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| PR3 * At the begining of the week the IM was still touching the IRM. * First we did a health check of the IM-Y picomotor because I had the impression it had reached a limit. * We locked the BF and pushed the IRM in yaw such that the IM was hanging free. * We actuated in yaw using the picomotor and it moved freely suggesting it had not reached its limit. * With confidence in the picomotor condition we proceeded to adjust yaw and pitch until the IM became free although the OSEM flags were not at the centres of their cavities. * Measurements of IM TFs revealed the system was healthy. (IM-V TF was not measured because the SF is locked due to the plastic cover.) * '''Happily, we can consider the system to be recovered from the jammed-BF-picomotor-earthqueake event.''' * Later we moved the IM picomotors in order to move the OSEM flags closer to centers of their cavities.However, this rendered H3 out of range. * The locked theIRM and the IM and moved H3 into range, but when we released the system we realized V1 had become out of range due to a change in pitch. * We measured transfer functions with the horizontal OSEMs and they were all good. * We proceeded with the Trump method to test the pitch stability: * We carried out the procedure from the control room and used the readout from V2 and V3 (V1 out of range) and the 3D-CAD to calculate the change in pitch: '''-3.9 mrad''' ('''consistent with what was measured with an oplev when we disturbed the suspension when we glued the wire'''). * In the tunnel we carried out the procedure again and used an oplev to measure a change of '''33.4 mrad'''. '''See the videos'''. * For the same event we used the V2 and V3 OSEMs to estimate the change in pitch of the IM: '''4.1 mrad''' '''(consistent with previous measurements).''' * Today we inspected the payload visually. * We didn't find anything wrong. * Only H2 flag rotated during the Trump procedure. See pictures. |
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| * [Miyo] We have to resolve the picomotor range probblem before closing MCE and MCF chambers. * [Miyo] We will start the suspension commissioning work including the oplev calibration in next week. * [Takahashi] The pushing point for yaw picomotor will be extended with spacer in MCo. |
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| * [Takahashi] Connected the release sensors to the DGS using the exchange cables in IY. |
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| * [Ikeda] Add new RTM block of additional MN and PF OpLevs of Cryo-payload in the current RTM. * [Ikeda] ITMY is updated with new RTM. * [Ikeda] Now, the old RTM used in O3 is only installed on BS and PR3. Please see [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/RealTimeModel#RTM_Status|Wiki]] |
Contents
Agenda/Minutes
CRY+VIS Interface Meeting
Date : 13:30-
Participants : Post O3 Upgrade portal
Schedule
- IX: Oplev setting will be carried out after the next week. F0 and IP were tuned. Yaw will be adjusted after rough alignment.
- IY: Cryo-payload was removed on 3/11.
- EX: Connection is scheduled in the next week.
- EY: Cryo-payload was removed on 3/12. Cable treatment is necessary.
Status
- Corrugate tube fixing jig: The spacer is modified. They should be prepared by mid. May.
- Commissioning in air: From mid. May for IX.
- Commissioning in vacuum:
- Acceptance check: Cryo-payload in IX/EX and Type-A tower in EY/IX are on going.
- PF actuator: Not evaluated in IX, but after the commissioning for suspension.
- Jig for FC painting:
- Overall commissioning: Schedule meeting on 3/22.
- Procedure of TM height setting:
Discussion
VIS Meeting
14:00-
Participants:
Schedule
* The next week
- Type-A team: 3/22-26 installation in EY. 3/23 F0 tuning in EX.
- Type-B team: 3/22-26 PR3 setting.
Klog
EX
16260 Connection of cryo-payload , ryutaro.takahashi
General
16252 Common Type-C(OMMT1,OMMT2,OSTM) model. , satoru.ikeda
16234 Common Type-C(MCI,MCE,MCO,IMMT1,IMMT2) model. , satoru.ikeda
- 16261 Comment , satoru.ikeda
16252 Common Type-C(OMMT1,OMMT2,OSTM) model. , satoru.ikeda
- 16262 Comment , satoru.ikeda
IY
16249 Connection of release sensors to DGS , ryutaro.takahashi
16091 Monitoring of IP by ITMY venting , satoru.ikeda
16248 Comment , satoru.ikeda
16249 Connection of release sensors to DGS , ryutaro.takahashi
16251 Comment , naohisa.satou
MCF
16242 MCi and MCo oplev TX replacing , tomotada.akutsu
PR3
- 16258 Setting the alignment of PR3. , fabian.arellano
16239 Test of PR3 mirror pitch stability using the Donald Trump method. , fabian.arellano
This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py.
Summary Report
TypeA
TypeB
TypeBp
TypeC
Electronics
Control
Safety
Discussion
Travel Plans
The week from 3/22
- Takahashi: 3/22-3/26
- Sato: 3/22-3/26
- Hirata: 3/22-3/26
- Yano: 3/22-3/26
The week from 3/29
- Takahashi: 3/29-4/2
- Sato: 3/29-4/2
- Hirata: 3/29-4/2
- Yano: 3/29-4/2
Next meeting
- 2021/3/26(FRI)