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In the new compressor system, a complete set of beam pointing imagers are installed to assist the alignment remotely. An online single-shot autocorrelation (SSA), TIPA, is designated for the real-time pulse duration measurement as shown in Fig. 4.

• Input/output pointing imagers:  For the input, CompInFF, CompInNF, and CompG2 are monitoring the far field image behind the 3x telescope, near field image behind the deformable mirror, and the beam pointing on G2. Remotely, SM8 (smartact 8) will be used to center the beam on CompInFF and CompInNF. If the beam pointing is still off on CompG2, M0 can be used to adjust. We also have two cameras (Fig. 2 near field and far field) looking at compressor output. We have three motorized output mirrors (M1, M2, and M3)for adjustment. For output pointing, CompOutNF and CompOutFF are near-field and far-field imagers for output beam

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• after the compression. M1 and M2 can be used to center the beam pointings on CompOutNF and CompOutFF. M3 is used to center the beam to the target chamber reference. 
• Real-time SSA: 1% leak through M2 (99% R mirror) is directed through a side window, a downsize telescope and a 1/2 waveplate into TIPA. The autocorrelation trace can be detected with either MPA1 or MPA2 amplified beam onto a GigE camera. The intensity can be adjusted by 1/2 waveplate. The chirp induced by the glass media (M2, window and telescope) is

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• measured to be 0.6 mm of G2 translation. For example, if we obtain the shortest pulse at 11.45 mm G2 translation, the real shortest pulse should be at 11.45-0.65=10.95 (mm).

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Figure 4. 

Performance data

• TiPA measurement: 
• sweet figure
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Figure 5. 

• SSA measurement
  • sweet figure
• SPIDER measurement
  • sweet figure

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