Robert, Anamaria

Following up on tests done at L1, we wanted to do the same tests at H1 and compare. We see similar large shelves when we shake RX and RY at 0.2 Hz. This mechanism is not directly limiting DARM since we have to inject a lot to see it, but it allows us to estimate how much light is around the BS area available for scattering into DARM. 

The stranger difference between the sites is that the ratio of the first shelf to the second shelf for H1 is much smaller, circa 10, so implies a second reflective path that's still fairly in line (eg like the R0 ESD reflections).

I drove 100 cts into the the corresponding ISO filter bank.

RX injection start: Oct 2 17:41:39 utc
duration: 8 min

RY injection start: Oct 2 17:58:20 utc
duration: 2 min (lost lock shortly after so weren't able to get more data)

dtts can be found in /ligo/home/anamaria.effler/ddt/ with suggestive names. I had also copied over the equivalent L1 dtts in the same directory.

Robert will folow up with some more tests.