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相关概念视频

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

296
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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大气LiDAR回声信号的光子计数方法基于波形分解的波形分解信号.

He Chen, Jia Gong, Siying Chen

    Applied optics
    |August 12, 2025
    PubMed
    概括

    这项研究引入了一种新的波形分解方法,以准确计算大气LiDAR系统中的光子,克服光子脉冲堆叠导致的信号扭曲. 该技术显著提高了光子计数率,扩大了测量能力.

    科学领域:

    • 大气科学 大气科学
    • 光学工程的光学工程.
    • 信号处理 信号处理

    背景情况:

    • 大气LiDAR系统面临着光子计数率和扭曲,这是由于光子脉冲堆叠在光倍子管 (PMT) 输出中.
    • 这种扭曲限制了传统光子计数方法的精度和有效测量范围.

    研究的目的:

    • 开发LiDAR回声信号的先进光子计数方法,克服光子脉冲堆叠引起的和扭曲.
    • 为了提高大气LiDAR系统的精度和扩大测量范围.

    主要方法:

    • 提出了一种新的波形分解技术,利用PMT的单光子脉冲响应作为基础函数.
    • 莱文伯格-马奎特优化算法用于将单个光子组件从复杂的波形信号中分离出来.
    • 二级算法识别并插入"缺失"光子被堆叠遮蔽,解决初始参数确定问题.

    主要成果:

    • 拟议的方法成功地分离了模糊的光子组件,即使在堆叠的脉冲中也能够进行准确的计数.
    • 对于1GHz采样回声信号,相对于传统的峰值检测,光子计数率的上限从200MHz增加到500MHz.
    • 这代表了LiDAR中光子计数的有效测量范围的显著扩大.

    结论:

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  • 波形分解方法有效地解决了大气LiDAR中的光子计数率和扭曲.
  • 这一进步提高了LiDAR系统的可靠性,并扩大了用于大气测量的运行范围.