Monday, August 20, 2007

Measuring the seed beam profile after 3rd amplifier

We measured the seed beam profile after third amplifier, the CCD camera was put behind the convex mirror of the telescope.

Because the camera was closed to the mirror, we measured the intensity distribution. From the picture shown in the right, we found there were some dust or damaged parts. We should check the optical path and optical components to find what caused this ugly beam profile.

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