In my quest to improve the stability and ease of using auxiliary lasers for the IO alignment in the HAM chambers, I designed a system that includes a platform attached to the ISI, that becomes the temporarily mount a laser to the ISI table.

This set up was necessary for aligning the MC2 Trans beam path, since the coating on MC2 allows very little light through at 0.2W of power.  At 0.2W, it's not possible to see the MC2 trans beam with the single shot beam from the PSL.

An ISC breadboard was attached to the edge of the HAM3 ISI table, a rail with a mount for a laser pointer was attached to the breadboard, and in this case two gold steering mirrors, and two irises, were used to align the MC2 Trans beam.  A picture is attached.

• The breadboard came from Corey's ISC inventory
• Mounts and rails were collected from the optics lab
• All parts that came into direct contact with the ISI were class-A and class-B
• Some parts are only cleanable to class-B-ish, like the gold steering mirrors, so were carefully mounted on class-B posts
• For future reference, the laser pointer beam was very oblong.  The beam orientation ended up at around a 45 deg angle, which was a bit more difficult to read on the irises, so in the future, I would adjust the beam orientation
• On the path to the QPD, we identified three beams, the main beam, the second internal reflection from MC2, and a reflection from the steering mirror black glass

The setup was very successful, which made it possible to align the MC2 Trans QPD.

- Cheryl, Corey, Ed, Keita