TY  - JOUR
AU  - Dickheuer, Sven
AU  - Marchuk, Oleksandr
AU  - Tsankov, Tsanko Vaskov
AU  - Luggenhölscher, Dirk
AU  - Czarnetzki, Uwe
AU  - Gromelski, Wojciech
AU  - Ertmer, Stephan
AU  - Kreter, Arkadi
TI  - Measurement of the Magnetic Field in a Linear Magnetized Plasma by Tunable Diode Laser Absorption Spectroscopy
JO  - Atoms
VL  - 7
IS  - 2
SN  - 2218-2004
CY  - Basel
PB  - MDPI
M1  - FZJ-2019-03975
SP  - 48 -
PY  - 2019
AB  - Tunable diode laser absorption spectroscopy (TDLAS) is a commonly used technique to measure the temperature and density of atoms or molecules in a gas. In this work, we demonstrate that the TDLAS diagnostics could be effectively applied to measure the magnetic field in a low-density weakly magnetized plasma using the Zeeman splitting of the absorption spectrum of lines from noble gases. The laser wavelength is tailored to fit the 1s5→2p6 transition of atomic Ar with the wavelength λ=763.51nm . Two mechanisms of line broadening and splitting are observed: Doppler broadening and Zeeman effect. The latter is especially pronounced by applying polarization-selective observation of the absorption to the TDLAS measurements. By fitting the σ and π components of the absorption spectrum, the line-integrated magnetic field on the order of 30–50 mT is determined. The agreement between the measured values and the vacuum field (neglecting the impact of the plasma) calculations on the axis of the PSI-2 is found to be about 15–20%
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000474935800010
DO  - DOI:10.3390/atoms7020048
UR  - https://juser.fz-juelich.de/record/864066
ER  -