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Figure 2 The controls of M1x, M1y, M2x, M2y, M3x, M3y, G1 rotation, and G2 rotation are on Newport XPS_1 (mcn-mec-las1). The control of G2 translation is on Newport XPS_2 (mcn-mec-las2)

Alignment

Assuming x3 telescope has aligned and the beam is at the center of CompInFF.

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• The camera CompG2 is looking at the surface of the second grating. For alignment check, it can confirm both top and bottom beams on G2 are centered on crosshairs set by the camview.  Additional information like spectral profile can be obtained by using the lineout function in the camview. 
• TIPA measurement: the TiPA hardware is on top of OPA (Fig. 1) with fourmirrors for adjusting the beam into TiPA. The TiPA software is in Laptop PC97017 located on top of GAIA. A USB cable is connecting the camera to laptop. This laptop has both TiPA and Spider. The password is on the laptop. (Fig. 3b)
• Glass correction: with TiPA real-time readout, you can adjust the compressor distance (Newport XPS 2: Comp2 G trans) to find the shortest pulse. Once you achieve the shortest pulse duration in the vacuum, the real shortest pulse should be the current compressor position - 0.7mm. This is to account for the glass dispersion. If you achieve the shortest pulse duration in the air, the real shortest pulse in the vacuum should be the current compressor position - 1.4mm. This is to account for the glass dispersion and air. (Fig. 3c) The air dispersion is not so much. It's mainly by mechanical bending of the breadboard. The detailed measurements were done and shown in Fig. 3c.