J. Kissel

In prep for after H1SUSITMY's been full payloaded with AMDs, VMDs, and BRDs, I've created a template for measuring the highest vertical (aka "bounce") and roll mode frequencies of the new PUM + TST monolithic suspension system using the AOSEMs on the L2 / PUM. You can find the template here:
    /ligo/home/jeffrey.kissel/Templates/DTT/H1SUSITMY_L2OSEM_ASDs.xml

I attach a screenshot of what the ASDs looked like last night, 2021-01-13 at 11:00 UTC (3a PST). Remember, we expect the highest bounce and roll mode frequencies to be around 9.7 Hz and 13.8 Hz. There appear to be broad features in the ASDs at 7 to 8 Hz, 11.5 Hz, and 13 Hz, none of these really align with expectations. BUT, again, the suspension is not fully pay-loaded -- and might even be in some odd locked state as AMDs are currently being glued on. That being said, some quick back of the envelope math (see page 2 and 3 of T2000724) suggests that 100 g of missing payload would only change the bounce mode by ~10 mHz... so...

Also, I'm sure if it's alignment drift, but clearly the LR OSEM isn't registering real signal at this time -- either because the flag is all the way in or out. But, currently it's UL that shows it's completely "closed-lighted," i.e. the flag is all the way inserted in the OSEM sensor. 

But -- all this is to say, don't read to much in to these ASDs -- the QUAD is not yet finished, and the purpose of this aLOG is for the template.