MEASUREMENT OF THE METASTABLE HELIUM ATOMIC RATES IMPORTANT FOR ASTROPHYSICAL OBSERVATIONS
Section: EXOPLANETS
Authors:
1.
Institute of Laser Physics, SB RAS
Novosibirsk State Technical University
Novosibirsk State Technical University
2.
Institute of Laser Physics, SB RAS
Institute of Astronomy of the Russian Academy of Sciences
Institute of Astronomy of the Russian Academy of Sciences
3.
Institute of Laser Physics, SB RAS
Institute of Astronomy of the Russian Academy of Sciences
Institute of Astronomy of the Russian Academy of Sciences
Type:
Сonference article
Published:
27.12.2024
Subject area:
52
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
Language:
English
Keywords:
atomic data; atomic processes; plasmas
Funding:
This work is done in the frame of ELAG section of National Center for Physics and Mathematics.
Abstract (English):
We present an experimental setup for measurement of the collisional rates relevant for the population of the triplet level of metastable helium. To estimate and verify the theoretical values, the absorption in helium plasma in the 1083 nm line will be measured. We are going to use plasma consisting of helium ions generated by $\theta$-pinch, filling in a 6 m$^3$ volume of a vacuum chamber at concentrations of $10^{12}$–$10^{13}$ cm$^{-3}$. Based on the expected parameters, the optical depth $\tau = 1$ is going to be achieved with a path length $L = 1$ km. To increase the effective path length in the plasma, an optical scheme based on a concave resonator is proposed.
We present an experimental setup for measurement of the collisional rates relevant for the population of the triplet level of metastable helium. To estimate and verify the theoretical values, the absorption in helium plasma in the 1083 nm line will be measured. We are going to use plasma consisting of helium ions generated by $\theta$-pinch, filling in a 6 m$^3$ volume of a vacuum chamber at concentrations of $10^{12}$–$10^{13}$ cm$^{-3}$. Based on the expected parameters, the optical depth $\tau = 1$ is going to be achieved with a path length $L = 1$ km. To increase the effective path length in the plasma, an optical scheme based on a concave resonator is proposed.
Keywords:
atomic data; atomic processes; plasmas
atomic data; atomic processes; plasmas
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