Lots of historic information from FACET is here:
https://www.slac.stanford.edu/~selina/FACET/facet.html
Some important information lifted from this site is below.
Drawings
Trigger cable for Mako
IPOTRs
These are single targets on a rod. Targets have horizontal lines of 3mm long with a vertical separation of 1mm to aid camera calibration. Note that the rod holder can hold a disc with maximum thickness of 0.091 inch (or 2.3mm).
pf2574030201.pdfOTRTarget-pf25740249-0.pdf
OTR Ladders
In other OTR locations, we have a ladder of various screens and typically also a YAG.
Drawings for the Ti target:
pf2574023800-18mm-Ti.pdfTiDiscMount-pf25740245-1.pdfMountFor18mmTiDisc-sa25740246-0.pdf
FACET-II IPOTR1/2 Ladders
PF25740206-01.pdfPF25740212-01.pdfPF25740245-02.pdfPF25740298-01.pdfSA25740205-02.pdfSA25740211-01.pdfSA25740246-02.pdfSA25740265-01.pdf
Pictures of Ladders Ready for Installation
IPOTR1/2
Pictures of Installed Ladders
WDSOTR
From bottom (inserted first) to top:
1) Ti 500um
2) 50/50 W/Ta 500um
3) YAG crystal
IPOTR1/2 Upgrade
The scattering off the foils in the IPOTR1/2 ladders are too diffuse to see the Bessel spot clearly on the IPOTR1/2 cameras. To fix this, a mirror has been added to the top of the OTR ladder to directly reflect the beam into the camera.
The ladder with the new mirror is shown below:
The peak fluence expected from the Bessel focus is 250 J/cm^2. The mirrors are Newport 07SD520ER.2, which have a 1 J/cm^2 at 10ns LIDT. A similar Thorlabs mirror has the same LIDT at 10ns, but only 0.225 J/cm^2 at 800nm and 99fs. Assuming the same fs LIDT for the Newport mirror, and including a factor of safety of 5, the main laser needs to be attenuated to 0.018% or OD3.8. The fluence on the mirrors is then 0.045 J/cm^2. At 800nm cameras are saturated at about 7.69e-08 J/cm^2, the required ND on the camera is then 5.8.