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相关概念视频

Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

598
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...
598
Mass Analyzers: Overview01:13

Mass Analyzers: Overview

655
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...
655

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相关实验视频

Updated: Jun 26, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

Published on: August 17, 2017

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一个线性离子陷的建模,驱动矩形波形.

A I Ivanov1, A A Sysoev2, A N Konenkov1

  • 1Ryazan State University named after S.A. Esenin, Ryazan, Russia.

Journal of mass spectrometry : JMS
|May 10, 2024
PubMed
概括
此摘要是机器生成的。

这项研究详细介绍了一种数字线性离子陷 (LIT),用于离子质量扫描使用共振辐射射. 该方法通过变压脉冲不对称性实现了大约10kDa的最大质量电荷比.

关键词:
数字线性离子陷是数字线性离子陷.离子振荡频率的频率质量范围范围的质量范围.长方形的波形是矩形的波形.陷的接受性 陷的接受性陷的操作参数 陷的操作参数

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Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

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科学领域:

  • 物理 物理学 物理
  • 分析化学 分析化学
  • 质谱测量质量谱测量

背景情况:

  • 数字线性离子陷 (LIT) 对质谱学至关重要.
  • 响应辐射射出是一种用于离子陷操纵的技术.
  • 在LIT中优化离子扫描和接受对于提高性能至关重要.

研究的目的:

  • 为了研究数字线性离子陷与共振辐射弹射的操作.
  • 开发和分析使用电压脉冲不对称的离子质量扫描方法.
  • 计算离子振荡频率和陷接受率,以优化质量扫描.

主要方法:

  • 应用一系列矩形电压脉冲与双极共振信号来捕捉电极.
  • 使用一块式常数,由一个不对称参数决定的零平均周期波形.
  • 通过时间变化不对称参数和负脉冲振幅来执行离子质量扫描.

主要成果:

  • 计算的离子振荡频率和线性陷的接受度.
  • 确定了离子质量电荷比对不对称参数的依赖.
  • 达到大约10kDa的最大质量电荷比,具有特定的陷参数和二极激发频率 (0.125MHz).

结论:

  • 描述的方法使得有效的离子质量扫描在数字线性离子陷.
  • 优化电压脉冲参数,特别是不对称性,最大限度地提高了陷的接受和质量扫描范围.
  • 这种技术为提高离子陷质谱的性能提供了一条途径.