|
Size: 2091
Comment:
|
← Revision 4 as of 2019-11-01 13:30:19 ⇥
Size: 2328
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 21: | Line 21: |
| * After the correction, between angular degrees of freedom we achieved 2% coupling and there was no coherence with length when briefly checking with transfer functions. | * After the correction, between angular degrees of freedom we achieved 2% coupling when checking with offsets and there was no coherence with length when briefly checking with transfer functions. |
| Line 23: | Line 23: |
| * It's still necessary to measure the whole set of crossed transfer functions. | |
| Line 25: | Line 26: |
| * As pointed out above, measure crossed transfer function in the BS. * Do the same with SR suspensions beginning with SRM. |
Agenda/Minutes of the VIS Meeting on 2019/10/25
2019/10/25 14:00 -
Participants:
Progress report
Type-A
Past week report
Plan for coming weeks
Type B
Past week report
I diagonalized the ASC degrees of freedom of the beam splitter using the oplev as a first approximation (klog entry 11165). When the wafefront sensor becomes available we will do it again.
- Only low frequencies were considered. Actually I used DC offsets.
- After the correction, between angular degrees of freedom we achieved 2% coupling when checking with offsets and there was no coherence with length when briefly checking with transfer functions.
- Because the coherence decreased at low frequecies after the correction if we want to further reduce the coupling at low frequencies we need to actuate with a line rather than with white noise.
- It's still necessary to measure the whole set of crossed transfer functions.
Plan for coming weeks
- As pointed out above, measure crossed transfer function in the BS.
- Do the same with SR suspensions beginning with SRM.
Type-Bp
Past week report
Plan for coming weeks
OMMT & OSTM (Takahashi)
Past week report
- Assembled the new OSTM suspension using the dummy mirror. At the first time, suspension length was too long by 1cm. It was corrected.
Plan for coming weeks
- Test of the OSTM suspension is planed in the week of 11/4.
VIS electronics
Past week report
Plan for coming weeks
Other site works
Safety
- Incidents:
Discussion
Travel Plans
- Travel (Week of 10/28):
- Takahashi:
- Sato:
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
- Travel (Week of 11/4):
- Takahashi: 5-7
- Sato: 5-7
- Hirata:
- Shoda:
- Fujii:
- Tanaka:
Next meeting
On 2019/11/1(Fri)