Elevation angle alignment of quasi optical receiver mirrors of collective Thomson scattering diagnostic by sawtooth measurements
Journal article, 2012

Localized measurements of the fast ion velocity distribution function and the plasma composition measurements are of significant interest for the fusion community. Collective Thomson scattering (CTS) diagnostics allow such measurements with spatial and temporal resolution. Localized measurements require a good alignment of the optical path in the transmission line. Monitoring the alignment during the experiment greatly benefits the confidence in the CTS measurements. An in situ technique for the assessment of the elevation angle alignment of the receiver is developed. Using the CTS diagnostic on TEXTOR without a source of probing radiation in discharges with sawtooth oscillations, an elevation angle misalignment of 0.9 degrees was found with an accuracy of 0.25 degrees.


ion temperature


D. Moseev

Foundation for Fundamental Research on Matter

Max Planck Society

F. Meo

Technical University of Denmark (DTU)

S. B. Korsholm

Technical University of Denmark (DTU)

H. Bindslev

Aarhus University

Vedran Furtula

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

M. Kantor

Forschungszentrum Jülich

Russian Academy of Sciences

Foundation for Fundamental Research on Matter

F. Leipold

Technical University of Denmark (DTU)

P. K. Michelsen

Technical University of Denmark (DTU)

S. K. Nielsen

Technical University of Denmark (DTU)

M. Salewski

Technical University of Denmark (DTU)

M. Stejner

Technical University of Denmark (DTU)

Review of Scientific Instruments

0034-6748 (ISSN) 1089-7623 (eISSN)

Vol. 83 10 10E337

Subject Categories

Physical Sciences



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