Simulating a low-temperature Maxwellian plasma using SH-HtscEBIT

Tu, Bingsheng; Li, M.C.; Lu, Qifeng; Yang, Y.; Yao, Ke; Lu, D. C.; Shen, Yang; Chen, C.Y.; Hutton, R.; Zou, Yaming; Xiao, Jun

doi:10.1016/j.physleta.2018.06.049

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…Since the nominal electron beam energy only represents the voltage difference between the cathode and the central drift tube DT2, the real electron beam energy must be corrected from that. Usually the electron beam energy can be given in the following expression [45]…”

Section: Wavelength(nm)mentioning

confidence: 99%

Observation of indirect ionization of W7+ in an electron-beam ion-trap plasma

Tian

et al. 2019

Phys. Rev. A

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In this work, visible and EUV spectra of W have been measured using the high-temperature superconducting electron-beam ion trap at the Shanghai EBIT laboratory under extremely low-energy conditions (lower than the nominal electron beam energy of 130 eV). The relevant atomic structure has been calculated by using the flexible atomic code package based on the relativistic configuration interaction method. The GRASP2K code in the framework of the multi-configuration Dirac-Hartree-Fock method is employed as well when high-precision atomic parameters are required. The W spectra are observed 2 charge states in advance according to the ionization energy of W . A hypothesis for the charge-state evolution of W is proposed based on our experimental and theoretical results, that is, the occurrence of W ions results from indirect ionization caused by cascade excitation between some metastable states of lower-charge-state W ions, at the nominal electron beam energy of 59 eV.

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Section: Wavelength(nm)mentioning

confidence: 99%

Observation of indirect ionization of W7+ in an electron-beam ion-trap plasma

Tian

et al. 2019

Phys. Rev. A

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“…To obtain the actual electron-beam energy, we adopt similar treatments as in our previous studies (see Ref. [36,62,63] for details), since the plasma environments are almost the same.…”

Section: Spectral Measurements and Line Identifications A Charge Stat...mentioning

confidence: 99%

Visible spectra of W8+ in an electron-beam ion trap

Yan

et al. 2021

Phys. Rev. A

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To provide spectroscopic data for lowly charged tungsten ions relevant to fusion research, this work focuses on the W 8+ ion. Six visible spectra lines from W 8+ in the range of 420-660 nm are observed with a compact electron-beam ion trap in Shanghai. Furthermore, transition energies are calculated for the 30 lowest levels of the 4𝑓 14 5𝑠 2 5𝑝 4 , 4𝑓 13 5𝑠 2 5𝑝 5 and 4𝑓 12 5𝑠 2 5𝑝 6 configurations of W 8+ by using the flexible atomic code (FAC) and GRASP package, respectively. Reasonably good agreement is found between our two independent atomic-structure calculations. The resulting atomic parameters are adopted to simulate the spectra based on the collisional-radiative model implemented in the FAC code. This assists us with identification of six strong magnetic dipole transitions in the 4𝑓 13 5𝑠 2 5𝑝 5 and 4𝑓 12 5𝑠 2 5𝑝 6 configurations from our experiments.

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