I have dissasembled the axetris - EMIRS50 AT06V BR25M thermal source such that the reflective can was desoldered. Next, to properly mount the thermal source into the previously described lens tube assembly (11334) the thermal source was soldered onto a brass washer using thermal paste and the PCB oven. The end results are shown bellow in attachments 1-3. The parts for the assembly will be here on monday to be machined and assembled.

The source was placed as closely to the center of the washer as possible, but a custom washer may need to be designed such that minimum alignment is needed when assembling the fiber coulped device. 

The SNSPD will undergo a PCR test and be placed in the fridge monday as well.