TJ and I marked the position of the in-loop ISS PD ASSY-D1201065-S1400286, photo, removed it and placed a beam dump to catch the beam, photo. 

Cable (labeled H1:TCSY_4 PD_1) was unplugged moved out the way, corresponds to channels H1:TCS-ITMY_CO2_ISS_IN. We will temporarily use this PD in the CHETA experiment at Caltech. 

We haven't used the CO2 ISS since at least O3, still need to understand if we'll need to start suing the ISS again in O5.