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関連する概念動画

Energy Associated With a Charge Distribution01:21

Energy Associated With a Charge Distribution

2.0K
The work done to bring a charge through a distance r is given by the potential difference between the initial and the final position. To assemble a collection of point charges, the total work done can be expressed in terms of the product of each pair of charges divided by their separation distance, defined with respect to a suitable origin. Solving this expression gives the energy stored in a point charge distribution.
2.0K
Atomic Emission Spectroscopy: Lab01:29

Atomic Emission Spectroscopy: Lab

678
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...
678
Atomic Emission Spectroscopy: Overview01:20

Atomic Emission Spectroscopy: Overview

3.9K
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...
3.9K
Calculation of Electric Flux01:25

Calculation of Electric Flux

3.0K
Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
3.0K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

1.4K
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.
1.4K
Electric Potential Energy in a Uniform Electric Field01:09

Electric Potential Energy in a Uniform Electric Field

6.6K
When an electric field accelerates a free positive charge, it acquires kinetic energy. This process is analogous to an object being accelerated by a gravitational field as if the charge were going down an electrical hill where its electric potential energy is converted into kinetic energy, although, of course, the sources of the forces are very different. The electrostatic or Coulomb force acting on the positive test charge is conservative, which means that the work done on a test charge is...
6.6K

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関連する実験動画

Updated: Feb 20, 2026

Preparing a Celadonite Electron Source and Estimating Its Brightness
09:14

Preparing a Celadonite Electron Source and Estimating Its Brightness

Published on: November 5, 2019

4.9K

フィールド・エミッション・ソースの初期エネルギー分布を計算する.

John Rouse1, Catherine Rouse1, Haoning Liu1

  • 1Munro's Electron Beam Software Ltd, 14 Cornwall Garden, London, SW7 4AN, UK.

Microscopy (Oxford, England)
|February 19, 2026
PubMed
まとめ
この要約は機械生成です。

研究者は,フィールド放射源における電子エネルギー分布の分析式を導き出した. これにより,効率的なモンテカルロシミュレーションを行い,電子放出現象の理解を深めることができます.

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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization

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X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
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X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells

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関連する実験動画

Last Updated: Feb 20, 2026

Preparing a Celadonite Electron Source and Estimating Its Brightness
09:14

Preparing a Celadonite Electron Source and Estimating Its Brightness

Published on: November 5, 2019

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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
06:58

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization

Published on: July 12, 2016

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X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
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科学分野:

  • 物理 物理学 物理学とは
  • 計算物理学の物理
  • マテリアルサイエンス 材料科学

背景:

  • モンテカルロシミュレーションでは,電子の速度に対して正確な初期条件が必要です.
  • フィールドの排出源に対してこのような条件を生成することは,分析的に困難です.
  • 熱電源に関する既存の方法は,フィールド放射に直接適用できない.

研究 の 目的:

  • 電子エネルギー確率分布を統合するための分析式を導き出す.
  • モンテカルロシミュレーションの初期速度の効率的な数値生成を可能にします.
  • フィールド排出源のシミュレーションの精度と効率を向上させるため.

主な方法:

  • 確率密度積分の分析式を導出する.
  • 計算のためにガウスの超幾何学関数を使用する.
  • 計算技術を用いた導出式の数値評価.

主要な成果:

  • エネルギー分布積分の分析式を成功裏に導いた.
  • 公式にはガウスの超幾何学関数が含まれています.
  • モンテカルロシミュレーションのためのコンピュータプログラムに実装された公式.

結論:

  • 導出式は,電子の速度を生成するための効率的な方法を提供します.
  • これにより,冷気および熱場の排出源の正確なモンテカルロ分析が容易になります.
  • このアプローチは,電子放出現象のシミュレーションを強化します.