Daniel was seeing no response from the monitor PD for the newly installed ALS pickoff, so I went in really quick to measure the power in, power reflected, and power transmitted from the mirror directing the light into the new fiber (the PD sits after this mirror, see D1300348):

• P_in: 51.0 mW
• P_refl: 50.6 mW
• P_trans: 0.33 mW

With the power on the PD so low, I removed the 2 ND filters sitting in front of the PD and installed a light pipe (for some measure of stray light control).  Daniel now reports that he is seeing a response from the monitor PD, so with the above numbers should be able to calibrate it properly.

While I was in there I labeled both the new pickoff fiber and the spare fiber as such, and changed the label on the newly installed lens to reflect that it was a f=150mm lens (instead of the f=200mm it was previously labeled as).  Total time in the enclosure was under 30 minutes, with the laser room environmental controls (lights, AC, and HEPA fans) on for < 10 minutes (the anteroom fans and lights were on for the remainder).