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The new time tool beam split 10% (~1mJ) from MPA 1 out. The beam path (purple line in Fig. 1)is routing along the wall of the MPA2 box, across the stretcher box, elevating from 3.5" to 5.5" in height, routing around the big compressor, through TT-shutter, and elevating from 5.5" to 28" to the second floor of the time tool/compressor/delay box( red area). The second floor contains delay switches, a compressor, manual delay stage. Then a periscope sends the beam down to the first floor, which contains a remote delay stage and final pointing mirrors to send the beam to the YAG stag inside the vacuum chamber.
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Figure 1. The time tool beam path is labeled in purple. The beam is split 10% (1mJ) from MPA 2 out. The T1 mirror can be adjusted to point the beam to the center of the camera imager: TT in. The route is along the wall of MPA2 box, across the stretcher box, elevating from 3.5" to 5.5" in height by the periscope (red circle), getting around the big compressor, through TT-shutter, and elevating from 5.5" to 28" to the second floor of the time tool/compressor/delay box( red area). The second floor contains delay switches, compressor, manual delay stage. Then a periscope sends the beam down to the first floor, which contains a remote delay stage and final pointing mirrors to send the beam to the YAG stage inside the vacuum chamber.
Configuration
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setup
There are various configurations. The most common two are so-called HP compressed and LP MPA2 bypassed.
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- Other configuration settings: except for LP bypass MPA2 and HP Compressed, there will be deviations according due to the OAP FL, compressor bypass, etc. Please find the details in"Configurations and time tool path lengths".
Alignment check
- T1 mirror → TT in: adjust the T1 mirror to center the beam on TTin imager.
- on the 2nd floor: center the beam on the m1 mirror. Adjust m1 to m2 center. Adjust m2 and m3 to center i1 and i2. Adjust m4 and m5 to center i3 and i4. Adjust T2 to center on TTout.
- on the 1st floor: adjust m1 and m2 to center i1 and i2. Adjust T3 to center on i3. Open GigE5 to check the beam center.
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| Figure 4 (a) Adjust the T1 mirror to center the beam on TTin imager. | Figure 4 (b) on the 2nd floor: center the beam on the m1 mirror. Adjust m1 to m2 center. |
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| Adjust m2 and m3 to center i1 and i2. Adjust m4 and m5 to center i3 and i4. Adjust T2 to center on TTout. | Figure 4 (c) on the 1st floor: adjust m1 and m2 to center i1 and i2. Adjust T3 to center on i3. Open GigE5 to check the beam center. | Figure 4 (d) on the 1st floor |
Controls on MEC Home
- Open time tool delay: (Fig. 5) MEC Home>Laser>Laser (1) > Others > NewportXPS_3 TimeTool (2)> Newport XPS 3rd channel (TT delay)
- Open GigE 5: (Fig. 5)MEC Home>Laser>Laser (1) > Others > GigE 5 Time Tool (3)
Figure 5. Control Panel
- Open TTin and TTout imagers:
Figure 6.
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