在频率啁啾外场触发的真空击穿过程中对生产的时域优化

IF 2.6 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Physica Scripta Pub Date : 2024-09-12 DOI:10.1088/1402-4896/ad7331

Chi Gong, Xinyu Lu, Dakai Shang, Zhi Ren and Songtao Li

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引用次数: 0

摘要

分析了强外力场引发的狄拉克真空击穿过程中的电子-正电子对产生过程。在总能量相同的情况下，频率啁啾的亚临界力场可以显著提高电子对产生率。这种增强效应是由不同的啁啾频率引起的。随着啁啾参数和随时间变化的力场相位的变化，我们特别关注了最佳力场条件。在不同的啁啾参数下，产生的电子总数的频率加权平均值与理论计算值不同。无论主要机制是什么，当电场对称时，激光的能量利用率最高。

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Time domain optimization of pair production during vacuum breakdown triggered by frequency chirped external fields

The electron–positron pair creation process during the Dirac vacuum breakdown triggered by strong external fields is analyzed. A frequency chirped, subcritical force field can significantly enhance the pair production yield under the identical total energy. This enhancement effect is caused by different chirp frequencies. We pay special attention to optimal field conditions as chirping parameter and phase of the time dependent field are varied. And the total number of created electrons with frequency weighted average under different chirp parameters are different from the theoretically calculated values. And no matter what the main mechanism is, the laser has the highest energy utilization rate when the electric field is symmetrical.

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来源期刊

Physica Scripta 物理-物理：综合

CiteScore

3.70

自引率

3.40%

发文量

782

审稿时长

4.5 months

期刊介绍： Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed: -Atomic, molecular and optical physics- Plasma physics- Condensed matter physics- Mathematical physics- Astrophysics- High energy physics- Nuclear physics- Nonlinear physics. The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.