Development of visible spectroscopic techniques for applications in plasma diagnostics
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
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.
Trita-FYS, ISSN 0280-316X ; 2006:66
IdentifiersURN: urn:nbn:se:kth:diva-4252ISBN: 91-7178-479-9OAI: oai:DiVA.org:kth-4252DiVA: diva2:11470
2006-12-12, FA31, AlbaNova univ. centrum, Roslagstullsgatan 21, Stockholm, 10:00
Brusell, Per, Docent
QC 201011162006-12-222006-12-222010-11-17Bibliographically approved
List of papers