Time-resolved measurements of multiply charged ions in an EBIT including excitation by LCLS x-rays pulses

EBIT 中多电荷离子的时间分辨测量，包括 LCLS X 射线脉冲的激发

• 批准号: 221326082
• 负责人: Professor Dr. Elmar Träbert
• 金额: --
• 依托单位: Lehrstuhl für Astronomie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/221326082?language=en
• 关键词: Time; resolved; measurements; multiply; charged

Time resolution offers new insights into various problems in the physics of highly charged ions. One aspect is the study of wave function composition and its susceptibility to external magnetic fields, with test cases in the spectrum Fe XVII. The magnetic-field dependent occurrence of a J=0-0 transition (usually strictly forbidden) is to be measured in an electron beam ion trap (EBIT) via atomic lifetimes in the microsecond range. A prominent pair of 3d levels in the same atomic system (the 3C/3D problem) in contrast requires excitation by adjustable pairs of intense x-ray pulses with an arrival time difference on the scale of dozens of femtoseconds. This experiment can presently be tried only at the Linac Coherent Light Source (LCLS) at SLAC (Stanford, CA, USA) with a traveling EBIT jointly run by a MPI–K Heidelberg and Lawrence Livermore National Laboratory (LLNL) team. A subsequent measurement, in step with LCLS performance improvements, will measure the decay rate of the resonance line in two-electron (heliumlike) ions.

时间分辨率在高度电荷离子的物理学中提供了新的问题。在微秒范围内通过原子寿命在电子束陷阱（EBIT）中进行测量。目前可以在SLAC（美国加利福尼亚州斯坦福大学）的Linac Cooherent Light Source（LCLS）（美国加利福尼亚州斯坦福大学的Linac Coomerent Light Source（LCLS）中尝试使用数十个实验。改进将测量两电子（氦）离子中共振线的CAY速率。

项目成果

HIGH-RESOLUTION LABORATORY MEASUREMENTS OF CORONAL LINES IN THE 198–218 Å REGION

• DOI: 10.1088/0004-637x/788/1/25
• 发表时间: 2014-05
• 期刊: The Astrophysical Journal
• 作者: P. Beiersdorfer;E. Träbert;J. Lepson;N. Brickhouse;L. Golub

Measurement of femtosecond atomic lifetimes using ion traps

使用离子阱测量飞秒原子寿命

• DOI: 10.1007/s00340-013-5586-z
• 发表时间: 2014
• 期刊: Applied Physics B
• 作者: E. Träbert