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Related Concept Videos

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,...
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...
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...
IR Spectrometers01:25

IR Spectrometers

There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
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...
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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Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
06:46

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic

Published on: August 25, 2016

Temperature gradient analyzers for compact high-resolution X-ray spectrometers.

D Ishikawa1, A Q R Baron

  • 1Materials Dynamics Laboratory, RIKEN/SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan. disikawa@spring8.or.jp

Journal of Synchrotron Radiation
|December 24, 2009
PubMed
Summary
This summary is machine-generated.

A novel X-ray spectrometer design uses a temperature gradient to achieve high resolution and more sample space. This innovation enhances energy resolution and momentum transfer determination for advanced X-ray scattering experiments.

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Area of Science:

  • Physics
  • Spectroscopy
  • Materials Science

Background:

  • Traditional X-ray spectrometers are limited by the Rowland-circle condition, restricting space for sample manipulation and affecting resolution.
  • Achieving high energy and momentum resolution often requires large, complex instrumentation.

Purpose of the Study:

  • To explore the use of a one-dimensional temperature gradient on analyzer crystals in compact X-ray spectrometers.
  • To investigate methods for relaxing the Rowland-circle condition to improve spectrometer design and performance.

Main Methods:

  • Theoretical analysis using simple analytic formulae.
  • Ray-tracing simulations to validate analytical models.
  • Consideration of position-sensitive detectors and their role in momentum transfer determination.

Main Results:

  • A temperature gradient allows relaxation of the Rowland-circle condition, enabling increased sample space or arm radius for a given energy resolution.
  • Achievable energy resolution of approximately meV is predicted with a 3m analyzer arm and 200mm sample-detector clearance.
  • Detector position sensitivity can be utilized to determine momentum transfer, improving momentum resolution without compromising analyzer size.

Conclusions:

  • The proposed method offers a pathway to compact, high-resolution X-ray spectrometers with enhanced capabilities.
  • This approach is particularly beneficial for inelastic X-ray scattering (IXS) spectrometers requiring large angular acceptance and increased sample space.
  • Temperature gradients can improve energy resolution even with simpler, single-element detectors.