Laser spectroscopic determination of electric fields, electron densities, and electron temperatures in atmospheric pressure microdischarges

激光光谱测定大气压微放电中的电场、电子密度和电子温度

• 批准号: 109382713
• 负责人: Professor Dr. Uwe Czarnetzki
• 金额: --
• 依托单位: Institut für Experimentalphysik V: Lehrstuhl für Plasma- und Atomphysik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/109382713?language=en
• 关键词: Laser; spectroscopic; determination; electric; fields

Laser electric field measurements and Thomson scattering can provide non-intrusive diagnostics of major plasma parameters in microdischarges. In particular plasma densities, the electron velocity distribution function, and the local electric field can be measured with ns-time resolution and spatial resolutions of better than 100 μm. The laser measurements are combined with ultra-fast and spectrally resolved optical diagnostics and electrical measurements. Application will be to ns-pulsed and RF-operated jets. While the latter jets are already operational in the research group, the ns-jets are a novel development. In contrast to the RF-jets which require operation in helium with only small molecular admixtures, the short high voltage pulses in the ns-jets will allow direct operation in molecular gases. In particular, operation in nitrogen will allow direct electric field measurements. The data provided by the diagnostics will serves as benchmarks for simulations and models of these micro plasmas.

激光电场测量和汤姆逊散射可以提供微放电中主要等离子体参数的非侵入性诊断。特别是等离子体密度、电子速度分布函数和局部电场可以以ns-time分辨率和优于100 μm的空间分辨率进行测量。激光测量结合了超快速和光谱分辨的光学诊断和电学测量。应用将应用于ns脉冲和rf操作的射流。虽然后一种喷气机已经在研究小组中投入使用，但新型喷气机是一种新的发展。与rf射流相比，rf射流只需要在氦中使用小分子外加剂，而ns射流中的短高压脉冲将允许在分子气体中直接操作。特别是，在氮气中的操作将允许直接电场测量。诊断提供的数据将作为这些微等离子体模拟和模型的基准。

项目成果

Ignition of a nanosecond-pulsed near atmospheric pressure discharge in a narrow gap

狭窄间隙中纳秒脉冲近大气压放电的点火

• DOI: 10.1088/0022-3727/44/16/165202
• 发表时间: 2011
• 期刊: Journal of Physics D: Applied Physics
• 作者: S. Müller;D. Luggenhölscher;U. Czarnetzki
• 通讯作者: U. Czarnetzki

Kinetic simulation of a nanosecond-pulsed hydrogen microdischarge

• DOI: 10.1063/1.3601486
• 发表时间: 2011-06
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Z. Donkó;J. Schulze;S. Müller;U. Czarnetzki

Electric field vector measurements in a surface ionization wave discharge

• DOI: 10.1088/0963-0252/24/5/055017
• 发表时间: 2015-09
• 期刊: Plasma Sources Science and Technology
• 影响因子: 3.8
• 作者: B. Goldberg;P. Böhm;U. Czarnetzki;I. Adamovich;W. Lempert

Temporally resolved optical emission spectroscopic investigations on a nanosecond self-pulsing micro-thin-cathode discharge

纳秒自脉冲微薄阴极放电的时间分辨光学发射光谱研究

• DOI: 10.1088/0963-0252/21/4/045015
• 发表时间: 2012
• 期刊: Plasma Sources Science and Technology
• 影响因子: 3.8
• 作者: N. Sadeghi;D. Luggenhölscher;U. Czarnetzki
• 通讯作者: U. Czarnetzki

Investigations on the afterglow of a thin cathode discharge in argon at atmospheric pressure

大气压下氩气中薄阴极放电余辉的研究

• DOI: 10.1088/0022-3727/43/29/295201
• 发表时间: 2010
• 期刊: Journal of Physics D: Applied Physics
• 作者: S. Mohr;D. Luggenhölscher;U. Czarnetzki
• 通讯作者: U. Czarnetzki