This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.1088/0953-4075/43/14/144024 in citations.
Modelling of passive spectroscopy in the ITER divertor: the first hydrogen Balmer lines
Modelling of passive spectroscopy in the ITER divertor: the first hydrogen Balmer lines
The first lines of the hydrogen Balmer series are investigated in ITER divertor conditions using a line shape code and a plasma edge transport code. It is shown that most of the emissivity originates from a localized, cold and dense region close to the divertor target plates, where the plasma is in...
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Personal Name(s): | Rosato, J. |
---|---|
Kotov, V. / Reiter, D. | |
Contributing Institute: |
Plasmaphysik; IEK-4 JARA - HPC; JARA-HPC |
Published in: | Journal of physics / B, 43 (2010) S. 144024 |
Imprint: |
Bristol
IOP Publ.
2010
|
Physical Description: |
144024 |
DOI: |
10.1088/0953-4075/43/14/144024 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Journal of Physics B : Atomic, Molecular and Optical Physics
43 |
Subject (ZB): | |
Publikationsportal JuSER |
The first lines of the hydrogen Balmer series are investigated in ITER divertor conditions using a line shape code and a plasma edge transport code. It is shown that most of the emissivity originates from a localized, cold and dense region close to the divertor target plates, where the plasma is in the recombining regime. We simulate the signal obtained by pointing a spectrometer at this zone. The physical processes which contribute to the spectral line formation are examined, with a special emphasis on the Stark effect, photon absorption and stimulated emission. It is shown that, even though the Stark effect is significant, local information on the Doppler atomic temperature can be obtained from a fitting analysis of the D alpha spectral line shape. |