Elevation angle alignment of quasi optical receiver mirrors of collective Thomson scattering diagnostic by sawtooth measurements
Artikel i vetenskaplig tidskrift, 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

Max Planck-institutet

Foundation for Fundamental Research on Matter

F. Meo

Danmarks Tekniske Universitet (DTU)

S. B. Korsholm

Danmarks Tekniske Universitet (DTU)

H. Bindslev

Aarhus Universitet

Vedran Furtula

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

M. Kantor

Forschungszentrum Jülich

Ioffe Institute

Foundation for Fundamental Research on Matter

F. Leipold

Danmarks Tekniske Universitet (DTU)

P. K. Michelsen

Danmarks Tekniske Universitet (DTU)

S. K. Nielsen

Danmarks Tekniske Universitet (DTU)

M. Salewski

Danmarks Tekniske Universitet (DTU)

M. Stejner

Danmarks Tekniske Universitet (DTU)

Review of Scientific Instruments

0034-6748 (ISSN)

Vol. 83