Atomic lifetime measurements employing an electron beam ion trap

2008 ◽  
Vol 86 (1) ◽  
pp. 73-97 ◽  
Author(s):  
E Träbert
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Extreme Ultraviolet ◽  
Transition Probabilities ◽  
State Of The Art ◽  
Fundamental Physics ◽  
X Ray ◽  
Structure And Dynamics ◽  
Electron Beam Ion Trap ◽  
Charged Ions

Transition probabilities relate to atomic structure and dynamics in ways that are different from straightforward spectra. Besides being a tool for fundamental physics studies, the knowledge of transition probabilities is essential for applications in plasma physics and astrophysics. Techniques and procedures used for measuring the lifetimes of levels in highly charged ions by employing an electron beam ion trap are reviewed to illustrate the state of the art. Examples are drawn from experiments that involve observations in the visible, extreme-ultraviolet, and X-ray ranges, and cover atomic lifetimes in the femtosecond to second range.PACS Nos.: 32.70.Cs, 32.30.Jc, 32.30.Rj

scholarly journals Spectra of Ga-Like to Cu-Like Praseodymium and Neodymium Ions Observed in the Large Helical Device

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 46
Author(s):  
Chihiro Suzuki ◽  
Fumihiro Koike ◽  
Izumi Murakami ◽  
Tetsutarou Oishi ◽  
Naoki Tamura
Keyword(s):  
Electron Beam ◽  
High Temperature ◽  
Ion Trap ◽  
Extreme Ultraviolet ◽  
Spectral Feature ◽  
Spectral Lines ◽  
Electron Beam Ion Trap ◽  
Magnetically Confined ◽  
First Time ◽  
Charged Ions

Extreme ultraviolet (EUV) spectra of highly charged praseodymium (Pr) and neodymium (Nd) ions have been investigated in optically thin high-temperature plasmas produced in the Large Helical Device (LHD), a magnetically confined torus device for fusion research. Discrete spectral lines emitted mainly from highly charged ions having 4s or 4p outermost electrons were observed in plasmas with electron temperatures of 0.8–1.8 keV. Most of the isolated lines of Ga-like to Cu-like Nd ions were identified by a comparison with the recent data recorded in an electron beam ion trap (EBIT). The isolated lines of Pr ions corresponding to the identified lines of Nd ions were easily assigned from a similarity of the spectral feature for these two elements. As a result, some of the lines of Pr ions have been newly identified experimentally for the first time in this study.

Flat-field grating spectrometer for high-resolution soft x-ray and extreme ultraviolet measurements on an electron beam ion trap

2004 ◽  
Vol 75 (10) ◽  
pp. 3723-3726 ◽  
Author(s):  
P. Beiersdorfer ◽  
E. W. Magee ◽  
E. Träbert ◽  
H. Chen ◽  
J. K. Lepson ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Resolution ◽  
Ion Trap ◽  
Extreme Ultraviolet ◽  
X Ray ◽  
Grating Spectrometer ◽  
Electron Beam Ion Trap ◽  
Flat Field

Soft-X-ray spectra of highly charged Au ions in an electron-beam ion trap

2001 ◽  
Vol 79 (2-3) ◽  
pp. 153-162 ◽  
Author(s):  
E Träbert ◽  
P Beiersdorfer ◽  
K B Fournier ◽  
S B Utter ◽  
K L Wong
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Large Scale ◽  
Ion Trap ◽  
Electron Beam Energy ◽  
X Ray ◽  
Maximum Charge ◽  
Electron Beam Ion Trap ◽  
Atomic Structure Calculations ◽  
Structure Calculations

Systematic variation of the electron-beam energy in an electron-beam ion trap has been employed to produce soft-X-ray spectra (20 to 60 Å) of Au with well-defined maximum charge states ranging from Br- to Co-like ions. Guided by large-scale relativistic atomic structure calculations, the strongest Δn = 0 (n = 4 to n' = 4) transitions in Rb- to Cu-like ions (Au42+ – Au50+) have been identified. PACS Nos.: 32.30Rj, 39.30+w, 31.50+w, 32.20R

scholarly journals Measurements of L‐shell X‐ray emission lines of neonlike europium on an electron beam ion trap

2019 ◽  
Vol 49 (1) ◽  
pp. 21-24 ◽  
Author(s):  
Peter Beiersdorfer ◽  
Natalie Hell ◽  
Dmytro Panchenko ◽  
Greg V. Brown ◽  
Elmar Träbert ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Emission Lines ◽  
X Ray ◽  
Electron Beam Ion Trap

Structure and dynamics of highly charged heavy ions studied with the electron beam ion trap in Tokyo

2011 ◽  
Vol 199 (1-3) ◽  
pp. 123-130
Author(s):  
Nobuyuki Nakamura ◽  
Zhimin Hu ◽  
Hirofumi Watanabe ◽  
Yueming Li ◽  
Daiji Kato ◽  
...  
Keyword(s):  
Electron Beam ◽  
Heavy Ions ◽  
Ion Trap ◽  
Structure And Dynamics ◽  
Electron Beam Ion Trap
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