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Figure 3. upgraded grating mounts: 1. three leaf springs hold the grating via radial groove allowing clocking adjustment. 2. the grating mount sits on the rotation stage (URS75BPPV6) with and positions the grating surface on the rotation axis precisely.  3. translation with LTA motorthe LTA motorized stage is the base. 4. the manual actuator in on the back allows tilt adjustment. 

Layout of diagnostics

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 adjustwe have two cameras looking at two input reference points. We have two mirrors prior to the compressor chamber for adjustment. 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 behind compressor. M1 and M2 can be used to center the beam pointings on CompOutNF and CompOutFF. M3 is used to center the beam to 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 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 measured 

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Figure 4. Image Removed

Performance data

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