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Motional Stark Effect Diagnostic on TEXTOR
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2004 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 75, no 10, 3475-3477 p.Article in journal (Refereed) Published
Abstract [en]

A motional Stark effect diagnostic at the tokamak TEXTOR has been constructed and brought recently into operation. In contrast to diagnostics used on other tokamaks, this diagnostic reveals the direction of the magnetic field from the intensity ratio of the pi and sigma components of the emitted Balmer-alpha and not from a polarization measurement of a single line. Moreover, the complete spectrum is measured which allows determining the radial position of the measurement, and in principle the radial electric field.

Place, publisher, year, edition, pages
2004. Vol. 75, no 10, 3475-3477 p.
Keyword [en]
Approximation theory, Cameras, Charge coupled devices, Computational geometry, Doppler effect, Electric fields, Electron emission, Light polarization, Sensitivity analysis
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-6688DOI: 10.1063/1.1784535ISI: 000224755900029OAI: oai:DiVA.org:kth-6688DiVA: diva2:11467
Note
QC 20101116Available from: 2006-12-22 Created: 2006-12-22 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Development of visible spectroscopic techniques for applications in plasma diagnostics
Open this publication in new window or tab >>Development of visible spectroscopic techniques for applications in plasma diagnostics
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

In this thesis visible spectroscopy is developed and used for two applications.

Studies of motional Stark effect spectra for diagnosing the current distribution in the fusion plasmas with two different spectroscopic diagnostic systems: ratiometry and interferometry. Both systems provide non-invasive method for diagnosis of the internal plasma properties, e.g. magnetic field. Pitch angle of magnetic field lines are obtained from polarisation of Stark split Hα spectral lines emitted by energetic hydrogen atoms injected into the plasma volume by neutral beam. Several methods of calibration of the systems on TEXTOR and JET are discussed. The main result of this work is the first measurement of the safety factor radial profile with new ratiometric MSE system on TEXTOR.

Studies of molecular fragmentation of free molecules CH4 and NH3 excited with synchrotron radiation by detection of the fluorescence from the fragments. The results give the decay path ways for the molecules when excited below the N and C ionisation edges.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. xi, 39 p.
Series
Trita-FYS, ISSN 0280-316X ; 2006:66
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4252 (URN)91-7178-479-9 (ISBN)
Presentation
2006-12-12, FA31, AlbaNova univ. centrum, Roslagstullsgatan 21, Stockholm, 10:00
Opponent
Supervisors
Note
QC 20101116Available from: 2006-12-22 Created: 2006-12-22 Last updated: 2010-11-17Bibliographically approved

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Jakubowska, Katarzyna
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