Mike V, Richard S, Shivaraj K and Darkhan T Pcal efficiency measurements were taken at EndX on 07/22/2014, 07/23/2014 and 07/24/2014. We took in-chamber and out-of-chamber measurements on 07/22/2014 and saw >2% power drop between transmitter output and receiver input (overall efficiency). On the same day during several measurements in the beginning halogen chamber illumination lights were turned on. During measurements on following days we kept halogen illumination off. Since major power drop was between transmitter output and ETMX input (viewport+periscope), on 07/23/2014 before taking any measurements we wiped some of the periscope mirrors. By now we have * 3 samples of in-chamber measurements, efficiency of ETMX at Pcal laser wavelength (1047nm) and two viewports separately; * 5 samples of out-of-chamber measurements, for overall efficiency calculations.
Date, sample # | 07/22/2014 | 07/23/2014 sample 1 |
07/23/2014 sample 2 |
07/24/2014 sample 1 |
07/24/2014 sample 2 |
Efficiency of the viewport at transmitter module | |||||
inner beam | 0.9870 | 0.9936 | 0.9943 | ||
outer beam | 0.9756 | 0.9916 | 0.9892 | ||
Efficiency of ETMX (reflectivity) | |||||
inner beam | 0.9975 | 1.0003 | 0.9986 | ||
outer beam | 0.9938 | 0.9978 | 0.9993 | ||
Efficiency of the viewport at receiver module | |||||
inner beam | 0.9935 | 0.9951 | 0.9960 | ||
outer beam | 1.0021 | 1.0008 | 1.0011 | ||
Overall efficiency | |||||
inner beam | 0.9781 | 0.9890 | 0.9890 | 0.9858 | 0.9876 |
outer beam | 0.9717 | 0.9902 | 0.9897 | 0.9836 | 0.9848 |