Spectroscopy on magnetically confined plasmas using electron beam ion trap spectrometers

2008 ◽  
Vol 86 (1) ◽  
pp. 307-313 ◽  
Author(s):  
A T Graf ◽  
S Brockington ◽  
R Horton ◽  
S Howard ◽  
D Hwang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Confined Plasmas ◽  
Transmission Grating ◽  
Compact Toroid ◽  
Grating Spectrometer ◽  
Electron Beam Ion Trap ◽  
Magnetically Confined ◽  
Physics Experiment ◽  
The University

Multiple spectrometers originally designed for and used at the University of California Lawrence Livermore National Laboratory’s electron beam ion trap have found use at various magnetically confined plasma facilities. Three examples will be described. First is a soft X-ray/EUV grating spectrometer (6–150 Å), which is operating at the National Spherical Torus Experiment. Second is an EUV spectrometer with wavelength coverage up to 400 Å, which has just recently started operating at the Sustained Spheromak Physics Experiment. The last is a high-resolution transmission-grating spectrometer for visible light that has been used at the Compact Toroid Injection Experiment and is currently at the Alcator C-Mod tokamak.PACS Nos.: 39.30.+w, 52.55.–s, 32.30.Rj, 07.60.Rd, 52.70.La

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

Forbidden Transitions in the Visible Spectra of an Electron Beam Ion Trap (EBIT)

1998 ◽  
Vol 58 (6) ◽  
pp. 599-604 ◽  
Author(s):  
E Träbert ◽  
P Beiersdorfer ◽  
S B Utter ◽  
J R Crespo López-Urrutia
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Electron Beam Ion Trap ◽  
Visible Spectra ◽  
Forbidden Transitions

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

Measurements of Temperature Dynamics of Ions Trapped Inside an Electron Beam Ion Trap and Evidence for Ionisation Heating

2001 ◽  
Vol T92 (1) ◽  
pp. 147-149 ◽  
Author(s):  
F. J. Currell ◽  
F. J. Currell ◽  
H. Kuramoto ◽  
S. Ohtani ◽  
C. Scullion ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Electron Beam Ion Trap ◽  
Temperature Dynamics

scholarly journals Photoionization of ions in arbitrary charge states by synchrotron radiation in an electron beam ion trap

2009 ◽  
Vol 194 (1) ◽  
pp. 012009 ◽  
Author(s):  
M C Simon ◽  
M Schwarz ◽  
B L Schmitt ◽  
C Beilmann ◽  
S W Epp ◽  
...  
Keyword(s):  
Electron Beam ◽  
Synchrotron Radiation ◽  
Ion Trap ◽  
Electron Beam Ion Trap ◽  
Charge States ◽  
Arbitrary Charge

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
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