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Editor: NikaBolometer
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Size: 2093
Editor: NikaBolometer
Comment:
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Focus with lissajous scans using the quasar 3C279

  • Since the opacity is very high for the Run6, the crosses are not always sufficient for focus estimations. Therefore, we also use short lissajous scans that we perform at different focuses in order to estimate the best value.

Online analysis

The maps are fitted with a gaussian that gives the amplitude, the FWHM and the ellipticity of the beam. These values are fitted against the focus with a parabola to give the best focus.

online_1.png

online_2.png

online_3.png

online_4.png

online_5.png

online_fit.png

Offline analysis

  • We show here an offline processing of the maps with theis profiles for 5 values of the focus.

1mm

  • 1mm_map_1.png

    1mm_map_2.png

    1mm_map_3.png

    1mm_map_3.png

    1mm_map_4.png

    1mm_pro_1.png

    1mm_pro_2.png

    1mm_pro_3.png

    1mm_pro_3.png

    1mm_pro_4.png

2mm

  • 2mm_map_1.png

    2mm_map_2.png

    2mm_map_3.png

    2mm_map_3.png

    2mm_map_4.png

    2mm_pro_1.png

    2mm_pro_2.png

    2mm_pro_3.png

    2mm_pro_3.png

    2mm_pro_4.png

Focus lissajous (last edited 2013-06-15 16:46:40 by NikaBolometer)