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Related Concept Videos

Gas Chromatography: Types of Detectors-II01:19

Gas Chromatography: Types of Detectors-II

In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
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...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
High-Performance Liquid Chromatography: Types of Detectors01:15

High-Performance Liquid Chromatography: Types of Detectors

The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte properties and...
Gas Chromatography: Types of Detectors-I01:21

Gas Chromatography: Types of Detectors-I

There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
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.

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Related Experiment Video

Updated: Jun 22, 2026

Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
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Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis

Published on: January 6, 2016

CVD diamond alpha-particle detectors with different electrode geometry.

Linjun Wang, Yanyan Lou, Qingfeng Su

    Optics Express
    |June 6, 2009
    PubMed
    Summary

    This study compared two diamond film alpha-particle detector geometries. Microstructure significantly impacts detector performance, but both designs achieved excellent energy resolution.

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    Area of Science:

    • Materials Science
    • Nuclear Instrumentation
    • Semiconductor Physics

    Background:

    • Chemical Vapor Deposition (CVD) diamond films are promising for radiation detection.
    • Understanding the influence of film microstructure on detector performance is crucial for optimizing designs.
    • Previous research has explored various diamond detector geometries with mixed results.

    Purpose of the Study:

    • To investigate the effect of CVD diamond film microstructure on alpha-particle detector performance.
    • To compare the performance of coplanar and sandwich geometry detectors fabricated from identical diamond films.
    • To correlate microstructural features with detector characteristics such as charge collection efficiency and energy resolution.

    Main Methods:

    • Fabrication of two detector types: coplanar and sandwich geometry, using the same CVD diamond film.
    • Performance evaluation including charge collection efficiency and energy resolution under alpha particle irradiation.
    • Microstructural analysis using Raman scattering to identify differences between detector components.

    Main Results:

    • Average charge collection efficiencies were 42.9% for coplanar and 37.4% for sandwich detectors.
    • Raman scattering revealed distinct microstructural features correlating with differences in collection efficiency and photocurrent.
    • Both detector geometries exhibited similar trends in energy resolution with applied electric field, achieving a good resolution of 1.1%.

    Conclusions:

    • The microstructure of the CVD diamond film, specifically differences between growth and nucleation sides, significantly affects detector performance.
    • Despite microstructural variations, both coplanar and sandwich geometries can yield high-quality energy resolution for alpha particle detection.
    • Further optimization of diamond film growth and detector design can lead to enhanced performance in radiation detection applications.