Change search
ReferencesLink to record
Permanent link

Direct link
Spatial resolution of the JET Thomson scattering system
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-9546-4494
Show others and affiliations
2012 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 83, no 1, 013506- p.Article in journal (Refereed) Published
Abstract [en]

The instrument function of the high resolution Thomson scattering (HRTS) diagnostic in the Joint European Torus (JET) has been calculated for use in improved pedestal profile analysis. The full width at half maximum (FWHM) of the spatial instrument response is (22 +/- 1) mm for the original HRTS system configuration and depends on the particular magnetic topology of the JET plasmas. An improvement to the optical design of the laser input system is presented. The spatial smearing across magnetic flux surfaces is reduced in this design. The new input system has been implemented (from JPN 78742, July 2009) and the HRTS instrument function corresponding to the new configuration has been improved to approximately FWHM = (9.8 +/- 0.8) mm. The reconstructed instrument kernels are used in combination with an ad hoc forward deconvolution procedure for pedestal analysis. This procedure produces good results for both the old and new setups, but the reliability of the deconvolved profiles is greatly reduced when the pedestal width is of the same order as, or less than the FWHM of the instrument kernel.

Place, publisher, year, edition, pages
2012. Vol. 83, no 1, 013506- p.
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-92360DOI: 10.1063/1.3673467ISI: 000300594900029ScopusID: 2-s2.0-84859186817OAI: diva2:516175
QC 20120417Available from: 2012-04-17 Created: 2012-04-02 Last updated: 2012-04-17Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Frassinetti, Lorenzo
By organisation
Fusion Plasma Physics
In the same journal
Review of Scientific Instruments
Fusion, Plasma and Space Physics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 46 hits
ReferencesLink to record
Permanent link

Direct link