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相关概念视频

Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

378
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
378
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

2.1K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
2.1K
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

623
An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
623
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

161
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
161
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

212
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....
212
Atomic Absorption Spectroscopy: Overview01:27

Atomic Absorption Spectroscopy: Overview

2.0K
Atomic absorption spectroscopy (AAS) is a technique used to analyze elements by measuring electromagnetic radiation (EMR) absorbed by atoms, which causes them to transition to a higher-energy orbit. The most crucial step in AAS is atomization, where the analyte is converted into gas-phase atoms, typically through a flame or furnace. Some of these atoms become thermally excited in the flame, while most remain in the ground state.
When irradiated by EMR of a particular wavelength, these...
2.0K

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A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space
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基于Arduino的读取电子设备用于核和粒子物理学.

Markus Köhli1, Jannis Weimar1, Simon Schmidt1

  • 1Physikalisches Institut, Heidelberg University, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany.

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概括

开放式硬件微控制器,如Arduino,为科学仪器提供了具有成本效益的解决方案. 两个新的探测系统,SiPMTrigger和nCatcher,展示了它们在数据采集和信号分析方面的能力.

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在 SiPM 读取输出.开放式硬件 开放式硬件粒子物理学的粒子物理学.一个比例的对手.辐射检测检测辐射检测

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科学领域:

  • * 物理仪器仪表设备
  • *嵌入式系统工程 嵌入式系统工程
  • * 获取科学数据的获取

背景情况:

  • * 开放式硬件微控制器,特别是Arduino,为快速原型设计提供了可访问的平台.
  • *将微控制器与定制电子设备集成,可以为研究和教育提供低成本的仪器仪表.
  • * 现有的解决方案往往缺乏灵活性,用于各种检测器读取和数据记录.

研究的目的:

  • *为科学应用提供基于开放硬件微控制器的新型探测器系统.
  • *为了证明使用Arduino用于信号处理和数据采集在粒子和辐射检测中的可行性.
  • * 引入一个通用的数据记录器,用于扩展远程监控.

主要方法:

  • *开发一个SiPMTrigger板用于光倍增器的巧合读取 (高达200kHz).
  • *使用Arduino Nano实现nCatcher系统,用于带有脉冲形状分析 (高达5kHz) 的比例计数读数.
  • * 设计一个带SD卡和GSM/LoRa的记录器板,用于数据存储和远程通信.

主要成果:

  • * SiPMTrigger成功地对触发或否决应用程序进行了巧合检测.
  • * nCatcher 在比例计量测量,包括热中子监测方面实现了良好的信号噪声比.
  • *日志板在各种环境中促进了高效的数据采集和缓慢控制.

结论:

  • * 开放式硬件微控制器是开发定制科学仪器的强大,低成本工具.
  • * 展示的SiPMTrigger和nCatcher系统为探测器读取和信号分析提供了实际的解决方案.
  • * 集成的数据记录功能提高了这些系统的长期监控和远程实验的实用性.