Differences between revisions 1 and 3 (spanning 2 versions)

Agenda/Minutes of the VIS Meeting on 2019/10/25

2019/10/25 14:00 -

Zoom Meeting

Participants:

VIS Commissioning Task List

Post-O3 task list

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 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.

Plan for coming weeks

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)

KAGRA/Subgroups/VIS/VISMinutes20191025 (last edited 2019-11-01 13:30:19 by fabian.arellano)

-  ⇤ ← Revision 1 as of 2019-10-24 22:50:16 → 
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+   ← Revision 3 as of 2019-11-01 13:24:24 → ⇥
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-[[https://onedrive.live.com/view.aspx?resid=8E8081C20FE5EC3A!2278&ithint=file%2cxlsx&authkey=!AMFNtNa-Y6CVp94|Post-O3 task list]]
+[[https://onedrive.live.com/view.aspx?resid=8E8081C20FE5EC3A!2278&ithint=file,xlsx&authkey=!AMFNtNa-Y6CVp94|Post-O3 task list]]
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+I diagonalized the ASC degrees of freedom of the beam splitter using the oplev as a first approximation (klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=11165|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 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.
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+=== 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.
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-=== OMMT & OSTM ===
==== Past week report ====
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+ * Test of the OSTM suspension is planed in the week of 11/4.
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-  * Takahashi: 
  * Sato: 
  * Hirata:
+  * Takahashi:
  * Sato:
  * Hirata:
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   * Fujii:
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-  * Takahashi: 
  * Sato: 
  * Hirata:
+  * Takahashi: 5-7
  * Sato: 5-7
  * Hirata:
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   * Fujii: