    • Achieved a time-bandwidth product exceeding 1000.
    • Demonstrated a spectral analysis speed of less than 50 microseconds per spectrum.
    • Increased the dynamic range to over 40 dB.

    Conclusions:

    • The new acoustooptic spectrum analyzer design offers significant improvements in speed and dynamic range.
    • This method provides a viable alternative to traditional detector array-based systems for Fourier plane analysis.