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IOO (IMC)
keiko.kokeyama - 18:06 Sunday 26 May 2019 (8982) Print this report
measured the asc sensmat with the new position of IP1 isn't good

Since we moved IP1 back on the PSL table to get more separation in Gouy phase between IP1 and IP2, the ASC singsin matrices from IPs to WFSs were measured. They are still degenerate crying According to the calculation, the gouy phase separation should be ~40-50 degs, and that was the best we could do without changing the PSL layout drastically. This doesn't seem enough. PIT may be OK, but YAW IP1 won't work with this. Mmmm....

- why the sensors for YAW IP1 are so small? Is that so with given Gouy phase?
- PIT and YAW are somewhat mixed

PIT IP1 IP2
WFSA1 -364 375
WFSA2 -275 819

 

YAW IP1 IP2
WFSA1 -30 132
WFSA2 -30 316

The unit is a.u., just normalized by the actuations in cts x 1000 to look easy.

Comments to this report:
keiko.kokeyama - 19:32 Monday 27 May 2019 (8987) Print this report
IP1/IP2 PIT control was implemented in Guardian IMC_LOCK (after LSC_LOCK). YAW is something wrong (as written in the main post) and cannot be controlled.
keiko.kokeyama - 9:23 Tuesday 28 May 2019 (8990) Print this report
Did some follow up simulation. See IOO blog (in Japanese): http://gwclio.icrr.u-tokyo.ac.jp/lcgtsubgroup/inoutoptics/2019/05/imc-asc-sensmat-for-ip.html
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