Collisionless Shocks in Active Galaxies and in a Laboratory Plasma

活动星系和实验室等离子体中的无碰撞激波

基本信息

  • 批准号:
    329113474
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    德国
  • 项目类别:
    Research Fellowships
  • 财政年份:
    2016
  • 资助国家:
    德国
  • 起止时间:
    2015-12-31 至 2018-12-31
  • 项目状态:
    已结题

项目摘要

In many astrophysical systems, a hot plasma forms a collisionless shock at the boundary with its environment, where, instead of collisions, turbulent interactions decelerate the faster plasma. Prominent examples are the bow shock of the Earth and most likely the jets of active galactic nuclei. For both cases, however, rigorous quantitative tests are needed to confirm widely discussed yet purely qualitative theories as to how these shocks may be formed. I will investigate the turbulence that facilitates the narrow transition between both sides of a collisionless shock from two perspectives, both numerically and experimentally.Starting with large numerical particle-in-cell simulations that I will run on computing clusters in Germany and the USA, I will calculate the scattering rates of charged particles in collisionless shocks with as yet unrivalled precision. These rates determine the highest energy that cosmic-ray particles in the jets of active galactic nuclei can achieve. A semianalytic model which has already been developed at the University of Würzburg will use these data to predict the variability of the radiation emitted by active galactic nuclei. Thus, we will be able to infer from measurements how much of the observed radiation is due to the acceleration of hadrons.Meanwhile, experiments with high-energy lasers in Los Angeles will produce the first parallel collisionless shocks in a laboratory plasma. Comparing the collected data with hybrid simulations, I will interpret the observations and contribute to optimising the experiment. We will be in a position to measure directly which instabilities are the most important in forming the shock. This insight will help us understand the role that plasma turbulence plays in the formation of planetary bow shocks.
在许多天体物理系统中,热等离子体在与其环境的边界处形成无碰撞激波,而不是碰撞,湍流相互作用使较快的等离子体减速。突出的例子是地球的弓形激波,很可能是活动星系核的喷流。然而,对于这两种情况,都需要进行严格的定量测试,以证实关于这些冲击可能如何形成的广泛讨论但纯粹是定性的理论。我将从数值和实验两个角度研究有助于无碰撞激波两侧狭窄过渡的湍流。从我将在德国和美国的计算集群上运行的大型数值粒子单元模拟开始,我将以前所未有的精度计算无碰撞激波中带电粒子的散射率。这些速率决定了活动星系核喷流中的宇宙射线粒子所能达到的最高能量。维尔茨堡大学已经开发了一个半解析模型,该模型将使用这些数据来预测活动星系核发射的辐射的可变性。因此,我们将能够从测量中推断出有多少观测到的辐射是由于强子的加速。同时,洛杉矶的高能激光实验将在实验室等离子体中产生第一个平行的无碰撞冲击。将收集到的数据与混合模拟进行比较,我将解释观察结果,并为优化实验做出贡献。我们将能够直接测量哪些不稳定是形成冲击波的最重要因素。这一洞察将有助于我们理解等离子体湍流在行星弓激波形成中所起的作用。

项目成果

期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Towards a parallel collisionless shock in LAPD
洛杉矶警察局的平行无碰撞冲击
  • DOI:
    10.1088/1742-6596/900/1/012020
  • 发表时间:
    2017
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Martin S. Weidl;Peter Heuer;Derek Schae er;Robert Dorst;Dan Winske;Carmen Constantin;Christoph Niemann
  • 通讯作者:
    Christoph Niemann
Observations of a Field-Aligned Ion/Ion-Beam Instability in a Magnetized Laboratory Plasma
  • DOI:
    10.1063/1.5017637
  • 发表时间:
    2017-11
  • 期刊:
  • 影响因子:
    0
  • 作者:
    P. Heuer;M. Weidl;R. Dorst;D. Schaeffer;A. Bondarenko;S. K. Tripathi;B. V. Compernolle;S. Vincena-S.-Vin
  • 通讯作者:
    P. Heuer;M. Weidl;R. Dorst;D. Schaeffer;A. Bondarenko;S. K. Tripathi;B. V. Compernolle;S. Vincena-S.-Vin
On the Background-gyroresonant Character of Bell’s Instability in the Large-current Regime
大电流状态下贝尔不稳定性的背景陀螺谐振特性
  • DOI:
    10.3847/1538-4357/aafad0
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Martin S. Weidl ;Dan Winske;Christoph Niemann
  • 通讯作者:
    Christoph Niemann
Three Regimes and Four Modes for the Resonant Saturation of Parallel Ion-beam Instabilities
平行离子束不稳定性共振饱和的三种状态和四种模式
  • DOI:
    10.3847/1538-4357/ab0462
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Martin S. Weidl;Dan Winske;Christoph Niemann
  • 通讯作者:
    Christoph Niemann
{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Dr. Martin Simon Weidl其他文献

Dr. Martin Simon Weidl的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

相似海外基金

SHINE: Solar Energetic Particles Mediating Interplanetary Shocks Close to the Sun
闪耀:太阳高能粒子介导靠近太阳的行星际激波
  • 批准号:
    2401162
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
Protecting Women from Economic shocks to fight HIV in Africa (POWER)
保护非洲妇女免受经济冲击,抗击艾滋病毒 (POWER)
  • 批准号:
    MR/Y003837/1
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Fellowship
EAGER: IMPRESS-U Adaptive Infrastructure Recovery from Repeated Shocks through Resilience Stress Testing in Ukraine
EAGER:IMPRESS-U 自适应基础设施通过乌克兰的弹性压力测试从反复冲击中恢复
  • 批准号:
    2402580
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Standard Grant
Assessing the role of uncertainty shocks in the macroeconomy: The behavior of model-consistent wage and price markups
评估不确定性冲击在宏观经济中的作用:模型一致的工资和价格加成的行为
  • 批准号:
    24K16357
  • 财政年份:
    2024
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Quasi-Parallel Shocks across the Solar System
整个太阳系的准平行激波
  • 批准号:
    2897122
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Studentship
Study of heating and particle acceleration on collisionless shocks with ground experiment, theory, and high energy resolution X-ray observations
利用地面实验、理论和高能量分辨率 X 射线观测研究无碰撞冲击的加热和粒子加速
  • 批准号:
    23H01211
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Population Health and Period Shocks
人口健康和经期冲击
  • 批准号:
    EP/X027678/1
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Fellowship
Identifying government spending shocks in the U.K: A novel instrumental approach based on natural disasters.
识别英国政府支出冲击:基于自然灾害的新颖工具方法。
  • 批准号:
    2864734
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Studentship
Turbulence, Shocks, and Stability in Fluids and Plasmas
流体和等离子体中的湍流、冲击和稳定性
  • 批准号:
    2307357
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Continuing Grant
'Highlight' Health financing for universal health coverage in the era of shocks, monitoring risks and opportunities in Sub-Saharan Africa
“强调”冲击时代全民健康覆盖的卫生筹资,监测撒哈拉以南非洲的风险和机遇
  • 批准号:
    ES/X012921/1
  • 财政年份:
    2023
  • 资助金额:
    --
  • 项目类别:
    Research Grant
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了